GB1248594A – Improvements in or relating to vehicles having forward-reverse drive control
– Google Patents
GB1248594A – Improvements in or relating to vehicles having forward-reverse drive control
– Google Patents
Improvements in or relating to vehicles having forward-reverse drive control
Info
Publication number
GB1248594A
GB1248594A
GB58811/68A
GB5881168A
GB1248594A
GB 1248594 A
GB1248594 A
GB 1248594A
GB 58811/68 A
GB58811/68 A
GB 58811/68A
GB 5881168 A
GB5881168 A
GB 5881168A
GB 1248594 A
GB1248594 A
GB 1248594A
Authority
GB
United Kingdom
Prior art keywords
valve
shift
pressure
comparator
line
Prior art date
1967-12-11
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.)
Expired
Application number
GB58811/68A
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.)
Navistar Inc
Original Assignee
International Harverster Corp
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.)
1967-12-11
Filing date
1968-12-11
Publication date
1971-10-06
1968-12-11
Application filed by International Harverster Corp
filed
Critical
International Harverster Corp
1971-10-06
Publication of GB1248594A
publication
Critical
patent/GB1248594A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
F16H61/02—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 characterised by the signals used
F16H61/0262—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 characterised by the signals used the signals being hydraulic
F16H61/0265—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
F16H61/0272—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 characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals characterised by initiating reverse gearshift
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
B60T7/00—Brake-action initiating means
B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
B60W10/00—Conjoint control of vehicle sub-units of different type or different function
B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
B—PERFORMING OPERATIONS; TRANSPORTING
B60—VEHICLES IN GENERAL
B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
B60W10/00—Conjoint control of vehicle sub-units of different type or different function
B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
B—PERFORMING OPERATIONS; TRANSPORTING
B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B62D—MOTOR VEHICLES; TRAILERS
B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
Abstract
1,248,594. Change speed control. INTERNATIONAL HARVESTER CO. 11 Dec., 1968 [11 Dec., 1967], No. 58811/68. Heading F2D. A motor-vehicle, particularly one such as a loader or tractor requiring frequent and rapid reversal, with fluid pressure gear shift, has a comparator valve CD which, when the vehicle is travelling in one direction above a predetermined «on-run» speed, and the operator commands a shift to the opposite direction, compares the command signal with the direction of travel, neutralizes the transmission, applies the service brakes, and, when vehicle speed falls below the no-run speed, determined by an output-driven reversible detector pump 22, fed from a single reservoir 152, releases the brakes and engages the reversed drive. The tracked vehicle shown has two speeds in each direction, and a disc-brake for each trackpinion drive, which brakes are applied together for service and selectively for steering, with or without power assistance. The comparator valve CD is in a triple valveblock containing also shift valves F 1 , F 2 and R 1 , R 2 controlling the supply of main pressure M from a chamber 110 to the respective ratioestablishing clutch-packs F 1 , F 2 and R 1 , R 2 at E, not further described, the shift-valves being selectively shifted in the appropriate direction from a spring-centralized neutral position by fluid pressure supplied from the main M through a manual selector valve 20. The ported spool 20a, 20b of the manual valve can be turned in one plane for directional shift, and then moved axially to select the two ratios in each direction by a manual lever, Fig. 3, not shown, moving in a U-gate, the two limbs of the U providing the two forward and two reverse ratios respectively the transverse branch providing three neutral positions, the centre absolute neutral (as shown), the ends neutral but preselecting the direction determined by the adjacent limb. Action of the comparator valve CD is as follows. The valve is maintained in a central position, shown, supplying main pressure M to the shift-valve supply chamber 110, by a combination of spring-load 122, 138 and hydraulic loading on its end faces. Below norun speed the springs overcome any differential hydraulic end loading and maintain the central position permitting unimpeded direction change. Above no-run speed, detector pump pressure 22 is applied to both ends of the comparator valve CD for unimpeded gear shift by fluid pressure shift of the shift valves F 1 , F 2 , R 1 , R 2 , unless a change of direction is selected, whereupon the manual selector valve 20 exhausts one or other end of the comparator valve CD, as detailed below, causing axial movement of the valve CD in one or other direction. This exhausts the chamber 110 supplying the shift valves F 1 , F 2 , R 1 , R 2 , thus neutralizing the transmission, and also exhausts a service-brake release-line 108 causing the brakes to be applied gradually through a one-way restrictor 100. When output speed falls to the no-run value, the consequent fall of detector pump pressure allows the springs 122, 138 to re-centralize the comparator valve CD, restoring main pressure M to the shift-valve supply chamber 110, permitting the reverse shift to be established and the brake-re lease line to be rapidly re-pressurized. In detail this comparator valve action is as follows. With the vehicle running forward or reverse, pressure developed in the appropriate direction by the output-driven detector pump 22 is applied directly to one end of the comparator valve CD through one half of a double checkvalve 102 or 136, according to the direction of pump pressure, and indirectly to the opposite end of the comparator valve CD, through a path including a non-return valve 132 or 156, line J, manual selector valve 20, line R or F according to direction, and the other half of the double non-return valve 102 or 136. If the operator commands a manual shift without change of direction, there is no turning movement of the selector valve 20 and pressure from the line J completes the indirect path to the opposite end of the comparator through the shift-valve 20, as noted above. The comparator valve CD is thereby maintained in hydraulic balance and is without effect. If the operator commands a shift to the opposite direction, the consequent turning of the manual valve 20 disconnects the line J from the line F or R and exhausts that line at D, thus removing the hydraulic load from one end of the comparator valve CD. The latter then moves in the direction of the exhausted end if detector-pump pressure 22, as determined by a pre-set regulator 134 for the desired no-run speed, is above that of the valvecentralizing springs 122, 138. This movement of the comparator valve CD, in either direction, exhausts to an intermediate-pressure lubricating line L, the shift-valve supply chamber 110, thus neutralizing the transmission, and at the same time, exhausting a service-brake release line 108, permitting main pressure M, acting through a one-way restrictor 158, to apply the service-brake gradually through a piston 98. This condition persists until vehicle speed falls below the set no-run value of the detector pump 22 whereupon the springs 122, 138 overcome detector-pump pressure and re-centralize the comparator valve CD, pressurizing the shiftvalve supply-chamber 110 to restore gear-shift, pressure and also brake-release pressure 108, completing the reversal. Restrictors 160, 162 maintain a residual lubricating pressure in the clutch-packs E, when disengaged.
GB58811/68A
1967-12-11
1968-12-11
Improvements in or relating to vehicles having forward-reverse drive control
Expired
GB1248594A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US68954967A
1967-12-11
1967-12-11
Publications (1)
Publication Number
Publication Date
GB1248594A
true
GB1248594A
(en)
1971-10-06
Family
ID=24768956
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB58811/68A
Expired
GB1248594A
(en)
1967-12-11
1968-12-11
Improvements in or relating to vehicles having forward-reverse drive control
Country Status (3)
Country
Link
US
(1)
US3458018A
(en)
DE
(1)
DE1813527B2
(en)
GB
(1)
GB1248594A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN106949174A
(en)
*
2017-04-17
2017-07-14
常州机电职业技术学院
Clutch master cylinder
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3831721A
(en)
*
1967-12-11
1974-08-27
Int Harvester Co
Dump valve and forward-reverse drive control employing same
US3858696A
(en)
*
1967-12-11
1975-01-07
Int Harvester Co
Forward reverse drive control providing automatic braking
US3741360A
(en)
*
1971-12-29
1973-06-26
Clark Equipment Co
Pump controlled pressure modulator for reversing clutches
US3841450A
(en)
*
1973-03-16
1974-10-15
Fiat Allis Construct Machine
Spring applied steering brakes controlled by transmission clutch pressure
US3837449A
(en)
*
1973-05-07
1974-09-24
Fiat Allis Construct Machine
Transmission controlled spring applied steering brakes
US3854559A
(en)
*
1973-10-01
1974-12-17
Deere & Co
Control system for a hydraulically-operable brake and transmission
US3910389A
(en)
*
1974-04-02
1975-10-07
Eaton Corp
Control for applying brake during transmission shifts
US3982470A
(en)
*
1975-08-04
1976-09-28
Abex Corporation
Control system for axial piston fluid energy translating device
US4138903A
(en)
*
1977-10-05
1979-02-13
Massey-Ferguson Inc.
Hydrostatic transmission control
US4195472A
(en)
*
1978-02-08
1980-04-01
General Motors Corporation
Gas turbine with forward and reverse marine drive
JPS55165832U
(en)
*
1979-05-16
1980-11-28
KR100305834B1
(en)
*
1999-02-06
2001-09-13
이계안
Shift lover system for antomotivz transmission
DE10250730A1
(en)
*
2001-12-08
2003-06-18
Daimler Chrysler Ag
System with motor vehicle gearbox produces braking torque to reduce speed via actuator and braking units when changing travel direction while there is still positive speed in first direction
Family Cites Families (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US1141295A
(en)
*
1914-01-31
1915-06-01
Edward Wright
Tractor operated by internal-combustion engine.
US2148326A
(en)
*
1937-10-18
1939-02-21
Leblond Mach Tool Co R K
Combined clutch and brake device
US2573152A
(en)
*
1948-09-13
1951-10-30
Gisholt Machine Co
Forward and reverse drive for lathe spindles
US2885043A
(en)
*
1953-04-22
1959-05-05
Koehring Co
Automatic driving mechanism
US3003606A
(en)
*
1958-03-14
1961-10-10
Hindmarch Thomas
Reversing transmission assemblages
US2961078A
(en)
*
1958-04-23
1960-11-22
Vickers Electrical Co Ltd
Reversing gear for unidirectional gas turbine drives
US3132729A
(en)
*
1962-10-05
1964-05-12
Claude B Garland
Forward and reverse transmission with brake
US3348644A
(en)
*
1965-07-19
1967-10-24
Twin Disc Clutch Co
Control for a power drive system and including shift-restricting inhibitors for a reversible transmission
US3332298A
(en)
*
1965-08-04
1967-07-25
Machinery Company Const
Transmission control system
US3354994A
(en)
*
1966-02-01
1967-11-28
Caterpillar Tractor Co
Transmission locking means
US3400790A
(en)
*
1966-02-03
1968-09-10
Charles A.L. Ruhl
Valve and motor-brake controls operated thereby
1967
1967-12-11
US
US689549A
patent/US3458018A/en
not_active
Expired – Lifetime
1968
1968-12-09
DE
DE1813527A
patent/DE1813527B2/en
active
Granted
1968-12-11
GB
GB58811/68A
patent/GB1248594A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN106949174A
(en)
*
2017-04-17
2017-07-14
常州机电职业技术学院
Clutch master cylinder
Also Published As
Publication number
Publication date
US3458018A
(en)
1969-07-29
DE1813527A1
(en)
1969-07-03
DE1813527C3
(en)
1974-05-16
DE1813527B2
(en)
1973-10-18
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Legal Events
Date
Code
Title
Description
1972-02-16
PS
Patent sealed [section 19, patents act 1949]
1978-07-19
PCNP
Patent ceased through non-payment of renewal fee
