Turn off the engine and let it cool, then open the engine hood and find the generator belt in front of the engine.
2. Press the belt between the pulleys to check its tension. If pressed more than 1/2 inch, a loose belt will affect generator performance and even damage the generator. belt.
3. Remember the installation position of the car alternator belt and the applicable flexing sequence of each engine wheel.
4. Tighten the tension wheel with an adjustable wrench and press (loosen the generator adjustment bolt and adjust the pivot bolt).
5. Check the generator belt for oil or grease contamination, turn the belt over to check for cracks in the inner layer, missing rubber parts and slippage, if there are stains oil on the timing belt. , etc. (The picture shows the Changan On generatoruo. The belt passes through the distribution box).
6. Move the generator outward to loosen the belt (move the generator inward to loosen the belt).
7. Strip the generator belt from the pulley, then remove the generator belt.
8. Compare the removed old belt with the new belt and install the new belt after confirmation.
9. Press the belt with your hand and check the tightness of the belt (pull the generator outward until the belt is tight, ensure that the generator belt is installed in the appropriate position and strictly adjust the pivot according to the manufacturer's instructions (bolt).
10. Start the engine to check the results of the repair, and recheck the belt tightness after stopping the engine. p>
How to solve the problem of misfire in the three cylinders of the oldgl8 ?
1. Detonation, commonly known as cylinder knock and rod knock. Knocking is an abnormal combustion phenomenon produced during the engine combustion process. Simply put, “knocking” is a phenomenon of abnormal engine combustion. Knocking is a pressure abnormality in the combustion chamber caused by abnormal combustion. The engine will produce a knocking noise when knocking. The slightly discontinuous striking sound is quite clear, somewhat similar to the sound of a triangular iron being struck. In case of serious and continuous detonation, the engine will make a "beep-beep-beep" sound, and the engine will also be obviously weak at this time.
1. Irregular metallic knocking noises occur in the engine.
2. Engine vibration.
3. Engine temperature is too high.
4. Fuel combustion is incomplete and there is black smoke in the exhaust.
5. Engine power decreases.
6. Increased fuel consumption.
7. During normal driving, the speed changes suddenly and inexplicably.
2. Main reasons
1. The firing angle is too advanced: so that the piston obtains power immediately after entering the power stroke after the end of compression top dead center. , the piston usually reaches ignition before top dead center (because it takes some time between ignition and complete combustion). Ignition too early will cause most of the oil and gas to burn while the piston is still on the compression stroke. At that time, the unburned oil and gas will experience great pressure and spontaneously ignite, causing knocking.
2.Excessive carbon deposition in the engine:
Excessive carbon deposition in the combustion chamber of the engine will not only increase the compres ratesion (will generate high pressure), but will also generate high temperature hot spots on the surface of the carbon deposit. , which causes the engine to knock.
3. The engine temperature is too high:
If the engine is in too hot an environment and the intake temperature is too high, or if the engine cooling water circulation is poor, This will cause the engine to explode due to the high temperature.
4. Incorrect air-fuel ratio:
Too lean air-fuel mixture ratio will increase the combustion temperature, and increasing the combustion temperature will cause an increase in engine temperature, which is of course prone to blows.
5. The octane rating of the fuel is too low:
The octane rating is an indicator of the fuel's resistance to knocking. The higher the octane number, the stronger the knock resistance. . Engines with comp rateshigh pressure have high pressure in the combustion chamber. If a fuel with poor anti-knock properties is used, knocking will easily occur.
3. Detection and maintenance
1. Detect pressure changes in the engine combustion chamber; detect the vibration frequency of the engine cylinder;
2. Direct detection of pressure changes in the combustion chamber to detect engine vibration has higher measurement accuracy, but the sensor is difficult to install and has low durability. It is generally used in measuring instruments in practice. the applications are all indirect detection type.
3. The quickest and most effective way to eliminate knock is to retard the ignition advance angle and reduce the combustion pressure. Therefore, the working principle of the knock sensor is that when the engine knockse is detected, the ignition advance angle is delayed until ignition timing where knocking will not occur. When the engine is not knocking, spark advance is slowly restored.
Check the ignition device for proper operation, timing correction and material wear. Additionally, there may be significant carbon deposits in the engine, causing ignition and combustion difficulties. It is recommended to use Mafu Multi-Path high quality fuel additive to help improve fuel quality, promote complete combustion, clean the engine and. increase power.