How to adjust the diesel valve?

1. Method: Open the valve cover, unscrew the adjusting nut on the rocker arm, turn the adjusting screw, and hold the valve ejector pin with your thumb and fingers to turn. When you feel a little resistance, tighten the fixing nut and it will be adjusted. Do not try too much or too little. So are other valves. This is an operation.

2. When adjusting the valve of a single-cylinder diesel engine, you can turn the flywheel and unscrew the high-pressure fuel pipe connector of the injector. When the diesel oil in the high-pressure fuel pipe is rotated by the flywheel, it reaches the compression top dead center. At this time, the intake and exhaust valves can be adjusted by stopping the flywheel, and the hot car adjustment is better.

Extended data

The main features are as follows:

1, the injection timing and fuel metering are completely separated, and the injection pressure and injection process are controlled by ECU in time;

2. The fuel injection pressure, fuel injection starting point and fuel injection duration of each cylinder can be adjusted according to the working conditions of the engine, so as to pursue the best control point of fuel injection;

3. High injection pressure and pre-injection of diesel oil can be realized.

In the automobile diesel engine, the high-speed operation makes the diesel injection time only a few thousandths of a second. Experiments show that the pressure of high-pressure tubing changes with time and position during injection. Due to the compressibility of diesel oil and the pressure fluctuation of diesel oil in high-pressure tubing, the actual fuel injection state is quite different from the plunger oil supply law stipulated by the fuel injection pump.

Sometimes, the pressure fluctuation in the oil pipe will make the pressure in the high-pressure oil pipe rise again after the main injection, reaching the pressure of opening the needle valve of the injector, and the closed needle valve will be reopened, resulting in the phenomenon of secondary injection. Because the secondary fuel injection can't burn completely, the smoke and hydrocarbon (HC) emissions are increased, and the fuel consumption is increased.

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