EP0509261B1 - Notabstellvorrichtung für eine Brennkraftmaschine - Google Patents

Notabstellvorrichtung für eine Brennkraftmaschine Download PDF

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Publication number
EP0509261B1
EP0509261B1 EP92104730A EP92104730A EP0509261B1 EP 0509261 B1 EP0509261 B1 EP 0509261B1 EP 92104730 A EP92104730 A EP 92104730A EP 92104730 A EP92104730 A EP 92104730A EP 0509261 B1 EP0509261 B1 EP 0509261B1
Authority
EP
European Patent Office
Prior art keywords
coupling
shaft
control
control element
actuating rod
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP92104730A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0509261A3 (en
EP0509261A2 (de
Inventor
Dietrich Koch
Horst Gunter Liebhart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen GmbH
MTU Motoren und Turbinen Union Friedrichshafen GmbH
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
Application filed by MTU Friedrichshafen GmbH, MTU Motoren und Turbinen Union Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP0509261A2 publication Critical patent/EP0509261A2/de
Publication of EP0509261A3 publication Critical patent/EP0509261A3/de
Application granted granted Critical
Publication of EP0509261B1 publication Critical patent/EP0509261B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02M63/022—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 acting on fuel control mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0255—Arrangements; Control features; Details thereof with means for correcting throttle position, e.g. throttle cable of variable length

Definitions

  • the invention relates to an emergency shutdown device for an internal combustion engine according to the preamble of claim 1, in which, in the event of a malfunction, an actuator-independent resetting of the control rod of an injection pump to zero delivery is possible.
  • a device is known for example from DE 39 23 123 C1.
  • the actuator-independent resetting of the control rod in the event of a malfunction is made possible in the device according to DE 39 23 123 C1 by a clutch which transmits the actuating movements of the actuator like a fixed connection to the control rod in normal operation, and is released in the event of a malfunction, so that an emergency shutdown of the Internal combustion engine can be done by a dedicated actuator.
  • the coupling is designed with spherical bodies as locking elements that engage in recesses of an actuator-side and a control-rod-side shaft section during normal operation and connect them in a torsionally rigid manner.
  • the shaft sections are held in an axial position corresponding to a locking position by an electromagnet.
  • a design-related disadvantage is also that the actuating forces are transmitted from the piston to the cylinder forming the guide for the piston in the guide surfaces. Since the displaceability of the piston must be ensured, a not too tight fit for the piston must be provided, but this will be noticeable as an undesirable play in the transmission path between the control shaft and control rod.
  • DE-GM 72 39 402 shows a hydraulically operated emergency shutdown device.
  • the control rod By supplying pressure medium to an actuating piston that is directly connected to the control rod, the control rod is adjusted to zero delivery in the event of a fault.
  • the control rod In normal operation of the internal combustion engine, the control rod is held in a position corresponding to fuel delivery by the injection pump by means of a compression spring acting on the actuating piston. Further mechanical intermediate rods are avoided.
  • such a simple design of the device is only possible because only two control positions are provided, with a fixed delivery rate in normal operation, which can be adjusted by means of a regulating screw, and a stop position.
  • the invention has for its object to provide a generic emergency shutdown device for internal combustion engines for actuator-independent resetting of the control rod of an injection pump to zero delivery so that the installation of this device in the regulating linkage for filling control does not require any additional power requirement of the actuator in normal operation of the internal combustion engine, which enables good control quality , the use of simple components for clutch and actuators allows a simple construction.
  • the actuating impulses are transmitted via a rotatably mounted shaft which contains a clutch which can be released in the event of a fault by means of an axial piston which can be pressurized in the longitudinal axis.
  • a spring which also acts in the longitudinal axis of the shaft. Since the spring does not generate any torque on the shaft during normal operation, the servomotor operates freely in the direction of filling and filling withdrawal. The power requirement of the The servomotor is therefore not increased due to the installation of the emergency shutdown device.
  • the actuator only has to overcome frictional resistances and the pressure forces acting on the piston of the injection pump.
  • the shaft section connected to the control rod is reset to zero delivery in a simple manner by means of a rotary piston which can be pressurized. Due to the design with a rotatable shaft and the hydraulic actuation of the clutch and the hydraulic reset in the event of a malfunction, a simple design with a simple clutch is possible, which can be designed without play. For example, a design of the coupling elements with wedge-shaped claws is advantageous here.
  • the actuator-side shaft section is furthermore designed with a sleeve which is coupled in a torsionally rigid manner to a shaft which is connected to the axial piston, the spring in the sleeve is arranged and is biased against the shaft.
  • the shaft can be moved axially against the sleeve.
  • the emergency stop device essentially consists of a rotatably mounted shaft 3 comprising two shaft sections 4 and 5, which are connected to one another by a coupling 9.
  • the actuator 1 for example an electric servomotor, is connected to the shaft 3 via a linkage 2, and the control rod 7 is connected to the shaft 3 via the linkage 8.
  • the shaft sections 4 and 5 are rotatably supported in ball bearings 12, 13 and a needle bearing 14.
  • the ball bearing 13 also absorbs the axial forces that occur.
  • the actuator-side shaft section 4 is formed with a sleeve 16, in which a spring 17 biased under pressure is arranged, which acts on a shaft 15 which is guided in the sleeve 16. The guidance permits axial displacements of the shaft 15 in the sleeve 16.
  • the shaft 15 and the sleeve 16 are, however, torsionally rigid, for example connected to one another via a transverse pin 28, which is guided, for example, in the shaft 15 in an elongated hole.
  • the claws 10 of one coupling half are arranged, which engage in the claws 11 of the other coupling half of the shaft section 5 on the control rod side.
  • a pressure chamber 19 is provided, to which pressure medium, preferably lubricating oil of the internal combustion engine, is fed in the event of a fault via a line 27 and a valve 18.
  • the coupling half connected to the shaft 15 is at the same time designed as an axial piston 20, which adjoins the pressure chamber 19, as can be seen in FIG. 1.
  • a further pressure chamber 22, shown in FIG. 2, is formed on the control rod-side shaft section 5, to which pressure medium reaches via a connecting line 21 and an inlet bore 25, which acts on the rotary vanes 23 of a rotary piston 24, which is arranged on the control rod-side shaft section 5.
  • the chambers located on the rear of the rotary vanes 23 each have ventilation bores 26.
  • the connecting line 21 to the pressure chamber 22 is only released when the coupling between the shaft sections 4 and 5 is released.
  • the connecting line 21 is connected to a Outlet bore of the pressure chamber 19 connected, which is covered by the outer surface of the axial piston 20 during normal operation of the internal combustion engine. It is only released when the axial piston 20 is in a position corresponding to a released position of the clutch 9.
  • the two halves of the coupling 9, which are assigned to the two shaft sections 4 and 5, are held against one another by the spring 17, so that the actuating movements of the actuator 1 are transmitted to the control rod 7 without play. Since the spring 17 acts in the longitudinal direction of the shaft and does not exert any torque on the shaft 3, the power consumption of the actuator is not influenced by the installation of the emergency shutdown device. At the same time, the control quality is improved because the actuating forces are small and the control conditions are symmetrical. In the event of a malfunction, for example when regulation due to a defect in the actuator is no longer possible, the valve 18 is activated so that pressure medium, preferably engine lubricating oil, reaches the pressure chamber 19 via the line 27.
  • pressure medium preferably engine lubricating oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Actuator (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Valve Device For Special Equipments (AREA)
EP92104730A 1991-04-18 1992-03-19 Notabstellvorrichtung für eine Brennkraftmaschine Expired - Lifetime EP0509261B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112689A DE4112689C1 (es) 1991-04-18 1991-04-18
DE4112689 1991-04-18

Publications (3)

Publication Number Publication Date
EP0509261A2 EP0509261A2 (de) 1992-10-21
EP0509261A3 EP0509261A3 (en) 1993-04-07
EP0509261B1 true EP0509261B1 (de) 1994-08-17

Family

ID=6429869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92104730A Expired - Lifetime EP0509261B1 (de) 1991-04-18 1992-03-19 Notabstellvorrichtung für eine Brennkraftmaschine

Country Status (4)

Country Link
EP (1) EP0509261B1 (es)
JP (1) JP2766581B2 (es)
AT (1) ATE110139T1 (es)
DE (1) DE4112689C1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6504373B2 (ja) * 2017-04-06 2019-04-24 株式会社清和モールド エアバルブ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7239402U (de) * 1973-09-27 Elektroteile Gmbh Abstellvorrichtung für Dieselmotoren
DD236570A1 (de) * 1985-04-25 1986-06-11 Aken Einspritzgeraetewerk Regelstangenverstelleinrichtung fuer eine einspritzpumpe an brennkraftmaschinen
DD238418A1 (de) * 1985-06-18 1986-08-20 Aken Einspritzgeraetewerk Elektrischer regler fuer eine einspritzpumpe an brennkraftmaschinen
DE3642458C1 (de) * 1986-12-12 1988-02-04 Mtu Friedrichshafen Gmbh Reguliervorrichtung einer Brennstoffeinspritzpumpe
DE3923123C1 (en) * 1989-07-13 1990-09-20 Mtu Friedrichshafen Gmbh Injection pump control rod - is used in IC engine and incorporates zero resetting system

Also Published As

Publication number Publication date
EP0509261A3 (en) 1993-04-07
DE4112689C1 (es) 1992-01-30
JPH0586916A (ja) 1993-04-06
EP0509261A2 (de) 1992-10-21
JP2766581B2 (ja) 1998-06-18
ATE110139T1 (de) 1994-09-15

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