Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2004-03-04
2009-02-24
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
C137S554000
Reexamination Certificate
active
07493895
ABSTRACT:
A system for the metered feeding of volatile fuel components, in particular into the intake manifold of an internal combustion engine of a motor vehicle, includes an electromagnetic canister-purge valve which is actuatable in proportional pulse-width modulation, and a closed-loop control circuit with which, for the purpose of compensating for external interferences, the coil current of the canister-purge valve is adjustable. The system is characterized in that at least one device provided for detecting a variable parameter that includes at least one of a mass flow through the valve, a volume flow through the valve, a distance between the valve seat and the sealing element of the valve, and a CHxportion in the volume flow. The coil current is adjustable as a function of the parameter.
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Gerlich Torsten
Klatt Christopher
Klesen Christof
Carl Freudenberg KG
Castro Arnold
Cronin Stephen K
Harness & Dickey & Pierce P.L.C.
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