| US 7,591,239 B2 | ||
| High-pressure fuel pump control device for engine | ||
| Takashi Okamoto, Hitachinaka (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on Nov. 13, 2007, as Appl. No. 11/939,020. | ||
| Application 11/939020 is a continuation of application No. 11/755922, filed on May 31, 2007, granted, now 7,325,536. | ||
| Application 11/755922 is a continuation of application No. 11/008167, filed on Dec. 10, 2004, granted, now 7,240,666, filed on Jul. 10, 2007. | ||
| Claims priority of application No. 2003-415495 (JP), filed on Dec. 12, 2003. | ||
| Prior Publication US 2008/0262700 A1, Oct. 23, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. F02D 41/06 (2006.01) | ||
| U.S. Cl. 123—179.17 | 15 Claims |
| 1. A high-pressure fuel pump control device for an engine comprising:
a fuel injector valve for directly injecting fuel in a common rail into a combustion chamber; and
a high-pressure fuel pump for feeding the fuel under pressure to said common rail;
wherein said high-pressure fuel pump comprises:
a pressurization chamber;
a plunger for pressurizing fuel in said pressurization chamber;
a fuel passage valve disposed in said pressurization chamber; and
an actuator for actuating said fuel passage valve;
wherein said control device includes control means for executing output control of a drive signal for said actuator to vary
a discharge rate of said high-pressure fuel pump; and
wherein said control means starts outputting the actuator drive signal, during a period from operation start to a point in
time at which the actuator drive signal becomes able to issue in a predetermined crank angle phase, when a crank angle signal
has been recognized in excess of at least two times from the operation start.
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