Direct injection type internal combustion engine

A direct injection type internal combustion engine comprising:

• an electromagnetic type variable valve mechanism in which an opening and closing timing of an intake valve and an exhaust valve is enable to control regardless to a rotation number;
• an opening and closing valve for shutting off an intake air passage for introducing air into a cylinder, cylinder;
• and
• a communication passage for communicating said intake air passage of adjacent cylinders;
• thereby an intake stroke time of one cylinder, compression air of said adjacent cylinders is flown through one of said communication passages.

A control method of an intake air passage of an internal combustion engine, wherein

• during said starting time, supplying said air into a cylinder through an intake valve from an intake air passage having a small cross-section;
• and
• generating a tumble flow into said cylinder;
• and
• after a warming-up of said engine, increasing said cross-section area of said intake air passage than a cross-section area of said starting time.

An air supply method of an internal combustion engine, wherein

• during a starting time, supplying said air into a cylinder through an intake valve from a first intake air passage having a small cross-section area;
• generating a tumble flow into said cylinder;
• after a warming-up of said engine, supplying said air into said cylinder through an intake valve from a main intake air passage which is divided into an upper state and a lower stage;
• and
• in a stratification operation region, generating said tumble flow into said cylinder by closing a lower side passage of said main intake air passage.

A direct injection type internal combustion engine comprising:

• a fuel injector for injecting directly a fuel into a combustion chamber;
• an ignition coil for igniting an air-fuel mixture of said combustion chamber;
• and
• an air-fuel mixture induction device for forming an air-fuel mixture region which enable to easily spark at a vicinity of said ignition plug during a starting of said internal combustion engine.

A direct injection type internal combustion engine, wherein

• an air and fuel mixture induction device for inducing a mixture of an air and a fuel in a surrounding portion of an ignition plug in a cylinder by operating immediately after an operation of a starting switch of said internal combustion engine is provided;
• and
• said air and fuel mixture induction device functions to a cylinder which enters firstly to an intake stroke after at least an operation of said starting switch;
• and
• said air and fuel mixture is induced to said surrounding portion of said ignition plug in said cylinder.