Title:
INTAKE AIR QUANTITY CONTROLLER OF ENGINE
Document Type and Number:
Japanese Patent JP3412644
Kind Code:
B2
Abstract:
PURPOSE: To rapidly vary an air-fuel ratio of an engine with high responsiveness without generating any large torque shock.
CONSTITUTION: A closing timing of an intake valve 15 is varied by a valve timing varying means 20. A target air-fuel ratio becomes larger than a theoretical air-fuel ratio in a low load range, by an ECU 40, and then the air-fuel ratio of an engine is controlled as the target air-fuel ratio becomes an air-fuel ratio less than the theoretical air-fuel ratio in a high load range. In addition, an intake air quantity is decreased at the time of transferring from the low load range to the high load range, by increasing delay angle from the piston bottom dead point of an intake valve closing timing, and the intake air quantity is increased by decreasing the delay angle from the piston bottom dead point of the intake valve closing timing at the time of transferring from the high load range to the low load range so as to control operation of the valve timing varying means 20.
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Inventors:
Mitsuo Hitomi
Noriyuki Iwata
Noriyuki Iwata
Application Number:
JP30423893A
Publication Date:
June 03, 2003
Filing Date:
December 03, 1993
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F01L13/00; F02B29/08; F02D13/02; F02D41/04; (IPC1-7): F02D13/02; F01L13/00; F02B29/08; F02D41/04
Domestic Patent References:
| JP5209552A | ||||
| JP5215002A | ||||
| JP5215003A | ||||
| JP6117290A | ||||
| JP4265437A | ||||
| JP6198914A |
Attorney, Agent or Firm:
Etsushi Kotani (3 outside)