Crowell & Moring LLP
High-pressure fuel pump control device and in-cylinder injection engine control device
A high-pressure fuel pump accelerates a rise in fuel pressure from engine start-up to shorten an engine start-up time, reduce an exhaust gas substance and improve or increase an engine output. The high-pressure fuel pump is part of a control device which controls an in-cylinder injection engine having a fuel injection valve, a high-pressure fuel pump, and a crank angle sensor. The high-pressure fuel pump is provided with a plunger for pressurizing the fuel placed in the high-pressure fuel pump, a pump drive cam, and a cam angle sensor. A drive signal setting device outputs drive signals to the high-pressure fuel pump at least two or more times from the time of crank angle sensor signal detection to the determination time of the crank and cam angle sensor phases.
Hitachi, Ltd.
F F F F F
F02D F02D F02D F02D F02M
additional inventional additional inventional inventional
Hiroyuki Takashi Asahiko Kosaku
Yamada Okamoto Otani Shimada