JPS6435155A - Safety device for transmission - Google Patents

Safety device for transmission

Info

Publication number
JPS6435155A
JPS6435155A JP19139987A JP19139987A JPS6435155A JP S6435155 A JPS6435155 A JP S6435155A JP 19139987 A JP19139987 A JP 19139987A JP 19139987 A JP19139987 A JP 19139987A JP S6435155 A JPS6435155 A JP S6435155A
Authority
JP
Japan
Prior art keywords
speed change
controller
transmission
main controller
switch
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.)
Pending
Application number
JP19139987A
Other languages
Japanese (ja)
Inventor
Yoshio Asayama
Makio Tsubota
Yasunori Okura
Takayuki Sato
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP19139987A priority Critical patent/JPS6435155A/en
Publication of JPS6435155A publication Critical patent/JPS6435155A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Transmission Device (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

PURPOSE:To prevent breakage of a transmission due to double engagement etc., of a clutch by furnishing a sub-controller in addition to a controller to perform speed change control, and by performing speed change control upon changing over when any abnormality in the controller is sensed. CONSTITUTION:Upon receiving a lever position signal from a shift lever 40, an automatic speed change main controller 30 gives speed change command signals a1-a6 to a transmission valve 20 via a selector circuit 80, to switch the gear position of transmission 10. A sub-controller 50 provided besides compares the speed change commands a1-a6 from the main controller 30 with pressures P1-P6 of pressure control valves of T/M valve 20, and in case they are not identical, it shall be sensed as abnormality of the main controller 30 with the selector circuit 80 switched followed by output of other speed change command signals b1-b6 in accordance with a shift lever position signal SH. It is also switchable with an emergency manual switch 70, which can be reset by a reset switch 71. Thus breakage of T/M due to double engagement etc., of clutch can be prevented.
JP19139987A 1987-07-30 1987-07-30 Safety device for transmission Pending JPS6435155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19139987A JPS6435155A (en) 1987-07-30 1987-07-30 Safety device for transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19139987A JPS6435155A (en) 1987-07-30 1987-07-30 Safety device for transmission

Publications (1)

Publication Number Publication Date
JPS6435155A true JPS6435155A (en) 1989-02-06

Family

ID=16273954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19139987A Pending JPS6435155A (en) 1987-07-30 1987-07-30 Safety device for transmission

Country Status (1)

Country Link
JP (1) JPS6435155A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003029700A1 (en) * 2001-09-28 2003-04-10 Jatco Ltd Shift control device for automatic transmission
JP2008138887A (en) * 1997-07-14 2008-06-19 Luk Getriebe Syst Gmbh Control device for transmission device
JP2008240863A (en) * 2007-03-27 2008-10-09 Suzuki Motor Corp Shift-by-wire type gear shift control device
JP2010112443A (en) * 2008-11-05 2010-05-20 Toyota Motor Corp Control device of vehicle
JP2010236669A (en) * 2009-03-31 2010-10-21 Aisin Aw Co Ltd Control device of automatic transmission

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008138887A (en) * 1997-07-14 2008-06-19 Luk Getriebe Syst Gmbh Control device for transmission device
WO2003029700A1 (en) * 2001-09-28 2003-04-10 Jatco Ltd Shift control device for automatic transmission
US6966862B2 (en) 2001-09-28 2005-11-22 Jatco Ltd Shift control system of automatic transmission
JP2008240863A (en) * 2007-03-27 2008-10-09 Suzuki Motor Corp Shift-by-wire type gear shift control device
JP2010112443A (en) * 2008-11-05 2010-05-20 Toyota Motor Corp Control device of vehicle
JP2010236669A (en) * 2009-03-31 2010-10-21 Aisin Aw Co Ltd Control device of automatic transmission

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