Abstract: A diesel engine system includes a diesel engine, a throttle valve, an EGR (Exhaust Gas Recirculation) path, an EGR valve and a controller. The throttle valve controls a flow rate of intake air to the diesel engine. Exhaust gas is recirculated along the EGR path from an exhaust port to an intake port of the diesel engine. The EGR valve controls a flow rate of the exhaust gas. The controller controls the throttle valve and the EGR valve such that an opening of the throttle valve decreases and an opening of the EGR valve increases when a load of the diesel engine increases. The controller controls the EGR valve such that the opening of the EGR valve increases after the opening of the EGR valve is held constant for a first predetermined holding time.

Abstract: A diesel engine system includes a diesel engine, a throttle valve, an EGR (Exhaust Gas Recirculation) path, an EGR valve and a controller. The throttle valve controls a flow rate of intake air to the diesel engine. Exhaust gas is recirculated along the EGR path from an exhaust port to an intake port of the diesel engine. The EGR valve controls a flow rate of the exhaust gas. The controller controls the throttle valve and the EGR valve such that an opening of the throttle valve decreases and an opening of the EGR valve increases when a load of the diesel engine increases. The controller controls the EGR valve such that the opening of the EGR valve increases after the opening of the EGR valve is held constant for a first predetermined holding time.

Abstract: A control device for an engine, which includes a plurality of cylinders, an electronically controlled unit injector for injecting fuel into each cylinder, and an electronically controlled valve train for opening and closing an intake valve and an exhaust valve of each cylinder, comprises an operating state detection unit for detecting the operating state of the engine, and electronic control units for performing an idle cut operation, in which fuel injection into some of the cylinders is stopped, and the intake valve and the exhaust valve of the cylinder concerned are kept closed, if the signal switching time is long when the idling of the engine of a vehicle waiting at traffic lights is detected by the operating state detection unit.

Abstract: A control device for an engine, which includes a plurality of cylinders, an electronically controlled unit injector for injecting fuel into each cylinder, and an electronically controlled valve train for opening and closing an intake valve and an exhaust valve of each cylinder, comprises operating state detection means for detecting the operating state of the engine, and electronic control units for performing an idle cut operation, in which fuel injection into some of the cylinders is stopped, and the intake valve and the exhaust valve of the cylinder concerned are kept closed, if the signal switching time is long when the idling of the engine of a vehicle waiting at traffic lights is detected by the operating state detection means.