Patent ID: 7949461
Filing Date: 2011-05-24
Classification: F02D,F02N

Abstract:
1. An engine start control apparatus that performs control, upon satisfaction of a preset engine restart condition in an engine stop state, to inject a fuel from a fuel injection unit, which is attached to a specific cylinder stopping in an intake stroke, into an intake port of the specific cylinder and to implement first combustion in the specific cylinder on a start of an engine, said engine start control apparatus comprising: a detection unit that detects a piston stop position of the specific cylinder stopping in the intake stroke in the engine stop state; an engine restart condition judgment module that determines whether the preset engine restart condition is satisfied in the engine stop state; a fuel injection control module that, upon determination of satisfaction of the preset engine restart condition by said engine restart condition judgment module, specifies an amount of fuel, which is to be injected into the intake port of the specific cylinder stopping in the intake stroke, corresponding to the piston stop position detected by the detection unit, and controls the fuel injection unit to inject the specified amount of fuel into the intake port of the specific cylinder; and a misfire identification module that identifies whether the first combustion on the start of the engine results in a misfire, the misfire identification module identifying a misfire when a rotation speed of the engine does not reach a preset threshold value upon completion of a first expansion stroke of the specific cylinder, wherein upon identification of a misfire by said misfire identification module, said fuel injection control module estimates a remaining amount of fuel unconsumed for the first combustion, computes an amount of fuel, which is to be injected next time into the intake port of the specific cylinder stopping in the intake stroke in the engine stop state, from the estimated remaining amount of fuel, and controls the fuel injection unit to inject the computed amount of fuel into the intake port of the specific cylinder.