Fuel injection timing control device for diesel engine

摘要

In a fuel injection timing control device for a diesel engine, a timer piston 39 having a low pressure chamber 39a communicating with the upstream side of a feed pump 23 and a high pressure chamber 39b communicating with a pump chamber 26 on the discharge side of the feed pump 23 controls the fuel injection timing by a pump plunger 31. A bypass passageway 42 establishes communication between the low pressure chamber 39a and the high pressure chamber 39b of the timer piston 39. A control valve 43 opens and closes the bypass passageway 42. When an engine 12 is stopped, a fuel injection timing changing means 17 opens the bypass passageway 42 by means of the control valve 43 to allow the low pressure chamber 39a and the high pressure chamber 39b of the timer piston 39 to communicate with each other for a predetermined time. Thus, the fuel injection timing by the pump plunger 31 is changed to the injection timing position at starting. IMAGE