Title:
METHOD FOR PROVIDING A CONTROLLED INJECTION RATE AND INJECTION PRESSURE IN A FUEL INJECTOR ASSEMBLY
Document Type and Number:
WIPO Patent Application WO2005054655
Kind Code:
B1
Abstract:
A method for controlling injection rate and injection pressure of an electromagnetic fuel injector assembly having a pressure balanced control valve including a solenoid and a valve member subject to the pressure developed by the injector and actuated by the solenoid to close the valve member against the biasing force of a spring. The control valve is supported in a valve bore in an injector body. The method includes the step of providing a first level of current to the solenoid for moving the valve member from an open to a closed position allowing the pressure in the injector to rise, providing a regulated current to the solenoid at preselected times during the injector event to unbalance the forces acting on the valve member thereby slightly unseating the valve member to regulate injection pressure and injection rate of the fuel injector, and ending solenoid current delivery thereby moving the valve member to its open position.
Inventors:
STRAUB ROBERT D (US)
Application Number:
PCT/US2004/039072
Publication Date:
August 24, 2006
Filing Date:
November 19, 2004
Export Citation:
Assignee:
BOSCH GMBH ROBERT (DE)
STRAUB ROBERT D (US)
STRAUB ROBERT D (US)
International Classes:
F02D1/06; F02M45/12; F02M59/46; F02M63/00; F02M57/02; F02M
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