How to judge and calculate the pressure difference of each cylinder of the engine
Gas pressure technical standards: CA6102:934KPaEQ6100 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 of each cylinder: then calculate the average pressure of the six cylinders.
Release time:
2024-11-25
gas pressure technical standards:
CA6102:934KPaEQ6100 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 of 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: 8025x(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 faults of the engine, especially the method that the driver and repairman 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 time should not exceed 5s. Check and start more than 3 times or more than 5S is 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. (plane shall prevail) does not meet the requirements for vacuum fluctuation range is unqualified. When the engine starts, the vacuum degree of the intake manifold fluctuates greatly
Six-cylinder gasoline engines do not exceed 3kPa, four-cylinder gasoline engines do not exceed 5kPa. Check atmospheric pressure based on sea level using tachometer and vacuum gauge.
Standard) does not meet the requirements for 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 of each cylinder refers to the difference between the pressure of each cylinder and the average pressure of each cylinder. Not more than 89, diesel engine not more than 10% with tachometer, cylinder pressure gauge or engine comprehensive analyzer measurement does not meet the requirements for unqualified
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