JPS5586926A - Protective device for hydraulic system - Google Patents

Protective device for hydraulic system

Info

Publication number
JPS5586926A
JPS5586926A JP15640478A JP15640478A JPS5586926A JP S5586926 A JPS5586926 A JP S5586926A JP 15640478 A JP15640478 A JP 15640478A JP 15640478 A JP15640478 A JP 15640478A JP S5586926 A JPS5586926 A JP S5586926A
Authority
JP
Japan
Prior art keywords
pressure
hydraulic
comparators
converters
prevented
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
JP15640478A
Other languages
Japanese (ja)
Inventor
Masatoshi Terasaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15640478A priority Critical patent/JPS5586926A/en
Publication of JPS5586926A publication Critical patent/JPS5586926A/en
Pending legal-status Critical Current

Links

Landscapes

  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

PURPOSE: To prevent a released hydraulic clutch from wrongly operating and raise the reliability, by providing pressure detectors in hydraulic circuits for a plurality of hydraulic clutches and connecting the pressure detectors and both the solenoids of a four-way solenoid valve to a protection circuit.
CONSTITUTION: Pressure values detected by pressure detectors 10, 11 in a hydraulic system are applied to comparators 15a, 15b through A-D converters 13a, 13b of a protection circuit 12. When a solenoid 2a is energized and another solenoid 2b is deenergized and pressure values P01, P02 are set for hydraulic clutches 3, 4 by a set pressure changer 14, the set values are applied to the comparators 15a, 15b and compared with the outputs of A-D converters 13a, 13b. Outputs corresponding to the differences between the compared quantities are applied to a signal generator 16 so that the operating oil pressure of the hydraulic clutch 3 is prevented from falling below the set value P01 and the pressure of a pipe 8 for the hydraulic clutch 4 is prevented from exceeding the set value P02.
COPYRIGHT: (C)1980,JPO&Japio
JP15640478A 1978-12-20 1978-12-20 Protective device for hydraulic system Pending JPS5586926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15640478A JPS5586926A (en) 1978-12-20 1978-12-20 Protective device for hydraulic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15640478A JPS5586926A (en) 1978-12-20 1978-12-20 Protective device for hydraulic system

Publications (1)

Publication Number Publication Date
JPS5586926A true JPS5586926A (en) 1980-07-01

Family

ID=15626993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15640478A Pending JPS5586926A (en) 1978-12-20 1978-12-20 Protective device for hydraulic system

Country Status (1)

Country Link
JP (1) JPS5586926A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61197825A (en) * 1985-02-26 1986-09-02 Hino Motors Ltd Hydraulic clutch
JP2008138887A (en) * 1997-07-14 2008-06-19 Luk Getriebe Syst Gmbh Control device for transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61197825A (en) * 1985-02-26 1986-09-02 Hino Motors Ltd Hydraulic clutch
JP2008138887A (en) * 1997-07-14 2008-06-19 Luk Getriebe Syst Gmbh Control device for transmission device

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