Patent ID: 7188606
Filing Date: 2007-03-13
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A diesel engine comprising: an EGR (exhaust gas recirculation) valve; an intake throttle valve provided upstream of an EGR gas inlet portion in an intake channel; control means for controlling the EGR valve and the intake throttle valve; and intake air quantity detection means for detecting an intake air quantity upstream of an EGR gas inlet portion in the intake channel; wherein the diesel engine implements a premix combustion in which a fuel is injected earlier than a compression top dead center and ignited after the injection is completed at least in a prescribed operation region; and wherein the control means, at least in the operation region in which the premix combustion is implemented, determines a target intake air quantity necessary for igniting the fuel at a target timing based on an engine operation state and controls the intake throttle valve and the EGR valve so that the actual intake air quantity detected by the intake air quantity detection means matches the target intake air quantity.