Method for checking the operativeness of a tank-ventilation...

Details Method for checking the operativeness of a tank-ventilation... Method for checking the operativeness of a tank-ventilation...

Filed on

2006-05-23

Date issued

2006-05-23

Examiner

McCall, Eric S. (Department: 2855)

Patent Class

Measuring and testing

SubClass

Simulating operating condition

SubSubClass

Marine

Type

Reexamination Certificate

Status

active

Patent number

07047798

Description

ABSTRACT:
A method for checking the operativeness of a tank-ventilation valve of a tank-ventilation system of a motor vehicle is characterized by the following steps: the tank-ventilation valve is triggered in a stepped manner in a preselectable working point; the intake-manifold pressure (pintake manifold) is measured and modeled in the process; the measured intake-manifold pressure (pintake manifold) is compared to the modeled intake-manifold pressure and an operative tank-ventilation valve assumed if a correlation within preselected limits is given; otherwise, a defective tank-ventilation valve is assumed.

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