Patent · US Active

Procedure for the functional diagnosis of an activateable fuel tank ventilation valve of a fuel tank system of an internal combustion engine

US7578286B2 · kind B2 · utility

0Cited by

3References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Andreas Baumann · Münsingen, CH
Andreas Mueller · Kaufbeuren, DE
Andreas Pape · Brakel, DE
Ralf Gal · Lambach, DE

Key dates

Filing date	Jan 23, 2007
Grant date	Aug 25, 2009
Priority date	—
Expiry date	Jan 23, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M25/0809
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a procedure for the functional diagnosis of an activateable fuel tank ventilation valve of the fuel tank system of an internal combustion engine, especially of a motor vehicle, whereby in specifiable time intervals when the fuel tank ventilation valve is activated to open, regeneration gas is added to the air drawn into the combustion chamber, whereby fuel is delivered to the combustion chamber, whereby the fuel, the air, respectively the fuel, the air and the regeneration gas are combusted in the combustion chamber and whereby by comparison of at least one operating parameter, which characterizes the combustion of fuel and intake air with the corresponding operating parameter, which characterizes the combustion of fuel, intake air and regeneration gas, inference can be made about the functional capability of the fuel tank ventilation valve, the HC-concentration of the regeneration gas is specifically affected by changing the regeneration gas stream.

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