ABNORMALITY DETECTION DEVICE FOR AUTOMATIC TRANSMISSION

WIPO Patent Application WO/2017/142046

A1

An abnormality detection device for an automatic transmission according to the present invention comprises: an automatic transmission (5A) that is coupled to a vehicle drive source (1, 3) via a clutch (4a); a range detector (14) that detects the selection range of a selector lever (9) and outputs a detection signal; and a manual valve (90) that engages the clutch (4a) and sets the automatic transmission (5A) to a power transmission state when the selector lever (9) is in a travel range position, and disengages the clutch (4a) and sets the automatic transmission (5A) to a non-power-transmission state when the selector lever (9) is in a position other than a travel range position. The abnormality detection device for an automatic transmission comprises: an engagement control means (10B) that performs engagement control on the clutch (4a) towards the engagement direction from the disengaged state if a no-signal state in which no signal is output from the range detector (14) continues for at least a first prescribed period of time; an engagement identification means (10C) that identifies the engagement of the clutch (4a) during the engagement control; and an abnormality determination means (10D) that determines that there is a no-signal abnormality in which the range detector (14) does not output signals if the engagement of the clutch (4a) is identified.

MATSUI JUNKI (JP)
HAMANO MASAHIRO (JP)
AMANO NORIHIRA (JP)

PCT/JP2017/005785

August 24, 2017

February 16, 2017

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JATCO LTD (JP)
NISSAN MOTOR (JP)

F16H61/12; F16H59/04; F16H59/40; F16H61/02; F16H63/46

JP2004251327A	2004-09-09
JP2005344805A	2005-12-15
JPH07301313A	1995-11-14

KOBAYASHI, Hiromichi et al. (JP)

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