Hydraulic Pump

Hydraulic Pump





The hydraulic pump is a vane pump and is equipped with an electrically controllable valve for regulating the flow rate of the hydraulic fluid. This valve is called the Electrically Controlled Orifice (ECO).
The active front steering system can generate higher wheel angle speeds compared with conventional rack and pinion power steering systems. High hydraulic system flow rates must be maintained in the hydraulic system for the high wheel angle speeds. In order to deliver the needed hydraulic requirements, a larger power steering pump would need to be installed. However this would increase fuel consumption. An alternative would be to install a controllable hydraulic pump. A conventional pump with the added ECO valve has been installed on the E60.
The hydraulic pump with the ECO regulates the flow rate according to requirements and reduces the dynamic pressure in the steering system.