INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To improve property of exhaust gas to be externally discharged and reliability of a secondary air supply device in an internal combustion engine which has an exhaust purification catalyst and the secondary air supply device.SOLUTION: An internal combustion engine has: a fuel injection valve which injects fuel into a cylinder; an exhaust purification catalyst; and a secondary air supply device which supplies air to an engine exhaust passage. In the internal combustion engine: first catalyst warming-up control delays ignition timing through stratified charge combustion; and second catalyst warming-up control supplies the air to the engine exhaust passage. Also, a first temperature range of engine cooling water when the first catalyst warming-up control is performed and a second temperature range of the engine cooling water when the second catalyst warming-up control is performed are set so that the second temperature range is included in the first temperature range.