HYBRID VEHICLE - TOYOTA MOTOR CO LTD

Title:

HYBRID VEHICLE

Document Type and Number:

WIPO Patent Application WO/2013/080376

Kind Code:

A1

Abstract:

In a hybrid vehicle (10), a torque equal to the user-requested torque, determined in accordance with the accelerator operating amount (AP), is caused to act on a drive shaft (53) by controlling the torque generated by this engine and the output torque of a second generator/motor (MG2), while adjusting the output generated by this engine so that the efficiency of the engine (20) is optimum (in other words, while operating the engine (20) at the optimum engine operating point). Furthermore, the vehicle (10) charges the battery (63) by controlling the power generated by the first generator/motor (MG1), by altering the output of the engine in accordance with the residual amount (SOC) of the battery (63). In addition, the vehicle (10) controls the air/fuel ratio of the engine to a rich air/fuel ratio if a prescribed condition is not satisfied, and controls the air/fuel ratio of the engine to the theoretical air/fuel ratio if the prescribed condition is satisfied. If the engine air/fuel ratio is controlled to a rich air/fuel ratio, the vehicle (10) sets the upper limiting value of the output generated by the engine (20) (i.e. the upper limiting value of the engine output) to a small value compared with the case where the air/fuel ratio of the engine is controlled to the theoretical air/fuel ratio.

Inventors:

ANDO DAIGO (JP)

Application Number:

PCT/JP2011/077947

Publication Date:

June 06, 2013

Filing Date:

December 02, 2011

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
ANDO DAIGO (JP)

International Classes:

B60W10/06; B60K6/445; B60W10/08; B60W20/00

Foreign References:

JP2002195064A	2002-07-10
JP2008296619A	2008-12-11
JPH09308012A	1997-11-28
JP2009126450A	2009-06-11
US20100241297A1	2010-09-23
US6131680A	2000-10-17

Other References: