TRW Automotive to Supply Daimler with Enhanced Motor Pump Unit for Electrically Powered Hydraulic Steering
TRW Automotive Holdings Corp. will supply Daimler AG with a newly enhanced Motor Pump Unit as part of the Electrically Powered Hydraulic Steering system (EPHS) on selected new Mercedes-Benz models. The MPU delivers enhanced performance and environmental attributes when compared with conventional hydraulic solutions.
|TRW’s motor pump unit. Click to enlarge.|
With TRW’s motor pump unit, hydraulic assist is determined by the pump speed and controlled by a patented, brushless motor which provides assist only when it is needed. The system used on the various Mercedes models uses TRW’s newest high power motor pump assembly providing a hydraulic output power of up to 1,000 watts. Compared with traditional hydraulic power steering, the system also offers fuel savings of up to 0.29 L/100km and a reduction of carbon dioxide emissions of approximately 6 g/km.
TRW’s motor pump unit provides flexible tuning capability allowing the system to adapt to different driving conditions, providing a comfortable setting for parking and city driving, while delivering a safe and robust feel at higher speeds. There is also the option for EPHS to vary assist levels depending on the vehicle loading information provided by other vehicle subsystems.