Knowing how to set the ignition on KamAZ using the minimum equipment and tools, it is possible to solve this problem even in the field. For this, it is necessary to understand the principle of operation of the ignition system, as well as the reasons why it may fail.
What is the injection moment?
On diesel cars it is more correct to call ignition the moment of injection. It represents the beginning of the fuel supply when the piston approaches the top dead center (intake and exhaust valves are closed). The 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 with the release of a car and not to worry about this. However, not all so simple. The fact is that each power unit has a specific injection moment, in connection with the features of the components of the motor. In addition, this indicator is affected by the quality and type of fuel.
Customization
On any automotive power plant there are marks (degrees) designed just for setting the ignition. If the system is adjusted strictly according to the marks, the motor will operate in optimal mode, provided that the high-pressure fuel pump, engine and fuel meet the standard specifications according to GOST. By and large, the indicators are a kind of guideline that allows you to understand how to set the ignition on KamAZ.
On the vehicle in question, a high-pressure pump for fuel is placed on the key on the side of the box, and the injection pump clutch can be fixed in two positions with a difference of 180 degrees. As a rule, if the clamping screw of the drive is located in the upper part, then the marks of the high pressure fuel pump and the coupling should be located opposite.
Features
After all the parts are set according to marks, it is necessary to tighten the locking elements and start the engine. The car should start without problems the first time. If the truck does not start or there is white smoke coming from the exhaust system , it means that the alignment was performed with a 180 degree violation. You will need to unscrew the required parts and rotate them through 180 °, restart the engine.
In the absence of marks or the presence of excess pictures, it is advisable to expose 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
With early ignition, the piston does not have time to reach the upper point, and the fuel is already beginning to enter the working chamber. The main signs of this moment:
- Hard work of the motor.
- When the gas pedal is actively pressed, a characteristic ringing is heard, amplifying with increasing temperature of the power unit.
- Perhaps the appearance of white smoke from the exhaust pipe.
- Poor traction.
- Increases fuel consumption.
Late ignition: signs
With a late injection moment, the piston goes down from the top dead center, and the fuel just starts to be supplied, the ignition goes after it. Symptoms of the problem:
- The appearance of white smoke from the exhaust system. The later the ignition, the more smoke is observed.
- Motor incorrectly gaining momentum.
- Too soft work of the power unit is observed.
- With a smooth activation of the gas pedal, the motor begins to shake at medium speeds, and with an increase in torque, this effect disappears sharply.
- Fuel consumption increases, the engine heats up, the truck pulls poorly.
How to set the ignition on KamAZ "Euro"?
Factory settings predominantly involve a slightly late injection moment. If it is necessary to correct the unit in the direction of early ignition, perform the following manipulations:
- The injection moment is set at the operating temperature of the motor.
- The drive is adjusted so that the mark is on top.
- Loosen the two fixing screws at “17”.
- Only the injection pump clutch will need to be rotated.
- To enhance early ignition, the drive rotates clockwise, and for late injection - against movement.
Make adjustments literally in millimeters, with the mandatory 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 adjustment continue until, when the gas pedal is sharply activated, a slight ringing appears. After another small shift, it will disappear, which will indicate the achievement of the required ignition timing. 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 moment is set simultaneously with the installation of the injection pump. The steps are listed below:
- The cabin rises until the latch clicks into place.
- The rod of the flywheel housing is raised and rotated 90 degrees, placed in a special niche on the housing.
- In the lower part, a couple of bolts are unscrewed and the dirt shield is removed.
- Through a slot, a metal rod with a diameter of 10 and a length of about 400 mm is inserted into the flywheel hole.
- The crankshaft is rotated from left to right until it is blocked by the movement of the locking rod.
- The position of the injection pump drive shaft located in the collapse of the cylinder block is checked.
- If the fuel pump drive clutch is turned upwards by the working scale, combine the zero point with the mark on the pump flange, and then tighten the two mounting bolts.
- If the position of the part is opposite, raise the stopper, crank the crankshaft one revolution, repeat the steps above.
Now we will consider how to set the ignition on KAMAZ Euro-2 at the final stage. After tightening the bolts of the injection pump clutch, the stopper is raised up, rotated 90 degrees, lowered into the landing groove. In the lower part of the casing, a dirt protection shield is mounted. The car cabin is lowered, the latches are placed in the upper position.
In conclusion
Despite the fact that the diesel power unit has a simple and understandable design, the elements of its fuel system are ranked as high-precision devices. In this regard, the installation of a high-pressure fuel pump requires special attention and optimal determination of the angle of the moment of injection of diesel fuel through the nozzle into the working cylinder at the compression stage. Even an error of only one degree can lead to engine failure, which will require an extraordinary overhaul. Reliable trucks KamAZ Euro 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 our own with minimal time and equipment.