INTAKE DEVICE OF ENGINE PROVIDED WITH SUPERCHARGER

Japanese Patent JP3280758

B2

PURPOSE: To decrease an exhaust temperature so as to be held to the allowable a limited exhaust temperature or less by providing an EGR control means for enhancing the EGR ratio when the exhaust temperature rises to the prescribed allowable limited exhaust temperature due to an increase in the engine speed.
CONSTITUTION: The fuel injection amounts of first and second fuel injection valves 5a, 5b of respective cylinders 1 to 6 are respectively controlled by a control unit 10. In an engine VE, the control unit 10 suitable controls the opening/closing timing of intake valves 1a, 1b, the EGR ratio, the pressurized air relief amount and the air-fuel ratio on the basis of the engine speed, the S/C discharge temperature and the exhaust temperature, so as to prevent knocking from being generated in all driving range. Thereby, when the exhaust temperature is raised to the fixed allowable limited exhaust temperature due to an increase in the engine speed during its operation, the EGR ratio is enhanced by enlarging the opening of the second EGR valve 42, and the exhaust temperature is lowered so as to be held to the allowable limited exhaust temperature or less.

Junzo Sasaki
Mikihiro Fujii
Takeshi Takayama
Tatsuya Uesugi

JP16702693A

May 13, 2002

July 06, 1993

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Mazda Corporation Inc

F01L1/34; F02B29/08; F02B33/00; F02D13/02; F02D21/08; F02D23/00; F02D41/02; F02D41/04; F02D43/00; F02M25/07; (IPC1-7): F02D13/02; F01L1/34; F02B29/08; F02B33/00; F02D21/08; F02D23/00; F02D41/02; F02D41/04; F02D43/00; F02M25/07

JP559975A
JP374560A
JP62240427A

Aoyama Ryo (1 person outside)

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