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Patent Searching and Data


Title:
ENGINE CONTROL DEVICE AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2012/001888
Kind Code:
A1
Abstract:
An engine 1 includes a variable valve mechanism 18 capable of switching a valve characteristic to a first valve characteristic according to which at least one of an operation of pre-opening an intake valve 14 during an exhaust stroke prior to a valve opening time in an intake stroke and an operation of re-opening an exhaust valve 15 during the intake stroke subsequently to the opening/closing thereof during the exhaust stroke is performed, and to a second valve characteristic according to which neither the pre-opening of the intake valve 14 nor the re-opening of the exhaust valve 15 is performed. In the engine 1, when the valve characteristic is the first valve characteristic, if the presence of a request for switching to the second valve characteristic resulting from an increase in engine load is detected, a pressure reducing operation for reducing the pressure in an exhaust passage 40 of the engine 1 is performed (e.g., a regulate valve 68 is opened). This allows, when the valve characteristic is switched from the first valve characteristic to the second valve characteristic as a result of an increase in engine load, the amount of fresh air charged into a cylinder 2 to be increased at the earliest possible time.

Inventors:
MARUYAMA, Keiji (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
YAMAGUCHI, Takayuki (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
TAKAKI, Kentaro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
MATSUO, Yuji (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
KOJIMA, Toshiyuki (13-15, Nakacho 2-chome Meguro-k, Tokyo 65, 15300, JP)
JINNO, Hiroyuki (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
Application Number:
JP2011/003296
Publication Date:
January 05, 2012
Filing Date:
June 10, 2011
Export Citation:
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Assignee:
MAZDA MOTOR CORPORATION (3-1 Shinchi, Fuchu-cho Aki-gu, Hiroshima 70, 73086, JP)
MARUYAMA, Keiji (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
YAMAGUCHI, Takayuki (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
TAKAKI, Kentaro (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
MATSUO, Yuji (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
KOJIMA, Toshiyuki (13-15, Nakacho 2-chome Meguro-k, Tokyo 65, 15300, JP)
JINNO, Hiroyuki (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 73086, JP)
International Classes:
F02D23/00; F02B37/00; F02B37/013; F02B37/12; F02B37/18; F02D13/02; F02D23/02; F02D43/00
Foreign References:
JP2000186517A2000-07-04
JP2004176568A2004-06-24
JP2009191737A2009-08-27
JPH03117611A1991-05-20
JP2009103084A2009-05-14
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (Osaka Nakanoshima Building 2nd Floor, 2-2 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 53000, JP)
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Claims: