摘要 |
It is an object of the present invention to provide a diesel engine comprising an EGR valve (7), an intake throttle valve (13), a control unit (19) for controlling those EGR valve (7) and intake throttle valve (13), and a detection unit (11) for detecting the intake air quantity upstream of an EGR gas inlet portion, the diesel engine implementing a premix combustion at least in the prescribed operation region. The control unit (19), at least in the operation region in which the premix combustion is implemented, determines a target intake air quantity necessary for igniting the gas mixture at the target timing based on the engine operation state and controls the intake throttle valve (13) and/or EGR valve (7) so that the actual intake air quantity detected by the detection unit (11) matches the target intake air quantity. As a result, the ignition timing of the fuel in premix combustion can be easily and optimally controlled. |