Title:
INTAKE VALVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE AND INTAKE VALVE CONTROLLING METHOD
Document Type and Number:
Japanese Patent JP3536519
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce a loss of pump without accompanying any deterioration of combustion under an application of partial load in a 4-cycle gasoline engine.
SOLUTION: This device is provided with a variable driving valve mechanism in which an opening or closing time for an intake valve can be continuously controlled in variable mode. Under an application of a high load (a), the valve is opened before a top dead center of intake operation so as to produce a valve overlapped state and closed in a further delayed time from a bottom dead center of compression. As a load is decreased, an opening time is gradually delayed and in turn the closing time is made gradually fast. At the time of low load (b), the opening time is delayed to the top dead center and the closing time is near the bottom dead center. Since a pressure is gradually decreased at the initial time of intake stroke until residual gas is expanded to become approximately equal to a pressure in the intake tube, the pump loss is decreased. In addition, the closing time is made fast to cause combustion to be improved.
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Inventors:
Aoyama, Shunichi
Nakamura, Makoto
Takemura, Shinichi
Nakamura, Makoto
Takemura, Shinichi
Application Number:
JP7969396A
Publication Date:
June 14, 2004
Filing Date:
April 02, 1996
Export Citation:
Assignee:
NISSAN MOTOR CO LTD
International Classes:
F02B29/08; F02D13/02; F02D23/00; F02D41/04; F02D45/00; (IPC1-7): F02D13/02; F02B29/08; F02D41/04; F02D45/00
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