US3926163A - Method and device for stopping an internal combustion engine with fuel injection in case of overspeed - Google Patents

Method and device for stopping an internal combustion engine with fuel injection in case of overspeed Download PDF

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Publication number
US3926163A
US3926163A US473940A US47394074A US3926163A US 3926163 A US3926163 A US 3926163A US 473940 A US473940 A US 473940A US 47394074 A US47394074 A US 47394074A US 3926163 A US3926163 A US 3926163A
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United States
Prior art keywords
piston
pump
gaseous fluid
chamber
tappet
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Expired - Lifetime
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US473940A
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English (en)
Inventor
Dirk Bastenhof
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MAN Energy Solutions France SAS
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Semt
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0205—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine
    • F02M63/021—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively for cutting-out pumps or injectors in case of abnormal operation of the engine or the injection apparatus, e.g. over-speed, break-down of fuel pumps or injectors ; for cutting-out pumps for stopping the engine by locking pump pistons

Definitions

  • ABSTRACT Method and device for stopping in case of overspeed an internal combustion engine having fuel injection pumps of the constant stroke, reciprocating piston type, in which a pad defines in the pump body two separate closed chambers, wherein a compressed inert gasis fed in the second chamber for separating the pump piston from its tappet and thereby stopping the injection pump.
  • the invention relates also to an emergency stop de vice for carrying out this method as well as to the various applications and uses thereof and to the systems, assemblies, apparatus, vehicles, engines, plants, equipments and installations fitted with such a device (see, e.g. French Pat. No. 2,120,400, corresponding to US. Pat. No. 3,750,640).
  • an overspeed-sensitive or overspeed-responsive triggering or tripping member or like release device opens a pressure-fluid supply valve for feeding one or several power cylinder actuators or like servomotors the pistons of which will act upon the control racks operating the injection pumps so as to stop or discontinue the fuel injection provided by all pumps.
  • a significant disadvantage of these devices is that they cannot work upon an accidental blockin'g or jamming of the rack or of the mechanical transmission, drive or gear connected between the power cylinders and the rack.
  • the invention therefore provides a process and a particularly simple device for stopping the fuel injection pumps in case of overspeed of the internal combustion engine, which are quite reliable and the cost price of which is relatively low.
  • the method of stopping in case of overspeed an internal combustion engine including fuel injection pumps of the constant strokereciprocating piston type and in which a bolster or pad Le, a hollow cylinder closed at one end sliding within the pump body and interposed between the piston and its operating tappet, push-rod or lifter defines within the pump body two separated closed chambers the first one of which contains the piston and the second or other one contains the tappet, is characterized in that it consists, in case of overspeed of the engine, in feeding a compressed gaseous fluid into said second chamber with a pressure high enough for disengaging and separating as known per se said bolster or pad hence said piston from said tappet and thereby stopping the corresponding injection pump.
  • a compressed fluid such as air or preferably an inert gas such as nitrogen or carbon dioxide is directly admitted inside of the pump body so as to cause the pressure of this gas to act upon the pad or bolster interposed between the pump piston and its operating tappet for separating the piston from the tappet and thereby cutting off or discontinuing the fuel injection by the pump involved.
  • the device for stopping, in case of overspeed, an in ternal combustion engine with fuel injection including injection pumps of the constant stroke-reciprocating piston type, in which the piston is separated from its operating tappet by a sliding pad or member defining within the pump body or casing a pair of separated closed chambers the first one of which houses the piston and the second one of which contains the tappet and is provided with a fuel drain or leakage recovering or collecting duct, is characterized according to the invention in that it comprises means enabling feeding into said second chamber a compressed fluid in case of overspeed of the engine with a pressure high enough for disengaging and separating in a manner known per se said pad hence said piston from said actuating tappet and thereby stopping each fuel injection pump.
  • the device according to the invention is therefore considerably simplified with respect to the known prior state of the art as it does no longer comprise power cylinders or ram actuators adapted to act upon the racks or upon a lever for separating the pump piston from its actuating tappet.
  • the compressed gaseous fluid feed means comprise a compressed gaseous fluid source or supply connected by an overspeed-sensitive triggering device or like overspeed-responsive release contrivance to said fuel leakage recovering duct within said second chamber.
  • the fuel leakage recovering duct is used to feed the compressed fluid into the inside of the pump body or casing.
  • the method and the device for stoppage according to the invention are therefore intended for use on internal combustion engines with fuel injection including fuel injection pumps 1 having a constant-stroke reciprocating piston 12.
  • This piston 12 is driven according to a translatory motion by means of a tappet or like lifter or pusher member 3 resting through a follower or like roller 4 on an operating cam 5.
  • a pad or member 6 which is a hollow cylinder closed at one end is slidably mounted within the body or casing 7 of the pump 1 and is interposed between the piston 12 and its operating tappet 3.
  • This pad or member thereby defines within the body or casing of the pump 1 a pair of separated closed chambers 8 and 9 the first one of which contains the piston 12 and the second one of which contains the tappet 3.
  • This second chamber is provided at its bottom portion with a fuel leakage recovering duct 10.
  • the piston 12 is also operatively or drivingly rotated by means of a gear or pinion 2 through a toothed rack 11 which is diagrammatically shown in cross-section and which enables adjustment of flow rate of the injected fuel through rotation of the piston 12 in a manner known per se.
  • the toothed rack. 11 is blocked or jammed in a position corresponding to the maximum flow rate of injected fuel, for various grounds, for instance in view of scoring or seizing or in the presence of dirt.
  • the engine exhibits a tendency to race and it becomes necessary to stop it forthwith by discontinuing the fuel injection.
  • the invention contemplated to feed a compressed gaseous, preferably inert fluid such as nitrogen or carbon dioxide, into the second chamber 9 containing the tappet, this compressed gas having a pressure high enough to overcome the opposing biasing force of the piston drawback or return spring 13 and thereby to fully disengage and separate the pad or member 6 of the piston.
  • the admission of compressed gaseous fluid into the chamber 9 is carried out very easily by means of the fuel leakage recovering duct or pipe 10 which is then connected to a source or supply of compressed air operated by an engine overspeed-sensitive triggering device 16.
  • the upper or top chamber 8 containing the piston 12 is advantageously provided with a means 17 for venting same to the outer atmosphere, such for instance as a calibrated safety valve, a check valve or a simple breather or snifting-valve so as to avoid the building up within this chamber 8 of too high a pressure caused by the compressed gaseous fluid leakages from the chamber 9 to this chamber 8.
  • a means 17 for venting same to the outer atmosphere such for instance as a calibrated safety valve, a check valve or a simple breather or snifting-valve
  • the device provided by the invention is therefore considerably simplified with respect to the known prior art and its operation is much more reliable.
  • the pad or member 6 used may thus be provided without communication holes or passageways between the chambers 8 and 9 as depicted in the drawings or it may be formed with thoroughfare holes extending therethrough and providing a communication between the chambers 8 and 9, these holes being provided with valves allowing passage of a compressed gaseous fluid from chamber 8 to chamber 9 only.
  • the invention is very easily applicable to previously known injection pumps.
  • a method of stoppingan internal combustion engine in case of overspeed, including fuel injection pumps of the constant-stroke, reciprocating piston type, each of said pumps comprising a pump body, having a pump cylinder and an intermediate cylinder adjacent to and in alignment with the pump cylinder, a pump piston in the pump cylinder, a drive tappet for driving said piston, an intermediate drive piston disposed in the intermediate cylinder between said pump piston and said drive tappet and being combined there with, said intermediate drive piston defining within said body a pair of separated closed chambers, a first one of which contains said pump piston and a second one of which contains said tappet, said method comprising a source of pressurized gaseous fluid sensing an engine overspeed condition, and feeding in response to the sensing of overspeed of the engine pressurized gaseous fluid from the source into the second chamber, the pressurized gaseous fluid having a pressure high enough when fed into the second chamber to urge the intermediate drive piston toward the first chamber and to disengage and separate the intermediate drive piston and thereby the pump piston from being driven by the drive tap
  • a device for stopping an internal combustion engine in case of overspeed including fuel injection pumps of the constant-stroke, reciprocating piston type, each of said pumps comprising a pump body, a piston, a drive tappet for driving the piston, a hollow cylinder closed at one end and slidably mounted within said pump body between said piston and said tappet and defining within said pump body a pair of separated closed chambers, a first one of which contains said piston and the second one of which contains said tappet, said device comprising a source of pressurized gaseous fluid, and means for providing a communication between said source and said second chamber for feeding said pressurized gaseous fluid into said second chamber, said gaseous fluid having a pressure high enough for disengaging and separating said hollow cylinder and thereby said piston from said drive tappet to thereby stop said injection pump.
  • a device wherein said second chamber has a fuel lead recovering duct extending from the interior to the exterior of the second chamber, valve means for connecting the duct to the source of pressurized gaseous fluid and an overspeed-sensitive triggering device connected to the valve means for releasing pressurized gaseous fluid into the duct in response to an overspeed condition.
  • said first chamber includes venting means for allowing the exhaust of pressurized gaseous fluid leaks flowing from said second chamber into said first chamber.
  • venting means is a check valve
  • venting means is a snifting-valve.
  • a device wherein said injection pump comprises a control toothed rack, and said venting means comprises grooves formed in said

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US473940A 1973-06-26 1974-05-28 Method and device for stopping an internal combustion engine with fuel injection in case of overspeed Expired - Lifetime US3926163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323380A FR2235291B1 (nl) 1973-06-26 1973-06-26

Publications (1)

Publication Number Publication Date
US3926163A true US3926163A (en) 1975-12-16

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ID=9121603

Family Applications (1)

Application Number Title Priority Date Filing Date
US473940A Expired - Lifetime US3926163A (en) 1973-06-26 1974-05-28 Method and device for stopping an internal combustion engine with fuel injection in case of overspeed

Country Status (19)

Country Link
US (1) US3926163A (nl)
JP (1) JPS5236574B2 (nl)
BE (1) BE815462A (nl)
BR (1) BR7404337D0 (nl)
CH (1) CH578122A5 (nl)
CS (1) CS204986B2 (nl)
DD (1) DD112675A5 (nl)
DK (1) DK139851B (nl)
ES (1) ES427009A1 (nl)
FI (1) FI56055C (nl)
FR (1) FR2235291B1 (nl)
GB (1) GB1458995A (nl)
IT (1) IT1027527B (nl)
NL (1) NL163302C (nl)
NO (1) NO146031C (nl)
PL (1) PL95421B1 (nl)
SE (1) SE404834B (nl)
SU (1) SU745376A3 (nl)
YU (1) YU37219B (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148289A (en) * 1977-05-31 1979-04-10 Hewitt John T Diesel engine control means
US4195610A (en) * 1977-09-23 1980-04-01 Societe D'etudes De Machines Thermiques S.E.M.T. Method and device for stopping a fuel-injection internal combustion engine in case of overspeed

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143463B2 (nl) * 1972-10-25 1976-11-22
US4323040A (en) * 1978-12-18 1982-04-06 Wytwornia Silnikow Wysokopreznych "Pzl-Andrychow" Protecting an internal combustion fuel injection engine from overspeeding
JPS5961518A (ja) * 1982-09-30 1984-04-07 Kawasaki Steel Corp 圧延機のロ−ル偏心量監視装置
DE8229382U1 (de) * 1982-10-20 1984-04-26 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Kolbenpumpe
JPS5992113A (ja) * 1982-11-15 1984-05-28 Nisshin Steel Co Ltd ロ−ル偏心制御装置
JPS59166314A (ja) * 1983-03-11 1984-09-19 Kawasaki Steel Corp タンデム圧延機の異常検出装置
JPS606215A (ja) * 1983-06-27 1985-01-12 Toshiba Corp ロ−ル偏芯除去装置
US5166353A (en) * 1989-04-28 1992-11-24 Adir Et Compagnie Benzothiazolinone compounds
DE4202396A1 (de) * 1992-01-29 1993-08-05 Man Nutzfahrzeuge Ag Einspritzvorrichtung fuer luftverdichtende brennkraftmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638053A (en) * 1949-01-13 1953-05-12 Cav Ltd Liquid fuel injection pump for internal-combustion engines
US3139762A (en) * 1960-06-24 1964-07-07 Magneti Marelli Spa Fluid pressure piston actuator
US3638628A (en) * 1970-09-18 1972-02-01 Henry Stanford Stolworthy Fuel control assembly for internal combustion engines having fuel injectors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638053A (en) * 1949-01-13 1953-05-12 Cav Ltd Liquid fuel injection pump for internal-combustion engines
US3139762A (en) * 1960-06-24 1964-07-07 Magneti Marelli Spa Fluid pressure piston actuator
US3638628A (en) * 1970-09-18 1972-02-01 Henry Stanford Stolworthy Fuel control assembly for internal combustion engines having fuel injectors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4148289A (en) * 1977-05-31 1979-04-10 Hewitt John T Diesel engine control means
US4195610A (en) * 1977-09-23 1980-04-01 Societe D'etudes De Machines Thermiques S.E.M.T. Method and device for stopping a fuel-injection internal combustion engine in case of overspeed

Also Published As

Publication number Publication date
NO146031B (no) 1982-04-05
DE2429689B2 (de) 1975-10-02
DK139851C (nl) 1979-10-08
DK334474A (nl) 1975-02-10
SE7407906L (nl) 1974-12-27
JPS5236574B2 (nl) 1977-09-16
SU745376A3 (ru) 1980-06-30
CH578122A5 (nl) 1976-07-30
IT1027527B (it) 1978-12-20
FR2235291A1 (nl) 1975-01-24
GB1458995A (en) 1976-12-22
DE2429689A1 (de) 1975-01-23
YU179274A (en) 1982-06-18
CS204986B2 (en) 1981-04-30
NL163302B (nl) 1980-03-17
NL163302C (nl) 1980-08-15
NO146031C (no) 1982-07-14
FR2235291B1 (nl) 1977-09-16
NO742211L (nl) 1975-01-20
ES427009A1 (es) 1976-07-16
JPS5036828A (nl) 1975-04-07
YU37219B (en) 1984-08-31
FI56055C (fi) 1979-11-12
BR7404337D0 (pt) 1975-01-07
FI194974A (nl) 1974-12-27
NL7408583A (nl) 1974-12-30
DD112675A5 (nl) 1975-04-20
SE404834B (sv) 1978-10-30
FI56055B (fi) 1979-07-31
BE815462A (fr) 1974-09-16
DK139851B (da) 1979-04-30
PL95421B1 (pl) 1977-10-31
AU6947074A (en) 1975-12-04

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