Patent ID: 7210464
Filing Date: 2007-05-01
Classification: F02D,F02M

Abstract:
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, wherein the fuel pump controller comprises: and wherein the fuel pump controller controls the operation of the fuel pump such that the delivery flow rate of the fuel pump is increased or reduced based on a result of the comparison.