To obtain superior cold start-up performance and to improve fuel consumption and exhaust emission.
This spark ignition type cylinder injection type engine, which has a cylinder injecting injector 5 capable of directly injecting a required fuel into its combustion chamber 4, takes air into the combustion chamber 4, compresses the intake air with its piston 3, injects the fuel into a cylinder directly, and ignites and burns the fuel. In this engine, when a pressure detected by an injection pressure detecting means 15 is not less than an injectable set value at the time of a start, injection timing is controlled by the fuel injector 5 capable of changing the injection timing, such that a combustion mode becomes a stratified charge combustion mode until an engine speed detected by an engine speed detecting means 13 reaches to an ignition deciding set value. Until a temperature of cooling water reaches to a warming-up finishing set value after ignition, the injection timing is set in an intake stroke and is controlled by the fuel injector 5 such that the combustion mode becomes a homogeneous mode.
KOIKE MAKOTO
KOBAYASHI TATSUO
TOYOTA MOTOR CORP