CA2551947A1 - Load sense boost device - Google Patents

Load sense boost device Download PDF

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Publication number
CA2551947A1
CA2551947A1 CA002551947A CA2551947A CA2551947A1 CA 2551947 A1 CA2551947 A1 CA 2551947A1 CA 002551947 A CA002551947 A CA 002551947A CA 2551947 A CA2551947 A CA 2551947A CA 2551947 A1 CA2551947 A1 CA 2551947A1
Authority
CA
Canada
Prior art keywords
hydraulic
pressure
vehicle
signal
fluid
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
CA002551947A
Other languages
French (fr)
Other versions
CA2551947C (en
Inventor
Neil Vincent Harber
Darrel Jeffrey Rowan
Ryan Matthew Lutze
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of CA2551947A1 publication Critical patent/CA2551947A1/en
Application granted granted Critical
Publication of CA2551947C publication Critical patent/CA2551947C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30555—Inlet and outlet of the pressure compensating valve being connected to the directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7121—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in series

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Operation Control Of Excavators (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

A vehicle is disclosed having a hydraulic system. The hydraulic system includes a pressure regulator that maintains the output pressure from a hydraulic pump above a predetermined minimum pressure.

Claims (20)

1. A vehicle including a frame, a plurality of traction devices configured to propel the frame on the ground, a plurality of hydraulic actuators, brakes configured to control the speed of the vehicle, and a hydraulic control system including a pressure source providing pressurized hydraulic fluid, a load sense system detecting the maximum pressure needed by the plurality of hydraulic actuators during operation of the vehicle, a plurality of hydraulic controls controlling the supply of pressurized fluid to the plurality of hydraulic actuators, the plurality of hydraulic controls using the maximum pressure detected by the load sense system to regulate the pressure of the hydraulic fluid provided to the plurality of hydraulic actuators, a pressure source control coupled to the load sense system and pressure source to control the pressure output from the pressure source based on the maximum pressure detected by the load sense system, a load sense input to the load sense system that maintains the maximum pressure detected by the load sense system at least at a predetermined pressure, and a hydraulic fluid accumulator supplying pressurized fluid to the brakes.
2. The vehicle of claim 1, wherein the load sense input is a hydraulic signal received from the load sense system.
3. The vehicle of claim 1, wherein the plurality of hydraulic controls include a compensator that provides pressurized fluid from the pressure source to a corresponding one of the plurality of hydraulic actuators at a pressure that matches the needs of the corresponding hydraulic actuator.
4. The vehicle of claim 1, wherein the predetermined pressure is less than the output of the pressure source of pressurized hydraulic fluid.
5. The vehicle of claim 1, wherein the load sense system receives an indication of the pressure requirements of the plurality of hydraulic actuators and compares the pressure requirements to determine the maximum pressure needed by the plurality of hydraulic actuators.
6. The vehicle of claim 5, wherein the load sense system compares the load sense input to pressure requirements of the plurality of hydraulic actuators.
7. The vehicle of claim 1, wherein the hydraulic fluid accumulator provides fluid to the brakes when sufficient pressurized fluid is unavailable from the pressure source.
8. A vehicle including a frame, a plurality of traction devices configured to propel the frame on the ground, a plurality of hydraulic actuators, and a hydraulic control system including a hydraulic pump providing pressurized hydraulic fluid, a load sensor configured to detect the maximum pressure needed by the plurality of hydraulic actuators, the load sensor providing a signal indicative of the maximum pressure, the signal controlling the pressure of the hydraulic fluid output from the hydraulic pump, a plurality of pressure compensators provided for the plurality of hydraulic actuators, each of the pressure compensators providing pressurized fluid to at least one corresponding hydraulic actuators based on the signal from the load sensor and the necessary load pressure from the corresponding hydraulic actuator, and a signal regulator maintaining the signal above a predetermined level.
9. The vehicle of claim 8, wherein the signal is hydraulic.
10. The vehicle of claim 9, further including brakes configured to control the speed of the vehicle, wherein the hydraulic control system includes a hydraulic fluid accumulator providing pressurized fluid to the brakes when sufficient pressurized fluid is unavailable from the hydraulic pump.
11. The vehicle of claim 10, wherein pressure of the hydraulic signal is less than the pressure of the hydraulic fluid normally provided to the accumulator by the hydraulic pump.
12. The vehicle of claim 8, wherein the hydraulic control system further includes a pump control that uses the signal to control the output pressure of the hydraulic pump, the signal is hydraulic and the output pressure of the hydraulic pump is greater than the hydraulic signal.
13. The vehicle of claim 12, wherein the difference between the pressure of the hydraulic signal and the output pressure of the pump is substantially equal to a pressure drop between the outlet of the hydraulic pump and the input pressure to the plurality of pressure compensators.
14. The vehicle of claim 8, wherein the plurality of pressure compensators provide pressurized fluid to the corresponding hydraulic actuators at different pressures.
15. A vehicle including a frame, a plurality of traction devices configured to propel the frame on the ground, a plurality of hydraulic actuators, and a hydraulic control system including a pressure source providing pressurized hydraulic fluid, a plurality of hydraulic controls regulating the supply of pressurized fluid to the plurality of hydraulic actuators, a load sensor detecting the maximum pressure needed by the plurality of hydraulic actuators and providing a hydraulic signal indicative of the maximum pressure, a pump control receiving the hydraulic signal from the load sensor and controlling the output pressure from the source of pressurized fluid, and a load signal regulator maintaining the hydraulic signal above a predetermined level that is less than the output pressure of the source of pressurized fluid.
16. The vehicle of claim 15, wherein the load signal regulator is a pressure reducing valve.
17. The vehicle of claim 15, further including brakes configured to control the speed of the vehicle, wherein the hydraulic control system further includes an accumulator providing pressurized fluid to the brakes when sufficient pressurized fluid is unavailable from the pressure source, the normal minimum pressure provided to the accumulator being enough to apply the brakes a predetermined number of times.
18. The vehicle of claim 17, wherein the load signal regulator provides a pressure signal to the load sensor that is less than the normal minimum pressure provided to the accumulator.
19. The vehicle of claim 15, wherein the plurality of fluid supply controls receives the hydraulic signal.
20. The vehicle of claim 15, wherein the plurality of fluid supply controls provide hydraulic fluid to the plurality of hydraulic actuators at different pressures.
CA2551947A 2005-07-21 2006-07-13 Load sense boost device Expired - Fee Related CA2551947C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/186,562 2005-07-21
US11/186,562 US7415822B1 (en) 2005-07-21 2005-07-21 Load sense boost device

Publications (2)

Publication Number Publication Date
CA2551947A1 true CA2551947A1 (en) 2007-01-21
CA2551947C CA2551947C (en) 2010-05-11

Family

ID=37682450

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2551947A Expired - Fee Related CA2551947C (en) 2005-07-21 2006-07-13 Load sense boost device
CA002552060A Abandoned CA2552060A1 (en) 2005-07-21 2006-07-14 Load sense boost device

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002552060A Abandoned CA2552060A1 (en) 2005-07-21 2006-07-14 Load sense boost device

Country Status (2)

Country Link
US (2) US7415822B1 (en)
CA (2) CA2551947C (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7415822B1 (en) * 2005-07-21 2008-08-26 Deere & Company Load sense boost device
JP5074086B2 (en) * 2007-04-26 2012-11-14 株式会社小松製作所 Construction vehicle
US7726125B2 (en) * 2007-07-31 2010-06-01 Caterpillar Inc. Hydraulic circuit for rapid bucket shake out
DE502008002003D1 (en) * 2008-08-20 2011-01-20 Hawe Hydraulik Se Hydraulic control for a hydraulic motor
US7793740B2 (en) * 2008-10-31 2010-09-14 Caterpillar Inc Ride control for motor graders
AU2009353980B2 (en) 2009-10-12 2014-07-10 Deere And Company Load sense hydraulic pump alignment
FR2964711B1 (en) * 2010-09-13 2012-10-12 Poclain Hydraulics Ind IMPROVED BREAKER CIRCUIT BREAKER
US8412420B2 (en) 2010-12-14 2013-04-02 Deere & Company Wheel lean control
US9545062B2 (en) * 2012-09-13 2017-01-17 Deere & Company Integrated hydraulic system for harvester
US9131674B2 (en) 2012-09-28 2015-09-15 Deere & Company Trailed agricultural implement pump with hydraulic flow rate control
US9194791B2 (en) * 2012-10-18 2015-11-24 Caterpillar Inc. System for determining coefficients of seal friction
JP5511933B2 (en) * 2012-11-07 2014-06-04 カヤバ工業株式会社 Hydraulic control device
JP6643913B2 (en) * 2016-02-16 2020-02-12 株式会社クボタ Hydraulic block
JP6581931B2 (en) * 2016-03-23 2019-09-25 株式会社小松製作所 Control method and motor grader in motor grader

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4537029A (en) * 1982-09-23 1985-08-27 Vickers, Incorporated Power transmission
US5513985A (en) * 1994-03-18 1996-05-07 Robertson; Walter H. Dental impression tray
US5513958A (en) * 1994-05-03 1996-05-07 Caterpillar Inc. Accumulator charging valve
US5579642A (en) * 1995-05-26 1996-12-03 Husco International, Inc. Pressure compensating hydraulic control system
US6460655B2 (en) 2001-01-18 2002-10-08 Deere & Company Vehicle hydraulic system
US6672399B2 (en) 2001-10-19 2004-01-06 Deere & Company Hydraulic diverting system for utility vehicle
US6644429B2 (en) 2002-01-28 2003-11-11 Deere & Co Hydrostatic auxiliary drive system
DE10345956A1 (en) 2003-10-02 2005-04-21 Deere & Co Hydraulic arrangement and method for such
US7047735B2 (en) 2004-07-30 2006-05-23 Deere & Company Increasing hydraulic flow to tractor attachments
US7415822B1 (en) * 2005-07-21 2008-08-26 Deere & Company Load sense boost device

Also Published As

Publication number Publication date
US20080202111A1 (en) 2008-08-28
CA2551947C (en) 2010-05-11
US7866150B2 (en) 2011-01-11
CA2552060A1 (en) 2007-01-21
US7415822B1 (en) 2008-08-26
US20080307783A1 (en) 2008-12-18

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EEER Examination request
MKLA Lapsed

Effective date: 20180713