Internal-combustion engines – Charge forming device – With fuel pump
Reexamination Certificate
2006-10-18
2009-08-04
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Charge forming device
With fuel pump
C123S446000
Reexamination Certificate
active
07568469
ABSTRACT:
A high pressure fuel supply system includes: a high pressure fuel pump having a normally closed electromagnetic valve; and a controller for calculating a valve open signal and a valve close signal for the electromagnetic valve in accordance with a state amount of an engine, and supplying a drive current to the electromagnetic valve, wherein the controller applies and the valve close signal having a time duration shorter than a valve close response time during a valve open period of the electromagnetic valve, the valve close response time being a time taken to close the electromagnetic valve after the valve close signal is applied. The controller applies alternately and periodically the valve close signal and valve open signal during the valve open period of the electromagnetic valve.
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Tokuo Kenichiro
Usui Satoshi
Yamada Hiroyuki
Cronin Stephen K
Crowell & Morin gLLP
Hitachi , Ltd.
Hufty J. Page
LandOfFree
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