Title:
ULTRASONIC UNITIZED FUEL INJECTOR WITH CERAMIC VALVE BODY
Document Type and Number:
WIPO Patent Application WO2002048541
Kind Code:
A3
Abstract:
An ultrasonic fuel injector (30) for injecting a pressurized liquid fuel into the combustion chamber of an internal combustion engine that uses an overhead cam (27) for actuating the injector includes a valve body (33) having an injector needle (36) disposed therein forming a needle valve to meter the flow of fuel through the injector. The valve body (33) is formed of ceramic material that is transparent to magnetic fields changing at ultrasonic frequencies. The injector needle (36) includes a magnetostrictive portion disposed in the region of the valve body that is surrounded by a wire coil wound around the outside surface of the ceramic valve body. The wire coil is connected to a source of electric power that oscillates at ultrasonic frequencies. A sensor (51) is configured to signal when the overhead cam is actuating the injector to inject fuel into the combustion chamber of the engine. The sensor is connected to a control (47) that is connected to the power source (46) and is configured to operate same only when the overhead cam (27) is actuating the injector to inject fuel into the combustion chamber of the engine.
Inventors:
JAMESON LEE KIRBY
COHEN BERNARD
GIPSON LAMAR HEATH
COHEN BERNARD
GIPSON LAMAR HEATH
Application Number:
PCT/US2001/046988
Publication Date:
August 22, 2002
Filing Date:
December 06, 2001
Export Citation:
Assignee:
KIMBERLY CLARK CO (US)
International Classes:
F02M69/00; F02M57/02; F02M61/16; F02M61/20; F02M69/04; (IPC1-7): F02M69/04; F02M57/02; F02M61/16
Foreign References:
| US4475515A | 1984-10-09 | |||
| EP0856654A1 | 1998-08-05 | |||
| GB2327982A | 1999-02-10 | |||
| JPH0443854A | 1992-02-13 | |||
| US5803106A | 1998-09-08 |
Other References:
See also references of EP 1342007A2
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