What is a power steering pump



1, the power steering pump is the power source of the hydraulic power steering system, it through the engine as a transmission medium, the mechanical energy into hydraulic energy, the steering device through the oil pump output hydraulic energy into mechanical energy, thereby reducing the driver's operating strength, improve the vehicle maneuverability; .

2, control the internal pressure of the power steering pipeline through the pressure safety valve to ensure the safety of the steering system; 3. Control the flow of the steering system through the flow control valve to ensure the steering feel of the driver when the vehicle is driving at high speed


1, from the matching model points, can be divided into: commercial vehicle steering pump and passenger car steering pump.

2, from the structural form, can be divided into: vane type steering pump, gear type steering pump, plunger type steering pump; The double-acting vane steering pump is widely used in various models because of its small size, low noise and high volumetric efficiency.

3, from the driving form, it can be divided into: gear driven steering pump, pulley driven steering pump, cross slide key (spline) steering pump; Among them, the pulley drive steering pump is mainly used to drive passenger cars with small torque, and it is more common in the gear drive type and cross slide key type on commercial vehicles.


At present, the steering pump used in automobile is mostly double-acting vane type steering pump, which is mainly composed of ordinary double-acting vane pump, flow control valve and pressure relief valve. Double acting vane pump provides high pressure oil, flow control valve to ensure that the steering pump output suitable for the vehicle needs of the flow, pressure safety valve to control the highest output pressure of the steering pump, for gasoline engines with small engine power, should also be equipped with a pressure switch.