JPS63138438U

JPS63138438U -

Info

Publication number: JPS63138438U
Application number: JP2990387U
Authority: JP
Priority date: 1987-03-03
Filing date: 1987-03-03
Publication date: 1988-09-12

Description

[Brief explanation of the drawing]

第１図は第２図の吐出量制御装置の拡大側面断
面図、第２図は加圧燃料供給制御装置の側面断面
図、第３図は第２図の―線に沿つてみた燃料
供給ポンプの断面図、第４図はデイーゼル機関の
全体図である。４０……燃料溢流通路、４１……燃料溢流室、
４２……溢流制御弁、４６……加圧ピストン、４
７……ピエゾ圧電素子、４８……加圧室、５０…
…加圧ピン、５４，５５，６０……燃料流出孔、
５６，６１，６７……逆止弁、６６……絞り通路
。 Fig. 1 is an enlarged side sectional view of the discharge amount control device in Fig. 2, Fig. 2 is a side sectional view of the pressurized fuel supply control device, and Fig. 3 is a fuel supply pump seen along the line - in Fig. 2. FIG. 4 is an overall view of the diesel engine. 40...Fuel overflow passage, 41...Fuel overflow chamber,
42... Overflow control valve, 46... Pressurizing piston, 4
7... Piezo piezoelectric element, 48... Pressurizing chamber, 50...
... Pressure pin, 54, 55, 60 ... Fuel outflow hole,
56, 61, 67... Check valve, 66... Throttle passage.

Claims

[Scope of utility model registration request]

A discharge amount control device that controls the discharge amount of the fuel supply pump by branching a fuel overflow passage from the pressurized fuel passage of the fuel supply pump and controlling the amount of fuel overflowing from the fuel overflow passage. , the fuel overflow passage is connected to the fuel overflow chamber via an overflow control valve, and includes a pressurized chamber whose volume is changed by a piezoelectric element and is filled with fuel, and the overflow control valve are arranged to open and close according to pressure changes in the pressurized chamber, and the fuel overflow chamber is arranged as a fuel outflow hole;
The fuel overflow hole is connected to the fuel outflow passage via a check valve that allows only the fuel flowing out of the fuel overflow chamber to pass through the fuel outflow hole, and the fuel overflow chamber has a smaller cross-sectional area than the fuel outflow hole. A discharge amount control device for a fuel supply pump connected to the pressurizing chamber via a throttle passage and a check valve that allows only the fuel flow flowing out from the fuel overflow chamber to pass through the throttle passage.