ENGINE - TOYOTA MOTOR CO LTD

Title:

ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/063313

Kind Code:

A1

Abstract:

Provided is an engine equipped with a supercharger (exhaust turbocharger) which is rotationally driven by means of exhaust gas and for which the expansion ratio can be set greater than the compression ratio. The engine also is equipped with: an operating state determination means that determines the operating state of the engine; multiple exhaust valves provided with respect to one air cylinder; a variable exhaust valve timing mechanism capable of changing the valve-open period for a least one of the aforementioned multiple exhaust valves; and a control unit which, when it is determined by the aforementioned operating state determination means that the engine is operating with a light load acceleration is occurring, issues a command to the aforementioned variable exhaust valve timing mechanism so as to make the valve-open period for the aforementioned one exhaust valve occur at a more advanced angle than the valve-open period for the other exhaust valves, thus maintaining the supercharging response and the expansion ratio.

Inventors:

KAMIYAMA EIICHI (JP)

Application Number:

PCT/JP2010/069859

Publication Date:

May 18, 2012

Filing Date:

November 08, 2010

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
KAMIYAMA EIICHI (JP)

International Classes:

F02D13/02; F02B37/00; F02D15/04; F02D23/00

Foreign References:

JP2004183510A	2004-07-02
JP2009074366A	2009-04-09
JP2009057958A	2009-03-19
JPH0331534A	1991-02-12
JP2009115035A	2009-05-28
JP2008128227A	2008-06-05
JP2009162113A	2009-07-23
JP2004183510A	2004-07-02

Other References: