Cause and Judgment Method of Oil Pump Failure
The oil pump is one of the main components in the fuel supply system. It can provide the necessary oil pressure and flow rate for the fuel supply system to meet the normal operation of the engine. Once the oil pump fails, it will cause engine power attenuation, insufficient fuel supply pressure and other abnormal phenomena, and eventually cause the engine to fail to work. Therefore, the diagnosis and treatment of oil pump failure is of great significance. In view of this, this paper will analyze in detail the causes and judgment methods of oil pump failure.
The causes of oil pump failure are mainly divided into two types, one is the external wear of the oil pump, and the other is the internal failures such as seizure, leakage, clogging and breakage.
1. External wear: When the total oil volume in the engine system decreases, it is easy to wear the contacting parts of the pump body, blade, rotor and other parts. The wear parts will expose metal powder and reduce the fitting clearance, which will cause the pump to work improperly, reduce output and even lead to pump failure.
2. Internal failure such as seizure, leakage, clogging, breakage: Due to poor oil quality or frequent start and stop of the engine, too much impurity or foreign matter in the oil will cause the oil pump internal parts to be stuck or broken, resulting in pump failure.
Methods of judging oil pump failure
1. With the engine running, use oil pressure gauge to observe the oil pressure of the oil pump. The normal oil pressure is usually 0.15 MPa, higher than 0.2 Mpa and lower than 0.1 Mpa. Such as oil pressure changes and other abnormalities, indicating that the oil pump may have failed.
2. Remove the pump cover to check the clearance between the pump body, blades and rotor. If the clearance is too small or the wear rate is too large, the pump must be replaced.
3. Disassemble the oil pump and check whether there are metal powder and wear marks on the wear parts.
4. If the oil pump fails, it is also necessary to check whether there is metal powder in the oil by checking the filter and oil circulation system. This can better determine whether the pump fails or other parts wear too much.
Conclusion
The failure of the oil pump will bring great losses to the engine, therefore, it is very important to diagnose and treat the oil pump failure promptly, so as to avoid serious consequences. The above is the detailed analysis of the causes and judgment methods of oil pump failure. Through the above analysis, we can better understand the causes and judgments of oil pump failure, and make corresponding treatments in time to reduce losses.
