EP2735726A2 - Moteur hydrostatique pour le démarrage d'un moteur à combustion - Google Patents

Moteur hydrostatique pour le démarrage d'un moteur à combustion Download PDF

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Publication number
EP2735726A2
EP2735726A2 EP13191529.0A EP13191529A EP2735726A2 EP 2735726 A2 EP2735726 A2 EP 2735726A2 EP 13191529 A EP13191529 A EP 13191529A EP 2735726 A2 EP2735726 A2 EP 2735726A2
Authority
EP
European Patent Office
Prior art keywords
engine
internal combustion
hydrostatic
pressure medium
combustion engine
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
EP13191529.0A
Other languages
German (de)
English (en)
Other versions
EP2735726A9 (fr
EP2735726A3 (fr
EP2735726B1 (fr
Inventor
Lukas Krittian
Martin Steigerwald
Martin OBERHÄUSSER
Dr. Alfred Langen
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.)
Linde Hydraulics GmbH and Co KG
Original Assignee
Linde Hydraulics GmbH and Co KG
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 Linde Hydraulics GmbH and Co KG filed Critical Linde Hydraulics GmbH and Co KG
Publication of EP2735726A2 publication Critical patent/EP2735726A2/fr
Publication of EP2735726A9 publication Critical patent/EP2735726A9/fr
Publication of EP2735726A3 publication Critical patent/EP2735726A3/fr
Application granted granted Critical
Publication of EP2735726B1 publication Critical patent/EP2735726B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N7/00—Starting apparatus having fluid-driven auxiliary engines or apparatus
    • F02N7/06—Starting apparatus having fluid-driven auxiliary engines or apparatus the engines being of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/001—Arrangements thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N7/00—Starting apparatus having fluid-driven auxiliary engines or apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons

Definitions

  • the invention relates to a hydrostatic engine, which is designed as an adjusting machine with a continuously variable displacement volume and is operable as a pump and motor and drivingly connected to an internal combustion engine, wherein the engine sucks in pumping operation with a suction side pressure medium from a container and in at least one Promotes consumer-led delivery line and wherein the engine is designed in engine operation as a hydraulic starter for starting the engine, wherein the engine in engine operation on the suction side pressure medium from a pressure medium reservoir can be fed.
  • Such hydrostatic engines which serve in pump operation, in which the engine is driven by the running internal combustion engine to supply at least one consumer with pressure medium, and serve in engine operation, a hydraulic starter for starting the parked internal combustion engine are in mobile work machines, especially trucks, Agricultural machinery, forestry machinery and construction machinery, such as excavators, wheel and telescopic loaders, tractors, combine harvesters, forage harvesters, sugar beet or potato harvesters used.
  • a start-stop function is provided for the internal combustion engine, in which the unloaded combustion engine is switched off during work breaks or work stoppages and automatically restarted when a torque request by a work function or the traction drive.
  • a hydraulic starter such a start-stop function of the internal combustion engine can be achieved in a robust and reliable manner.
  • a generic hydrostatic engine which sucks in pump operation, which is driven by an internal combustion engine engine with a suction side pressure medium from a container to supply the consumer working hydraulics with pressure medium and in an engine operation, the engine on the suction side pressure medium from a accumulator is supplied and the engine is driven by the supplied from the pressure fluid accumulator pressure medium, serves as a hydraulic starter for starting the parked engine.
  • the engine for engine operation is to be adjusted to a position with maximum displacement volume to allow the delivery of torque for starting the engine.
  • EP 2 308 795 A1 (FIG. 2) is known for this purpose to connect an adjusting device of the engine controlling the displacement volume with the pressure medium reservoir, so that the displacement volume adjusting device of the engine can be actuated with the pressure medium from the pressure medium reservoir when the internal combustion engine is switched off.
  • the accumulator is connected via a pressure reducing valve to a feed pressure circuit which serves to supply the adjusting device of the engine with pressure medium when the internal combustion engine is running.
  • the feed pressure circuit is downstream of a valve device that controls the engine operation of the engine by a connection of the accumulator with the suction side of the engine, connected to the accumulator so that the displacer volume adjusting means in time immediately before the starting process of the internal combustion engine with the pressure fluid from the accumulator in the position with Maximum displacer volume is adjusted.
  • Displacer volume adjusting means at the beginning of the starting process, a time delay in the starting operation of the internal combustion engine, which leads to disadvantages in a start-stop function in which the starting operation of the combustion engine in a short period of time to take place.
  • the present invention has for its object to provide a hydrostatic engine of the type mentioned available, which allows for low construction costs, a start of the engine during engine operation of the engine in a short period of time.
  • the operable as a motor and pump engine is provided with a Ausschwenkfeder by means of at a direct start of the engine by the engine operation of the engine without temporally immediately prior adjustment of the displacer volume adjusting device of the internal combustion engine a displacer volume of the engine controlling displacer volume adjusting device is acted upon in the position with maximum displacement volume Engine at the beginning of the starting process of the internal combustion engine takes place.
  • a displacer volume control device of the engine is automatically acted upon when the engine is turned off in the position with maximum displacer volume.
  • the engine is designed as a unilaterally adjustable engine and the displacement adjustment means of the engine is adjustable starting from a position with a minimum displacer volume in a direction of adjustment.
  • Such unilaterally adjustable engines are operated in the open circuit and allow for low construction costs and low energy consumption in pump operation, a supply of the connected consumers with pressure medium.
  • the Ausschwenkfeder such engine designed as a one-sided adjustable pump engine can be operated in a simple manner as a motor, which is driven on the suction side with pressure medium from the accumulator.
  • the Ausschwenkfeder at one with the Displacer volume adjusting device operatively connected actuating piston device of the engine attacks.
  • a hydrostatic engine designed as a variable displacement pump usually has an actuating piston device with which the displacer volume adjusting device can be adjusted and thus the displacer volume can be changed.
  • the Ausschwenkfeder invention can be supplemented such a control piston device in a simple manner.
  • the actuating piston device can be acted upon by means of a control valve with a control pressure, wherein when the internal combustion engine, the control piston device is relieved of the control pressure.
  • a control valve with a control pressure
  • pump operation can be generated by appropriate actuation of the control valve, a corresponding control pressure for acting on the control piston means and thus for the corresponding adjustment of the displacer volume.
  • the control valve may for example be designed as a load-sensing control valve, which is actuated by the load pressure of the driven consumer, or be designed as an electrically controllable control or regulating valve.
  • the engine is designed as an axial piston machine in a swash plate design.
  • the invention further relates to a drive train of a vehicle, in particular a mobile work machine, with a hydrostatic engine driven by an internal combustion engine, wherein the engine forms a hydraulic starter of the engine during engine operation and supplies a working hydraulic system of the working machine with pressure medium in pump operation.
  • a hydrostatic engine driven by an internal combustion engine, wherein the engine forms a hydraulic starter of the engine during engine operation and supplies a working hydraulic system of the working machine with pressure medium in pump operation.
  • a drive train 1 of a non-illustrated mobile work machine such as a truck or a construction or agricultural machine, with a hydrostatic engine 7 according to the invention is shown in a schematic diagram.
  • the drive train 1 consists of an internal combustion engine 2, for example a diesel engine, a propulsion drive 3 of the vehicle driven by the internal combustion engine 2 and a working hydraulic system 4 driven by the internal combustion engine 2 as hydraulic consumers V.
  • an internal combustion engine 2 for example a diesel engine
  • a propulsion drive 3 of the vehicle driven by the internal combustion engine 2 and a working hydraulic system 4 driven by the internal combustion engine 2 as hydraulic consumers V.
  • the traction drive 3 is formed in the illustrated embodiment as a hydrostatic drive, which consists of an adjustable in the delivery volume drive pump 5, which is in drive connection to the drive with an output shaft 6 of the engine 2.
  • the drive pump 5 is connected to one or more in the intake volume fixed or adjustable, not shown hydromotors in a closed circuit in connection, which are in a manner not shown in operative connection with the driven wheels of the machine.
  • the traction drive 3 may alternatively be formed as an electric traction drive with an electric generator driven by the internal combustion engine 2 and one or more electric traction motors.
  • a mechanical travel drive with a mechanical transmission such as a multi-step transmission or a power split transmission or a torque converter transmission, can be provided.
  • the working hydraulic system 4 includes working functions of the working machine, for example, in a truck, a working hydraulics for actuating a lifting device on a lifting mast, or in an example as an excavator trained construction machine the working functions of working equipment trained by a shovel.
  • hydrostatic engine 7 To supply the consumer V formed by the working hydraulic system 4 with pressure medium which is designed as an adjusting machine with a continuously variable displacement volume hydrostatic engine 7 is provided, which is preferably designed as an axial piston machine in swash plate design.
  • the engine 7 is operated in the open circuit and is for driving with the output shaft 6 of the internal combustion engine 2 in drive connection.
  • the engine 7 is the input side with the suction side by means of a suction pipe 8 with a container 9 in connection.
  • An output side connected to the delivery side of the engine 7 in conjunction delivery line 10 is connected to a control valve means, not shown, by means of which the not shown hydraulic consumers of the working hydraulic system 4 are controllable.
  • the control valve device preferably comprises one or more directional control valves for actuating the consumers.
  • a priority valve 12 is further shown, with which the preferred supply of a powered by the engine 7 consumer, such as a hydraulic steering device, can be ensured.
  • the priority valve 12 is connected on the input side to the delivery side of the engine 7 and on the output side communicates with the delivery line 10 leading to the working hydraulic system 4 and a delivery line 13 routed to the steering device.
  • the priority valve 12 is controlled by a spring 14 and the pending in a load pressure line 15 load pressure of the steering device.
  • the drive train 1 further comprises a feed pump 20, which is connected to the drive with the output shaft 6 in connection.
  • the feed pump 20 is formed in the illustrated embodiment as a constant displacement pump with a constant displacement volume, which is operated in the open circuit.
  • the feed pump 20 communicates with the suction side via a suction line 21 to the container 9 and conveys into a feed pressure line 22 connected to the delivery side, to which the corresponding consumers of a feed pressure circuit 23 are connected, for example adjusting devices for adjusting the displacement volume of the drive pump 5 and 5 of the engine 7, a hydrostatic feed device Traction drive, a brake system of the vehicle and pilot valves for the control valves of the working hydraulic system 4.
  • a pressure limiting device 24 for example, a pressure relief valve assigned.
  • the engine 7 of the working hydraulic system 4 is designed as Zwequadrantentriebwerk, which is operable at the same direction of rotation and the same flow direction of the pressure medium as a pump and motor.
  • the engine 7 sucks pressure medium from the container 9 via the intake line 8 and delivers the pressure medium via the priority valve 12 into the delivery line 10 of the working hydraulic system 4 or the delivery line 13 of the steering device.
  • the engine 7 is driven at the suction side with pressure medium from a pressure medium reservoir 25.
  • the accumulator 25 is connected for charging with pressure medium to the guided to the working hydraulic system 4 conveying line 10 of the engine 7 by means of a connecting line 26.
  • an electrically actuated charging valve 27 is arranged, which is actuated at a control in a throttling the delivery line 10 throttle position for damming a pressure.
  • the charging valve 27 is preferably designed as a retarder valve 28, which is operated in the braking operation of the vehicle in a throttle position to impose an additional, decelerating torque on the output shaft 6 formed by the crankshaft by damming a pressure in the delivery line 10, which is the torque acting on the engine counteracts the drive pump 5 and thus slows down the vehicle.
  • connection line 26 is in this case connected upstream of the charging valve 27 and thus between the charging valve 27 and the priority valve 12 to the delivery line 10.
  • a check valve 30 is arranged, which is preferably designed as in the direction of the accumulator 25 opening check valve 31. Furthermore, the connecting line 26 between the check valve 30 and the accumulator 25, a pressure relief valve 32 to protect the pressure in the accumulator 25 is assigned.
  • a throttle device 33 is further arranged to limit the loading volume flow of the accumulator 25, which may be designed as a diaphragm or throttle. As shown, the throttle device 33 can be arranged upstream of the shut-off valve 30 or alternatively downstream of the shut-off valve 30.
  • the connecting line 26 between the check valve 30 and the accumulator 25 is further associated with a pressure sensor 34.
  • the pressure sensor 34 is used to monitor the boost pressure and thus the state of charge of the accumulator 25.
  • the connection of the accumulator 25 with the suction side of the engine 7 for engine operation of the engine 7 is controlled by means of an electrically actuated control valve 35.
  • the control valve 35 has a blocking position 35a and a flow position 35b, wherein the blocking position 35a is preferably carried out leak-tight with a blocking in the direction of the engine 7 check valve.
  • the control valve 35 is arranged in a branch line 36, which is guided by the connecting line 26 between the check valve 30 and the accumulator 25 to the guided to the suction side of the engine 7 intake 8.
  • a blocking in the direction of the container 9 check valve 37 is arranged, which is preferably designed as a blocking in the direction of the container check valve 38.
  • An electronic control device 40 is connected to the input side of the pressure sensor 34 and serves to control the charging valve 27 and the control valve 35th
  • the engine 7 designed as an adjusting machine with a continuously variable displacer volume has a displacer volume adjustment device 50 for adjusting the displacer volume, for example a swashplate of an axial piston machine of swashplate design that is adjustable in inclination.
  • the displacer volume adjusting device 50 can be actuated by means of an actuating piston device 51, which is in operative connection with the displacer volume adjusting device 50.
  • the engine 7 according to the invention is designed as a unilaterally adjustable engine, in which the displacer volume adjusting device 50 is adjustable starting from a position with minimum displacer volume, preferably a position with zero displacement in a direction or pivoting direction to a position with maximum displacement.
  • the actuating piston device 51 has an actuating pressure chamber 51a acting in the direction of the maximum displacement volume and a control pressure chamber 51b acting in the direction of the minimum displacement volume, the pressurization of which is controllable with a control pressure or its discharge to the vessel 9 by means of a control valve 52.
  • the control valve 52 is connected to the supply of pressure medium and for generating a control pressure in the control pressure chambers 51 a and 51 b via a branch line 53 to the feed pressure line 22 and thus the feed pressure circuit 23. Furthermore, the control valve 52 has a connection to a tank conduit 54 guided to the container.
  • the control valve 52 is preferably electrically actuated. When the internal combustion engine 2, the control pressure chamber 50a, 50b of the control piston device 50 are relieved.
  • the control valve 52 is designed as a control valve, wherein a mechanical feedback and feedback 56 of the actual position of the displacement volume control device 50 is provided on the control valve 52.
  • a Ausschwenkfeder 55 is provided according to the invention, which is in operative connection with the control piston 51 and the displacement volume control device 50 with the engine stopped 2 in the position with maximum displacement volume for the engine operation of the engine 7 is applied.
  • the Ausschwenkfeder 55 can be arranged for this purpose in the control pressure chamber 51a of the control piston 51.
  • a directly preceding the starting process of the internal combustion engine 2 adjusting the displacement volume adjusting device 50 of the engine 7 to the maximum displacement volume or adjusting the displacement volume control device 50 of the engine 7 to the maximum displacement volume at the beginning of the starting process of the engine 7 is thus not required, so that the starting process of Internal combustion engine 2 is carried out with the engine 7 according to the invention in a short period of time in a start-stop function.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)
EP13191529.0A 2012-11-22 2013-11-05 Moteur hydrostatique pour le démarrage d'un moteur à combustion Active EP2735726B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012111299.1A DE102012111299A1 (de) 2012-11-22 2012-11-22 Hydrostatisches Triebwerk zum Starten eines Verbrennungsmotors

Publications (4)

Publication Number Publication Date
EP2735726A2 true EP2735726A2 (fr) 2014-05-28
EP2735726A9 EP2735726A9 (fr) 2014-07-23
EP2735726A3 EP2735726A3 (fr) 2015-12-09
EP2735726B1 EP2735726B1 (fr) 2020-09-02

Family

ID=49546284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13191529.0A Active EP2735726B1 (fr) 2012-11-22 2013-11-05 Moteur hydrostatique pour le démarrage d'un moteur à combustion

Country Status (4)

Country Link
US (1) US9429129B2 (fr)
EP (1) EP2735726B1 (fr)
CN (1) CN103835855B (fr)
DE (1) DE102012111299A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9745940B2 (en) * 2014-02-28 2017-08-29 Caterpillar Inc. Machine having hydraulic start assist system
US9618014B2 (en) * 2014-02-28 2017-04-11 Caterpillar Inc. Implement system having hydraulic start assist
DE102014215549A1 (de) * 2014-08-06 2016-02-11 Robert Bosch Gmbh Hydrostatischer Antrieb
US9567986B2 (en) * 2014-09-19 2017-02-14 Caterpillar Inc. Flow control for a hydraulic system
CN106594154A (zh) * 2016-12-06 2017-04-26 天津迎南科技有限公司 机电减震机构
CN106594167A (zh) * 2016-12-06 2017-04-26 天津元章科技有限公司 机电混合减震机构
US11225938B2 (en) * 2020-02-28 2022-01-18 OneHydraulics Hydraulic start systems and methods for the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2308795A1 (fr) 2009-10-09 2011-04-13 Linde Material Handling GmbH Dispositif hydraulique et procédé de fonctionnement dans une machine de travail mobile

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US3153899A (en) * 1962-03-12 1964-10-27 New York Air Brake Co Hydraulic starting and pumping method and apparatus
DE2542244A1 (de) * 1975-09-23 1977-03-31 Langen & Co Hydraulische anlage zum anlassen einer brennkraftmaschine
DE3150533A1 (de) * 1981-12-21 1983-07-07 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Vorrichtung zur regelung eines hydrostatischen antriebs
CN201206523Y (zh) * 2008-04-07 2009-03-11 宋秀峰 一种液压蓄能起动发动机装置
DE102009056153A1 (de) * 2009-11-27 2011-06-01 Robert Bosch Gmbh Antriebssystem mit multifunktionaler Energierückgewinnung und Verfahren zu dessen Betrieb
CN102230436B (zh) * 2011-06-14 2013-08-07 江苏科技大学 柴油机液压起动储能装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2308795A1 (fr) 2009-10-09 2011-04-13 Linde Material Handling GmbH Dispositif hydraulique et procédé de fonctionnement dans une machine de travail mobile

Also Published As

Publication number Publication date
CN103835855B (zh) 2017-08-29
EP2735726A9 (fr) 2014-07-23
EP2735726A3 (fr) 2015-12-09
DE102012111299A1 (de) 2014-05-22
CN103835855A (zh) 2014-06-04
US9429129B2 (en) 2016-08-30
US20140208733A1 (en) 2014-07-31
EP2735726B1 (fr) 2020-09-02

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