Yanmar Co., Ltd.

Tomohiro Ootani

Keiichiro Yuzaki

Gou Asai

A fuel injection control device for a diesel engine controls the first fuel injection timing so as to reduce the amount of white smoke generated in large amounts immediately after starting an engine. The fuel injection control device for the diesel engine comprises a high-pressure pump, a common rail for accumulating a highly-pressured fuel, injectors for injecting the fuel into a combustion chamber and a control means. Due to the fuel injection control device for the diesel engine, the fuel injection is performed after the cranking, without injecting the fuel for a certain period of time after an engine starting switch is turned on so that the pressure in the common rail becomes a set value.

Fuel injection control device for diesel engine

In a diesel engineequipped with a fuel injection devicehaving a fuel supply pumpfor pressingly sending a fuel, a common railfor accumulating the fuel pressingly sent from the fuel supply pump, injectorsfor injecting the fuel into a cylinder by an electronic control, a coolant water temperature sensorfor detecting an engine coolant water temperature and a fuel injection quantity map for calculating a target common rail pressure, total amount of injections, the number of multistage injection, the respective injection quantity and the respective injection quantity timing, the diesel enginecomprises a total injection quantity increasing means for increasing the total amount of injections in the injection quantity control arithmetic means and an injection number reduction avoidance means for avoiding that the number of multistage injections are changed by the total injection quantity increasing means when the engine is transferred to a cold state to a warming state.

Growing community of inventors

Osaka, Japan

Tomohiro Ootani