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 (320) connecting a fuel tank (20) and an absorbent filter (310) of an evaporation system (30) of a motor vehicle (1), wherein, with said evaporation system (30) comprising a pressure regulating device (420) mounted between the absorbent filter (310) and the outside of the vehicle (1) and said pressure regulating device (420) comprising a solenoid (421) and a valve (422), said valve (422) being configured to move between a closed position, in which the valve prevents the gases from passing through the pressure regulating device (420), and an open position, in which the valve allows the gases to pass from the tank (20) or to the tank (20), the movement of the valve (422) generating a current defining a voltage (U) at the terminals of the solenoid (421) when said solenoid (421) is not controlled electrically, the method comprises the following steps:
- with the valve (422) being initially in the closed position, moving (E1) the valve (422) by the gases circulating in the absorbent filter (310),
- measuring (E2), in the absence of control of the solenoid (421), the voltage (U) generated at the terminals of the solenoid (421) by the movement of the valve (422),
- detecting (E3) pinching or twisting of the discharge pipe (320) when the voltage (U) measured is between a first predetermined threshold (S1) and a second predetermined threshold (S2).
A system (40) for detecting pinching or twisting of a discharge pipe (320) connecting a fuel tank (20) and an absorbent filter (310) of an evaporation system (30) of a motor vehicle (1), said detection system (40) comprising:
- a control module (410),
- a pressure regulating device (420), mounted between the absorbent filter (310) and the outside of the vehicle (1), comprising:
- a solenoid (421),
- a valve (422) configured to move between a closed position, in which the valve prevents the gases from passing through the pressure regulating device (420), and an open position, in which the valve allows the gases to pass from the tank (20) or to the tank (20), the movement of the valve then defining a voltage (U) at the terminals of the solenoid (421) when said solenoid (421) is not controlled electrically, and
- a measurement module (430) configured to measure the voltage (U) generated at the terminals of the solenoid (421) and to send these measurements to the control module (410),
- the control module (410) being configured to receive the measurements taken by the measurement module (430) during a movement of the valve (422) from the closed position and to detect pinching or twisting of the discharge pipe (320) when the measurements received are between a first predetermined threshold (S1) and a second predetermined threshold (S2).
Dependencies are inferred from the claim text.