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Title:
CAM FOR LIFTING/LOWERING EXHAUST VALVE, 4-CYCLE ENGINE EQUIPPED WITH SUPERCHARGER, AND METHOD FOR CONTROLLING VALVE TIMING
Document Type and Number:
WIPO Patent Application WO/2010/116546
Kind Code:
A1
Abstract:
Provided is a cam for lifting/lowering an exhaust valve wherein exhaust gas can be recirculated as much as possible to one cylinder from another cylinder while contact of a piston with the exhaust valve is avoided without relying upon electronic control.  A cam for lifting/lowering an exhaust valve of one cylinder is provided with an exhaust main lift portion for discharging exhaust gas from a cylinder, and a recirculation lift portion that is formed on the downside of the direction in which an exhaust valve press cam rotates in order to increase the recirculation amount of exhaust gas flowing into the exhaust port of one cylinder from another cylinder, and that delays the close timing of valve lift or maintains a high lift, wherein the exhaust main lift portion and recirculation lift portion are formed to rise from a base circle (R) in order to increase overlap with another cylinder while avoiding the contact of the exhaust valve with the piston.

Inventors:
KANEKO, Takashi (C/O General Machinery & Special Vehicle Headquarters, MITSUBISHI HEAVY INDUSTRIES LTD. ,3000, Tana, Sagamihara-sh, Kanagawa 93, 〒2291193, JP)
金子高 (〒93 神奈川県相模原市田名3000番地三菱重工業株式会社汎用機・特車事業本部内 Kanagawa, 〒2291193, JP)
Application Number:
JP2009/064397
Publication Date:
October 14, 2010
Filing Date:
August 17, 2009
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (16-5, Konan 2-chome Minato-ku Tokyo, 15, 〒1088215, JP)
三菱重工業株式会社 (〒15 東京都港区港南二丁目16番5号 Tokyo, 〒1088215, JP)
KANEKO, Takashi (C/O General Machinery & Special Vehicle Headquarters, MITSUBISHI HEAVY INDUSTRIES LTD. ,3000, Tana, Sagamihara-sh, Kanagawa 93, 〒2291193, JP)
International Classes:
F02M25/07; F01L1/08; F01L13/00; F02D13/02; F02D17/02; F02D21/08
Foreign References:
JP2005291210A2005-10-20
JP2003184588A2003-07-03
JP2001065320A2001-03-13
JP2007263050A2007-10-11
JP3940799B22007-07-04
JPS58110809A1983-07-01
Other References:
See also references of EP 2418372A4
"Engine Data Book (Engines manufactured during 1994 toward 1995 in Japan)", 15 August 1995, ISHIKAWA TEIJI OF SANKAIDOU, INC.
NAGAO FUJIO: "Lectures on Internal Combustion Engine", vol. I, 20 March 1960, YOKENDOU INC.
Attorney, Agent or Firm:
TAKAHASHI, MATSUMOTO & PARTNERS INTELLECTUAL PROPERTY CORP. (Room 1003, Ambassador Roppongi Buildings 16-13, Roppongi 3-chome, Minato-k, Tokyo 32, 〒1060032, JP)
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