Patent · US Expired

System for the metered feeding of volatile fuel components

US7493895B2 · kind B2 · utility

0Cited by

19References

6Claims

0Family size

Assignee

Carl Freudenberg KG · DE

Inventors

Christopher Klatt · Heidelberg, DE
Torsten Gerlich · Bensheim, DE
Christof Klesen · Seeheim-Jugenheim, DE

Key dates

Filing date	Mar 4, 2004
Grant date	Feb 24, 2009
Priority date	—
Expiry date	Mar 4, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/8242
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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 CHx portion in the volume flow. The coil current is adjustable as a function of the parameter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.