GB877343A - Automatic stepless variable speed hydraulic drive - Google Patents

Automatic stepless variable speed hydraulic drive

Info

Publication number
GB877343A
GB877343A GB333458A GB333458A GB877343A GB 877343 A GB877343 A GB 877343A GB 333458 A GB333458 A GB 333458A GB 333458 A GB333458 A GB 333458A GB 877343 A GB877343 A GB 877343A
Authority
GB
United Kingdom
Prior art keywords
servomotor
piston
engine
pump
forces
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
GB333458A
Inventor
Kurt Hans
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.)
INST FORDERTECHNIK DES MINISTE
Original Assignee
INST FORDERTECHNIK DES MINISTE
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 INST FORDERTECHNIK DES MINISTE filed Critical INST FORDERTECHNIK DES MINISTE
Priority to GB333458A priority Critical patent/GB877343A/en
Publication of GB877343A publication Critical patent/GB877343A/en
Expired 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
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/47—Automatic regulation in accordance with output requirements for achieving a target output speed
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

877,343. Hydraulic transmission systems. INSTITUT FUR FORDERTECHNIK DES MINISTERIUMS FUR SCHWERMESCHINENBAU. Jan. 31, 1958, No. 3334/58. Class 69 (2). The infinitely variable transmission ratio of an hydraulic transmission system 2, 3 is controlled by a piston 12 acted on by differential forces depending on the speed of the prime mover 1 and the resistance to motion. For starting, a lever 11 is set to position 11a (forward) or to 11b (for reverse drive). Acceleration of engine 1 then causes a governor 14 driven thereby to force piston 12 to the right whereon an engine driven pump 4 supplies liquid via lines 24, 25 and the piston valves 12, 10, to a servomotor 8 which shifts to the right or left to " start " engine driven pump 2 in the correct sense. Servomotor 8 is prevented from moving further by springs 9. The pump 2 and motor 3 are connected in a closed circuit so that back pressure in accordance with the resistance to motion encountered by the motor 3 builds up in one of lines 26, 27, and hence the pressure in one of lines 28, 29 forces pistons 13, 12 back to the position shown, so that servomotor 8 is held in its new position. If excessive resistance is encountered, the high pressure in line 28 or 29 forces piston 12 to the left, when the cylinder of servomotor 8 is exhausted and servomotor 8 returns to its initial central position. If extra speed is required, further acceleration of engine 1 forces piston 12 further to the right and more liquid is admitted to servomotor 8, forcing it further to the right, so that the eccentricity of pump 2 is further increased. In a modification, governor 14 is replaced by a piston supplied with pressure liquid by a pump driven by engine 1.
GB333458A 1958-01-31 1958-01-31 Automatic stepless variable speed hydraulic drive Expired GB877343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB333458A GB877343A (en) 1958-01-31 1958-01-31 Automatic stepless variable speed hydraulic drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB333458A GB877343A (en) 1958-01-31 1958-01-31 Automatic stepless variable speed hydraulic drive

Publications (1)

Publication Number Publication Date
GB877343A true GB877343A (en) 1961-09-13

Family

ID=9756350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB333458A Expired GB877343A (en) 1958-01-31 1958-01-31 Automatic stepless variable speed hydraulic drive

Country Status (1)

Country Link
GB (1) GB877343A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339660A (en) * 1964-09-14 1967-09-05 Budzich Tadeusz Hydrostatic mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339660A (en) * 1964-09-14 1967-09-05 Budzich Tadeusz Hydrostatic mechanism

Similar Documents

Publication Publication Date Title
GB1168271A (en) Hydrostatic Transmission
GB1398206A (en) Starter-drives
GB1482947A (en) System for the combined control of an internal combustion engine and a hydrostatic transmission connected thereto
GB933642A (en) Improvements in control apparatus for power transmissions
GB1062631A (en) Improvements in or relating to composite hydromechanical constant-speed drives
GB1382764A (en) Fluid actuated vibration generators
GB1235097A (en) Improvements in power transmissions
GB1395937A (en) Steplessly variable hydrostatic transmission
GB990584A (en) Improvements in or relating to variable speed power transmission systems
GB1459533A (en) Pressurised fluid supply apparatus
GB1470430A (en) Hydraulic transmission
GB877343A (en) Automatic stepless variable speed hydraulic drive
GB1222515A (en) Improvements relating to hydraulically controlled rotary transmissions
GB980839A (en) Improved continuously variable change speed mechanism
GB1002289A (en) Transmission arrangement for tractors having hydraulically operated appliances
GB1474650A (en) Hydraulic control system
GB1374411A (en) Hydrostatic power unit
US3796052A (en) Hydraulic transmission system
GB1017571A (en) Hydraulic transmission mechanism
GB948779A (en) Vehicle hydraulic transmission mechanisms
GB1041872A (en) An improved control device for a hydrostatic gear
US3205653A (en) Power transmission system
GB1395901A (en) Hydraulic engine starting systems
GB693057A (en) Improvements in apparatus for driving and synchronising parallel-connected alternators
GB976980A (en) Improvements in power transmission systems