ELECTRIC POWERTRAIN SYSTEM

WIPO Patent Application WO/2014/024635

A1

In order to provide an electric powertrain system having a plurality of heat generation sources and a plurality of heat transfer pathways, which diagnoses the abnormality of the heat transfer pathways and the joints in the powertrain system, the electric powertrain system, which is a drive system for an electric vehicle wherein a plurality of components having heat generation sources such as a motor (1200) and an inverter (1100) are integrally structured with an interface therebetween, includes a plurality of temperature sensors (1400) and a diagnosis control unit (1310) provided with a heat transfer model (1312) for the electric powertrain that is simulated on the basis of the temperature of the temperature sensors. The diagnosis control unit estimates the temperature of the plurality of components using the heat transfer model and determines the presence or absence of the abnormality in heat transfer in a plurality of operation diagnosis modes. The electric powertrain is provided with an output device (100) which outputs the determination results from the diagnosis control unit.

OKADA TAKASHI (JP)
MIYAZAKI HIDEKI (JP)
OYAMA KAZUTO (JP)
HOSHINO KATSUHIRO (JP)

PCT/JP2013/069087

February 13, 2014

July 12, 2013

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

H02P27/06; B60K6/48; B60K6/54; B60L3/00; B60W10/08; B60W20/00

JPH0654572A	1994-02-25
JP2010074988A	2010-04-02
JP2005269832A	2005-09-29
JP2009225541A	2009-10-01
JP2011216718A	2011-10-27
JP2008005615A	2008-01-10
JP2007112188A	2007-05-10
JP2011097812A	2011-05-12

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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