EHPS Steering Pump System

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EHPS Steering Pump System

 

 

EHPS, short for Electro-hydraulic Power Steering, is a technology that falls between traditional hydraulic power steering and pure electric power steering.

 

Traditional HPS: Its hydraulic pump is directly driven by the engine via a belt. As long as the engine is running, the pump operates continuously, consuming energy. This is one reason why the steering wheel is heaviest, and fuel consumption increases when traditional gasoline-powered cars are idling.

 

EHPS: It replaces the engine with a dedicated electric motor. This electric motor is specifically designed to drive the hydraulic pump, thereby generating hydraulic power steering.

 

 

Rated power (W)	3
Peak power (W)	7.5
Rated voltage ( VDC)	353
Controller voltage range(VDC)	400~700V(rated 500V)
Rated current (A)	8
Peak current(A)	20
No-load busbar current(A)	6
Rated torque (N.m)	19.1
Peak torque (N.m)	48
Cooling method	Natural cooling
Rated efficiency (%)	≥92%
Working temperature	-40℃~+85℃
Motor type	SVC position sensorless permanent magnet synchronous motor

 

 

 

 

(1) High energy efficiency: Provides energy on demand, significantly reducing energy consumption and improving the range of electric vehicles.

 

(2) Adjustable power assist characteristics: The power assist level can be flexibly set at different vehicle speeds via software, optimizing the driving experience.

 

(3) Good compatibility: Retains a mature hydraulic power assist structure, providing very strong and clear road feel assistance, especially suitable for heavier SUVs and commercial vehicles.

 

(4) Relatively low cost: Compared to pure electric EPS, EHPS may be more cost-effective for vehicles requiring significant power assist.

 

(5) Safety redundancy: Even if part of the electronic system fails, a certain amount of mechanical hydraulic power assist is still retained, ensuring high safety.

 

 

 

 

 

 

 

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