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FR2239418A1 - Agricultural machine hydraulic lift control - has threshold value stages controlling solenoid valves for movement in opposite directions - Google Patents

Agricultural machine hydraulic lift control - has threshold value stages controlling solenoid valves for movement in opposite directions

Info

Publication number
FR2239418A1
FR2239418A1 FR7344508A FR7344508A FR2239418A1 FR 2239418 A1 FR2239418 A1 FR 2239418A1 FR 7344508 A FR7344508 A FR 7344508A FR 7344508 A FR7344508 A FR 7344508A FR 2239418 A1 FR2239418 A1 FR 2239418A1
Authority
FR
France
Prior art keywords
threshold value
valve
hydraulic lift
movement
opposite directions
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
FR7344508A
Other languages
French (fr)
Other versions
FR2239418B3 (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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2239418A1 publication Critical patent/FR2239418A1/en
Application granted granted Critical
Publication of FR2239418B3 publication Critical patent/FR2239418B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D49/00—Tractors
    • B62D49/08—Tractors having means for preventing overturning or tipping
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • A01D41/14—Mowing tables
    • A01D41/145—Header lifting devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Harvester Elements (AREA)

Abstract

The system is particularly for use on agricultural machines such as tractors and combine harvesters, having one or more electrical desired-value emitters adjustable to give the desired position or degree of draught, and one or more electrical actual-value emitters on the machine itself. Two or more threshold value stages are provided, one operating above and the other below a set control discrepancy, and each controlling a solenoid valve. Each valve controls an opposite movement of the hydraulic lift, and a feedback is provided, so that after one valve has functioned a delay occurs before the other can do so. The terminal through which a control voltage is applied to one valve to cause it to function can be connected via an integrator unit with the input of the threshold value stage of the other valve.
FR7344508A 1973-08-01 1973-12-13 Agricultural machine hydraulic lift control - has threshold value stages controlling solenoid valves for movement in opposite directions Granted FR2239418A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732338892 DE2338892C2 (en) 1973-08-01 1973-08-01 Electric regulating and control device for hydraulic lifting devices

Publications (2)

Publication Number Publication Date
FR2239418A1 true FR2239418A1 (en) 1975-02-28
FR2239418B3 FR2239418B3 (en) 1976-10-15

Family

ID=5888532

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7344508A Granted FR2239418A1 (en) 1973-08-01 1973-12-13 Agricultural machine hydraulic lift control - has threshold value stages controlling solenoid valves for movement in opposite directions

Country Status (2)

Country Link
DE (1) DE2338892C2 (en)
FR (1) FR2239418A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555012A1 (en) * 1983-11-22 1985-05-24 Bosch Gmbh Robert Control for agricultural attachments for tractor
EP0299223A2 (en) * 1987-07-16 1989-01-18 Robert Bosch Gmbh Vehicle with dynamic stabilisation of its movements

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555012A1 (en) * 1983-11-22 1985-05-24 Bosch Gmbh Robert Control for agricultural attachments for tractor
EP0299223A2 (en) * 1987-07-16 1989-01-18 Robert Bosch Gmbh Vehicle with dynamic stabilisation of its movements
EP0299223A3 (en) * 1987-07-16 1989-03-15 Robert Bosch Gmbh Vehicle with dynamic stabilisation of its movements

Also Published As

Publication number Publication date
DE2338892A1 (en) 1975-04-17
DE2338892C2 (en) 1984-01-19
FR2239418B3 (en) 1976-10-15

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