| US 7,516,730 B2 | ||
| Fuel pump control system for cylinder cut-off internal combustion engine | ||
| Asao Ukai, Wako (Japan); Toshitaka Hachiro, Wako (Japan); Tomohiro Nishi, Wako (Japan); and Takahiro Yonekura, Wako (Japan) | ||
| Assigned to Honda Motor Co., Ltd., Tokyo (Japan) | ||
| Filed on Mar. 21, 2007, as Appl. No. 11/723,585. | ||
| Application 11/723585 is a division of application No. 11/029341, filed on Jan. 06, 2005, granted, now 7,210,464. | ||
| Claims priority of application No. 2004-004697 (JP), filed on Jan. 09, 2004. | ||
| Prior Publication US 2007/0186909 A1, Aug. 16, 2007 | ||
| Int. Cl. F02M 37/04 (2006.01); F02D 13/06 (2006.01) | ||
| U.S. Cl. 123—198F [123/446; 123/481] | 6 Claims |
| 1. A system for controlling a fuel pump installed in a fuel supply line connected to a fuel tank of an internal combustion
engine having a plurality of cylinders and mounted on a vehicle, operation of the engine being switchable between cut-off-cylinder
operating mode during which some of the cylinders are non-operative and full-cylinder operating mode during which all of the
cylinders are operative, comprising:
a fuel injector connected to the fuel supply line and supplied with fuel pressurized by the fuel pump;
an engine operating mode discriminator discriminating whether the operation of the engine is in the full-cylinder operating
mode or in the cut-off-cylinder operating mode; and
a fuel pump controller controlling operation of the fuel pump based on the discriminated operating mode of the engine, the
fuel pump controller further comprising:
a first fuel injection amount calculator calculating a first fuel injection amount for the fuel injector installed at at least
one of the cylinders that is non-operative in the cut-off-cylinder operating mode; and
a second fuel injection amount calculator calculating a second fuel injection amount for the fuel injector installed at a
cylinder other than that is non-operative in the cut-off-cylinder operating mode,
wherein the fuel pump controller controls the operation of the fuel pump based on the first and second fuel injection amounts.
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