Delivery device for delivering a medium and for limiting a system pressure
AssigneeContinental Automotive GmbH
InventorRolf GRAF
Life of this patent
Estimating the term…
Abstract
A delivery device for delivering a medium in a vehicle and for limiting a system pressure of the delivery device includes a vehicle pump, which is driven by an electric motor. The electric motor is controlled by a controller, the controller being configured to detect an actual rotational speed of the electric motor and an actual operating current of the electric motor. If the actual operating current of the electric motor exceeds a predefined operating current limit value, the controller is configured to generate a first signal relating to a system pressure being exceeded. The predefined operating current limit value is dependent on the actual rotational speed of the electric motor.
Claims10
1-10. (canceled)
A delivery device for delivering a medium in a vehicle and for limiting a system pressure of the delivery device, the delivery device comprising:
- a vehicle pump;
- an electric motor configured to drive the vehicle pump:
- and
- a controller configured to control the electric motor,
- wherein:
- the controller is configured to ascertain a present rotational speed of the electric motor and a present operating current of the electric motor,
- the controller is configured to generate a first signal relating to a system pressure exceedance of the delivery device if the present operating current of the electric motor exceeds a predefined operating current threshold value, and
- the predefined operating current threshold value is dependent on the present rotational speed of the electric motor.
A method for delivering a medium and for limiting a system pressure of a delivery device having a vehicle pump driven by an electric motor, the method comprising:
- monitoring a present rotational speed and a present operating current of the electric motor, and
- generating a first signal relating to a system pressure exceedance of the delivery device if the present operating current of the electric motor exceeds a predefined operating current threshold value (S2),
- wherein the predefined operating current threshold value is dependent on the present rotational speed of the electric motor.
Dependencies are inferred from the claim text.