Method and device for checking the state of the outlet valves of an engine of a motor vehicle
AssigneeVitesco Technologies GmbH
InventorsTobias Braun, Jürgen Dingl
Life of this patent
Estimating the term…
Abstract
Various embodiments of the teachings herein include methods for operating a motor vehicle having combustion chambers. The methods may include: closing the combustion chambers of the motor vehicle towards the exhaust tract by bringing outlet valves of the combustion chambers into the closed state; checking whether the outlet valves of the combustion chambers of the motor vehicle are in a closed state by evaluating the pressure prevailing in an intake pipe of the motor vehicle; and in the event one or more of the outlet valves are not in a closed state, initiating countermeasures to comply with emissions protocols.
Claims9
A method for operating a motor vehicle having multiple combustion chambers, each with a respective outlet valve, the method comprising:
- closing all of the combustion chambers of the motor vehicle towards the exhaust tract at the same time by actuating each of the outlet valves of the combustion chambers toward a closed state;
- checking whether each of the outlet valves of the combustion chambers of the motor vehicle is in the respective closed state by evaluating the pressure prevailing in an intake pipe of the motor vehicle;
- and
- in the event one or more of the outlet valves are not in a closed state, initiating countermeasures to comply with emissions protocols;
- wherein evaluating the pressure prevailing in an intake pipe of the motor vehicle includes:
- determining the peak pressure values of the pressure profile;
- and comparing the determined peak pressure values with stored peak pressure values for normal operation of the motor vehicle.
A device for operating a motor vehicle having combustion chambers, the device comprising a control unit programmed to:
- signal one or more actuators to close all of the combustion chambers of the motor vehicle towards the exhaust tract at the same time by bringing outlet valves of the combustion chambers into the closed state;
- check whether the outlet valves of the combustion chambers of the motor vehicle are in a closed state by evaluating the pressure prevailing in an intake pipe of the motor vehicle;
- and
- in the event one or more of the outlet valves are not in a closed state, initiate countermeasures to comply with emissions protocols;
- wherein evaluating the pressure prevailing in an intake pipe of the motor vehicle includes:
- determining the peak pressure values of the pressure profile;
- and comparing the determined peak pressure values with stored peak pressure values for normal operation of the motor vehicle.
Dependencies are inferred from the claim text.