Patent ID: 7980232
Filing Date: 2011-07-19
Classification: F02B,F02M,Y02T

Abstract:
1. A four stroke internal combustion engine, comprising: a combustion chamber; a combustion chamber defining section which defines the combustion chamber; an intake passage which opens into the combustion chamber; an exhaust passage which opens into the combustion chamber; an intake valve which opens and closes a combustion chamber side opening of the intake passage; and an exhaust valve which opens and closes a combustion chamber side opening of the exhaust passage, wherein the combustion chamber defining section has a gas reserving chamber which communicates with the exhaust passage and is configured to reserve burned gas discharged from the combustion chamber; wherein the burned gas flows into the gas reserving chamber while the exhaust valve is opened in an expansion stroke or an exhaust stroke; and wherein the burned gas reserved in the gas reserving chamber is discharged to the combustion chamber while the exhaust valve is opened in an intake stroke.