How to judge and calculate the pressure difference of each cylinder of the engine

Release time:

2023-12-29

Pneumatic technical standards: CA6102:934KaEQ6100 is not less than 834KPa, and the service limit is 670KPa. The fourth cylinder does not meet the conditions. Check and calculate the average value of two measurements for each cylinder: then calculate the average pressure of the six cylinders.

pneumatic technical standards:
CA6102:934KaEQ6100 is not less than 834KPa, and the service limit is 670KPa. The fourth cylinder does not meet the conditions. Check and calculate the average value of two measurements for each cylinder: then calculate the average pressure of the six cylinders.
Calculate whether the pressure difference of each cylinder exceeds 6% of the average value
The maximum value of the average is: 802.5x(1+5%)= 842.625Kp8 The minimum value of the average is: 802 5x(1-5%)= 762.375Kpa
If the average value of the measurement is between (762.375-842625)Kpa, the requirement is met. The fourth cylinder is less than the average value and should be checked.
Measuring cylinder pressure is a simple and scientific way to diagnose engine faults. The correct use of the method of measuring cylinder pressure can accurately and quickly diagnose some common engine failures, especially those that drivers and maintenance personnel should master.
When the ambient temperature is not lower than -5 ℃, the car should start smoothly, allowing no more than 3 times, and each start does not exceed 5s. Check whether there are more than three starts or more than 5 seconds of start-up unqualified. The hot car starts the engine. Under normal operating temperature, it can be started within 5 seconds. If it does not meet the requirements, the vacuum degree is unqualified. When the gasoline engine is idling, the vacuum of the intake manifold should be in the range of 57-70kPa. (The plane shall prevail) does not meet the requirements is the vacuum degree fluctuation range is unqualified. When the engine starts, the vacuum of the intake manifold fluctuates
The six-cylinder gasoline engine does not exceed 3kPa, and the four-river gasoline engine does not exceed 5kPa. Check atmospheric pressure against sea level using tachometer and vacuum gauge.
Standard) does not meet the requirements is the cylinder pressure value is unqualified. The compression pressure of the cylinder shall meet the original design requirements. Use tachometer. The cylinder pressure gauge inspection does not meet the requirements. The differential pressure per cylinder is the difference between the pressure per cylinder and the average pressure per cylinder. Not more than 89, diesel engine not more than 10% use tachometer, cylinder pressure gauge or engine comprehensive analyzer measurement does not meet the requirements for unqualified

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