7.2.3.2 Power Steering Pump Assembly
Working Principle
Flow Control Orifice
FE07-1007b
Power steering pump is a blade power steering pump and its
working principle is as shown in the graphic. The engine
rotating torque is delivered through the drive belt to the power
steering pump belt drive assembly and rotates the power
steering pump assembly drive shaft and the rotor. Blades
installed on the rotor are thrown out due to the centrifugal force,
rotate close to the pump ring (rear pump housing) wall, draw
the steering fluid from the fluid reservoir to the pump chamber,
and press the fluid through the flow control valve to the steering
gear, provide power steering hydraulic assistance.
Flow control valve regulates the steering gear fluid flow based
on the system fluid pressure. adjust the system fluid pressure.
Prevent the system hydraulic pressure being too high.
7-8
Hydraulic Power Steering System
Steering System
EC718/EC718RV EC715/EC715RV 10/2009
Summary of Contents for EC715 2009
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