Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
DEVICE AND METHOD FOR DETERMINING FAILURE OF STEPLESS TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2009/017216
Kind Code:
A1
Abstract:
An ECU performs a program including a step (S106) of determining that a shift solenoid is abnormal if a target transmission ratio is within a predetermined range (YES in S100), an upshift is determined (YES in S102), and the shift solenoid is in an abnormal condition (YES in S104); a step (S108) of determining that the shift solenoid is normal if the shift solenoid is not in an abnormal condition (NO in S104); a step (S114) of determining that a belt pressing solenoid is abnormal if the target transmission ratio is substantially equal to a transmission ratio (γmin) on the side where the speed is increased to a maximum level (YES in S110) and the target transmission ratio and an actual transmission ratio is substantially not equal to each other (No in S112); and a step (S116) of determining that the belt pressing solenoid is normal if the target transmission ratio and the actual transmission ratio are substantially equal to each other (YES in S112).

Inventors:
TANAKA, Naoto (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
田中直人 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 4718571, JP)
TOYODA, Shinya (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
豊田晋哉 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 4718571, JP)
INOUE, Naoya (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
井上直也 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 4718571, JP)
Application Number:
JP2008/063829
Publication Date:
February 05, 2009
Filing Date:
July 25, 2008
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 4718571, JP)
トヨタ自動車株式会社 (〒71 愛知県豊田市トヨタ町1番地 Aichi, 4718571, JP)
TANAKA, Naoto (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
田中直人 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 4718571, JP)
TOYODA, Shinya (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
豊田晋哉 (〒71 愛知県豊田市トヨタ町1番地 トヨタ自動車株式会社内 Aichi, 4718571, JP)
INOUE, Naoya (1 Toyota-cho, Toyota-sh, Aichi 71, 4718571, JP)
International Classes:
F16H61/12; F16H61/66; F16H61/662; F16H59/70
Foreign References:
JP2004263714A2004-09-24
JP2006342837A2006-12-21
JPH08127261A1996-05-21
JPH09329228A1997-12-22
JPH08238951A1996-09-17
JPH08326855A1996-12-10
Other References:
See also references of EP 2175173A4
Attorney, Agent or Firm:
FUKAMI, Hisao et al. (Fukami Patent Office, Nakanoshima Central Tower 22nd Floor,2-7, Nakanoshima 2-chome,Kita-ku, Osaka-sh, Osaka 05, 5300005, JP)
Download PDF: