Jichai 12V190 single cylinder valve adjustment scale

The scales of Jichai 12V190 single-cylinder valve adjustment are:

1 cylinder -0°, 2 cylinders -120°, 3 cylinders -240°, 4 cylinders -240°, 5 cylinders -120°, 6 cylinders -0°

7 cylinders - 300° 8 cylinders - 60° 9 cylinders - 180° 10 cylinders - 180° 11 cylinders - 60° 12 cylinders - 300°

The specific adjustment method is as follows:

1.The piston of the cylinder to be adjusted is positioned at the top dead center of the compression stroke; Under the condition that the serial number 2 adjusting bolt assembly is loosened and the oil sealing plane of the exhaust valve rocker arm is not compressed, the plug gauge placed between the serial number 5 valve rocker arm piston and the end face of the exhaust valve stem or the end face of the valve cap is first adjusted by adjusting the valve clearance adjustment screw of the valve push rod end sequence number 10, and then the locknut pointed to by the arrow in the figure is tightened.

Note: During the adjustment process, the valve clearance adjustment screw should be turned until the plug gauge is clamped, so as to ensure that the piston of the valve rocker arm of serial number 5 is pressed to the end, and there is no gap between the bottom plane of the piston mounting hole in the exhaust valve rocker arm;

2.The plug gauge that is placed between the valve rocker arm piston and the end face of the exhaust stem or the end face of the valve cap is adjusted by adjusting the bolt assembly of the serial number 2, and the clearance of the valve end is adjusted to, and then the locknut pointed to by the arrow in the figure is tightened.

Note: During the adjustment process, the serial number 2 adjustment bolt assembly should be turned until the plug gauge is clamped, so as to ensure that the serial number 5 valve rocker arm piston is pressed to the end, and there is no gap between the bottom plane of the piston mounting hole in the exhaust valve rocker arm.

First, turn the car and point the pointer to "0" degrees; Open the upper housing of the first and sixth cylinders, twist the tappets of the two cylinders by hand, and adjust from the cylinder where the tappet can be rotated. The order is: 1-8-5-10-3-7-6-11-2-9-4-12.

Adjust the scale to:

1 cylinder - 0 ° 8 cylinder - 60 °

5 cylinders -120°

10 cylinders -180°

3 cylinders -240°

7 cylinders - 300°

6 cylinders - 0 ° 11 cylinders - 60 °

2 cylinders -120°

9 cylinders - 180°

4 cylinders -240°

12 cylinders -300°

Rotate the valve left and right to adjust to the appropriate position.

The possibility of opening the valve early and closing late can be seen from the dynamometer diagram that when the piston reaches the bottom dead center of the intake, due to the existence of the intake suction, the gas pressure in the cylinder is still lower than the atmospheric pressure, and the air can still be inlet under the action of atmospheric pressure, and the intake air flow has a large inertia at this time. It can be seen that late closing of the intake valve can increase the air intake.

The main advantages: the car intake valve is opened early, so that the air intake has a larger channel area at the beginning, can increase the air intake, at the end of the work stroke, the exhaust valve is opened, and the residual pressure of the work can be used to make the exhaust gas rush out of the cylinder at high speed, and the exhaust volume accounts for about 50%.

The characteristics of the traditional diesel engine: good thermal efficiency and economy, the diesel engine uses the method of compressed air to increase the air temperature, so that the air temperature exceeds the spontaneous ignition point of the diesel, and then sprays the diesel, diesel spray and air mixture at the same time ignition and combustion. As a result, the diesel engine does not require an ignition system.

At the same time, the fuel supply system of diesel engines is also relatively simple, so the reliability of diesel engines is better than that of gasoline engines. Due to the fact that it is not limited by deflagration and the need for spontaneous combustion of diesel, the compression ratio of diesel engines is very high. The thermal efficiency and economy are better than that of the gasoline engine, and at the same time, under the same power, the torque of the diesel engine is large, and the speed at the maximum power is low, which is suitable for the use of cargo vehicles.

First turn the flywheel to 0 degrees and then touch a cylinder tappet, if you can rotate, adjust a just intake exhaust valve, two intake, three rows, **. Five-row, eight-cylinder fully tuned. Nine in. Ten rows, twelve cylinders fully tuned. Then rotate the flywheel to zero degrees, and then adjust the unadjusted one, remembering the intake and exhaust valves.

Four adjustment methods can be adopted, one cylinder compresses the top dead center to adjust the cylinder intake and exhaust valves, the turning 180 degrees adjust the 3, 5, 10 cylinders, and the three cylinders are adjusted according to the work sequence disc 180. Anyway, it's two laps of the car, and this method is easier to remember.

Summary. The piston of the cylinder to be adjusted is positioned at the top dead center of the compression stroke; Under the condition that the serial number 2 adjusting bolt assembly is loosened and the oil sealing plane of the exhaust valve rocker arm is not compressed, the plug gauge placed between the serial number 5 valve rocker arm piston and the end face of the exhaust valve stem or the end face of the valve cap is first adjusted by adjusting the valve clearance adjustment screw of the valve push rod end sequence number 10, and then the locknut pointed to by the arrow in the figure is tightened.

The piston of the cylinder to be adjusted is positioned at the top dead center of the compression stroke; In the case that the serial number 2 adjusting bolt assembly is loosened and the oil sealing plane of the exhaust valve rocker arm is not compressed, the plug gauge that is put into the gap between the piston of the valve rocker arm of the 5 valve and the end face of the exhaust valve stem or the end face of the valve cap is broken, and the total valve clearance is adjusted by adjusting the valve push rod end sequence number 10 valve clearance adjustment screw, and then the locknut pointed to by the arrow in the figure is tightened.

Note: During the adjustment process, the air grill ballast valve clearance adjustment screw should be rotated until the plug gauge is clamped, so as to ensure that the piston of the valve rocker arm of Serial No. 5 is pressed to the end, and there is no gap between the bottom plane of the piston installation spring ridge hole in the exhaust valve rocker arm; The plug gauge that is put into between the serial No. 5 valve rocker arm piston and the end face of the exhaust valve stem or the end face of the valve cap is adjusted by adjusting the sequence travel size 2 adjusting bolt assembly, and the clearance of the valve end is adjusted to, and the serial number 2 adjusting bolt assembly should be rotated until the plug gauge is clamped during the adjustment process, so as to ensure that the serial No. 5 valve rocker arm piston is pressed to the end, and there is no gap between the bottom plane of the piston mounting hole in the exhaust valve rocker arm.

Summary. Hello dear<>

There are many ways to adjust the oil supply of a single cylinder to the piston pump of Jichai 12V190 diesel engine, and the most simple and simple operation is the zero adjustment method! That is, to remove the oil pipe, it is best to remove the oil outlet valve core at the same time, and add a certain pressure of fuel at the pump end. 190 is a combination pump, select the first plunger to adjust, so that its plunger is placed in the lowest position, and then slightly dial the tooth bar, observe from the top to the inside of the plunger sleeve, until the oil inlet is slightly opened, and the pressure fuel enters the plunger sleeve and then slightly dial back the tooth bar to the oil inlet port is closed, this point is the zero position of oil supply.

Then fix the tooth shank, adjust the other cylinders in turn, and the position adjustment of the other cylinders is carried out on the ring gear! Such adjustment can basically ensure that the theoretical oil supply of each cylinder is consistent, due to the wear deviation of each plunger sleeve oil outlet valve caused by the diesel engine in use, the air tightness deviation of each cylinder, etc., will also produce the error of the oil supply of each cylinder, exhaust temperature, burst pressure, etc. It is necessary to make relative adjustments in the later stage according to the actual situation.

For example, the plunger of a cylinder has a large leakage, and the compression pressure of the cylinder is low, etc., and the oil supply of the cylinder is increased

How to adjust the fuel supply of a single cylinder for Jichai 12V190 diesel engine.

Hello dear<>

There are many ways to adjust the oil supply of a single cylinder to the piston pump of Jichai 12V190 diesel engine, and the most simple and simple operation is the zero adjustment method! That is, to remove the oil pipe, it is best to remove the oil outlet valve core at the same time, and add a certain pressure of fuel at the collapsed end of the pump. 190 is a combination pump, select the first plunger to adjust, so that its plunger is placed in the lowest position, and then slightly dial the tooth bar, observe from the top to the inside of the plunger sleeve, until the oil inlet is slightly opened, and the pressure fuel enters the plunger sleeve and then slightly dial back the tooth bar to the oil inlet port is closed, this point is the zero position of oil supply.

Then the scale is fixed to the tooth shank, and the other cylinders are adjusted in turn, and the position adjustment of the other cylinders is carried out on the gear ring! Such adjustment can basically ensure that the theoretical oil supply of each cylinder is consistent, due to the wear deviation of each plunger sleeve oil outlet valve caused by the diesel engine in use, the air tightness deviation of each cylinder, etc., will also produce the error of the oil supply of each cylinder, exhaust temperature, burst pressure, etc. It is necessary to make relative adjustments to the field circle in the later stage according to the actual situation.

For example, the plunger of a cylinder has a large leakage, and the compression pressure of the cylinder is low, etc., and the oil supply of the cylinder is increased) A2