TRW Automotive Holdings Corporation is one of the leading suppliers of automotive
equipments on the planet. The company has announced the start of its dual stage
transmission pumps. It also goes on to say that they have found application in two major
European vehicle platforms.
This latest dual stage pump is the latest in innovative pump technology. TRW says that
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
that cools and lubricates the wet clutches with oil. The second stage is a high-pressure
pump that serves as a hydraulic pressure source to give motion to the clutches, shift forks
and other elements. Another advantage is that it utilises a single electric motor and pump
unlike many other products that do the same thing but with dual motors and pumps.
The pump functions 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, "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."