Patent ID: 8333067
Filing Date: 2012-12-18
Classification: F01N,F02D,F02M,Y02A,Y02T

Abstract:
1. An engine comprising: a cylinder including a combustion chamber; an exhaust port including an opening into the combustion chamber arranged to exhaust a combustion gas that is in the combustion chamber; an exhaust valve provided at the opening of the exhaust port and arranged to open the opening during a first time period and close the opening during a second time period; an air supply mechanism arranged to supply air to the exhaust port; and a controller programmed to control the air supply mechanism to, during the first time period, not supply air to the exhaust port until a lift amount of the exhaust valve reaches half a maximum value, and to supply air to the exhaust port during a predetermined time period after a point in time at which the lift amount of the exhaust valve reaches half the maximum value.