GB1321036A - Hydraulic shifting devices for gears shifted under load - Google Patents

Hydraulic shifting devices for gears shifted under load

Info

Publication number
GB1321036A
GB1321036A GB1614172A GB1614172A GB1321036A GB 1321036 A GB1321036 A GB 1321036A GB 1614172 A GB1614172 A GB 1614172A GB 1614172 A GB1614172 A GB 1614172A GB 1321036 A GB1321036 A GB 1321036A
Authority
GB
United Kingdom
Prior art keywords
shift
pistons
valves
pressure
valve
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.)
Expired
Application number
GB1614172A
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen 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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB1321036A publication Critical patent/GB1321036A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/18—Propelling the vehicle
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/10—Change speed gearings
    • B60W2710/1005—Transmission ratio engaged

Abstract

1321036 Change speed control ZAHNRADFABRIK FRIEDRICHSHAFEN AG 7 April 1972 [10 April 1971] 16141/72 Heading F2D Shift-valves 20, 21, 22 are shifted left, to supply throttle-regulated main pressure 3, 8 to engage first, second and third ratio clutches 56, 66, 76, by fluid pressure supplied to their right ends by energizing solenoids 16, 17, 18 of respective relay valves 10, 11, 12, and the shift-valves 20, &c. remain in their operative position after de-energization of their corresponding relay valve 10, &c., by their own clutch-engaging pressure acting on a differential area 52 of their shift spools 42, until, during a shift, following energization of another relay valve 10, &c. and its shift valve 20 &c., pressure builds up in the newly selected clutch and acts through lines 68, 68A or 68B, on pistons 43, 44, &c., to shift back to the right the shift valve 20, &c. of the superseded clutch. This pressure reaches the faces of the pistons 43, 44, &c. through axial apertures in the pistons. Further pistons 45 act similarly when receiving neutralizing pressure supplied through a line 37 in the idle position of the relay valves 16, 18.
GB1614172A 1971-04-10 1972-04-07 Hydraulic shifting devices for gears shifted under load Expired GB1321036A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2117608A DE2117608C3 (en) 1971-04-10 1971-04-10 Hydraulic switching device for powershift transmissions

Publications (1)

Publication Number Publication Date
GB1321036A true GB1321036A (en) 1973-06-20

Family

ID=5804456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1614172A Expired GB1321036A (en) 1971-04-10 1972-04-07 Hydraulic shifting devices for gears shifted under load

Country Status (7)

Country Link
BE (1) BE781829A (en)
DE (1) DE2117608C3 (en)
FR (1) FR2133429A5 (en)
GB (1) GB1321036A (en)
IT (1) IT975682B (en)
NL (1) NL7204325A (en)
SE (1) SE368262B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2846650C2 (en) * 1978-10-26 1985-07-18 Claas Ohg, 4834 Harsewinkel Large baler for crops with an almost cylindrical wrapping area
DE3239927A1 (en) * 1982-10-28 1984-05-03 Porsche Ag DEVICE FOR CONTROLLING A FOLLOW-UP ACTUATION FOR A DOUBLE CLUTCH
DE102007023072B4 (en) * 2007-05-16 2017-02-23 Volkswagen Ag Hydraulic control device for a transmission

Also Published As

Publication number Publication date
BE781829A (en) 1972-07-31
NL7204325A (en) 1972-10-12
SE368262B (en) 1974-06-24
FR2133429A5 (en) 1972-11-24
DE2117608C3 (en) 1974-05-22
DE2117608B2 (en) 1973-10-25
IT975682B (en) 1974-08-10
DE2117608A1 (en) 1972-10-19

Similar Documents

Publication Publication Date Title
GB1422543A (en) Hydraulically operated double clutches for reversing gearboxes
GB1447324A (en) Transmission assemblies
US3709064A (en) Multi-ratio transmission and control with downshift inhibitors
GB1435233A (en) Clutches with a fluid and cam operated pressure modulating valve
GB1094017A (en) Control for a power drive system
GB1337712A (en) Transmission controls
GB1249500A (en) Change gear transmission having brake means to facilitate shift and hydraulic control mechanism therefor
GB1095344A (en)
US2629265A (en) Transmission
GB1139535A (en) Transmission and control system therefor
US2012082A (en) Hydraulic gear shifting system
GB1096374A (en) Improvements in or relating to power transmissions for winches or the like
GB1166238A (en) Hydraulic Control System.
US3605507A (en) Automatic transmission
GB1427686A (en) Transmission controls
US3692160A (en) Fluid power control system for vehicles
US2689488A (en) Steering drive for vehicle transmissions
GB1321036A (en) Hydraulic shifting devices for gears shifted under load
GB1445377A (en) Hydraulic control circuit for vehicle automatic transmission
FR1454802A (en) Transmissions employing hydrodynamic coupling fitted as standard with a variable speed gearbox
US3091976A (en) Hydraulic controls for power transmission
GB1164239A (en) Control Valve System for a Power Shift Transmission for Agricultural and Industrial Tractors.
US3557918A (en) Apparatus for controlling the operation of a shift member and input clutch in a gear type transmission
GB1264110A (en)
US3618727A (en) Overlap valve

Legal Events

Date Code Title Description
PS Patent sealed
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee