Method for detecting the trapping or twisting of a discharge pipe
AssigneeVitesco Technologies GmbH
InventorThierry Collet
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for detecting pinching or twisting of a discharge pipe connecting a fuel tank and an absorbent filter of an evaporation system of a motor vehicle. The method includes the steps, with the valve being initially in its closed position, of moving the valve by the gases circulating in the absorbent filter, of measuring, in the absence of control of the solenoid, the voltage generated at the terminals of the solenoid by the movement of the valve, and of detecting pinching or twisting of the discharge pipe when the voltage measured is between a first predetermined threshold and a second predetermined threshold.
Claims20
A method for detecting pinching or twisting of a discharge pipe connecting a fuel tank and an absorbent filter of an evaporation system of a motor vehicle, said evaporation system including a pressure regulating device mounted between the absorbent filter and the outside of the vehicle, said pressure regulating device including a solenoid and a valve configured to move between a closed position, in which the valve prevents the gases from passing through the pressure regulating device, and an open position, in which the valve allows the gases to pass from the tank or to the tank, movement of the valve generating a current defining a voltage at terminals of the solenoid when said solenoid is not controlled electrically, the method comprising:
- moving the valve that is initially in the closed position, by the gases circulating in the absorbent filter;
- measuring, in an absence of control of the solenoid, the voltage generated at the terminals of the solenoid by the movement of the valve;
- and
- detecting the pinching or the twisting of the discharge pipe when the measured voltage is between a first predetermined threshold and a second predetermined threshold.
A detection system configured to detect pinching or twisting of a discharge pipe connecting a fuel tank and an absorbent filter of an evaporation system of a motor vehicle, said detection system comprising:
- a controller;
- and
- a pressure regulating device mounted between the absorbent filter and the outside of the vehicle, the pressure regulating device comprising:
- a solenoid,
- a valve configured to move between a closed position, in which the valve prevents the gases from passing through the pressure regulating device, and an open position, in which the valve allows the gases to pass from the tank or to the tank, movement of the valve then defining a voltage at terminals of the solenoid when said solenoid is not controlled electrically, and
- a measurement module configured to measure the voltage generated at the terminals of the solenoid to obtain measurements and to send the measurements to the controller,
- wherein the controller is configured to receive the measurements taken by the measurement module during a movement of the valve from the closed position and to detect the pinching or the twisting of the discharge pipe when the received measurements are between a first predetermined threshold and a second predetermined threshold.
Dependencies are inferred from the claim text.