Intake air control device i.e. microcontroller, for mixing recirculated exhaust gas into intake air of combustion chamber of diesel machine, has control device controlling combustion gas concentration when load is higher than preset value

摘要

The device (50) has a determining unit (51) for determining whether a load of a machine is higher than a preset value. A control device (52) controls concentration of combustion gas in an outer part of a combustion chamber (6) of the machine in a radial direction to be lower than concentration of the combustion gas in an inner part of the chamber in the radial direction when the determining unit determines that the load of the machine is higher than the value. An aperture (11) introduces the intake air into the chamber and produces eddy current in the intake air.