Title:
AIR-FUEL RATIO CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3196428
Kind Code:
B2
Abstract:
PURPOSE: To decrease the change of the air-fuel ratio at the time of judging the leakage and nullify ill influence due to the shift of the air-fuel ratio by adding the predicted correction amount set previously to the fuel supply amount in synchronization with closing of an atmosphere opening/closing valve when the leak judging condition is met.
CONSTITUTION: An internal combustion engine 2 is equipped with a canister 12 in a communication path 10 leading from a suction passage 4 to a fuel tank 8, and an atmosphere opening/closing valve 14 is installed on this canister 12. A purge valve 20 is installed on a communication path 16 leading from the suction passage 4 to the canister 12, and a pressure sensor 26 is furnished in a communication path 18 leading from the canister 12 to the fuel tank 8. The valve 14 is closed, and the internal pressure of the fuel tank 8 is sunk, and the purge valve 20 is closed, and then the leak condition of the evaporation system is judged. When the leak judging condition is met, a control part 30 works to add the predicted correction amount set previously to the fuel supply amount in synchronization with the closing of the valve 14.
Inventors:
Masaki Narita
Application Number:
JP15276193A
Publication Date:
August 06, 2001
Filing Date:
May 31, 1993
Export Citation:
Assignee:
Suzuki Motor Corporation
International Classes:
F02D41/02; F02D41/04; F02D41/14; F02D45/00; F02M25/08; (IPC1-7): F02D41/14; F02D41/02; F02D41/04; F02D45/00; F02M25/08
Domestic Patent References:
| JP4362264A | ||||
| JP25751A | ||||
| JP4358733A | ||||
| JP4153554A | ||||
| JP4279755A | ||||
| JP3260365A |
Attorney, Agent or Firm:
Yoshimi Saigo