Air/fuel ratio control apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 1999
Issued Date -
N/A
app pub date -
Jun 24, 1997
filing date -
May 9, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Fuel vapor is produced in a fuel tank and absorbed in a canister. The absorbed fuel vapor is purged through a purge passage into an engine induction passage under predetermined engine operating conditions. A purge valve is provided in the purge passage to regulate the supply of gaseous mixture, including the absorbed fuel vapor, into the engine. A purge rate factor is determined corresponding to the concentration of evaporated fuel in the gaseous mixture. The concentration is determined utilizing the temperature of the fuel in the fuel tank.
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