Title:
ENGINE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3807174
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To generate large gas flow in a cylinder in a low load/low speed rotation area and to secure accuracy in air-fuel ratio controlling.
SOLUTION: In an engine having two intake ports at each cylinder, an intake air amount is controlled by controlling opening/closing timings of intake valves arranged on the respective intake ports. In such an engine, the two intake valves are both actuated for controlling the intake air amount in a high load/ high speed rotation area, while only one of the intake valves is actuated in a low load/low speed rotation area, for generating large flow of gas in the cylinder (S3). A fuel correction amount in a transient time based on the fuel amount adhered to a wall surface is changed over correspondingly to port flow velocity differentiated between actuation of both the intake valves and actuation of only one intake valve (S4, S5).
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Inventors:
Katsuhiro Arai
Hatsoo Nagaishi
Hatsoo Nagaishi
Application Number:
JP34613599A
Publication Date:
August 09, 2006
Filing Date:
December 06, 1999
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02B23/08; F02D41/04; F01L9/20; F02B31/08; F02D13/02; F02D41/00; F02D43/00; F02M69/00; (IPC1-7): F02D41/04; F02B23/08; F02D13/02; F02D43/00; F02M69/00
Domestic Patent References:
| JP3115741A | ||||
| JP11223137A |
Attorney, Agent or Firm:
Tomijio Sasashima