If the oil pressure is lost, the warning light will light up, and continuing to drive will cause fatal harm to the engine.

Adjustment of oil pressure

Oil pumps are classified based on their stable oil discharge capacity, which means that the maximum pressure must be limited by a pressure reducing valve. If a pressure reducing valve is not used, the system pressure will rise to a dangerous level, which may cause engine damage.

The oil pressure reducing valve is composed of a valve or ball and a coil spring. The engine oil is sucked in through the filter and sent to the oil filter. When the fuel supply pressure increases with the engine speed, the pressure reducing valve opens. At this time, the engine oil enters the inlet side through a bypass from the outlet side to maintain the specified pressure. Due to the highly accurate stiffness value of the spring used on the pressure reducing valve, the maximum pressure of the oil pump can be guaranteed. If the stiffness of the spring increases, the oil pressure will also increase accordingly. But the oil discharge of the pump will not increase.

In addition, the following factors also affect the engine oil pressure:

1. The speed of the oil pump and the oil pressure increase with the acceleration of the speed;

2. The viscosity of the oil, the higher the viscosity of the oil, the higher the oil pressure;

3. The clearance between oil and bearings can hinder the pressure increase of the oil pump. When the bearing wears out, it is difficult to form appropriate pressure.