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JPS6435172A - Hydraulic control means for automatic transmission - Google Patents

Hydraulic control means for automatic transmission

Info

Publication number
JPS6435172A
JPS6435172A JP19139287A JP19139287A JPS6435172A JP S6435172 A JPS6435172 A JP S6435172A JP 19139287 A JP19139287 A JP 19139287A JP 19139287 A JP19139287 A JP 19139287A JP S6435172 A JPS6435172 A JP S6435172A
Authority
JP
Japan
Prior art keywords
range
gear shift
hydraulic pressure
frictionally engaging
condition
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
JP19139287A
Other languages
Japanese (ja)
Inventor
Takuji Fujiwara
Akio Matsumoto
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.)
Mazda Motor Corp
Original Assignee
Mazda Motor Corp
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 Mazda Motor Corp filed Critical Mazda Motor Corp
Priority to JP19139287A priority Critical patent/JPS6435172A/en
Publication of JPS6435172A publication Critical patent/JPS6435172A/en
Pending legal-status Critical Current

Links

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  • Control Of Transmission Device (AREA)

Abstract

PURPOSE:To restrain shocks upon gear shift by detecting the condition of engagement of a frictionally engaging element in accordance with the rotational speed of a turbine in a torque converter after the gear shift range is changed over into a travel range from a no travel range so as to regulate the hydraulic pressure. CONSTITUTION:A range change-over means changes over the gear shift range of an automatic transmission into a travel range from a no travel range, and when this condition is detected by the range change-over means, a hydraulic control means feeds hydraulic pressure to frictionally engaging elements such as a clutch, a brake and the like, so that they are gradually shifted into their engagement conditions. In this phase, since the automobile is in a stop condition, the rotational speed of a turbine in a torque converter is lowered, and it comes to zero when the frictionally engaging elements fall in the engagement condition. Accordingly, the hydraulic control means sustains a relatively low hydraulic pressure until the turbine rotational speed detected by a detecting means comes to zero, and when it comes to zero, it is judged that the frictionally engaging element are engaged, and the hydraulic pressure is increased. Thus, it is possible to effectively prevent occurrence of shocks upon gear shift.
JP19139287A 1987-07-30 1987-07-30 Hydraulic control means for automatic transmission Pending JPS6435172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19139287A JPS6435172A (en) 1987-07-30 1987-07-30 Hydraulic control means for automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19139287A JPS6435172A (en) 1987-07-30 1987-07-30 Hydraulic control means for automatic transmission

Publications (1)

Publication Number Publication Date
JPS6435172A true JPS6435172A (en) 1989-02-06

Family

ID=16273839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19139287A Pending JPS6435172A (en) 1987-07-30 1987-07-30 Hydraulic control means for automatic transmission

Country Status (1)

Country Link
JP (1) JPS6435172A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04210155A (en) * 1990-01-11 1992-07-31 General Motors Corp <Gm> How to control changes in a vehicle's automatic transmission
JP2002295657A (en) * 2001-03-29 2002-10-09 Aisin Aw Co Ltd Parking managing device for vehicle
US6971971B2 (en) * 2002-11-01 2005-12-06 Spicer Off-Highway Belgium N.V. Method and system for an adaptation of an engagement of an automated clutch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185225A (en) * 1984-10-03 1986-04-30 Nissan Motor Co Ltd Start control device for automatic transmission loading car with creep prevention unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6185225A (en) * 1984-10-03 1986-04-30 Nissan Motor Co Ltd Start control device for automatic transmission loading car with creep prevention unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04210155A (en) * 1990-01-11 1992-07-31 General Motors Corp <Gm> How to control changes in a vehicle's automatic transmission
JP2002295657A (en) * 2001-03-29 2002-10-09 Aisin Aw Co Ltd Parking managing device for vehicle
US6971971B2 (en) * 2002-11-01 2005-12-06 Spicer Off-Highway Belgium N.V. Method and system for an adaptation of an engagement of an automated clutch

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