Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-02-24
2008-12-09
Cronin, Stephen K. (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S478000
Reexamination Certificate
active
07461634
ABSTRACT:
A pressure boosting unit (110) is provided in each fuel injection valve of an engine (1). A pressure of fuel to be supplied to the fuel injection valve from a common rail (3) is boosted as required. An ECU (20) causes low pressure injection to be performed with the pressure boosting unit110being in a non-operated state, and high pressure injection to be performed with the pressure boosting unit (110) being in an operated state, and the pressure of the fuel being maintained at a boosted pressure. Based on the result, the ECU (20) corrects a fuel injection period of the fuel injection valve. Also, after the correction of the fuel injection period is completed, fuel injection is performed before the pressure of the fuel reaches the boosted pressure after the pressure boosting unit starts to be operated. Based on the result, operation starting timing of the pressure boosting unit is adjusted.
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Hotta Yoshihiro
Kawamura Kiyomi
Nakakita Kiyomi
Sakata Ichiro
Wakisaka Yoshifumi
Castro Arnold
Cronin Stephen K.
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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