Classifications

• • 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
  • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
  • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of fluid gearing
• • 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
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
  • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
  • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/20—Drives; Control devices
  • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
  • E02F9/2062—Control of propulsion units
  • E02F9/2075—Control of propulsion units of the hybrid type
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/20—Drives; Control devices
  • E02F9/22—Hydraulic or pneumatic drives
  • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/20—Drives; Control devices
  • E02F9/22—Hydraulic or pneumatic drives
  • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02F—DREDGING; SOIL-SHIFTING
  • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
  • E02F9/20—Drives; Control devices
  • E02F9/22—Hydraulic or pneumatic drives
  • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
  • E02F9/2267—Valves or distributors
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles

Definitions

• the present invention relates generally to vehicle powertrain systems and, in particular, to a hydraulic hybrid powertrain system. More specifically, the present invention is directed to a hydraulic hybrid powertrain system for an earthmover.
• variable-displacement pump is more efficient than a gear pump because it only pumps the amount of oil that the hydraulic system needs. When none of the hydraulic rams are operating, the pump simply stops pumping oil. This reduces the fuel consumption of the backhoe a good deal.
• Earth movers to date provide the rapid development of roads, buildings and civic projects, however, they consume large amounts of fuel for the amount of work they do.
• the resolution is preferably to make it possible for these vehicles to become more efficient and less polluting while maintaining the current performance level.
• the present invention provides a series hybrid powertrain system that obtains this needed efficiency improvement by breaking the power train into three distinct parts: the first section provides a power plant, consisting of an engine and a variable displacement pump; the second section provides the energy storage obtained in this hybrid with an accumulator; and the third section provides a drive system preferably comprising two separate drive systems as each side of this preferred embodiment is independently controlled to allow steering without changing the relationship of the wheels.
• a hydraulic hybrid powertrain system in accordance with the present invention is indicated generally at 10.
• the powertrain system 10 may be utilized in a variety of installations, such as, but not limited to, an automotive vehicle, a boat, a submarine, a helicopter, an earthmover or the like as will be appreciated by those skilled in the art, but for clarity will be referred to as if installed in an automotive vehicle in the following description of the present invention.
• the powertrain system 10 includes a power plant section 11, a mode selector module 43, a control section 59, and a power delivery section 76.
• the second piston 136 and the first piston 112 are mounted on the upper surface and the lower surface, respectively of the lower mandrel 110.
• the downwardly extending flange 144 cooperates with the upwardly extending inner flange 120 to divide the interior of the external gear into an inlet chamber and discharge chamber of the motor 100 and the upper end cap 106 is attached to the base portion 104 to enclose the housing 102.
• the flanges 120 and 144 extend radially between the teeth 126 and the teeth 130 to form the inlet chamber on one side of the flanges and the discharge chamber on the other side of the flanges.
• the shaft 134 is connected to a load (not shown), such as a wheel of a vehicle or the like. Pressured fluid is introduced from the fluid system such as from the high pressure conduit 20 of Figs.
• the second seal sleeve 228 is operable to be received in a recess in the fitting 230 adjacent the flange 232.
• the gear 214 is fixed axially with respect to the housing 202.
• a second thrust plate 242 is attached to an upper surface 205 of the first end cap 204 by a plurality of fasteners 244, such as high strength bolts or the like.
• the plate 242 includes an aperture for receiving a free end of the shaft 224 and a larger aperture for receiving and locating the first seal sleeve 226 adjacent the upper surface of the first end cap 204.
• the free end of the shaft 224 extends through the aperture in the plate 242, threadably engages a pair of nuts 246 at the step and is rotatably supported by a bearing 248, such as a ball bearing, a roller bearing or the like.
• the normal or default spatial relationship between the teeth 216 and 220 of the gears 214 and 218 is such that the teeth 216 and 220 engage substantially all of the axial area of the teeth.
• the pump 200 produces its maximum volume flow or maximum displacement.
• the pump 200 in accordance with the present invention may advantageously vary from its maximum displacement because the second gear 218 is axially movable along the shaft 224. When the second gear 218 moves towards the lower thrust plate 242, less of the axial area of the teeth 216 and 220 engage, which reduces the volume flow or displacement of the pump 200.
• an external source of pressure such as hydraulic fluid from an external hydraulic pump, compressed air from an air compressor or the like, provides a volume flow to the ports 252 and 254 to spin the gears 214 and 218 and produce an output torque on the shaft 224.
• the second gear 218 will move along the axis of the shaft 224 in order to vary the output horsepower of the motor 200.
• the motor 200 may be advantageously utilized to control output rpm under widely changing output loads including, but not limited to automotive vehicles, turrets, large machinery, earth movers, large well drills, ships, farm equipment, or the like.
• the check valve bridge circuit 82 will allow flow to the conduit 98 only from the conduit 92 through the check valve 84 or from the conduit 96 via the check valve 90, which will only occur when the pressure in the conduits 56 and 92 or the conduits 58 and 96 are greater than the pressure in the conduit 98. If the pressure in the conduit 92 is less than the pressure in the conduit 98 and the conduit 94, the check valve 86 will open but since the conduit 94 is at a low pressure, no flow can occur from the reservoir 18 to the conduit 92.
• the check valve 88 will open but since the conduit 94 is at a low pressure, no flow can occur from the reservoir 18 to the conduit 96, and advantageously preventing high pressure hydraulic fluid from causing the motors 76a-76d to engage in a reverse direction after the vehicle has come to a complete stop.
• the throttle control module 40 Based on the condition or operating state of the air conditioning compressor 24, the power maintenance module 28, and the accumulator 38 (as determined by their respective signals on the lines 24a, 28a, and 38a), the throttle control module 40 sends a signal on the line 42 to start or stop the engine 12 and/or vary the displacement of the pump/motor 16.
• the accumulator 38 fills and the rate of flow from the pump/motor 16 is reduced.
• the flow of the pump/motor 16 continues to be reduced until the system pressure drops due to an output to the motors 76a-76d. If at any time the flow of the pump/motor 16 reaches zero flow, the engine 12 may be turned off until flow is again needed.
• the flow of the pump/motor 16 may also be reduced if an accessory requires power to prevent the engine 12 from stalling (assuming the accessory is clutched to the engine 12).
• the powertrain system 10 obtains its efficiency by averaging the rate of power consumption. Energy needed for intermittent bursts is supplied by the stored energy in the accumulator 38.
• the pump/motor 16 provides flow greater than the average flow needed to propel the vehicle. The extra flow created by the pump 16 is then stored in the accumulator 38.
• the hydraulic hybrid powertrain system 10 in accordance with the present invention advantageously providing an uncomplicated and straightforward control methodology and a very responsive control means for the system 10 by virtue of the fact that output torque response from the motors 76a-76d, once their displacement is increased, is very quick.
• FIG. 6 there is shown a schematic of the preferred series hybrid hydraulic system as described above implemented for use with an earthmover.
• the system 300 is divided into three distinct parts in fluid communication: the power plant 310, energy storage 312, and the drive system 314.
• the connectors 73, 75a-75d, and 80, and the signals on the lines 24a, 28a, 38a, and 42 may be any type of mechanical connector, such as a hydraulic line, a cable, a metal bar or the like, or an electrical signal communicating with solenoid valves or the like, while remaining within the scope of the present invention.

Landscapes

• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Fluid-Pressure Circuits (AREA)
• Control Of Fluid Gearings (AREA)
• Operation Control Of Excavators (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=38564283

Family Applications (1)

Country Status (5)

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Family Cites Families (7)

• 2007
  • 2007-04-02 EP EP07759936A patent/EP2001695A2/en not_active Withdrawn
  • 2007-04-02 BR BRPI0709780-8A patent/BRPI0709780A2/pt not_active IP Right Cessation
  • 2007-04-02 WO PCT/US2007/065760 patent/WO2007115247A2/en not_active Ceased
  • 2007-04-02 JP JP2009503331A patent/JP5152530B2/ja not_active Expired - Fee Related
  • 2007-04-02 CN CN2007800190964A patent/CN102112332A/zh active Pending

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