What happened to Wei Chai's low-speed oil return exceeding the limit?

Overlimit of low-speed oil return may be caused by the following reasons. First of all, it may be due to the wear or failure of internal parts of the engine, resulting in poor oil return. This may include piston ring wear, cylinder liner wear and excessive clearance between crankshaft and connecting rod bearing bushing. Secondly, the overrun of low-speed oil return may also be caused by insufficient oil supply or unstable oil supply pressure of the oil pump. This may be caused by insufficient oil supply due to the wear or blockage of internal parts of the oil pump, or by the failure of the oil pump adjustment or control system. In addition, it is also possible that the oil viscosity is too high or the oil system is blocked, which leads to poor oil return and affects the normal operation of low-speed oil return.

In order to solve the problem of low-speed oil return exceeding the limit, it is necessary to conduct a comprehensive inspection of the engine and determine the specific cause of the failure. If the problem is caused by the wear of parts, the corresponding parts need to be replaced or repaired in time. If the problem is caused by insufficient oil supply or unstable oil pump pressure, the oil pump and its control system need to be checked and repaired or adjusted. In addition, the engine oil should be changed regularly, and the engine oil that meets the specification requirements must be used to avoid the abnormal operation of oil return due to excessive viscosity of the engine oil or blockage of the oil circuit.

Extended content: the problem of low-speed oil return exceeding the limit will not only affect the normal work of the engine, but also lead to other problems. For example, excessive oil return may lead to foaming of engine oil, further affecting lubrication effect and aggravating parts wear; Or too little oil return, which may cause overheating of lubricating parts such as oil pump and even system failure. Therefore, it is very important to solve the problem of excessive low-speed oil return in time for the normal operation and life of the engine. At the same time, regular maintenance and inspection of the engine to ensure the normal operation of the lubrication system is also an important measure to prevent low-speed oil return from exceeding the limit.