Patent ID: 6892694

Claim:
A start-up control device of a direct injection engine which performs an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke in succession, comprising: a fuel injector for injecting fuel into the engine; a throttle valve for regulating an intake air flow rate of the engine; a crank angle sensor for detecting a rotational position of a crankshaft of the engine and determining the stroke of the engine; a switch which signals engine start-up; and a controller which receives signals from the crank angle sensor and the switch, and controls the fuel injector, wherein the controller is programmed to: determine the presence of a learned value for calculating on the basis thereof a fuel injection amount during start-up of the engine by means of a stratified charge combustion operation; calculate the fuel injection amount on the basis of the learned value when the learned value is present, and control the fuel injector to inject fuel in the compression stroke to start up the engine by means of a stratified charge combustion operation; and control the fuel injector to inject fuel in the intake stroke of the engine to start up the engine by means of a homogeneous combustion operation when the learned value is absent, and obtain and store the learned value during the homogeneous combustion operation of the engine.