Device and method for monitoring a tank ventilation system

Details Device and method for monitoring a tank ventilation system Device and method for monitoring a tank ventilation system

2006-03-28

2006-03-28

McCall, Eric S. (Department: 2855)

Measuring and testing

Simulating operating condition

Marine

Reexamination Certificate

active

07017402

ABSTRACT:
The invention relates to a device and a method for testing a tank ventilation system with a tank ventilation valve in a motor vehicle, comprising an engine speed sensor, an air flow sensor and/or an idle controller for providing an air mass signal, as well as an evaluating unit, which compares the changes in speed and air masses with at least one threshold value when the tank ventilation valve is opened and closed. To improve the diagnosis of the tank ventilation system, it is proposed that the evaluating unit be designed in such a manner that a total reaction value, which is compared with a threshold value, is formed from the engine speeds when the tank ventilation valve is opened and closed as well as the air masses when the tank ventilation valve is closed and opened.

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