Title:
自動変速機の変速制御装置
Document Type and Number:
Japanese Patent JP3965386
Kind Code:
B2
Abstract:
In a case of an electric failure caused to a traveling vehicle and when any of forward gears is held at a step S5, a comparison is made between: 1) a supposedly-engaged friction element of friction elements which is supposed to be engaged at the any of the forward gears and 2) an actually-engaged friction element of the friction elements which is sensed to be actually engaged, the sensing being based on a switch signal from a first hydraulic pressure switch 11, a second hydraulic pressure switch 12, a third hydraulic pressure switch 13, a fourth hydraulic pressure switch 14 and a fifth hydraulic pressure switch 15. When the supposedly-engaged friction element is not in accordance with the actually-engaged friction element, an electric system is determined to be in failure. In the case of the electric failure, a routine moves to a step S6 and subsequent steps for sticking the gear of an automatic transmission to a given gear. As described above, a shift control system of the automatic transmission is thus provided that can eliminate a sleeping failure thereby securely preventing an interlock and that can secure a high shift controllability which is not, in a period of shift, restricted in terms of hydraulic pressure control range of each of the friction elements.
Inventors:
Inunoda Yukinori
Application Number:
JP2003532879A
Publication Date:
August 29, 2007
Filing Date:
September 27, 2002
Export Citation:
Assignee:
JATCO Co., Ltd.
International Classes:
F16H61/12; F16H61/68; F16H61/684; F16H3/66; F16H59/68; F16H59/70; F16H61/02; F16H61/686; F16H63/12
Domestic Patent References:
| JP4194449A | ||||
| JP64035155A | ||||
| JP8258644A | ||||
| JP8159269A | ||||
| JP1172044A | ||||
| JP2001208190A | ||||
| JP2000065203A | ||||
| JP2000240776A |
Attorney, Agent or Firm:
Masamichi Ayata
Satoru Asakura
Satoru Asakura