FR2236680A1 - Vehicle hydrostatic transmission control - uses preset pressure relief valves to avoid excessive braking effect at wheels - Google Patents

Vehicle hydrostatic transmission control - uses preset pressure relief valves to avoid excessive braking effect at wheels

Info

Publication number
FR2236680A1
FR2236680A1 FR7423993A FR7423993A FR2236680A1 FR 2236680 A1 FR2236680 A1 FR 2236680A1 FR 7423993 A FR7423993 A FR 7423993A FR 7423993 A FR7423993 A FR 7423993A FR 2236680 A1 FR2236680 A1 FR 2236680A1
Authority
FR
France
Prior art keywords
wheels
transmission control
pressure relief
preset pressure
braking effect
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
FR7423993A
Other languages
French (fr)
Other versions
FR2236680B1 (en
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of FR2236680A1 publication Critical patent/FR2236680A1/en
Application granted granted Critical
Publication of FR2236680B1 publication Critical patent/FR2236680B1/fr
Granted legal-status Critical Current

Links

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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4157—Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
    • 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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements

Abstract

If the engine power of a vehicle which is driven by one or more hydraulic converters or transmissions is cut by the normal removal of the foot from the accelerator pedal, the braking force which is caused by the action of the converter wheels is so large that it can endanger the stability of the vehicle. This condition is avoided by arranging pre-set pressure control valves between the high and low pressure fluid feed and return lines to and from the converter. In the event of an emergency the full effect of the converter braking force is available to the road wheels.
FR7423993A 1973-07-10 1974-07-10 Vehicle hydrostatic transmission control - uses preset pressure relief valves to avoid excessive braking effect at wheels Granted FR2236680A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732335247 DE2335247A1 (en) 1973-07-10 1973-07-10 CONTROL DEVICE FOR A HYDROSTATIC MOTOR VEHICLE TRANSMISSION

Publications (2)

Publication Number Publication Date
FR2236680A1 true FR2236680A1 (en) 1975-02-07
FR2236680B1 FR2236680B1 (en) 1977-10-07

Family

ID=5886567

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7423993A Granted FR2236680A1 (en) 1973-07-10 1974-07-10 Vehicle hydrostatic transmission control - uses preset pressure relief valves to avoid excessive braking effect at wheels

Country Status (2)

Country Link
DE (1) DE2335247A1 (en)
FR (1) FR2236680A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515582A1 (en) * 1981-11-03 1983-05-06 Linde Ag CONTROL ARRANGEMENT FOR A HYDRAULIC PREFERABLY TRANSMISSION THAT CAN BE CONTINUOUSLY ADJUSTED
EP0051600B1 (en) * 1980-05-07 1986-04-02 Caterpillar Tractor Co. Wheel slip control on differentially driven wheels
FR2578937A1 (en) * 1985-03-13 1986-09-19 Man Nutzfahrzeuge Gmbh HYDROSTATIC TRANSMISSION COMPRISING TWO HYDROSTATIC MACHINES ENSURING THE FUNCTION OF A WHEEL BRAKE OF A VEHICLE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS609092Y2 (en) * 1978-11-28 1985-04-01 株式会社小松製作所 Inching brake control circuit for hydraulically driven vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051600B1 (en) * 1980-05-07 1986-04-02 Caterpillar Tractor Co. Wheel slip control on differentially driven wheels
FR2515582A1 (en) * 1981-11-03 1983-05-06 Linde Ag CONTROL ARRANGEMENT FOR A HYDRAULIC PREFERABLY TRANSMISSION THAT CAN BE CONTINUOUSLY ADJUSTED
FR2578937A1 (en) * 1985-03-13 1986-09-19 Man Nutzfahrzeuge Gmbh HYDROSTATIC TRANSMISSION COMPRISING TWO HYDROSTATIC MACHINES ENSURING THE FUNCTION OF A WHEEL BRAKE OF A VEHICLE

Also Published As

Publication number Publication date
FR2236680B1 (en) 1977-10-07
DE2335247A1 (en) 1975-01-30

Similar Documents

Publication Publication Date Title
JPS6435169A (en) Hydraulic control device for vehicle continuously variable transmission
SE7710822L (en) DEVICE FOR HYDRAULIC BRAKE SYSTEMS WITH SLIP-INHIBITING CONTROL DEVICE
ES250359U (en) Hydraulic brake booster
JPS5718851A (en) Hydraulic controller in automatic speed change gear for vehicle
ES429520A1 (en) Hydraulic summating system
FR2236680A1 (en) Vehicle hydrostatic transmission control - uses preset pressure relief valves to avoid excessive braking effect at wheels
SE7906490L (en) MOTOR VEHICLE BRAKE UNIT
FR2421772A1 (en) MODULATION VALVE FOR ANTI-SPIN BRAKE SYSTEM
GB1085153A (en) Power assisted braking system
FR2231537A1 (en) Hydrostatic tractor vehicle transmission - with torque limiter to protect transmission from excessive power take-off point torque
FR2273985A1 (en) Hydrostatic transmission with automatic pressure control - has safety interlock to provide gradual pressure drop when accelerator released
ES8406685A1 (en) Pilot-controlled valve for braking or speed limitation in a hydraulic circuit
JPH0265757U (en)
JPS56164229A (en) Hydraulic clutch device in running transmission device for vehicle
JPS56134663A (en) Hydraulic device for turning hydraulic crane or the like
GB1448523A (en) Slide valve for an hydraulic system in a motor vehicle
SE8802009L (en) DEVICE FOR STORAGE OF HYDRAULIC EXTRA ENERGY
JPS5431130A (en) Static hydraulic power transmitting system for use in hydraulically driven vehicle or the like
ES8202410A1 (en) Group of inertial accumulation of variable energy (Machine-translation by Google Translate, not legally binding)
SU1491754A1 (en) Intensified hydraulic wheeled vehicle brake drive
GB1468348A (en) Power plants with torque converters
JPS5682648A (en) Auxiliary braking device for industrial vehicle
FR2257452A2 (en) Hydraulic vehicle transmission and brake system - has fluid distributor and valves controlling flow to reservoir
SU935351A1 (en) Traction and hauling vehicle
GB960124A (en) Improvements in or relating to transmission or drives for motor vehicles

Legal Events

Date Code Title Description
ST Notification of lapse