GB1208193A - Hydraulic control device for building up variable pressure in clutches or brakes acting as shift elements in a gearbox adapted to be shifted under load - Google Patents

Hydraulic control device for building up variable pressure in clutches or brakes acting as shift elements in a gearbox adapted to be shifted under load

Info

Publication number
GB1208193A
GB1208193A GB56479/68A GB5647968A GB1208193A GB 1208193 A GB1208193 A GB 1208193A GB 56479/68 A GB56479/68 A GB 56479/68A GB 5647968 A GB5647968 A GB 5647968A GB 1208193 A GB1208193 A GB 1208193A
Authority
GB
United Kingdom
Prior art keywords
brake
valve
supply
passage
pressure
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
GB56479/68A
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.)
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
Priority claimed from DE1650928A external-priority patent/DE1650928C3/en
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB1208193A publication Critical patent/GB1208193A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/16—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/18—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using pumps directly, i.e. without interposition of accumulators or reservoirs with control of pump output delivery, e.g. by distributor valves
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/14—Fluid pressure control
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/065—Smoothing ratio shift by controlling rate of change of fluid pressure using fluid control means
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/08—Timing control
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0209—Control by fluid pressure characterised by fluid valves having control pistons, e.g. spools
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0221—Valves for clutch control systems; Details thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Structure Of Transmissions (AREA)
  • Control Of Transmission Device (AREA)

Abstract

1,208,193. Variable-ratio gears. ZAHNRADFABRIK FRIEDRICHSHAFEN A.G. 28 Nov., 1968 [1 Dec., 1967; 22 Dec., 1967], No. 56479/68. Heading F2D. A clutch or brake of a planetary gear is engaged hydraulically, the rate of engagement being controlled by a valve 110 selectively connecting a supply passage 215 and a vent chamber 115 to a passage 126 leading to a clutch or brake chamber K. The left-hand end of the valve is connected to the clutch passage 126 by a throttle 126a and the right-hand end is loaded by spring 122 which is loaded in turn by clutch pressure acting through a throttle 125a on the right-hand side of a piston 124 and opposed by engine torque or engine or vehicle speed responsive pressure supplied through a passage 222 to the left-hand side of the piston 124. The supply pressure 215 can be constant or dependent on engine loading. The arrangement gives rapid light engagement of the clutch or brake followed by controlled increase to full application. A one-way valve 127a permits rapid disengagement. In a modification (Fig. 7) for controlling two brakes B1F, B1 which are to be applied sequentially, the valve spool 151 has lands controlling connection from a brake passage 166 to a supply passage 214 and to a vent chamber 155, and also controlling connection of a brake line 177 to a supply line 216, the valve being biased to the right by brake pressure 166 supplied through a throttle 166a and being biased to the left by a spring 162 loaded by brake pressure 166 supplied through a throttle 165a and opposed by torque or speed responsive pressure 222. The arrangement is such that after initial application of both brakes the valve is shifted rightwardly to cut off the supply to brake B1 and throttle the supply to brake B1F. When the pressure supplied to the brake B1F has risen sufficiently the piston 161 and valve 151 are shifted leftwardly to open brake B1 to supply 216 to complete application of this brake.
GB56479/68A 1967-12-01 1968-11-28 Hydraulic control device for building up variable pressure in clutches or brakes acting as shift elements in a gearbox adapted to be shifted under load Expired GB1208193A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1650928A DE1650928C3 (en) 1967-12-01 1967-12-01 Hydraulic device for variable pressure build-up in a clutch or brake, which acts as a shifting element, of a transmission that can be shifted under load
DEZ0013232 1967-12-22

Publications (1)

Publication Number Publication Date
GB1208193A true GB1208193A (en) 1970-10-07

Family

ID=42563116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56479/68A Expired GB1208193A (en) 1967-12-01 1968-11-28 Hydraulic control device for building up variable pressure in clutches or brakes acting as shift elements in a gearbox adapted to be shifted under load

Country Status (1)

Country Link
GB (1) GB1208193A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467331A1 (en) * 1979-10-15 1981-04-17 Nissan Motor DEVICE FOR REDUCING THE SHOCK OF CHANGING SPEED FOR A HYDRAULIC CONTROL SYSTEM OF AN AUTOMATIC TRANSMISSION
EP0029290A2 (en) * 1979-11-16 1981-05-27 General Motors Corporation Transmission controls
US4444297A (en) * 1980-11-27 1984-04-24 Automotive Products Limited Control system for a fluid pressure engaged clutch
US4487304A (en) * 1981-06-25 1984-12-11 Automotive Products Plc Control system for a fluid pressure engaged clutch

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2467331A1 (en) * 1979-10-15 1981-04-17 Nissan Motor DEVICE FOR REDUCING THE SHOCK OF CHANGING SPEED FOR A HYDRAULIC CONTROL SYSTEM OF AN AUTOMATIC TRANSMISSION
US4445401A (en) * 1979-10-15 1984-05-01 Wataru Ishimaru Gear shift shock reducing apparatus for hydraulic control system of automatic transmission
EP0029290A2 (en) * 1979-11-16 1981-05-27 General Motors Corporation Transmission controls
EP0029290A3 (en) * 1979-11-16 1982-04-21 General Motors Corporation Transmission controls
US4444297A (en) * 1980-11-27 1984-04-24 Automotive Products Limited Control system for a fluid pressure engaged clutch
US4487304A (en) * 1981-06-25 1984-12-11 Automotive Products Plc Control system for a fluid pressure engaged clutch

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years