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List of catalogs of this article:

• 1,Global import export freight indexes gas Detection method of cylinder compression pressure
• 2, Detection and diagnosis of low engine cylinder pressure
• 3, How to detect the engine cylinder pressure?
• 4, What is the method of engine cylinder pressure detection?
• 5. Detection method of cylinder pressure

Detection method of cylinder compression pressure

When the piston reaches the upper stop point of the compression end, the tightness of the cylinder can be indicated by detecting the compression pressure of the cylinder. The detection methods include cylinder pressure gauge and cylinder pressure tester. Check with a cylinder pressure gauge. The cylinder pressure gauge is shown in Figure 2-3.

Use the starter to drive the engine to run for 3-5s, and the speed is within the normal range (about 150r/min); record the reading of the cylinder pressure gauge, repeat 2-3 times, and take the average value. If you don't need a starter to drive the engine, you can also turn the engine 1-2 times.

The detection method of cylinder compression pressure is to measure the cylinder pressure with a cylinder pressure gauge: (1) the engine runs to normal temperature, and the coolant temperature is 85-95 degrees (2) Remove all spark plugs or fuel injectors, and iron the high-voltage wire.

The first method is to inject a little oil (20-30ml) into the spark plug hole and then measure the cylinder pressure. If the compression pressure of the cylinder is the same as before oil injection, it is a valve leakage; if the measured value is more than before oil injection, it means that the cylinder wall, piston, piston ring and other parts are seriously worn.

Using this method, it should be noted that each cylinder has a large number of measurements and twice, and it is best to take its average. In addition, during the second measurement, a little oil can be injected from the spark plug hole, and then the cylinder pressure can be measured. THE AMOUNT OF OIL INJECTED IS 20~30ML.If the compression pressure of the cylinder is the same as before oiling, it can be judged that the valve is leaking.

Detection and diagnosis of low engine cylinder pressure

The second method is The spark plug of the cylinder of the gasoline engine has been tested to determine the measured value of the cylinder pressure. With EQTake the 6100 engine as an example, the measurement method of cylinder pressure is as follows: after reaching the normal operating temperature, the engine should be turned off. Remove the spark plugs of the gasoline engine cylinder. Put the throttle valve and the air barrier in a fully open position.

Diagnostic method of insufficient cylinder pressure: the engine operation is not stable, the exhaust pipe has a sudden sound, or the carburetor has a teaponing phenomenon, which may indicate that the cylinder pressure is insufficient. Cold start is difficult, and there is no obvious change in climbing. Without decompression, the shaking car can overcome the upper stop of the piston compression stroke, indicating that the cylinder pressure may be insufficient.

Check the pressure of each cylinder according to the above method. If the pressure in one or more cylinders is too low, or the pressure difference between the cylinders is too large, drop a few drops of engine oil inward, and then check the pressure again.

All and most of the cylinders are too low pressure because of this reason;The inlet and exhaust valves are not tightly closed, resulting in insufficient cylinder pressure. The valve conical ablation, the bending or breaking of the valve, and the improper adjustment of the gap will all lead to the cylinder sealing and insufficient cylinder pressure.

Detect the cylinder pressure according to the following steps. Step 1: Install the cylinder pressure gauge on the engine. Part II: Heat the car first, let the engine run to normal temperature, and keep the coolant temperature between 85 and 95 degrees. Step 3: Remove all the spark plugs or fuel injectors on the car, and iron the high-voltage wire.

How to detect the engine cylinder pressure?

Blow with compressed air. First, use compressed air to clean the dirt around the spark plug and remove all the spark plugs. For gasoline engines, the secondary high-voltage line of the ignition system should also be unplugged and reliably grounded to prevent electric shock or fire.

The method of measuring the cylinder pressure with a cylinder pressure gauge: (1) The engine runs to normal temperature, and the temperature of the coolant is 85-95 degrees. ( 2) Remove all spark plugs or fuel injectors, and iron the high-voltage wire. ( 3) When you step on the accelerator, the throttle valve is fully open.

Measurement method and determination of numerical values. Before measuring the cylinder pressure, all spark plugs should be removed and the measuring gauge back to zero should be touched at the spark plug seat hole of the cylinder being measured (some cylinder pressure gauges are screwed on the spark plug hole). Start the engine, observe and remember the value indicated by the first beating of the needle.

A little oil (20-30ml) can be injected into the spark plug hole, and then the cylinder pressure can be measured. If the compression pressure of the cylinder is the same as before oil injection, it is a valve leakage; if the measured value is increased compared with before oil injection, the cylinder wall, piston, piston ring and other parts are seriously worn.

The engine cylinder pressure detection steps are as follows: preheat and stop the engine; remove the hood cover; disconnect the positive pole of the ignition system from the primary ignition coil so that it does not work, and insulate other wires with electrician tape so that they cannot contact the ground wire.

The detection method of cylinder pressure should be carried out according to the following steps. Step 1: Install the cylinder pressure gauge on the engine. Part 2: Heat the car first, let the engine run to normal temperature, and keep the temperature of the coolant between 85 and 95 degrees. Step 3: Remove all the spark plugs or fuel injectors on the car, and iron the high-voltage wire.

What is the method of engine cylinder pressure detection?

The first method is to inject a little oil (20-30ml) into the spark plug hole, and then measure the cylinder pressure.If the compression pressure of the cylinder is the same as before oil injection, it is a valve leakage; if the measured value is more than before oil injection, it means that the cylinder wall, piston, piston ring and other parts are seriously worn.

The piston should slide smoothly in the cylinder; end cover: The end cover is equipped with inlet and exhaust ports, and some are also equipped with a buffer mechanism in the end cover.

The method of detecting cylinder pressure is as follows. Step 1: Install a cylinder pressure gauge on the engine. Part II: Warm up the car first, let the engine run to room temperature, and keep the coolant temperature between 85 and 95 degrees. Step 3: Remove all spark plugs or fuel injectors on the vehicle and ground the high-voltage wire. Step 4: Step on the accelerator and open the accelerator at full.

The detection method of cylinder pressure should be carried out according to the following steps. Step 1: Install the cylinder pressure gauge on the engine.Part 2: Heat the car first, let the engine run to normal temperature, and keep the temperature of the coolant between 85 and 95 degrees. Step 3: Remove all the spark plugs or fuel injectors on the car, and iron the high-voltage wire.

The engine cylinder pressure detection steps are as follows: preheat and stop the engine; remove the hood cover; disconnect the positive pole of the ignition system from the primary ignition coil so that it does not work, and insulate other wires with electrician tape so that they cannot contact the ground wire.

The detection method of cylinder compression pressure is to measure the cylinder pressure with a cylinder pressure gauge: (1) the engine runs to normal temperature, and the coolant temperature is 85-95 degrees (2) Remove all spark plugs or fuel injectors, and iron the high-voltage wire.

The detection method of cylinder pressure

1. The method of detecting cylinder pressure is as follows. Step 1: Install a cylinder pressure gauge on the engine. Part II: Warm up the car first, let the engine run to room temperature, and keep the coolant temperature between 85 and 95 degrees. Step 3: Remove all spark plugs or fuel injectors on the vehicle and ground the high-voltage wire. Step 4: Step on the accelerator and open the accelerator at full.

2. The first method is to inject a little oil (20-30ml) into the spark plug hole, and then measure the cylinder pressure. If the compression pressure of the cylinder is the same as before oil injection, it is a valve leakage; if the measured value is more than before oil injection, it means that the cylinder wall, piston, piston ring and other parts are seriously worn.

3. The detection method of cylinder pressure should be carried out according to the following steps. Step 1: Install the cylinder pressure gauge on the engine.Part 2: Heat the car first, let the engine run to normal temperature, and keep the temperature of the coolant between 85 and 95 degrees. Step 3: Remove all the spark plugs or fuel injectors on the car, and iron the high-voltage wire.

4. Take the EQ6100 engine cylinder pressure test as an example: after reaching the normal working temperature, the engine should be turned off. Remove the spark plugs of the gasoline engine cylinder. Put the throttle valve and the air barrier in a fully open position. Press the conical rubber head of the hand-held cylinder pressure gauge into the spark plug hole.

5. The engine cylinder pressure detection steps are as follows: preheat and stop the engine; remove the hood cover; disconnect the positive pole of the ignition system from the primary ignition coil so that it does not work, and insulate other wires with electrical tape so that they cannot contact the ground wire.