GB1392484A – Vehicle drive system
– Google Patents
GB1392484A – Vehicle drive system
– Google Patents
Vehicle drive system
Info
Publication number
GB1392484A
GB1392484A
GB2765772A
GB2765772A
GB1392484A
GB 1392484 A
GB1392484 A
GB 1392484A
GB 2765772 A
GB2765772 A
GB 2765772A
GB 2765772 A
GB2765772 A
GB 2765772A
GB 1392484 A
GB1392484 A
GB 1392484A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
clutch
torque
piston
Prior art date
1971-06-29
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
GB2765772A
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.)
Voith Getriebe KG
Original Assignee
Voith Getriebe KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1971-06-29
Filing date
1972-06-13
Publication date
1975-04-30
1972-06-13
Application filed by Voith Getriebe KG
filed
Critical
Voith Getriebe KG
1975-04-30
Publication of GB1392484A
publication
Critical
patent/GB1392484A/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
F16H45/00—Combinations of fluid gearings for conveying rotary motion with couplings or clutches
Abstract
1392484 Clutch control; variable speed gear; clutches VOITH GETRIEBE KG 13 June 1972 [29 June 1971] 27657/72 Headings F2L F2D and F2C In a vehicle (such as a fork lift truck) drive system wherein an engine 10 drives the vehicle wheels via a clutch 20 and a torque converter 20 regulating means are provided (valves 52, 60) to vary the hydraulic pressure supplied to a piston 24 which actuates the clutch 20 so that for any position of a clutch pedal 50 a constant output torque is maintained, irrespective of engine speed, the engine 10 also driving a hydrostatic pump 15 for auxiliary services. A pump 40, driven by the engine 10, supplies a constant pressure (regulated by valve 41) through a pressure reduction valve 52 and a shut off valve 56 (open with the clutch pedal in position a) to the clutch actuating piston 24. Movement of the pedal 50 to position b diverts the flow through a valve 60 having a piston 64, one side of which being acted on by the pressure in line 43 (from valve 52) and the opposite side 61 being acted on by a piston 65 which is connected to measure the pressure difference across the impeller 34 of the converter through conduits 66, 67, the valve 60 is thus closed or opened in response to this pressure which is a measurement of the output torque. Further movement of pedal 50 past position b starts to close valve 52 and reduce the pressure to the clutch, and also the control pressure to one side of valve 60 so that this valve maintains the torque constant by variation of pressure. For very large amounts of slippage of clutch 20 the chamber 23 may only be partially filled and in this instance the valve 60 is acting as a flow control, rather than a pressure control valve, there being a constant flow through the chamber 23 (via throttle 27) to an oil reservoir. In a further embodiment the pedal 50 acts directly (through a spring) on-the left side of a valve equivalent to valve 60 (Fig. 2, not shown) and the opposite side of the piston of the valve is acted on by a pressure which reduces as torque increases (the opposite to the operation of Fig. 1). A yet further embodiment has the supply of fluid to the torque converter (through line 37 in Fig. 1) (Fig. 3, not shown) via a pressure relief valve so that the input side of impeller 34 is at constant pressure and the output side pressure may be taken as a measure of torque (this dispensing with the need for piston 65 of Fig. 1). The clutch 20 may be connected to the ring gear of planetary gearing (Fig. 3, not shown) whose planet carrier is directly connected to output and whose sun gear is connected to the converter impeller, the turbine (36 in Fig. 1) being interconnected with the planet carrier through further planetary gearing on the opposite side of the converter from the clutch. A stop 57. for the clutch pedal may be provided such that some torque is transmitted even with it fully depressed. The clutch may act opposite from that shown and be engaged by springs (instead of released) and disengaged by fluid pressure, this requiring a reversal of the operation of most of the control features.
GB2765772A
1971-06-29
1972-06-13
Vehicle drive system
Expired
GB1392484A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE2132144A
DE2132144B2
(en)
1971-06-29
1971-06-29
Hydrodynamic vehicle drive, in particular for a forklift
Publications (1)
Publication Number
Publication Date
GB1392484A
true
GB1392484A
(en)
1975-04-30
Family
ID=5812048
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2765772A
Expired
GB1392484A
(en)
1971-06-29
1972-06-13
Vehicle drive system
Country Status (8)
Country
Link
US
(1)
US3948367A
(en)
JP
(1)
JPS5638412B1
(en)
BE
(1)
BE785614A
(en)
CA
(1)
CA971859A
(en)
DE
(1)
DE2132144B2
(en)
FR
(1)
FR2144369A5
(en)
GB
(1)
GB1392484A
(en)
IT
(1)
IT959269B
(en)
Families Citing this family (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE3000968A1
(en)
*
1980-01-12
1981-07-23
Voith Getriebe Kg
HYDRODYNAMIC REVERSE GEAR
DE3105239C2
(en)
*
1981-02-13
1982-12-02
Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen
Actuating device for a clutch
JPS596462A
(en)
*
1982-07-01
1984-01-13
Honda Motor Co Ltd
Automatic transmission for vehicle
DE3421387A1
(en)
*
1984-06-08
1985-12-12
Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover
Clutch control for motor vehicle
DE3627370A1
(en)
*
1986-08-12
1988-02-25
Voith Gmbh J M
HYDRODYNAMIC TORQUE CONVERTER
JP2000504402A
(en)
*
1996-12-04
2000-04-11
フォイト トゥルボ ゲーエムベーハー ウント コンパニー コマンディトゲゼルシャフト
Operating method of transmission unit, transmission unit and hydraulic unit incorporated in drive train
US9234583B2
(en)
*
2007-07-17
2016-01-12
Ford Global Technologies, Llc
Hydraulic supply system for torque converter impeller clutch
DE102010018160B3
(en)
*
2010-04-22
2011-09-29
Voith Patent Gmbh
Hydrodynamic transducer i.e. torque converter, for rail vehicle, has chamber for formation of circuit flow of medium, where direction of incident flow and/or outflow of medium of circuit flow partially extends in axial direction
Family Cites Families (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3202018A
(en)
*
1962-08-16
1965-08-24
Twin Disc Clutch Co
Power transmission
US3384209A
(en)
*
1966-03-24
1968-05-21
Borg Warner
Modulated fluid clutch in series with fluid coupling
1971
1971-06-29
DE
DE2132144A
patent/DE2132144B2/en
active
Granted
1972
1972-06-13
GB
GB2765772A
patent/GB1392484A/en
not_active
Expired
1972-06-22
US
US05/265,286
patent/US3948367A/en
not_active
Expired – Lifetime
1972-06-27
CA
CA145,791A
patent/CA971859A/en
not_active
Expired
1972-06-28
IT
IT69080/72A
patent/IT959269B/en
active
1972-06-28
FR
FR7223431A
patent/FR2144369A5/fr
not_active
Expired
1972-06-29
BE
BE785614A
patent/BE785614A/en
not_active
IP Right Cessation
1972-06-29
JP
JP6537572A
patent/JPS5638412B1/ja
active
Pending
Also Published As
Publication number
Publication date
US3948367A
(en)
1976-04-06
CA971859A
(en)
1975-07-29
BE785614A
(en)
1972-10-16
JPS5638412B1
(en)
1981-09-07
DE2132144C3
(en)
1974-04-18
DE2132144A1
(en)
1973-01-18
FR2144369A5
(en)
1973-02-09
IT959269B
(en)
1973-11-10
DE2132144B2
(en)
1973-09-27
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Legal Events
Date
Code
Title
Description
1975-09-10
PS
Patent sealed [section 19, patents act 1949]
1988-02-03
PCNP
Patent ceased through non-payment of renewal fee
