TRW Launches Dual Stage Transmission Oil Pumps

LIVONIA, Mich. – TRW Automotive Holdings Corp. (NYSE:TRW) has announced that it has started production of its dual stage pump technology across two major European vehicle platforms.

The dual stage pump is TRW's latest innovation in pump technology. It is highly suitable for wet dual clutch transmissions due to its ability to integrate two external gear pumps in a compact single housing. The first stage is a low-pressure pump which cools and lubricates the wet clutches with oil. The second stage is a high-pressure pump that serves as a hydraulic pressure source to actuate the clutches, shift forks and other elements.

An electric motor runs the pump at variable speeds, operating only on-demand and reducing viscous friction losses, leading to a highly efficient solution.

Gregor Eipert, global sales lead for TRW's Transmission Motor Pump Unit business commented: "TRW has been working on the integration of electric motors, pumps and electronics for many years and has produced millions of highly integrated motor pump units for various applications.

"By using sintering technologies, the TRW dual stage pump offers an efficient and cost effective solution for state-of-the-art dual wet clutch transmissions. Our customers also benefit from the integrated dual stage pump which utilizes just one pump and one electric motor to provide the same functionality as comparable systems which need two pumps and two electric motors."

TRW has produced over 40 million pumps to date, including eight million transmission oil pumps. The company has proven experience with different liquid formulations for powertrain, drivetrain and transmission applications and can offer the full range of pumps, from low to high pressure applications (0 - 200 bar). TRW continues to innovate in this area and new pump developments are underway such as variable displacement pumps with either an external gear or pendular design.

About TRW

With 2014 sales of $17.5 billion, TRW Automotive ranks among the world's leading automotive suppliers. Headquartered in Livonia, Michigan, USA, the Company, through its subsidiaries, operates in 24 countries and employs approximately 65,000 people worldwide.  TRW Automotive products include integrated vehicle control and driver assist systems, braking systems, steering systems, suspension systems, occupant safety systems (seat belts and airbags), electronics, fastening systems and aftermarket replacement parts and services.  All references to "TRW Automotive", "TRW" or the "Company" in this press release refer to TRW Automotive Holdings Corp. and its subsidiaries, unless otherwise indicated.  TRW Automotive news is available on the internet at


TRW Automotive Holdings Corp.


Louise Colledge

TRW Automotive

(44) 121.506.5317

John Wilkerson

TRW Automotive

(734) 855-3864

Web Site:

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