UAZ is a legendary car that has become famous not only among the military, but also the civilian population. The plant really did not regret strength and time to it. It is reliable, easy to maintain and repair, but requires constant attention, as it is a "seedler" problem. One of the patients is the power system. Adjusting such a complex node as the K151 carburetor on the UAZ "Bukaka" is not a complicated procedure. However, it requires the right implementation technique. Today you will learn how cleaning and adjustment is performed, as well as the adjustment of the carburetor to 151 on the UAZ.

Carburetor device to 151

The carburetor to 151 "Bakeard" works on the same scheme as similar carburetors. The challenge of preparation of the fuel and air mixture is always unchanged, followed by the engine in the engine cylinders.

Structurally, the carburetor consists of the following elements:

• Float camera;
• Throttle;
• Jets;
• Diaphragm;
• Metal case with lid;
• Adjusting screws.

In case of malfunction, the carburetor begins to work incorrectly. This means that UAZ in our case "loaf" begins to consume too much fuel or develops not complete power. There are cases that the engine can not start at all. To eliminate this problem, the carburetor needs to be removed, inspect and configure.

Explanation to the scheme:

1. cap;
2. valve of the Float Camera Unbalance;
3. float;
4. air jet of the transition system;
5. emulsion jigger of the transition system;
6. screw fastening of the spray gun of the eco-statute of the secondary section;
7. air jet of the main dosing system of the secondary section;
8. eco-status sprayer;
9. emulsion tube of the main dosing system of the secondary section;
10. accelerator pump sprayer;
11. air damper;
12. small diffuser of the primary section;
13. air jet of the main dosing system of the primary section;
14. emulsion tube of the main dosing system of the primary section;
15. block of air gibber with an emulsion tube of a idle system;
16. emulsion jicker of the idle system;
17. air jawer idling;
18. adjusting fuel fuel and accelerator pump system;
19. oscillator;
20. float Camera Housing;
21. byproof jet accelerator pump;
22. exhaust ball valve of the accelerator pump;
23. spring;
24. the diaphragm of the accelerator pump;
25. the cap of the accelerator pump;
26. acpercerative pump drive lever;
27. the main fuel jigger of the primary section;
28. a tube;
29. the diaphragms of the economize forced idling;
30. economizer valve;
31. restriction cap;
32. screw the adjusting composition of the mixture;
33. hole in the EPHH housing;
34. economy case of forced idling;
35. hole output system of idle;
36. screw operational adjustment of idling;
37. pads;
38. holes transition systems idling;
39. the throttle valve of the primary section;
40. fist drive lever accelerator pump;
41. roller of the acceleration pump lever;
42. outwater channel of the idle system;
43. throttle of the secondary section;
44. pads;
45. mixing chamber housing;
46. pipe supply tube to the electromagnetic valve;
47. tube to vacuum corrector;
48. the main fuel jet of the secondary section;
49. carter gas ventilation fitting;
50. electronic control unit;
51. microswitch;
52. filter;
53. solenoid valve;
54. fitting;
55. fuel filter;
56. fuel feed pipe;
57. bung;
58. fuel valve adjustment tongue;
59. fuel valve;
60. fuel level adjustment tongue in the float chamber;
61. electric drive valve foaming chamber.

How to remove the carburetor to 151 "Bakeard" on Uaz?

To do this, go to the car's salon to the driver's or passenger seat in front and open the engine compartment hatch. The next step is to remove the air filter. To do this, the upper nuts of the mount unscrew are unscrewed, after which the filter element itself is removed. Be careful and do not drop nuts into the diffuser!

Now unscrew the filter housing nuts. Lift it up, disconnect the thin hose and set aside the housing to the side. Now disconnect all throttle thrust associated with the throttle. In order not to break the plastic elements, it is recommended to use a flat screwdriver.

Remove the fastenings of all hoses that hold the unit and remove them. There are four nuts that hold the carburetor at the collector. Unscrew them and remove the unit.

Have questions about removal? Watch this video:

Cleaning carburetor UAZ

Before setting, you need to clean the node. To do this, disassemble the carburetor: remove the top cover and separate the throttle from the diffuser.

Cleaning is performed using special tools for cleaning throttle or any other liquid intended for these purposes. You can also use gasoline or kerosene.

Cleaning is needed 100%. It will save you from problems related to pollution, and will remove the need to do it in the near future. Therefore, you need to perform it to perform the prevention of a malfunction.

How to adjust the fuel level in the float chamber

After assembling the carburetor, you need to configure the level in the float chamber. This is the place of which the fuel consumption of the UAZ "Bukaka" depends. You can adjust it with your own hands in the garage. For this, the carburetor is installed on a regular place, tightened with nuts, and the upper cover is unscrewed and simply pressed by hand. Insert the fuel hose and pump gasoline with a manual gas station drive.

Now you need to raise the lid and put aside, and with the help of the line, measure the level in the chamber. It should be 21 millimeters. If the parameter differs from the nominal value, then you need to set the position of the float, in which the level will always be maintained at a specified level, and the needle valve will be in the closed position.

To do this, you need:

• Bend adjustment traction traction;
• Put the lid into place;
• Repeat level check.

The cycle is performed until the level in the float chamber corresponds to the norm. By the way, look in detail how to do it and on video. After the level becomes nominal, you need to collect the carburetor. All attachments are installed on it, except for the air filter and its housing. It will interfere with adjusting the air damper drive. Installation is made in reverse sequence.

How to adjust the air damper carburetor K-151?

To start the UAZ in the cold time, you need to use a starting device that is a manual drive of the air damper. The essence is such that when cold start, you need to pull the handle on yourself, thereby closing the damper, and start the engine. As the handle is heated, it is necessary to gradually return to its original position.

Now you need to adjust this position of the cable, in which the flap will be completely open and closed without jamming. To do this, completely pull the handle on the carburetor car and close the damper manually. Fix the position of the cable as on the video, and tighten the nut. Try to open and close the damper. The system should work accurately without jamming. After that, you can proceed to the idle setting.

Adjusting idling carburetor on Uaz

To 151 "Behar" does not have a screw screw as its receiver

Location and designation of carburetor fuses K-151

First of all, it is necessary to clog the hose, which comes from the valve cover at the bottom of the carburetor after these actions, the idle turn will become stable.

The procedure for reducing fuel consumption on the carburetor to 151:

1. It is required to fit the air and fuel jets.
2. To set the ignition to the edge of detonation.
3. Correctly adjust idle.

This is how the removal, installation and adjustment of the carburetor to 151 on the UAZ are performed. As you can see, in this procedure there is nothing complicated and any novice driver can cope with it. We wish good luck on the roads!

Motors UMP-4178 and UMPs-4179 are installed K151V carburetors, with the engine UMW-4218 - K151E carburetor, with the ZMZ-4021.10 engine - K151U, with the ZMZ-4104.10 engine - K151C. The design of the carburetors is the same, with the exception of some dosage elements.

K151V carburetors, K151U, K151E, K151U, K151C Motors UMP-4178, 4179, 4218 and ZMZ-4021, 4104, device.

K151B carburetors, K151E, K151U, K151 C151C-4178, 4179, 4218 and ZMZ-4021, 4104 engines have a semi-automatic start and enginehery system and an autonomous idling system with an economizer of forced idling (EPHX).

The start and warm-up system is semi-automatic, which controls the composition of the mixture after starting the engine, depending on the permanent space. The autonomous system of idling provides a decrease in the consumption of fuel and toxicity of exhaust gases.

The EPHH work is managed by an electromagnetic valve installed on the car, an EPHH and microswitch control unit installed on the carburetor. The electronic unit ensures the closure of the electromagnetic valve circuit at a crankshaft speed of less than 1050 revolutions per minute and opening the chain at a frequency of more than 1,400 revolutions per minute.

The microswitch closes the chain when the throttle control pedal is pressed and blurred - with a fully released pedal, the handle of manual throttle control in all cases is recessed until it stops.

With a closed chain, the solenoid valve reports the axes with the diaphragm cavity of the EPHX valve. Under the influence of the valve is in the open position, providing an emulsion from the idle system. With the open circuit, the solenoid valve overlaps the cutting channel, the EPHX valve closes, stopping the emulsion from the stroke system.

Thus, the EPHX valve is open:

- with an open throttle, the accelerator pedal is pressed;
- When the throttle is closed, the pedal is completely released if the rotational speed of the crankshaft does not exceed 1050 revolutions per minute.

The EPHX valve closes (saving mode) when the engine is braked, the pedal is completely released if the speed frequency exceeds 1400 revolutions per minute, and remains in a closed position until the rotational speed of the crankshaft decreases to 1050 revolutions per minute, or the throttle will not be reopened again damper. When the ignition is turned off, the EPHX valve also overlaps the emulsion supply from the idle system, which eliminates the possibility of spontaneous operation of the hot engine - the rolling ignition.

To achieve the greatest fuel economy, it is necessary to ensure that the throttle control pedal is completely released in the forced idling mode, since the microswitch is triggered at the slightest opening, and the forced idling economizer is turned off.

It is carried out using the pedal associated with the system of throttle and throttle, and throttle control knobs and carburetor air dampers. The handles are connected to the flaps with flexible thrust.

The fixation of the position of the thrust is carried out by turning them around the axis 90 degrees in any direction. When the car moves the handle handle, the carburetor should be recessed until it stops.

Maintenance of carburetors K151B, K151E, K151U, K151C.

It is periodically checking and adjusting the level of fuel in the float chamber, adjusting the low speed of the crankshaft of the engine, checking the operation of the accelerator pump and the economizer, cleaning, purging and washing the parts of the carburetor from resinous sediments, checking the bandwidth of the jets.

Checking the level of fuel should be made when the car is not working, installed on the horizontal platform. The fuel level in the carburetor float chamber should be within 20-23 mm from the plane of the foam chamber connector. Adjustment is carried out by sweetening the tray of the float, while the float must be in a horizontal position. The progress of the valve is regulated by the tongue and should be: on the engines of UMP-4178, 4179, 4218 -1.5-2.0 mm, on the engines of ZMZ-4021, 4104 - 2.0-2.3 mm.

Adjusting the minimum rotation frequency of the crankshaft in idle mode.

It is performed on a warm engine with a screw controller of the idling, and the carbon monoxide content is controlled by a screw adjustment screw of the mixture with a restrictive cap.

An adjustment of idling using gas analyzing equipment should be performed in the following sequence on the heated engine when the restrictive cap is removed:

1. Previously with an open-end operational adjustment screw set the minimum rotational speed of the crankshaft at idle.
2. To establish a screw adjustment of the mixture to the position providing CO content in the exhaust gases in the range of 0.5-1.0%.
3. Finally establish an open-running operational adjustment screw low speed at idle.
4. Check the content of CO and CH in exhaust gases that should not exceed: at the minimum speed of the crankshaft rotation - 1.5% and 1200 ppm, respectively,
At an increased 2400 revolutions per minute, the speed of rotation is 2% and 600 ppm, respectively.
5. Install a new restrictive cap.

If it is impossible to achieve these indicators of the content of CO and CH in the exhaust gases, it is necessary to diagnose the engine and its systems, eliminate faults and repeat the adjustment.

K-151l and K-151e carburetors were used on UAZ cars with UMW-421 engines. The K-151l carburetor was installed on the engine UMW-421.10 in the embodiments of 421-30 and 42107-30 with a compression ratio of 8.2, on Cars of the IAZ-31601 family.

K-151E carburetor on the engine UMW-4218.10 in versions of version 4218, 42181, 4218-01, 4218-05, 42187, 42187-01 and 42187-05 with a compression ratio 7.0, on Cars UAZ-3153, UAZ-31519, UAZ 33036, UAZ-39094, UAZ-39099 and UAZ-22069.

Carburetors K-151L and K-151E.

K-151L carburetors and K-151E two-chamber, with a falling flow and a balancing float chamber. Mixed to the inlet pipeline with four studs through two paronite gaskets, between which the stamped steel pallet was installed. Consist of three parts - cover, housing and throttle housings, and have a semi-automatic start-up and engine warming system, as well as an autonomous idling system with an economizer of forced idling (EPHX).

The start and warm-up system makes the composition of the mixture after starting the engine depending on the permanent space. At the time of starting the engine, the pneumocorrector, under the action of a vacuum occurring in the inlet, automatically opens the air damper to the desired angle, ensuring the steady operation of the engine when heating.

The autonomous system of idling provides a decrease in the flow of fuel and toxicity of the exhaust gases and is equipped with a forced idling, disconnecting the fuel supply on the engine braking mode.

Principle of operation of an economizer forced idling.

The EPHH work is managed by an electromagnetic valve installed on the car, an electronic control unit EPHX and microswitch is on the carburetor. The electronic unit ensures closure of the electromagnetic valve circuit at a crankshaft rotation frequency of less than 1000 revolutions per minute, and open circuit at a frequency of more than 1,300 revolutions per minute. The microswitch closes the chain by pressing the throttle control pedal and opens when the pedal is completely released.

With a closed circuit, the valve solenoid valve reports the axes with a diaphragm cavity of the EPHX valve. Under the action of the vacuum, the economizer valve is in the open position, providing an emulsion from the system. With an open circuit, the solenoid valve overlaps the cutting channel, the economizer valve closes, stopping the emulsion from the idle system.

Thus, the EPHX valve is open when the throttle is open when the gas pedal is pressed and when the throttle is closed when the pedal is completely released if the crankshaft rotation frequency does not exceed 1000 revolutions per minute.

The EPHX valve closes and activates the savings mode when the engine braking when the gas pedal is completely released if the crankshaft rotation frequency exceeds 1300 revolutions per minute, and remains in the closed position until the crankshaft rotation frequency decreases to 1000 revolutions per minute, or will not be The throttle is open again.

When the ignition is turned off, the Economizer valve also overlaps the emulsion supply from the idle system, which eliminates the possibility of spontaneous operation of the hot engine due to the occurrence of the so-called "cylinder ignition".

To provide greater fuel engineering of the engine, it is necessary to ensure that in the forced idling mode, the throttle control pedal was completely released, since at the slightest opening it works the microswitch and an economizer forced idling turns off.

Differences of carburetors K-151L and K-151E.

K-151l carburetors and K-151e have the same design and device, the difference lies in different calibration data of their dosing elements.

For carburetor K-151l

- Main fuel jackler: the first chamber - 230, the second camera - 340
- Block of idle juice, first camera: idling tube - 110, emulsion tube - 100
- Air jawer idling, first camera: 190
- Emulsion jibeler idling, first camera: 210

For carburetor K-151E

- Main fuel jackler: the first chamber - 230, the second camera - 330
- Main Air Juger: First Camera - 330, Second Camera - 230
- Blank fiberglass unit, first camera: idling tube - 110, emulsion tube - 85
- Air jawer idling, first camera: 175
- Emulsion hollow jibeler, first camera: 175
- transition fuel oil, Second Camera: 200
- Air jawer of the transition system, the second camera: 270

Maintenance of carburetors K-151L and K-151E.

The K-151l and Q-151 carburetors need to be periodically checking the reliability of their fastening, checking and adjusting the fuel level in the float chamber, adjusting the small speed of the engine crankshaft, cleaning, purging and washing the parts of the carburetors from resinous sediments, checking the bandwidth of the jets.

The K-151 series carburetor is produced by the domestic enterprise "Pekar". It complies with all modern standards, ensuring reliability of operation of vehicles of any kind. However, like any other vehicle assembly, the carburetor periodically needs maintenance and repair.

K-151 carburetor device

The carburetor is equipped with most domestic cars:

• cars Volga and IL;
• sUVs UAZ;
• light trucks "Gazelle" and "Sable".

Its main purpose is the preparation and adjustment of the composition of the fuel and air mixture for the internal combustion engine.

The carburetor is designed to prepare and adjust the type of fuel and air mixture for the engine

The device of the K-151 carburetor is quite complex. It consists of the following elements:

the main body with a float chamber;

second case or throttle housing, which rotate the drive from the accelerator pedal;

the top cover of the float chamber, in which the locking mechanism is located, which does not allow the camera to overpay the gasoline, and the air damper to start the cold engine;

the main dosing system (GDS) consisting of jets and fuel lines for the preparation of fuel and air mixture;

the idling system required for stable operation of the engine at idle turns consisting of a bypass channel, jets and adjusting screws, as well as an economizer valve with a membrane mechanism;

the accelerating pump mechanism that allows the car to move without failures with a sharp acceleration and consisting of additional channels in the main body, a ball valve, a membrane mechanism and a fuel sprayer;

economostat is a system designed to enrich the engine with a fuel and air mixture with a sharp increase in revolutions;

the transition system consisting of fuel and air jets and ensures the smoothness of increasing revolutions at the time of the beginning of the opening of the throttle in the secondary chamber.

K-151 carburetor device is quite complicated

K-151 has two cameras. Throttle valves in the process of work are open alternately. This ensures uninterrupted fuel supply. When entering the carburetor, the fuel passes through the fitting into which the mesh filter element is mounted. This mesh cleans gasoline from impurities and dirt. Surplus fuel through the fuel hose come back to the benzobac. All this allows you to maintain the required pressure in the fuel system.

I got acquainted with the carburetor of the Bakeard K151 I after buying a car Volga (gas 2410). Well, what can I say? The carburetor produces Pekar JSC (Petersburg carburetors) and is intended for installation on Volga cars, Gazelle (Modification K-151). Volga I will say you of course the prestigious machine of domestic production, but not economical, about fuel ... And the carburetor plays the last role. Of course, K151 more economical than K-126, which was released earlier, the capacity was added, but there are certainly disadvantages, they are present in all domestic products. The jackets are typical, and therefore it is necessary to clean them (at least once in two months). And so for the domestic car, quite a normal carburetor.

Mihail74.

http://otzovik.com/review_728025.htm l.

A serious advantage of K-151 is the presence of a suction. A cold starting engine control system on vehicles with K-151 works separately. Therefore, sometimes the cold start can be difficult. In order to avoid such problems between the crescent of the starting device and the wire of the throttle, the wire is stretched out. This wire creates a clutch between two separate mechanisms and guarantees a quick engine launch.

In this case, the sublicas can be adjusted, exposing the necessary values \u200b\u200bdepending on weather conditions.

Modifications

As part of the K-151 series, several modifications of carburetors are produced. All of them have the same principle of operation, but differ in technical characteristics.

Table: K-151 series carburetors

Modification is determined by the engine power.

Main faults and their elimination

The item is faulty if:

increases fuel consumption;

exhaust gases acquire a dark gray or black color, it is especially noticeable with a sharp press on the accelerator pedal;

the car loses the dynamics ("Tupit") during acceleration;

the engine is unstable running at idle.

Most often, the problems arising are due to the pollution of the jets - both air and fuel - due to poor-quality gasoline.

Another reason for incorrect operation of the device can be overheating its housing. Metal is deformed and the device can no longer work as usual.

In addition, malfunctions can be associated with the wear of one or more elements of the carburetor mechanism.

The engine stalls at idle

The most frequently cause of the unstable operation of the engine at idle is the emergency meter.

Often the reason for the unstable operation of the engine at idle is a faulty economizer

Sometimes the idle block itself can be faulty.

In these cases, remove the device from the car, disassemble it and visually evaluate the performance of these items. Damage to the economizer or idling block will be seen with the naked eye.

The carburetor is filled with gasoline

The reason for excess fuel in the carburetor can be a needle valve. Depending on the wear of the needle, the valve can stop retaining gasoline. Since the valve itself is in the float chamber, in this case it will be necessary to disassemble the mechanism. It will be necessary to perform a number of actions in the following order:

The top cover is removed from the carburetor.

Screw the screw fixing the axis of the float.

The axis is adjusted and the position of the float in the chamber is restored.

The valve turns on the key 10 and is replaced with a new one.

The axis of the float and the top cover are installed in place.

The needle valve provides dosage gasoline

Freezing

The carburetor engine even with a small cooling (up to -10ºС) cannot be launched without preheating. In order to avoid this, experienced motorists stretch the fine copper wire between the starting device and the throttle controller. As a result, the device warms up much faster.

What are you still from k-151 you want? Well at least works so! And if seriously: the sore manifested only now? Those. In cold weather? I am what: K-151 does not heal the idle block. Did you see him in the winter covered in winter? And 5-8 min on xx enough for frost. My 151, safely thrown back many years ago, also did not react to the composition of the mixture (more precisely did it because he wanted, and not me

Sergey Anatolyevich

http://forum.uazbuka.ru/showThread.php?t\u003d9222. 0

Tuning

A simple refinement can optimize its work and noticeably extend the service life. To do this, on the cold engine you need to perform the following operations.

From the carburetor tweaked the tube of fuel jet.

With a thin copper wire from the nest comes with the jetwork itself.

The jetwork from the electromagnetic valve is removed.

The hole in the jet is increased by 0.05-0.1 mm depending on the modification.

Modified jetwork tightened to the valve.

The removed device returns to the place.

The increase in the capacity of the jets improves the car dynamics

At the same time, it is necessary to replace the rubber valve seal.Laying the electromagnetic valve is the most vulnerable area of \u200b\u200bthe K-151 series carburetors.

An increase in the bandwidth of the fuel jet will noticeably improve the car dynamics.

Similarly, you can refine the air jet.

Carburetor repair K-151

For repair, it is necessary to know the procedure for disassembling and assembling the mechanism.

Disassembly

Full disassembly is usually not required. Nevertheless, familiarization with the order of it will be useful to any motorist. For this, the following tools will be required:

flat screwdriver;

thin Pasterns or Pliers;

horn key at 12;

horn key on 22;

To disassemble the carburetor, follow these steps:

1. Four nuts are unscrewed and the device is entirely removed from the pin.

The body from the outside is thoroughly cleaned from dirt with gasoline or kerosene and thin brushes. There are special means for cleaning carburetors.

The hull of the carburetor from the outside is thoroughly cleaned from dirt

Seven carburator cover mounting screws are turned away. The cover is removed.

From the cavity of the carburetor, plinth and traction of the starting element is removed with thin passats.

Return spring is removed from air damper.

Two screws of a float chamber cover screwdock turn away. The cover is removed from the chamber body along with the rubber seal.

A screw holder turns out with a scolder and the eco-status sprayer and its gasket is removed from the chamber.

From the starter, the lid, spring and aperture are removed.

Pulling the cork float and the float itself with a needle removes from the camera.

The locked key on 12 turns out the landing site of the needle valve of the float mechanism.

The fastening screw of fuel filter fittings turns out by the horn key.

A fuel filter is removed from the cavity of the carburetor together with gaskets and fasteners.

The float chamber itself is unscrewed by the horn key on 12.

A wrench on 12 turns away and the float chamber is removed

Using fine wire or sewed, air and fuel jets are removed.

The fuel block of the carburetor is unscrewed, then the idle block.

After removing the jets, the carburetor fuel is unscrewed

Gds gds gds removed with a slice of fine wire.

Four screws are unscrewed and an accelerative pump is removed.

The carburetor turns over and the tweet is unscrewed two screws for fastening the throttle block.

Corps are turned out of quality screws.

Video: Disassembly K-151

Full disassembly of the carburetor is carried out when washing it.

For metal parts, 644-652 solvents are used. Rubber and plastic elements are cleaned separately from metallic special cleaning agents or ordinary gasoline. The jets are cleansed fine copper wire or toothpicks.

When replacing the extension parts of the carburetor, the use of sealant for fixing them is strictly prohibited.

Assembly

When assembling the carburetor should be extremely attentive. This is due to numerous small details, each of which needs to be installed on its place.

The order of assembly K-151 is as follows:

In the empty casing of the inverted carburetor, the quality screws and two screws of throttle fastening screws are screwed.

The carburetor turns over, the accelerator pump is installed in the cavity and the two screws are screwed to the body cup.

In its sockets, the jets of the main dosing system are screwed.

A block of idling and fuel block is connected.

Fuel and air jets are neatly installed in the holes intended for them.

Installed and secured the float chamber.

A fuel filter is installed in the cup cavity, the fitting is connected.

A needle valve mechanism is returned to the place.

The float and needle are inserted.

The diaphragm and spring are connected to the starting mechanism, the mechanism closes with a lid and fixed.

The econostat is inserted on its place and is screwed to the case.

The cover of the float chamber will be screwed over its cover.

A recovery mechanism spring is installed on the air damper.

The carburetor pin is returned to his place.

The lid is installed in place and is carefully screwed.

Video: assembly K-151

Connecting hoses, tubes and wires

The carburetor installed on the engine must be connected to the hoses, tubes and wires. This is also a rather time-consuming procedure. In order not to make mistakes, hoses, tubes and wires when dismantling the carburetor should be signed or marked.

Connections are performed in the following sequence:

First, the largest fuel supply nozzle is connected to the carburetor float chamber.

The fuel return hose is connected to the lowest mount of the carburetor, with the opposite side of the side.

Two thin hoses go in different directions: one to the economizer valve, the second on the throttle of the throttle.

The vacuum hose is connected.

The latter forced ventilation hose is attached to the upper conclusion of the carburetor.

Video: Hose Connection

Thus, the K-151 series carburetor can be repaired, clean and modify independently. It is recommended to mark all the connections and details in order not to confuse them when assembling. Flushing and cleaning the carburetor with full disassembly should be carried out at least once a year. In this case, he will last as long as possible.

At the dawn of the release of passenger models of gas and UAZ-31512, along with the power units, carburetors of the K-126 series were installed. Later, these engines became equipped with the elements of the K-151 series. These carburetors are manufactured by Pekar JSC. In the process of their operation and private car owners, and enterprises faced certain difficulties in repair and maintenance. The fact is that the design was significantly different from the former models. At the same time, information on the design features were very scarce.

General data on the aggregates of the 151st series

Constructive elements of the K-151 series are seriously different from all other domestic carburetors, although their nodes and some systems are designed on the basis of typical schemes.

Depending on the release time, the aggregates of this series also had several more design options. Below we consider the features of the K-151 carburetor.

General information about the device

The unit has two nearby vertical channels. They are necessary for intake oxygen. At the bottom of each of the channels there is a throttle valve. Each of them is the carburetor chamber. The throttle drive is designed in such a way that, as pressing the pedal, one flap opens at first and only then the other. Camera, the flap of which opens earlier, is called primary.

In the middle of each of the channels for the passage of air there are special narrowings in the form of a cone. These are diffusers. What are these elements for? Due to them, the effect of the vacuum is created, on the basis of which the fuel from the float is suited to the system. The level of gasoline in the chamber required for the carburetor is supported using a special mechanism with a needle valve and float. We will tell about it in more detail.

Float with lower fuel feed

It should be noted that the K-151 carburetors this mechanism is fundamentally different from the same device in any other domestic units. In this regard, the owners are experiencing problems. Reviews are repeatedly talked about it. By the way, this element was installed on old engines from ZMZ.

So, the system together with the float and needle valve is placed in the device case. The operation of the mechanism is possible only after removing the lid. At the same time, the natural interaction of the float will not be disturbed with the level of fuel. This design is called a camera with a lower feed.

Device

So, consider in more detail the K-151 carburetor. The device of the carburetor, repair, features are described below. The element is arranged from three parts. The top is a housing cover equipped with a flange, as well as heels for mounting a air filter with a fanning device of a float chamber and with elements of the starting system. The latter through seven screws is fixed on the housing through a paper gasket.

In the carburetor device there is a middle part. This is directly the device case, where the float mechanism is built, the chamber and the fueling fitting. Also here includes a dosing system.

The lower part of the device includes a housing for throttle valves along with the drive, the idling device that is attached to the body through the gasket.

Float mechanism

When the fuel chamber is less than necessary, the float is lowered down, exempting the needle. Due to this, the cross section opens and gasoline is proceed. As the camera will be filled, the needle valve closes.

Together with a change in fuel consumption through a needle valve in automatic mode, gasoline feeds from the pump. This makes it possible to eliminate the growth of fuel pressure at the entrance to the unit.

The fuel level is never saved - it changes depending on the engine mode. So, the maximum level will be at idle. When working at full power, the level decreases slightly. This does not affect the efficiency of the device, as it is necessarily taken into account in the process of adjusting the metering system from the manufacturer.

Dosing systems

What is for the first chamber of the carburetor, which for the second, the design of dosing systems is the same. How is it arranged? There are main fuel jets that are installed at the bottom of the float chamber, and the main air jets. The latter are on the plane, in the upper part of emulsion wells. Under the main air jackets are also located emulsion tubes.

In the middle part of the emulsion wells there is a hole with a large cross section. The last on special channels is connected to the outlet holes on the sprayers. They are located in small diffusers.

How do dosage systems work?

On the K-151 carburetor, this acts as follows. Due to the vacuum in the area of \u200b\u200bspray holes, fuel through the main fuel journey rises through the emulsion well and enters the holes in emulsion tubes. Then gasoline is picked up by air pasted through the central tubes. So the fuel mixture is formed, which goes through the side channels to the sprayers. Then all this will be mixed with the main air flow.

Additional devices in the carburetor

In addition to these basic elements, the carburetor also includes other mechanisms. So, the system of idling is designed to maintain stable engine operation at turns up to 1 thousand per minute. It consists of a bypass channel, tuning screws, fuel and air gibber, an economizer valve.

The acceleration pump allows the car to move without failures and, if necessary, sharply accelerate. The system consists of valves in the main body, from the ball valve, as well as from the membrane mechanism and sprayer. According to the principle of operation, it resembles the work of the gas station.

Eco-statute is a device that allows you to enrich the fuel and air mixture at high engine speeds. A structurally element is an additional channels, through which, by increasing during open throttle, the collector gets fuel.

Also in the design there are transition systems. They are necessary for smooth increases of revolutions at the moment when the throttle of the second chamber just started open. It is a air and fuel jaw.

Fault carburetor

During operation, you can observe various faults. So, a frequent problem is a high fuel consumption, black smoke from the exhaust pipe with sharp presses on the gas pedal, unstable idling, bad dynamic characteristics, jerks and failures. In this case, you need a carburetor K-151 Setup and repair.

Most often among the causes of the breakdown, it is possible to allocate poor-quality fuel. Because of this, jets are clogged, as well as air and fuel channels. In addition, due to high temperatures, the housing can be deformed. During operation, the jackets are subjected to natural wear.

Most of the masters for whom the device and the work of the K-151 carburetor are familiar to the smallest detail, during the repair process they are trying to immediately change the jets. It is believed that it is precisely because of them that the fuel consumption is growing, and the power unit can be unstable. But there is one nuance here. Wellers if we are wear out, it is quite rare.

Adjustment

For those who are already familiar with the device of similar aggregates, will be easy to serve the K-151 carburetor. Its elements, disassembly and tuning in general are not much different from all other carburetors. To independently regulate the unit, it suffices to understand the principle and follow the instructions. Distinguish several settings for this device.

So, the adjustment is idle, air damper, fuel level in the float chamber and the position of the throttle. Change the level of fuel is only experienced masters, but any car owner can adjust idle.

Step by step includes several stages. So, you need to warm up the motor to operating temperatures, then give it to work at idle when the air damper is open. Next, unscrew the screws and quantity screws and give the engine to the maximum revolutions. Then each screw is gradually tightened until interruptions will be observed in the engine.

Using the screw of the number increases the revolutions. At the same time you need to catch the position when the engine work stabilizes. It is desirable that this screw is twisted as possible. Do not forget that this bolt affects fuel consumption.

Next rotate the screw of the amount. This seeks stable engine operation at turns within 700-800 revolutions per minute. If the quantity screw will be twisted excessively, then the failures with a sharp pressure of gas will begin. It must be unscrewed back.

Conclusion

So, we found out what the K-151 series carburetor is. Now it can be found only on old Soviet cars and "Gazelles" of the 90s with a motor from the "Volga" ZMZ-402. Reviews of those who used it are talking about the unreliability of the unit. The most successful are "Solex" and "Weber". The owners say that the K-151 requires constant adjustment and configuration. In modern conditions, it is not suitable for operation.