July 28, 2008

Eaton Variable Displacement Ring Fuel Pump Improves Overall Fuel Efficiency, Operating Performance, Reliability And Reduces Life-Cycle Costs

IRVINE, California, July 28, 2008 - Diversified industrial manufacturer Eaton Corporation’s aerospace business’s Variable Displacement Ring Pump (VDRP) offers advanced generation fuel systems with pump and meter fuel flow capabilities providing an optimum combination of fuel savings, hardware robustness, reliability, thermal efficiency, controllability and lower life-cycle cost.

The VDRP has achieved an overall system efficiency improvement of 25 percent under the same cruise and idle decent conditions of traditional fuel pump systems. This performance advantage results in lower fuel system operating costs at an estimated savings of $37,000 per year per aircraft based on B737 performance results and $1M over the life of the aircraft at today’s fuel prices. In addition, the pumps performance also results in lower fuel system temperatures (up to 100F at idle descent), less parasitic input shaft power consumption (-15 Hp at cruise) and a better engine SFC.

For thermal performance, the VDRP offers a significant system benefit by producing only the flow and pressure demanded by the system. In the cruise and idle descent operating ranges, traditional gear pump fuel systems achieve approximately five percent overall system efficiency.

The VDRP also features a simple displacement control actuation mechanism that adjusts to the dynamic performance demands of the jet engine fuel system. The actuation system allows the VDRP to be more easily controlled in a closed-loop mode to responsively and more accurately meter engine burn flow. Low actuation force levels required by the VDRP mechanism also ensure rapid response and a more stable overall operation.

In the aerospace industry, Eaton is a leading supplier of hydraulic, electro-hydraulic pump and generator products and integrated systems; engine and airframe fuel pumps; electric motors; aircraft door actuation, flight and flow controls; fluid, fuel and air delivery products and systems; nose wheel steering systems; integrated control systems; cockpit controls and displays; power and load management systems; pressure sensors, seals, and fluid health monitoring products and systems. Eaton serves commercial and military aviation, aerospace, military weapons, marine and off-road markets worldwide.

Eaton Corporation is a diversified power management company with 2007 sales of $13 billion. Eaton is a global technology leader in electrical systems for power quality, distribution and control; hydraulics components, systems and services for industrial and mobile equipment; aerospace fuel, hydraulics and pneumatic systems for commercial and military use; and truck and automotive drivetrain and powertrain systems for performance, fuel economy and safety. Eaton has 81,000 employees and sells products to customers in more than 150 countries. For more information, visit