How to set the ignition on KamAZ correctly?

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

Knowing how to set the ignition on KamAZ using minimal equipment and tools, you can solve this problem even in the field. To do this, you need to understand the principle of the ignition system, as well as the reasons why it may fail.

What is injection timing?

On diesel vehicles, it is more correct to call the ignition the moment of injection. It represents the beginning of the fuel supply when the piston approaches top dead center (the intake and exhaust valves are closed). Maximum pressure is created in the working chamber, at this moment fuel is supplied.

How to set the ignition on KamAZ? It would seem that it is worth adjusting it once at the factory when releasing a car and not worry about it. However, not all so simple. The fact is that each power unit has a specific injection moment, due to the characteristics of the component parts of the motor. In addition, this indicator is influenced by the quality and type of fuel.

Settings

Onany automotive power plant has marks (degrees) designed just for setting the ignition. If the system is adjusted strictly according to the marks, the engine will operate in the optimal mode, provided that the injection pump, engine and fuel correspond to the reference characteristics according to GOST. By and large, the pointers are a kind of guideline that allows you to understand how to set the ignition on KamAZ.

On the car in question, the high-pressure fuel pump is placed on a key on the side of the box, and the high-pressure fuel pump coupling can be fixed in two positions with a difference of 180 degrees. As a rule, if the actuator clamping screw is located at the top, then the injection pump and coupling marks should be placed opposite.

Features

After all the parts are set according to the marks, it is necessary to tighten the fixing elements and start the engine. The car should start without problems the first time. If the truck does not start or white smoke comes out of the exhaust system, then the alignment is done with a violation of 180 degrees. You will need to unscrew the required parts and turn them 180 °, restart the engine.

If there are no marks or there are extra risks, it is advisable to set the elements approximately in the middle of the adjustment icons. To understand how to correctly set the ignition on KamAZ, it is necessary to take into account the signs of late and early injection.

Early injection timing

With early ignition, the piston does not have time to reach the top point, and the fuel is already starting toenter the working chamber. Key signs of this moment:

• Motor hard work.
• When the gas pedal is actively pressed, a characteristic ringing is heard, which increases with the temperature of the power unit.
• May emit white smoke from the exhaust.
• There is poor traction.
• Fuel consumption increases.

Late ignition: signs

When the injection is late, the piston goes down from the top dead center, and the fuel is just starting to flow, the ignition follows. Problem symptoms:

• Appearance of white smoke from the exhaust system. The later the ignition, the more smoke is observed.
• Motor revs incorrectly.
• There is too soft operation of the power unit.
• When the gas pedal is smoothly activated, the engine starts to shake at medium speeds, and when the torque increases, this effect disappears sharply.
• Fuel consumption increases, the engine heats up, the truck pulls poorly.

How to correctly set the ignition on KamAZ "Euro"?

Factory settings predominantly assume slightly late injection timing. If it is necessary to correct the assembly in the direction of early ignition, perform the following manipulations:

1. Injection timing is set at engine operating temperature.
2. The drive is adjusted so that the mark is on top.
3. Let go twofixing screws on "17".
4. Only the injection pump clutch will need to be rotated.
5. To boost early ignition, the drive turns clockwise, and for late injection, counterclockwise.

Adjustment should be made literally by a millimeter, with the obligatory tightening of the bolts.

Knowing how to set the ignition on KamAZ, after setting it up, you should start the engine and check. If the operation of the power unit does not suit the owner, the manipulations with the setting continue until a slight ringing appears when the gas pedal is sharply activated. After another small shift, it will disappear, which will indicate that the required ignition point has been reached. A correctly set injection point will allow you to achieve better traction, fuel economy, which is important when operating any equipment.

KAMAZ-740: how to set the ignition?

The injection timing is set simultaneously with the installation of the injection pump. The stages of work are given below:

• The cab rises until the latch snaps into place.
• The stem of the flywheel housing is lifted and rotated 90 degrees, placed in a special niche on the body.
• A couple of bolts are unscrewed at the bottom and the dirt protection shield is dismantled.
• A metal rod with a diameter of 10 and a length of about 400 mm is inserted through the slot into the flywheel hole.
• The crankshaft is turned from left to right until its movement is blocked by the detent rod.
• Checking the position of the drive shaftHigh pressure fuel pump located in the collapse of the cylinder block.
• If the fuel pump drive coupling is turned up with the working scale, align the zero point with the mark on the pump flange, and then tighten the two fixing bolts.
• If the position of the part is reversed, raise the stopper, crank the crankshaft one turn, repeat the steps above.

Now let's look at how to set the ignition on KamAZ "Euro-2" at the final stage. After tightening the bolts of the high-pressure fuel pump drive coupling, the stopper is lifted up, rotated 90 degrees, and lowered into the mounting groove. A dirt protection shield is mounted in the lower part of the casing. The car cabin is lowered, the latches are placed in the upper position.

Finally

Despite the fact that the diesel power unit has a simple and understandable design, the elements of its fuel system are classified as high-precision instruments. In this regard, the installation of a high-pressure fuel pump requires special attention and optimal determination of the angle of injection of diesel fuel through the nozzle into the working cylinder at the compression stage. Even an error of just one degree can lead to engine failure, which will require an extraordinary overhaul. Reliable KAMAZ Euro trucks are popular in various fields. How to set the ignition on different modifications, discussed above. Knowing the features of this procedure, it is quite possible to adjust the moment of fuel injection on your own with minimal time and equipment.