THROTTLE VALVE ABNORMALITY DETERMINATION DEVICE

WIPO Patent Application WO/2017/138602

A1

This throttle valve abnormality determination device is provided with: a first temperature acquisition unit configured so as to acquire a first temperature, i.e. a temperature in a passage through which intake air flows; a second temperature acquisition unit configured so as to acquire a second temperature, i.e. a temperature in the passage; an air amount acquisition unit configured so as to acquire the intake air amount, i.e. the mass flow rate of the intake air; and a permissibility determination unit configured so as to determine whether to allow or prohibit a throttle valve sticking determination on the basis of the first temperature, the second temperature, and the intake air amount. The permissibility determination unit is configured so as to: prohibit the sticking determination if the first temperature is equal to or lower than a freezing temperature, at which freezing of the throttle valve is likely, when an engine is started; and allow the sticking determination after the sticking determination has been prohibited, when the second temperature is equal to or greater than a thawing temperature, at which a frozen portion of the throttle valve thaws, and an integrated value of a heat quantity converted value based on the second temperature and the intake air amount exceeds a threshold value.

KANETA MOTOYOSHI (JP)

PCT/JP2017/004711

August 17, 2017

February 09, 2017

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HINO MOTORS LTD (JP)

F02D11/10; F02B29/04; F02D9/02; F02D45/00

WO2008004421A1

2008-01-10

JP2001295670A	2001-10-26
JP2006249952A	2006-09-21
JP2015178812A	2015-10-08
JPH0617718A	1994-01-25
JP2003129869A	2003-05-08
JP2009156228A	2009-07-16
JP2001227362A	2001-08-24

See also references of EP 3415742A4

ONDA, Makoto et al. (JP)

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