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WO2011110207A1 - Véhicule à moteur doté d'un entraînement hydraulique supplémentaire - Google Patents

Véhicule à moteur doté d'un entraînement hydraulique supplémentaire Download PDF

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Publication number
WO2011110207A1
WO2011110207A1 PCT/EP2010/007417 EP2010007417W WO2011110207A1 WO 2011110207 A1 WO2011110207 A1 WO 2011110207A1 EP 2010007417 W EP2010007417 W EP 2010007417W WO 2011110207 A1 WO2011110207 A1 WO 2011110207A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
pump
switching valve
hydraulic circuit
circuit
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.)
Ceased
Application number
PCT/EP2010/007417
Other languages
German (de)
English (en)
Inventor
Wolfgang Pedrotti
Stefan Kaiser
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.)
Mercedes Benz Group AG
Original Assignee
Daimler 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 AG filed Critical Daimler AG
Publication of WO2011110207A1 publication Critical patent/WO2011110207A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • 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
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4043—Control of a bypass valve
    • 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
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • B60K2025/026—Auxiliary drives directly from an engine shaft by a hydraulic transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/14—Trucks; Load vehicles, Busses

Definitions

  • the invention relates to a motor vehicle with a hydraulic auxiliary drive according to the preamble of claim 1.
  • the generic document DE 4110161 A1 describes a motor vehicle with a drive machine, a mechanical main drive path and a hydraulic auxiliary drive path.
  • the prime mover is shown as an internal combustion engine which drives the rear wheels of a motor vehicle via the mechanical main drive path.
  • the auxiliary hydraulic drive path includes an adjustable hydrostatic pump and a hydraulic motor connected by a hydraulic circuit.
  • the pump is permanently connected via a translation with a power take-off of the drive machine.
  • the pump is designed as a swash plate control pump.
  • another hydraulic auxiliary unit is connected to the hydraulic circuit of the hydraulic auxiliary drive path with the adjustable hydrostatic pump and the hydraulic motor, which is not useful for locomotion of the motor vehicle.
  • the hydraulic auxiliary unit is in particular a commercial vehicle body, which does not serve the locomotion, but fulfills additional functions that the motor vehicle executes while standing or while driving.
  • Commercial vehicle bodies such as in particular
  • Rotary concrete mixers, tipping bridges or compactors are hydraulically driven and require the operation of a hydrostatic delivery unit.
  • a hydrostatic Feed unit in the form of an adjustable hydrostatic pump available.
  • the hydrostatic pump is adjustable by a control or regulation so that a pumping capacity meets both requirements of the hydraulic auxiliary drive and the requirements of the hydraulic auxiliary unit.
  • the hydraulic auxiliary unit is drivably connected to the existing hydraulic circuit of the hydraulic auxiliary drive path, so that eliminates a further hydraulic circuit and duplicate components can be saved.
  • the adjustable hydrostatic pump is connected via a clutch to a power take-off of the drive machine.
  • the pump is disconnectably connected to the power take-off via the clutch, so that the torque transmission from the drive machine to the pump can be interrupted and, when the hydraulic circuit is switched off, no power loss occurs at the pump.
  • the state of the motor vehicle is a power transmission from the prime mover on the mechanical main drive path to the wheels in a transmission unit
  • the pump is arranged on the permanently driven power take-off of the drive machine, so that the pump can also be driven in the state of the motor vehicle when the mechanical main drive path is interrupted.
  • the pump is the only hydrostatic power source for operating the hydraulic motor and the hydraulic auxiliary unit in the hydraulic circuit.
  • auxiliary hydraulic drive path is designed to assist main mechanical drive path performance at low speeds or rough terrain, the auxiliary hydraulic drive path will not permanently transfer power to a hydraulic motor in a wheel
  • hydrostatic pump for power delivery to the hydraulic auxiliary unit is available.
  • Additional unit is available.
  • Other hydraulic accessories such as in particular rotary concrete mixer require a drive option both while stationary and during locomotion of the motor vehicle.
  • the hydraulic auxiliary drive path is used in particular for
  • feed pumps or rinsing pumps for the functional operation of a hydraulic circuit, a volume flow from a hydraulic sump in the
  • the hydraulic circuit has a valve, so that the hydraulic motor can be separated from the hydraulic flow of the pump.
  • the valve is designed in particular as a switching valve, so that the hydraulic motor can be separated from the hydraulic circuit. A switching position of the valve blocks the
  • Hydraulic flow in the hydraulic circuit so that the hydraulic motor is switched off, even though the hydraulic circuit is switched on.
  • the hydraulic circuit has a valve, so that the hydraulic auxiliary unit can be separated from the hydraulic flow of the pump.
  • the valve is designed in particular as a switching valve, so that the hydraulic
  • Additional unit can be separated from the hydraulic circuit.
  • a switching position of the valve blocks the hydraulic flow in the hydraulic circuit, so that the hydraulic
  • hydraulic auxiliary unit When disconnected from the hydraulic circuit hydraulic auxiliary unit eliminates power losses and leaks on hydraulic auxiliary unit so that the hydraulic circuit is available for further use efficiently.
  • the switching valve for separating the hydraulic motors and the switching valve for separating the hydraulic additional unit can be combined in particular in a 3/2-way valve having two switching positions.
  • a first switching position of the directional control valve connects the hydraulic circuit with the hydraulic motor and separates the hydraulic auxiliary unit from the hydraulic circuit.
  • a second switching position of the directional valve connects the hydraulic circuit with the hydraulic auxiliary unit and separates the hydraulic motor from the hydraulic circuit.
  • a 3/2-way valve fulfills two requirements simultaneously, a Abtrenn réellekeit of the hydraulic motor and a Abtrennungitzkeit the hydraulic auxiliary unit.
  • the pump as
  • Axial piston machines are available in all power ranges and have low power losses, so that the hydraulic circuit has a high efficiency.
  • Additional unit to a hydraulic piston, which is movable via an open hydraulic circuit by a hydraulic flow of the pump.
  • Rotation with torque and linear power transmission are the two basic technical ways to do work.
  • a linear force transmission takes place in particular by a movement of a piston.
  • hydraulic fluid flows into the interior of a cylinder that surrounds the piston and by a displacement effect of the hydraulic fluid, the piston moves out of the cylinder.
  • the linear force transmission of a piston can be used in a variety of ways, in particular by means of a reversing lever.
  • Movement of the piston may move the piston out of the cylinder or push the piston into the cylinder, depending on the configuration of the piston in the cylinder and a direction of deflation.
  • the power transmission takes place in the direction of movement.
  • the piston is arranged in a cylinder and is by filling the cylinder with Hydraulic fluid moves out of the cylinder under pressure. Via a valve, in particular a switching valve, the hydraulic fluid can flow out of the cylinder. If an external force acts on the piston from outside, the piston automatically displaces the hydraulic fluid from the valve via the open valve
  • the hydraulic piston performs work during movement, which is necessary for technical functions such as, in particular, compression of an external volume or lifting of an object against its weight.
  • Hydraulic auxiliary units of a motor vehicle such as in particular commercial vehicle bodies for dump trucks with telescopic cylinders or refuse collection vehicles with refuse compactors use hydraulic pistons.
  • the piston When extending the piston, the piston moves out of the cylinder and it fills a volume in the cylinder of the piston with hydraulic fluid.
  • the total amount of hydraulic fluid in the hydraulic circuit and the cylinder together increases.
  • Hydraulic fluid is supplied from the pump under high pressure via the hydraulic circuit to the piston, which accumulates there in the cylinder. A backflow of the hydraulic fluid from the piston to the pump does not take place during extension of the piston.
  • An open hydraulic circuit is connected to a hydraulic sump, so that a hydraulic fluid change in the system can be compensated.
  • the pump is connected via the open hydraulic circuit on the low pressure side with a hydraulic sump, from which the pump draws in missing hydraulic fluid and thus increases the total amount of hydraulic fluid in the open hydraulic circuit by the amount of hydraulic fluid in the cylinder.
  • the cylinder is connected via a valve, in particular a switching valve, with the hydraulic sump, so that for retraction of the piston, the valve is open and an external force pushes the piston back into the cylinder and thus the hydraulic fluid from the cylinder flows into the hydraulic sump.
  • a valve in particular a switching valve
  • the open hydraulic circuit which connects the hydraulic piston of the hydraulic auxiliary unit to the adjustable hydrostatic pump, allows the hydraulic auxiliary drive path to still use the system for a variety of other technical functions without significant additional components.
  • a hydraulic auxiliary unit can also have a hydraulic motor with which a hydraulic flow of the pump can be converted into torque.
  • a hydraulic motor may be connected both via an open hydraulic circuit and via a closed hydraulic circuit, the closed hydraulic circuit being advantageous for operation of the hydraulic motor.
  • In a closed hydraulic circuit is a flow rate equal to leakage losses everywhere. The hydraulic fluid flows back under high pressure from the pump to the hydraulic motor of the hydraulic auxiliary unit and at low pressure back from the hydraulic motor to the pump. The volume flow and thus a power transfer is well adjusted in a closed circuit, which can be done by a control or regulation.
  • a hydraulic motor converts a hydraulic flow under pressure into a mechanical one
  • the hydraulic auxiliary unit is so versatile formable, in particular as
  • Various hydraulic auxiliary units are compatible with a basic system of a hydraulic auxiliary drive path through a connection via a closed hydraulic circuit or an open hydraulic circuit, wherein essential components are reusable without further additional elements, which saves costs in such a system.
  • Fig. 1 is a schematic representation of a motor vehicle with hydraulic
  • FIG. 2 is a schematic representation of a hydraulic circuit for a hydraulic auxiliary drive and a hydraulic auxiliary unit, which is connected via a closed hydraulic circuit,
  • Fig. 3 is an overview of possible operating conditions of the hydraulic circuit
  • FIG. 2 with respective switching positions of the valves
  • FIG. 4 is a schematic representation of a hydraulic circuit for a hydraulic auxiliary drive and a hydraulic auxiliary unit, which is connected via an open hydraulic circuit
  • Fig. 5 is an overview of possible operating conditions of the hydraulic circuit
  • Figure 1 shows a schematic representation of a motor vehicle with a
  • the mechanical main drive path 2 transmits a part of a driving force of the engine 1 via a main output shaft 5a, a transmission unit 4, and a drive shaft 5b to a rear axle unit 6 of the vehicle.
  • the mechanical main drive path 2 transmits mainly during normal road travel mainly the driving force and corresponds to known technology for motor vehicles.
  • the hydraulic auxiliary drive path 3 has a hydraulic circuit 11 with an adjustable hydrostatic pump 7, a hydraulic auxiliary unit 12 and a respective hydraulic motor 9, 10 in the front wheels of the motor vehicle, which are not drivable via the mechanical main drive path.
  • the pump 7 is arranged on a power take-off 8 of the drive machine 1.
  • the power take-off 8 is connected in the prime mover 1 to the main output shaft 5a and rotates at a proportional speed.
  • a clutch 13 is arranged between the pump 7 and the power take-off 8. By the coupling 13, the pump 7 can be separated from the power take-off 8.
  • the pump 7 transmits no power to the hydraulic motors 9, 10.
  • the pump 7 is disconnected from the power take-off 8 and no power dissipated at the pump 7, although the power take-off 8 permanently rotates further.
  • the hydraulic auxiliary unit 12 is connected via the hydraulic circuit 11 with the pump 7 drivable.
  • the pump 7 transmits a portion of the torque to the drive to the hydraulic auxiliary unit 12. Both the hydraulic motors 9, 10 and the hydraulic auxiliary unit 12 are driven by the pump 7 so.
  • FIG. 2 shows a schematic representation of a hydraulic circuit 11 of the
  • the pump 7 is detachably connected via the clutch 13 to a mechanical drive and is connected via the hydraulic circuit 11 to the hydraulic motors 9, 10.
  • the pump 7 is designed as an adjustable pivot pump, in which by regulating or controlling the pivot angle, a pump power of the pump 7 is adjustable.
  • the swing angle is adjustable in both the positive and negative directions with respect to the axial orientation of the pump.
  • the hydraulic motors 9, 10 are drivable by the directional hydraulic flow in both directions of rotation and are both when driving in the forward direction and when driving in
  • the hydraulic circuit has a Hydraulik basicallykeitseinspeisevorraum 16, which feeds hydraulic fluid from a hydraulic sump via a feed pump and check valves in the hydraulic circuit 11. Because of a possible change of direction of the hydraulic flow in the hydraulic circuit 11 is the
  • Hydraulik essential Weglik worthkesseinspeisevortechnisch 16 designed so that via hydraulic check valves always on the low pressure side of the pump 7 hydraulic fluid in the hydraulic circuit 11 can be fed.
  • a switching valve 15 connects depending on the switching position of the switching valve 15 the
  • Hydraulic circuit 11 on the low pressure side of the pump 7 via a cooling device and a filter device with a hydraulic sump or blocks the connection.
  • a switching valve 14 is disposed on a hydraulic bypass of the hydraulic motors 9, 10 and depending on the switching position of the switching valve 14 is the hydraulic
  • the Hydraulik essencekeitseinspeisevorraum 16 the switching valve 15, the switching valve 14 and their arrangement in the hydraulic circuit 11 correspond to known art of a hydraulic auxiliary drive path and will not be further explained.
  • the hydraulic auxiliary unit 12 has a hydraulic motor 19 and is connected via a closed hydraulic circuit 20 to the hydraulic circuit 11.
  • a switching valve 17 is arranged on one side of the pump 7 between the pump 7 and the hydraulic motors 9, 10 and arranged on the other side of the pump 7 between the pump 7 and the hydraulic motors 9, 10, a switching valve 18, so that the hydraulic circuit 11 is divided by the switching valves 17, 18 into a first hydraulic pitch circle 11a and into a second hydraulic pitch circle 11b.
  • the first hydraulic circuit 11a are the pump 7, the
  • Hydraulic fluid feed device 16 and the switching valve 15 is connected.
  • the hydraulic motors 9, 10 and their bypass to the switching valve 14 are arranged.
  • the first hydraulic pitch circle 11a can be connected to the closed hydraulic circuit 20, so that the hydraulic motor 19 can be driven by the pump 7.
  • Switching valve 17 and the switching valve 18 are both designed as a 3/2 way valve, so that the switching valve 17 and the switching valve 18 in a switching position the first
  • hydraulic pitch 11a connects to the second hydraulic pitch 11 b and the hydraulic circuit 11 is closed via the hydraulic motors 9,10.
  • closed hydraulic circuit 20 is separated from the first hydraulic circuit 11a.
  • the hydraulic flow of the pump 7 thus flows via the hydraulic motors 9, 10 or via the switching valve 14 at the bypass of the hydraulic motors 9, 10 and not via the hydraulic auxiliary unit 12.
  • the closed hydraulic circuit 20 is completely separate from the first hydraulic circuit 11a, so that no leaks and
  • the second hydraulic circuit 11 b is separated with the hydraulic motors 9, 10 from the first hydraulic circuit 11 a, wherein the closed hydraulic circuit 20 is connected to the first hydraulic circuit 11 a.
  • the hydraulic flow of the pump 7 thus flows via the hydraulic auxiliary unit 12 and not via the hydraulic motors 9, 10.
  • the hydraulic flow of the pump 7 flows through the first hydraulic partial circuit 11 a and the closed hydraulic circuit 20 via the hydraulic motor 19, so that the hydraulic flow of the pump 7 is converted into a mechanical torque by the hydraulic motor 19 and drives the auxiliary hydraulic unit 12.
  • the hydraulic auxiliary unit 12 is in particular as a commercial vehicle body as in a
  • the closed hydraulic circuit 20 is connected via the switching valves 17 and the switching valve 18 to the first hydraulic circuit 11a.
  • a hydraulic flow in the closed hydraulic circuit 20 is constant except for leaks everywhere, so that only one switching valve of the switching valves 17, 18 is sufficient to block the hydraulic flow through the closed hydraulic circuit 20.
  • the switching valve 18 is replaced by a hydraulic line connection, so that on the Hydraulic line connection of the first hydraulic partial circuits 11a, the second hydraulic partial circuits 11 b and the closed hydraulic circuit 20 are always connected to each other. Pressure changes in the hydraulic circuit 11 always act on the hydraulic motor 19, but since the switching valve 17 continues to block a hydraulic flow through the closed hydraulic circuit 20 is no power to the
  • Switching valve 17 is installed. But by the hydraulic line connection are
  • FIG. 3 shows an overview of possible operating states of the hydraulic circuit 11 from FIG. 2.
  • the position of the clutch 13 as K13, the pump 7 as P7 and the respective shift positions of the switching valve 4 as V14, are shown in tabular form
  • the designation of the switching position relates in each case to the valves in FIG. 2:
  • an operating state is indicated symbolically, wherein the table contains the operating states for a traction drive FA, FS, FV, FR and for an operation ZDR, ZDL of a hydraulic auxiliary unit 12 with a hydraulic motor 19.
  • the switching valve 14 in the fifth column V15, the switching valve 15, in the sixth column V17, the switching valve 17 and in the eighth column V18, the switching valve 18 is shown, wherein zero, one and two each for a switching position of the respective Switching valve of Figure 2 is.
  • the operation of the hydraulic auxiliary unit 12 differs in a direction of rotation of the hydraulic motor 19, which results from the adjustment of the pivot angle of the pump 7. In the HA mode, no hydraulic power is required and the auxiliary hydraulic drive path 3 is off. There will be no drive power on the
  • Hydraulic motors 9, 10 in the wheels of the motor vehicle or to the hydraulic
  • the switching valves 17, 18 connect the first hydraulic pitch 11a to the second hydraulic pitch 11 b and block the connection to the closed hydraulic circuit 20.
  • the hydraulic auxiliary unit 12 is switched off and the traction drive is switched to standby with the pump 7 converts a mechanical torque into hydraulic power but still no power transmission to the
  • Hydromotors 9, 10 takes place.
  • the clutch 13 is closed and the pump 7 is already preset to a desired delivery rate.
  • the conveying capacity is set in the forward direction with plus, in the reverse direction with minus or out of state with zero.
  • the switching valve 14 closes the bypass of the
  • Low pressure side of the pump 7 in the first hydraulic pitch circle 11a to the hydraulic sump depends on the pivoting angle of the pump 7 and accordingly, the position one at the switching valve 15 and at a swivel angle minus the position two at the switching valve 15 is set at a swivel angle plus.
  • the switching position zero at the switching valve 15 blocks the connection from the first hydraulic pitch circle 1 1a to the hydraulic sump.
  • the switching valves 17, 18 connect the first hydraulic pitch 11a to the second hydraulic pitch 11 b and block the connection to the closed hydraulic circuit 20.
  • the hydraulic flow of the pump 7 flows in the hydraulic circuit 11 via the bypass of the hydraulic motors 9, 10 past the hydraulic motors 9, 10, so that no drive takes place.
  • Peripheral speed of a mechanically driven wheel is the
  • the switching valve 14 blocks the bypass of the hydraulic motors 9, 10, so that the
  • the switching valve 15 opens in the switching position one, the connection from the low pressure side of the pump 7 in the first hydraulic pitch circle 11 a to the hydraulic sump.
  • the switching valves 17, 18 connect the first hydraulic pitch 11a to the second hydraulic pitch 11 b and block the connection to the closed hydraulic circuit 20.
  • the hydraulic flow of the pump 7 flows in the hydraulic circuit 11 in the positive direction via the hydraulic motors 9, 10, which transmits a drive power in the forward direction.
  • Pivoting angle of the pump 7 is set in the negative direction with appropriate size.
  • the switching valve 14 blocks the bypass of the hydraulic motors 9, 10, so that the
  • the switching valve 15 opens in the switching position two the connection from the low pressure side of the pump 7 in the first hydraulic pitch circle 11 a to the hydraulic sump.
  • the switching valves 17, 18 connect the first hydraulic pitch 11a to the second hydraulic pitch 11 b and block the connection to the closed hydraulic circuit 20.
  • the hydraulic flow of the pump 7 flows in the hydraulic circuit 11 in the negative direction via the hydraulic motors 9, 10, which transmits a drive power in the reverse direction.
  • the clutch 13 is closed and the pivoting angle of the pump 7 is set to plus, so that a hydraulic flow in the positive direction in the first hydraulic pitch 11a is formed.
  • the switching valve 14 connects the bypass of the hydraulic motors 9, 10 with the hydraulic sump and the switching valve 15 opens in the switching position one, the connection from the first hydraulic pitch 11a on the low pressure side of the pump 7 to the hydraulic sump.
  • the switching valves 17, 18 connect the first hydraulic circuit 11a to the closed hydraulic circuit 20 and block the connection to the second hydraulic circuit 1 b.
  • the hydraulic flow of the pump 7 flows in a positive direction via the hydraulic motor 19, so that the hydraulic motor 19 is driven in a clockwise rotation.
  • the clutch 13 is closed and the pivot angle of the pump 7 is set to minus, so that a hydraulic flow in the negative direction in the first hydraulic pitch 11a is formed.
  • the switching valve 14 connects the bypass of the hydraulic motors 9, 10 with the hydraulic sump and the switching valve 15 opens in the switching position two the connection from the first hydraulic pitch 11a on the low pressure side of the pump 7 to the hydraulic sump.
  • the switching valves 17, 18 connect the first hydraulic circuit 11a with the closed hydraulic circuit 20 and block the connection to the second hydraulic circuit 11 b.
  • the hydraulic flow of the pump 7 flows in the negative direction via the hydraulic motor 19, so that the hydraulic motor 19 is driven in a left turn.
  • FIG. 4 shows a schematic representation of another inventive device
  • An auxiliary hydraulic unit 112 has a hydraulic piston 119 and is connected to the hydraulic circuit 111 via an open hydraulic circuit 120.
  • a pump 107 is detachably connected via a coupling 113 to a mechanical drive.
  • the hydraulic circuit 111 has hydraulic motors 109, 110, a
  • Hydraulikcroftcroftcroftkeitseinspeisevorraum 116 a switching valve 115 and a switching valve 114, which are already shown with the same function in Figure 2.
  • the same or equivalent components from FIG. 2 are adopted in FIG. 4 and have the same functionality without explicitly repeating them here.
  • the hydraulic auxiliary unit 112 has a hydraulic piston, which is designed as a telescopic cylinder 119.
  • the telescopic cylinder 119 is connected to the open hydraulic circuit 120 via a switching valve 121 and a switching valve 122.
  • a switching valve 117 is disposed on one side of the pump 107 between the pump 107 and the hydraulic motors 109, 110 and on the other Side of the pump 107 between the pump 107 and the hydraulic motors 109, 110, a switching valve 118 is arranged so that the hydraulic circuit 111 is divided by the switching valves 117, 118 in a first hydraulic pitch circle 111 a and in a second hydraulic pitch circle 111 b.
  • the pump 107 and the hydraulic fluid supply device 116 are connected to the first hydraulic circuit 111a.
  • the hydraulic motors 109, 110 and their bypass with the switching valve 114 are arranged.
  • the switching valve 117 and the switching valve 118 is the first hydraulic circuit 111 a with the open
  • hydraulic circuit 120 connectable, so that by the pump 107 of the
  • Telescopic cylinder 119 is extendable.
  • the switching valve 117 and the switching valve 18 are both designed as a 3/2 way valve, so that the switching valve 117 and the switching valve 118 in a switching position, the first hydraulic circuit 111 a with the second hydraulic circuit 11 b connects and the hydraulic circuit 111 via the
  • Hydromotors 09, 10 is closed.
  • the open hydraulic circuit 20 is separated from the first hydraulic circuit 111a.
  • the hydraulic flow of the pump 107 flows through the hydraulic motors 109, 110 or via the switching valve 114 at the
  • the open hydraulic circuit 120 is completely separated from the first hydraulic circuit 111a, so that no leaks and pressure changes in the open hydraulic circuit 120 and the telescopic cylinder 119 occur.
  • the hydraulic auxiliary unit 12 has a telescopic cylinder 119, which converts a hydraulic flow under high pressure into a linear power transmission.
  • the hydraulic flow of the pump 107 flows via the first hydraulic circuit 111 a and the switching valve 117 in the open hydraulic circuit 120. Via the switching valve 118, the pump 107 is connected through the first hydraulic circuit 111 a on the low pressure side with a hydraulic sump in the open hydraulic circuit 120 and draws via a check valve from the hydraulic sump hydraulic fluid after.
  • the switching valve 121 in the open hydraulic circuit 120 connects depending on
  • the open hydraulic circuit 120 with the telescopic cylinder 1 9 locks the connection to the hydraulic sump or connects the open hydraulic circuit 120 with the hydraulic sump or connects the open hydraulic circuit 120 with the hydraulic sump wherein the telescopic cylinder 119 is connected via an adjustable valve in the switching valve 121 to the hydraulic sump. If the telescopic cylinder 119 is adjustably connected to the hydraulic sump, a hydraulic flow from
  • Telescopic cylinder 119 are set to the hydraulic sump by a control or control so that the telescopic cylinder 119 by an external force, such as in particular a weight force of its own weight or a support, with expected speed lowers.
  • an external force such as in particular a weight force of its own weight or a support
  • Dump truck application In dump trucks, it is also necessary that a tipper trailer of a trailer by a hydraulic system of the dump truck is driven.
  • a switching valve 122 is still arranged, which conducts a hydraulic flow through the switching valve 122, depending on the switching position on the telescopic cylinder 119 or a hydraulic port 123.
  • To the hydraulic port 123 is another hydraulic auxiliary unit can be connected, which is analogous to the hydraulic auxiliary unit 112, which is given in particular at a dump truck on the dump truck and a dump truck on a trailer of a truck.
  • the switching valve 122 is also completely eliminated.
  • the switching valve 121 is so permanently connected to the telescopic cylinder 119 of the hydraulic auxiliary unit 112, which is a permanent switching position zero of
  • Switching valve 122 corresponds.
  • the switching valve 118 is replaceable by a permanent hydraulic line connection, wherein power losses of the switching valve 118 omitted and the number of components is reduced.
  • a check valve in the open hydraulic circuit 120 allows the pump 107 if necessary to draw hydraulic fluid on the low pressure side of the pump 107 from a hydraulic sump and locks the hydraulic sump in the open hydraulic circuit 120 against a hydraulic flow on the high pressure side of the pump 107.
  • About the hydraulic line connection are the first hydraulic
  • Partial circuits 111a, the second hydraulic partial circuits 111b and the open hydraulic circuit 120 are always connected to each other until the check valve, so that
  • FIG. 5 shows an overview of possible operating states of the hydraulic circuit 111 from FIG. 4.
  • the position of the clutch 113 as K113, the pump 107 as P107 and the respective switching positions of the switching valve 114 as V114 are tabular.
  • the switching valve 115 as V115
  • the switching valve 117 as V117
  • the switching valve 118 as V118
  • the switching valve 121 as V121
  • the switching valve 122 as V122.
  • the designation of the switching position refers in each case to the valves in FIG. 4:
  • an operating state is indicated symbolically, wherein the table contains the following operating states: for a traction drive HA, FS, FV, FR and for an operation TA, TH, TS, TAF, ZTA, ZTH, ZTS, ZTSF of a hydraulic additional unit 112
  • the operating states TA, TH, TS, TAF relate to the telescopic cylinder 1 19 and the operating states ZTA, ZTH, ZTS, ZTSF to an additional telescopic cylinder which is connected via the hydraulic connection 123.
  • Hydraulic flow in the hydraulic circuit 111 Hydraulic flow in the hydraulic circuit 111.
  • the switching valve 114 in the fifth column V1 5 is the switching valve 115, in the sixth column V117 the switching valve 117, in the seventh column V118 the switching valve 118, in the eighth column V121 the switching valve 121 and in the ninth Column V122, the switching valve 122 shown, wherein zero, one and two stands for a switching position of the respective switching valve of Figure 4.
  • Hydraulic connection 123 connects to the switching valve 121.
  • Hydromotors 109, 110 transmitted in the wheels of the motor vehicle or to the hydraulic auxiliary unit 112.
  • the clutch 113 is opened and the pump 107 is set to pump power zero.
  • the switching valve 114 connects the bypass of the Hydraulic motors 109, 110 with the hydraulic sump and the switching valve 115 blocks the connection from the second hydraulic circuit 111 b to the hydraulic sump.
  • the switching valves 117, 118 connect the first hydraulic circuit 1 11a with the second hydraulic circuit 11 1 b and block the connection to the open
  • the switching valve 121 connects the open hydraulic circuit 120 with the
  • Hydraulic sump and the switching valve 122 connects the telescopic cylinder 119 with the switching valve 121.
  • the hydraulic auxiliary unit 112 is switched off and the traction drive is switched to standby, wherein the pump 107 is a mechanical
  • Torque in hydraulic power converts but no power transfer to the hydraulic motors 109, 110 takes place.
  • the clutch 113 is closed and the pump 107 is already preset to a desired delivery rate.
  • the delivery rate is set to plus in the forward direction, to zero in the reverse direction or to zero out of the state.
  • the switching valve 114 closes the bypass of the hydraulic motors 109, 110, so that the hydraulic flow over the
  • the switching valve 115 opens the connection from the low pressure side of the pump 107 in the second hydraulic circuit 111 b to the hydraulic sump.
  • the low-pressure side of the pump 107 depends on the pivot angle of the pump 107 and accordingly, the position one at the switching valve 115 and at a swivel angle minus the position two at the switching valve 115 is set at a swivel angle plus.
  • At a pump power zero no hydraulic flow takes place under high pressure, so that the switching position zero on the switching valve 1 5 blocks the connection from the second hydraulic circuit 111 b to the hydraulic sump.
  • the switching valves 117, 118 connect the first hydraulic circuit 111a with the second hydraulic circuit 111 b and block the connection to the open
  • the switching valve 121 connects the open hydraulic circuit 120 with the
  • Hydraulic sump and the switching valve 122 connects the telescopic cylinder 119 with the switching valve 121.
  • the hydraulic flow of the pump 107 flows in the hydraulic circuit 111 via the bypass of the hydraulic motors 109, 110 past the hydraulic motors 109, 110, so that no drive takes place.
  • the hydraulic auxiliary unit 112 is turned off and closed for a traction drive in the forward direction, the clutch 113 and the
  • Pivoting angle of the pump 107 is set in the positive direction.
  • Peripheral speed of a mechanically driven wheel is the
  • the switching valve 114 blocks the bypass of the hydraulic motors 109, 110, so that the hydraulic flow must flow through the hydraulic motors 109, 110 and drives the hydraulic motors 109, 110.
  • the switching valve 115 opens in the switching position one, the connection from the low pressure side of the pump 107 in the second hydraulic circuit 111 b to
  • the switching valves 117, 118 connect the first hydraulic circuit 111 a with the second hydraulic circuit 111 b and block the connection to the open hydraulic circuit 120th
  • the switching valve 121 connects the open hydraulic circuit 120 with the
  • Hydraulic sump and the switching valve 122 connects the telescopic cylinder 119 with the switching valve 121.
  • the hydraulic flow of the pump 107 flows in the hydraulic circuit 111 in the positive direction via the hydraulic motors 109, 110, which transmits drive power in the forward direction.
  • Pivoting angle of the pump 107 is set in the negative direction with appropriate size.
  • the switching valve 114 blocks the bypass of the hydraulic motors 109, 110, so that the hydraulic flow through the hydraulic motors 109, 110 must flow and the
  • Hydromotors 109, 110 drives.
  • the switching valve 115 opens in the switching position two, the connection from the low pressure side of the pump 107 in the second hydraulic circuit 111 b to the hydraulic sump.
  • the switching valves 117, 118 connect the first hydraulic pitch 11a to the second hydraulic pitch 111b and block the connection to the open hydraulic circuit 120.
  • the switching valve 121 connects the open hydraulic circuit 120 with the
  • Hydraulic sump and the switching valve 122 connects the telescopic cylinder 119 with the switching valve 121.
  • the hydraulic flow of the pump 107 flows in the hydraulic circuit 111 in the negative direction via the hydraulic motors 109, 110, which transmits drive power in the reverse direction.
  • the clutch 113 is closed and the swing angle of the pump 107 is set to plus, so that a hydraulic flow in the positive direction in the first hydraulic circuit 111a is formed.
  • the switching valve 114 connects the bypass of the hydraulic motors 109, 1 0 with the hydraulic sump and the switching valve 115 locks in the switching position zero the connection from the second hydraulic circuit 111 b to the hydraulic sump.
  • the switching valves 117, 118 connect the first hydraulic circuit 111a to the open hydraulic circuit 120 and block the connection to the second
  • Hydraulic pitch circle 11 b Hydraulic pitch circle 11 b.
  • the switching valve 121 connects the open hydraulic circuit 120 via the switching valve 122 with the telescopic cylinder 119 and locks the connection to
  • the hydraulic flow of the pump 107 flows in a positive direction over the first
  • the telescopic cylinder 119 is by accumulating the
  • Hydraulic fluid extended under high pressure.
  • the clutch 113 is closed and the swing angle of the pump 107 is set to zero or plus, since no power transfer is necessary by check valves for holding the telescopic cylinder 119.
  • the switching valve 114 connects the bypass of the hydraulic motors 109, 110 with the hydraulic sump and the switching valve 115 locks in the switching position zero the connection from the second hydraulic circuit 111 b to the hydraulic sump.
  • the switching valves 117, 118 connect the first hydraulic circuit 11 1 a with the open hydraulic circuit 120 and block the connection to the second
  • the switching valve 121 connects the open hydraulic circuit 120 via the switching valve 122 with the telescopic cylinder 119 and locks the connection to
  • the clutch 113 may be open or closed and the swing angle of the pump 107 may be set to zero or plus.
  • the switching valve 114 connects the bypass of the hydraulic motors 109, 110 with the hydraulic sump and the switching valve 115 locks in the switching position zero, the connection from the second hydraulic pitch circle 1 11 b to the hydraulic sump.
  • the switching valves 117, 118 connect either the first hydraulic circuit 111a to the open hydraulic circuit 120 or connect the first hydraulic
  • Partial circle 111a with the second hydraulic pitch circle 111 b.
  • the switching valve 121 connects the open hydraulic circuit 120 with the
  • Hydraulic sump and connects via an adjustable valve in the switching valve 121 the
  • Telescopic cylinder 119 via the switching valve 122 with the hydraulic sump.
  • Telescope cylinder 119 flow into the hydraulic sump, with a control or
  • a flow rate of the hydraulic fluid is affected, so that a desired lowering speed of the telescopic cylinder
  • the hydraulic auxiliary drive path 103 is to the drive via the hydraulic motors 109, 110 available.
  • TSF in which the traction drive is switched on during the telescopic cylinder lowering, the clutch 113 is closed and the pivot angle of the pump 107 is set in the positive or negative direction.
  • the switching valve 114 blocks the bypass of the hydraulic motors 109, 110, so that the hydraulic flow must flow through the hydraulic motors 109, 110 and drives the hydraulic motors 109, 110.
  • the switching valve 115 opens the connection from the low pressure side of the pump 107 in the second hydraulic circuit 111 b to
  • the switching valves 117, 118 connect the first hydraulic partial circuit 111 a to the second hydraulic partial circuit 111 b and block the connection to the open hydraulic circuit 120.
  • the switching valve 121 connects in the switching position two the open hydraulic circuit 120 with the hydraulic sump and an adjustable valve in the switching valve 121, the telescopic cylinder 119 via the switching valve 122 to the hydraulic sump.
  • the switching positions of the clutch 113, the pump 107 and the switching valves 114, 115, 117, 118, 122 correspond to the switching positions of the operating states FV, FR for the traction drive in the forward direction or reverse direction. Only the switching position of the switching valve 121 changes from zero to two, so that parallel to the drive of the telescopic cylinder 119 can be lowered.
  • the operating states ZTA, ZTH, ZTS, ZTSF differ from the above-described operating states TA, TH, TS, TSF only in a switching position of the switching valve 122, so that only the differences are shown for these operating states.
  • the operating states TA, TH, TS, TSF all refer to the operation of the
  • Telescopic cylinder 119 which is connected directly via the switching valve 122 to the switching valve 121. Via a hydraulic connection 123 is another hydraulic
  • Additional unit can be connected, which has analog functions and operating states such as the telescopic cylinder 119.
  • the operating states ZTA, ZTH, ZTS, ZTSF therefore relate to an additional telescopic cylinder, which is connected via the hydraulic connection 123 with the open hydraulic circuit 120.
  • the switching position zero of the switching valve 122 connects the telescopic cylinder 119 with the switching valve 121 and the switching position one of the switching valve 122 connects the
  • the switching valve 122 connects in the switching position one the hydraulic connection 123 with the switching valve 121. All other switching positions of the operating state ZTA for extending the additional
  • Telescopic cylinder which is operated via the hydraulic connection 123, correspond to the operating state TA and are explained there.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

L'invention concerne un dispositif d'entraînement d'un véhicule à moteur, comportant une machine d'entraînement (1), une ligne d'entraînement mécanique principale (2) et une ligne d'entraînement hydraulique supplémentaire (3). La ligne d'entraînement hydraulique supplémentaire (3) comprend un circuit hydraulique (11) avec une pompe (7) hydrostatique réglable et des hydromoteurs (9,10) dans les roues qui ne peuvent pas être entraînées par la ligne d'entraînement mécanique. Un organe hydraulique supplémentaire (12) est relié à la pompe (7) de manière à être entraîné, par l'intermédiaire du circuit hydraulique (11). La pompe (7) est reliée à une sortie auxiliaire (8) de la machine d'entraînement (1) par l'intermédiaire d'un accouplement (13).
PCT/EP2010/007417 2010-03-06 2010-12-07 Véhicule à moteur doté d'un entraînement hydraulique supplémentaire Ceased WO2011110207A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010472.8 2010-03-06
DE201010010472 DE102010010472A1 (de) 2010-03-06 2010-03-06 Kraftfahrzeug mit einem hydraulischen Zusatzantrieb

Publications (1)

Publication Number Publication Date
WO2011110207A1 true WO2011110207A1 (fr) 2011-09-15

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PCT/EP2010/007417 Ceased WO2011110207A1 (fr) 2010-03-06 2010-12-07 Véhicule à moteur doté d'un entraînement hydraulique supplémentaire

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Country Link
DE (1) DE102010010472A1 (fr)
WO (1) WO2011110207A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729814A (zh) * 2012-06-27 2012-10-17 三一重工股份有限公司 工程机械车辆
CN112793417A (zh) * 2021-03-27 2021-05-14 福建鲲榕科技集团有限公司 抢险救援车负载液压动力传动系统

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
JP6049758B2 (ja) 2012-01-09 2016-12-21 イートン コーポレーションＥａｔｏｎ Ｃｏｒｐｏｒａｔｉｏｎ 単一入力を用いた最大域の持ち上げ速度達成方法
KR102445784B1 (ko) 2014-05-06 2022-09-21 단포스 파워 솔루션스 Ii 테크놀로지 에이/에스 유체정역학 옵션을 구비하는 유압 하이브리드 추진 회로 및 작동 방법
WO2016069485A1 (fr) 2014-10-27 2016-05-06 Eaton Corporation Circuit de propulsion hybride hydraulique à option hydrostatique et procédé de fonctionnement
FR3083839B1 (fr) * 2018-07-16 2020-10-23 Poclain Hydraulics Ind Circuit d'assistance hydraulique comprenant des moyens de gavage ameliores

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US4581949A (en) * 1983-09-15 1986-04-15 Zahnradfabrik Friedrichshafen Ag Hydrostatic/mechanical transmission system
DE4110161A1 (de) 1991-03-27 1992-10-01 Man Nutzfahrzeuge Ag Antriebseinrichtung fuer fahrzeuge
US5957235A (en) * 1994-03-07 1999-09-28 Komatsu Ltd. Traveling drive apparatus in a working vehicle
US5971092A (en) * 1995-08-16 1999-10-26 Frank H. Walker Vehicle drive system featuring split engine and accessory back drive
US6308441B1 (en) * 1998-12-15 2001-10-30 The Gradall Company Excavator
DE102004048475A1 (de) * 2004-10-05 2006-04-06 Linde Ag Antriebssystem für eine mobile Arbeitsmaschine, insbesondere Flurförderzeug

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Publication number Priority date Publication date Assignee Title
US4581949A (en) * 1983-09-15 1986-04-15 Zahnradfabrik Friedrichshafen Ag Hydrostatic/mechanical transmission system
DE4110161A1 (de) 1991-03-27 1992-10-01 Man Nutzfahrzeuge Ag Antriebseinrichtung fuer fahrzeuge
US5957235A (en) * 1994-03-07 1999-09-28 Komatsu Ltd. Traveling drive apparatus in a working vehicle
US5971092A (en) * 1995-08-16 1999-10-26 Frank H. Walker Vehicle drive system featuring split engine and accessory back drive
US6308441B1 (en) * 1998-12-15 2001-10-30 The Gradall Company Excavator
DE102004048475A1 (de) * 2004-10-05 2006-04-06 Linde Ag Antriebssystem für eine mobile Arbeitsmaschine, insbesondere Flurförderzeug

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729814A (zh) * 2012-06-27 2012-10-17 三一重工股份有限公司 工程机械车辆
CN112793417A (zh) * 2021-03-27 2021-05-14 福建鲲榕科技集团有限公司 抢险救援车负载液压动力传动系统

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