RU97108273A - HIGH PRESSURE FUEL PUMP - Google Patents

HIGH PRESSURE FUEL PUMP

Info

Publication number
RU97108273A
RU97108273A RU97108273/06A RU97108273A RU97108273A RU 97108273 A RU97108273 A RU 97108273A RU 97108273/06 A RU97108273/06 A RU 97108273/06A RU 97108273 A RU97108273 A RU 97108273A RU 97108273 A RU97108273 A RU 97108273A
Authority
RU
Russia
Prior art keywords
cavity
membrane
pressure
pump
drive mechanism
Prior art date
Application number
RU97108273/06A
Other languages
Russian (ru)
Other versions
RU2156881C2 (en
Inventor
Фельманн Вольфганг
Original Assignee
Роберт Бош Гмбх
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19531811A external-priority patent/DE19531811A1/en
Application filed by Роберт Бош Гмбх filed Critical Роберт Бош Гмбх
Publication of RU97108273A publication Critical patent/RU97108273A/en
Application granted granted Critical
Publication of RU2156881C2 publication Critical patent/RU2156881C2/en

Links

Claims (7)

1. Топливный насос высокого давления, в частности, распределительный топливный насос высокого давления, для двигателей внутреннего сгорания, содержащий по меньшей мере один плунжер (16), перемещаемый возвратно-поступательно и упирающийся торцом в рабочую камеру (17) насоса, приводной механизм (21), воздействующий на противоположный торец плунжера (16) и приводящий этот плунжер в возвратно-поступательное движение вдоль его оси, охватывающая приводной механизм (21) и заполненная смазочной жидкостью полость (22) приводного механизма, накопительная полость (29), отделенная от полости (22) подвижной стенкой (37) и заполненная топливом, из которой при всасывающих ходах плунжера (16) рабочая камера (17) насоса заполняется топливом и в которую в конце нагнетательного хода плунжера (16) выдается часть топлива, находящегося под давлением впрыска и нагнетаемого при нагнетательном ходе, причем давление топлива в накопительной полости (29) (накопительное давление) существенно превышает давление жидкости в полости (22) приводного механизма (смазочное давление), отличающийся тем, что в полости (22) установлена вакуумная камера (38), которая по меньшей мере частично образована мембраной (39, 40, 41) и находится под действием смазочного давления, и жесткость мембраны (39, 40, 41) подобрана таким образом, что она отклоняется в сторону вакуумной камеры (38) только при нагружении давлением, немного превышающим стационарное смазочное давление в полости (22) приводного механизма.1. A high pressure fuel pump, in particular a high pressure distribution fuel pump, for internal combustion engines, comprising at least one plunger (16) that moves reciprocally and abuts against the working chamber (17) of the pump, the drive mechanism (21 ), acting on the opposite end of the plunger (16) and causing this plunger to reciprocate along its axis, covering the drive mechanism (21) and the cavity (22) of the drive mechanism filled with lubricant, a cavity (29), separated from the cavity (22) by a movable wall (37) and filled with fuel, from which, at the suction strokes of the plunger (16), the working chamber (17) of the pump is filled with fuel and into which at the end of the discharge stroke of the plunger (16) a part fuel under injection pressure and injected during the injection stroke, the pressure of the fuel in the storage cavity (29) (storage pressure) significantly exceeding the liquid pressure in the cavity (22) of the drive mechanism (lubricating pressure), characterized in that in the cavity (22) setting on the vacuum chamber (38), which is at least partially formed by the membrane (39, 40, 41) and is under the influence of lubricating pressure, and the stiffness of the membrane (39, 40, 41) is selected so that it deviates towards the vacuum chamber ( 38) only when loading with a pressure slightly higher than the stationary lubricating pressure in the cavity (22) of the drive mechanism. 2. Насос по п. 1, отличающийся тем, что мембрана (39) образует вакуумную камеру (38) с подвижной стенкой (37) и прикреплена к подвижной стенке (37). 2. A pump according to claim 1, characterized in that the membrane (39) forms a vacuum chamber (38) with a movable wall (37) and is attached to the movable wall (37). 3. Насос по п. 2, отличающийся тем, что подвижная стенка (37) и мембрана (39) изготовлены из металла, а мембрана (39) припаяна к подвижной стенке (37). 3. The pump according to claim 2, characterized in that the movable wall (37) and the membrane (39) are made of metal, and the membrane (39) is soldered to the movable wall (37). 4. Насос по п. 1, отличающийся тем, что вакуумная камера (38) выполнена из совмещенных своими краями и прочно соединенных между собой тарелок (40,41), которые образуют единую мембранную коробку (42), содержащую две активные мембранные поверхности. 4. A pump according to claim 1, characterized in that the vacuum chamber (38) is made up of plates (40,41) combined with their edges and firmly interconnected, which form a single membrane box (42) containing two active membrane surfaces. 5. Насос по п. 4, отличающийся тем, что мембранная коробка (42) закреплена по краю на детали топливного насоса высокого давления. 5. A pump according to claim 4, characterized in that the diaphragm box (42) is fixed along the edge on the parts of the high pressure fuel pump. 6. Насос по п. 5, отличающийся тем, что деталь выполнена в виде подвижной стенки (37) между накопительной полостью (29) и полостью (22) приводного механизма. 6. A pump according to claim 5, characterized in that the part is made in the form of a movable wall (37) between the storage cavity (29) and the cavity (22) of the drive mechanism. 7. Насос по п. 4, отличающийся тем, что мембранная коробка (42) закреплена по краю между двумя деталями топливного насоса высокого давления. 7. A pump according to claim 4, characterized in that the membrane box (42) is fixed along the edge between the two parts of the high pressure fuel pump.
RU97108273/06A 1995-08-30 1996-03-29 High-pressure fuel-injection pump RU2156881C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19531811.0 1995-08-30
DE19531811A DE19531811A1 (en) 1995-08-30 1995-08-30 Fuel injection pump

Publications (2)

Publication Number Publication Date
RU97108273A true RU97108273A (en) 1999-04-27
RU2156881C2 RU2156881C2 (en) 2000-09-27

Family

ID=7770700

Family Applications (1)

Application Number Title Priority Date Filing Date
RU97108273/06A RU2156881C2 (en) 1995-08-30 1996-03-29 High-pressure fuel-injection pump

Country Status (6)

Country Link
US (1) US5794594A (en)
EP (1) EP0795083B1 (en)
JP (1) JPH10508358A (en)
DE (2) DE19531811A1 (en)
RU (1) RU2156881C2 (en)
WO (1) WO1997008454A1 (en)

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JP3180948B2 (en) * 1996-09-03 2001-07-03 株式会社ボッシュオートモーティブシステム Diaphragm type damper
DE19712872A1 (en) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Pump, in particular high-pressure pump for a fuel injection device of an internal combustion engine
JPH11132130A (en) * 1997-10-27 1999-05-18 Mitsubishi Electric Corp Cylinder injection type high pressure fuel pump
JP3471587B2 (en) * 1997-10-27 2003-12-02 三菱電機株式会社 High pressure fuel pump for in-cylinder injection
DE10362412B3 (en) * 2002-10-19 2017-09-07 Robert Bosch Gmbh Device for damping pressure pulsations in a fluid system, in particular in a fuel system of an internal combustion engine
DE10307877A1 (en) * 2003-02-25 2004-09-02 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
JP4036153B2 (en) * 2003-07-22 2008-01-23 株式会社日立製作所 Damper mechanism and high-pressure fuel supply pump
EP1731761B1 (en) * 2005-06-09 2007-07-11 THOMAS MAGNETE GmbH Dosing pump
JP4686501B2 (en) * 2007-05-21 2011-05-25 日立オートモティブシステムズ株式会社 Liquid pulsation damper mechanism and high-pressure fuel supply pump having liquid pulsation damper mechanism
DE102008043643A1 (en) * 2007-11-29 2009-06-04 Robert Bosch Gmbh Fuel injection system for an internal combustion engine with HC injector
JP5002523B2 (en) 2008-04-25 2012-08-15 日立オートモティブシステムズ株式会社 Fuel pressure pulsation reduction mechanism and high-pressure fuel supply pump for internal combustion engine equipped with the same
IT1396142B1 (en) * 2009-11-03 2012-11-16 Magneti Marelli Spa FUEL PUMP WITH DAMPENER PERFECTED FOR A DIRECT INJECTION SYSTEM
DE102011008467B4 (en) * 2011-01-13 2014-01-02 Continental Automotive Gmbh Injector with pressure compensation
DE102015219772A1 (en) * 2015-10-13 2016-10-06 Continental Automotive Gmbh Low-pressure damper and high-pressure fuel pump
US9897056B1 (en) 2016-11-22 2018-02-20 GM Global Technology Operations LLC Protective cover assembly for a fuel pump

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