Measuring and testing – Simulating operating condition – Marine
Reexamination Certificate
2006-07-25
2006-07-25
McCall, Eric S. (Department: 2855)
Measuring and testing
Simulating operating condition
Marine
C073S049700
Reexamination Certificate
active
07080548
ABSTRACT:
A valve control section of a diagnostic device for an evaporated fuel processing system closes an evaporated fuel processing system at closing timing at which a value of the internal pressure detected by an internal pressure detection section reaches a preset target pressure value after a negative pressure is introduced from an inlet system to the evaporated fuel processing system. A diagnostic section of the device compares the internal pressure value at diagnostic timing which is set so as to come after the closing timing with a preset criterion threshold value so as to execute a leak diagnosis of the evaporated fuel processing system. A calculation section of the device variably sets the diagnostic timing based on the intake negative pressure value detected by the intake pressure detection section. Thus, a time period required for an early diagnosis of the leak can be optimized.
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Copending U.S. Appl. No. 11/200,094 filed Aug. 10, 2005, entitled “Diagnostic Apparatus for Evaporative Emission Control System”, and claiming 2004-234648 priority.
Copending U.S. Appl. No. 11/085,272, filed Mar. 22, 2005, entitled “Diagnostic Apparatus for Evaporative Emission Control System”, claiming JP 2004-093477 priority.
Copending U.S. Appl. No. 10/926,295, filed Aug. 26, 2004 entitled “Diagnostic Device of Evaporated Fuel Processing System and the Method Thereof” and claiming JP 2003-304914.
Copending application, being filed concurrently herewith (Aug. 26, 2004) entitled “Diagnostic Device of Evaporated Fuel Processing System and the Method Thereof” and claiming JP 304914 priority.
Fuji Jukogyo Kabushiki Kaisha
McCall Eric S.
Smith , Gambrell & Russell, LLP
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