In-cylinder injection type internal combustion engine

摘要

When an increase in a temperature of an exhaust-gas purifying catalyst device (30) in an in-cylinder injection type internal combustion engine (1) is demanded, a temperature-increase control means in an electronic control means (40) accomplishes stratified combustion by causing each fuel injection valve to inject fuel directly into the associated combustion chamber (8) in a compression stroke in such a way that the air-fuel ratio of the internal combustion engine (1) becomes the stoichiometric air-fuel ratio or an air fuel ratio in a vicinity of the stoichiometric air-fuel ratio. This can allow the temperature of the exhaust-gas purifying catalyst device (30) to be maintained or increased without increasing fuel consumption. <IMAGE>