ENGINE - YAMAHA MOTOR CO LTD

Title:

ENGINE

Document Type and Number:

WIPO Patent Application WO/2007/029632

Kind Code:

A1

Abstract:

An engine having a first catalyst (5) placed in a first exhaust path (3a), a second catalyst (6) placed in a second exhaust path (3b) so as to be located on the upstream side of the first catalyst (5), a variable valve train mechanism (11) constructed so that it can vary the amount of lift of first and second exhaust valves (8, 9) from substantially zero to the maximum level, and a lift amount control section for causing the variable valve train mechanism (11) to control the amount of lift of the first and second exhaust valves (8, 9) so that, at least when the engine is started, the amount of exhaust gas passing the second exhaust path (3b) is greater than that passing the first exhaust path (3a).

Inventors:

NOWATARI NOBORU (JP)
FUJITA HIDEO (JP)

Application Number:

PCT/JP2006/317428

Publication Date:

March 15, 2007

Filing Date:

September 04, 2006

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)
NOWATARI NOBORU (JP)
FUJITA HIDEO (JP)

International Classes:

F02D13/02; F01L1/18; F01L1/26; F01L13/00

Domestic Patent References:

WO2003098012A1

2003-11-27

Foreign References:

JPH07166849A	1995-06-27
JPH0333410A	1991-02-13
JPH07158426A	1995-06-20
JP2005098279A	2005-04-14
JP2005264787A	2005-09-29
JPS6449638U	1989-03-28
JPH02259205A	1990-10-22

Other References: