GB2276917A - Control of a mechanical injection pump governor of an i.c. engine with an automatic gearbox - Google Patents

Control of a mechanical injection pump governor of an i.c. engine with an automatic gearbox Download PDF

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Publication number
GB2276917A
GB2276917A GB9406675A GB9406675A GB2276917A GB 2276917 A GB2276917 A GB 2276917A GB 9406675 A GB9406675 A GB 9406675A GB 9406675 A GB9406675 A GB 9406675A GB 2276917 A GB2276917 A GB 2276917A
Authority
GB
United Kingdom
Prior art keywords
pressure
conduit
internal combustion
combustion engine
capsule
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.)
Granted
Application number
GB9406675A
Other versions
GB2276917B (en
GB9406675D0 (en
Inventor
Christoph Burckhardt
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of GB9406675D0 publication Critical patent/GB9406675D0/en
Publication of GB2276917A publication Critical patent/GB2276917A/en
Application granted granted Critical
Publication of GB2276917B publication Critical patent/GB2276917B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/10—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the vehicle 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0671—Engine manifold pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0616—Position of fuel or air injector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • F16H59/26—Inputs being a function of torque or torque demand dependent on pressure
    • F16H59/30—Intake manifold vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • F16H59/34—Inputs being a function of torque or torque demand dependent on fuel feed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor
    • F16H63/502—Signals to an engine or motor for smoothing gear shifts

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Control Of Transmission Device (AREA)
  • Structure Of Transmissions (AREA)

Description

1 2276917 Internal combustion engine with automatic gearbox control and
mechanical injection pump governor The invention relates to an internal combustion engine with automatic gearbox control and a mechanical injection pump governor with a pressure capsule, which depends on boost pressure and/or atmospheric pressure.
Such an internal combustion engine with automatic gearbox and with a control device for determining the delivery quantity is known from the Mercedes-Benz "Einfiffirungsschrift. ftir den Kundendienst, Neuerungen Personenwagen 6.91, Modelljahr 92, [Introductory information for aftersales service personnel; new features on cars 6.91, model range 192], page 32 in which the rotational speed governor, which is controlled by centrifugal force, has a pressure capsule which is in engagement with the governor linkage and acts on a delivery quantity adjusting element of the injection pump as a function of the boost pressure and also as a function of the atmospheric pressure in order to influence the quantity. The pressure capsule is connected to the induction manifold by means of a pressure conduit.
Furthermore, a pressure sensor is in connection with the pressure conduit and the pressure signals recorded by it are input into an electronic control unit where they are processed with further operating parameters and act as control signals for the activation of the exhaust gas recycling.
In internal combustion engines embodied in this way with automatic gearbox control, undesirably high and therefore critical differential rotational speeds can occur at the gear-changing elements, for example between a sun wheel and a brake band. These lead to functional impairment and, in the worst case, to destruction of the gearbox, particularly in those cases where, when changing from the "idle" position or "park" position, an excessively high engine torque, which the gearbox cannot handle, is applied to the automatic gearbox.
2 The present invention seeks to obviate the disadvantages described by simple means and thereby to increase the life of the automatic gearbox.
According to the present invention there is provided an internal combustion engine with an automatic gearbox and a mechanical injection pump governor with a pressure capsule responsive to a boost pressure and/or atmospheric pressure, and, with a pressure sensor adapted to sense the pressure in the pressure capsule to generate a signal which is supplied to a control unit, wherein a vacuum connection adapted to be connected to the pressure capsule in the case of unacceptably high torques of the internal combustion engine, is provided with an electric switching valve which is adapted to be activated by the control unit.
Critical differential rotational speed variations occurring at the automatic gearbox can be suppressed in good time or obviated in a simple manner by the measure according to the invention by means of a controlled vacuum-operated actuation intervention at the pressure capsule, which depends on boost pressure and/or atmospheric pressure.
In one preferred embodiment, a branch conduit leading to the pressure sensor branches off from a conduit section of the pressure conduit connecting the electric switching valve to the pressure capsule. In this case, the pressure sensor is connected by a short path to the quantitydetermining system of a supercharged internal combustion engine, which has the advantage of direct association with the injection pump, and therefore with the engine torque, and permits more rapid influence on the automatic gearbox as compared with another embodiment, in which the pressure sensor is arranged at the induction end, namely between the electrical switching valve and the induction manifold.
In another preferred embodiment, suitable for naturally aspirated engines, with a pressure capsule dependent on atmospheric pressure, the electric switching valve is only arranged in the vacuum connection and is adapted to be transferred into a vent position from a switching position if 3 corresponding to the vacuum connection.
Three embodiments of the invention will now described in more detail below with reference to the drawings in which:Fig. I shows, in a diagrammatic representation, the subject-matter of the invention for a supercharged internal combustion engine, Fig. 2 shows, in a diagrammatic representation, another embodiment in accordance with the invention, likewise for a supercharged internal combustion engine, Fig. 3 shows, in a diagrammatic representation, a further embodiment in accordance with the invention for a naturally induced internal combustion engine.
Fig. 1 shows a supercharged internal combustion engine I with an automatic gearbox 2 and an in-line injection pump 3 whose mechanical injection pump governor 4 has a pressure capsule 5, which depends on boost pressure and atmospheric pressure and is connected to the induction manifold 7 of the internal combustion engine 1 by means of a pressure conduit 6.
An auxiliary conduit 9 leading to a pressure sensor 8 branches off from the pressure conduit 6, specifically in the vicinity of the induction manifold 7. The pressure signals recorded by the pressure sensor 8, together with signals from an accelerator pedal pick-up 10 and signals from a rotational speed sensor 11, are input into an electronic control unit 12 whose processed output signals are used for activating the automatic gearbox 2 and for activating an electric switching valve 13, which is configured as a 3/2-way valve and is connected in an intermediate position in the pressure conduit 6.
In uncritical torque ranges, the electric switching valve 13 is switched to transmission depending on boost pressure. In this switching position, therefore, the pressure capsule 5 operates as a function of boost pressure. As soon as an engine torque is reached which the automatic gearbox can no longer handle,, however, the electric switching valve 13, 4 which is activated by the control unit 12, switches over and the connection to the induction manifold 7 is interrupted and, simultaneously, a torque-reducing connection is made between the pressure capsule 5 and a vacuum connection 14.
The vacuum connection 14 can be connected to an existing vacuum pump 15, which is used for supporting the braking force on the vehicle.
In Fig. 2, a pressure conduit arrangement f or an internal combustion engine 1 which is operated with boost pressure is employed. In this, a branch conduit 16 connected to the pressure sensor 8 leads away f rom a conduit section 6a located between the electric switching valve 13, which is a 3/2-way valve, and the pressure capsule 5.
Fig. 3 shows a conduit arrangement for a naturally induced engine. The pressure capsule 5 on the injection pump governor 4 operates as a function of atmospheric pressure only and is connected to the control unit 12, in which the atmospheric pressure pick-up is integrated (not shown), by a vacuum conduit 17.
The vacuum connection 14 connects the pressure capsule 5 to the vacuum pump 15 with the electric switching valve 13 connected between them. This electric switching valve 13, which is a 3/2-way valve, is switched by the control unit 12 from a ventilation position or atmospheric pressure position to "transmission" depending on vacuum when critical engine torque regions occur.
Because of the vacuum acting on the pressure capsule 5, there is an intervention in the governor linkage which reduces quantity and therefore torque and, finally, an intervention on the delivery quantity adjusting element of the fuel injection pump 3.
P claims 1. An internal combustion engine with an automatic gearbox and a mechanical injection pump governor with a pressure capsule responsive to a boost pressure and/or atmospheric pressure, and, with a pressure sensor adapted to sense the pressure in the pressure capsule to generate a signal which is supplied to a control unit, wherein a vacuum connection adapted to be connected to the pressure capsule in the case of unacceptably high torques of the internal combustion engine, is provided with an electric switching valve which is adapted to be activated by the control unit.

Claims (1)

  1. 2. An internal combustion engine according to Claim 1, with a pressure
    capsule responsive to a boost pressure and/or atmospheric pressure, and which is also connected by a pressure conduit to an induction manifold, wherein the electric switching valve, comprising a 3/2-way valve, is connected in an intermediate position in the pressure conduit.
    3. An internal combustion engine according to Claim 1 or 2, wherein an auxiliary conduit, which is connected to the pressure sensor, leads away from a conduit section of the pressure conduit leading to the pressure capsule, which conduit section connects the induction manifold to the electric switching valve.
    4. An internal combustion engine according to Claim 1 or 2, wherein a branch conduit leading to the pressure sensor branches off from a conduit section of the pressure conduit connecting the electric switching valve to the pressure capsule.
    5. An internal combustion engine according to claims 1 and 2 with a pressure capsule dependent on atmospheric pressure, wherein the electric switching valve is only 6 arranged in the vacuum connection and is adapted to be transferred into a vent position from a switching position corresponding to the vacuum connection.
    6. An internal combustion engine according to any one of the preceding claims, wherein the vacuum connection is connected to a vacuum pump which is provided for braking force support.
    7. An internal combustion engine with an automatic gearbox and a mechanical injection pump governor with a pressure capsule, substantially as described herein with reference to and as illustrated in the accompanying drawings.
GB9406675A 1993-04-09 1994-04-05 Internal combustion engine with automatic gearbox control and mechanical injection pump governor Expired - Fee Related GB2276917B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4311784A DE4311784C1 (en) 1993-04-09 1993-04-09 IC engine with automatic gear control and mechanical regulator for fuel-injection pump - has charge pressure and/or atmospheric pressure-dependent pressure box and engine torque not to be processed for automatic gear connectable to vacuum connection

Publications (3)

Publication Number Publication Date
GB9406675D0 GB9406675D0 (en) 1994-05-25
GB2276917A true GB2276917A (en) 1994-10-12
GB2276917B GB2276917B (en) 1995-10-25

Family

ID=6485192

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9406675A Expired - Fee Related GB2276917B (en) 1993-04-09 1994-04-05 Internal combustion engine with automatic gearbox control and mechanical injection pump governor

Country Status (4)

Country Link
DE (1) DE4311784C1 (en)
FR (1) FR2703732B1 (en)
GB (1) GB2276917B (en)
IT (1) IT1272974B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374096A (en) * 1970-11-09 1974-11-13 Tatra Np Arrangement for controlling the torque of a supercharged fuel- injected vehicle engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3118501A1 (en) * 1981-05-09 1982-12-02 Bayerische Motoren Werke AG, 8000 München SAFETY DEVICE FOR A DIESEL INJECTION COMBUSTION ENGINE WITH EXHAUST TURBOCHARGER
FR2556781B1 (en) * 1983-12-19 1986-04-18 Renault TORQUE LIMITING SUPPLY DEVICE
DE3621840A1 (en) * 1986-06-28 1988-02-25 Iveco Magirus DRIVE UNIT OF A MOTOR VEHICLE, IN PARTICULAR COMMERCIAL VEHICLE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1374096A (en) * 1970-11-09 1974-11-13 Tatra Np Arrangement for controlling the torque of a supercharged fuel- injected vehicle engine

Also Published As

Publication number Publication date
FR2703732A1 (en) 1994-10-14
IT1272974B (en) 1997-07-01
FR2703732B1 (en) 1998-06-19
ITRM940195A0 (en) 1994-04-06
ITRM940195A1 (en) 1995-10-06
GB2276917B (en) 1995-10-25
DE4311784C1 (en) 1994-04-28
GB9406675D0 (en) 1994-05-25

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010405