Method and device for detecting the speed of a pump
AssigneeRobert Bosch GmbH
InventorsHolger Sievert, Juergen Hachtel, Guenther Hertlein
Life of this patent
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Abstract
A method and a system for detecting the speed of a pump motor of a hydraulic pump system are provided, in which pump system a pump is driven by a pump motor to deliver hydraulic fluid into a pump reservoir. In accordance with the present invention, a pressure signal representing the fluid-delivery activity of the pump is detected, and the pressure peaks within this pressure signal identified. The speed of the pump motor is determined on the basis of the frequency or the time intervals of these pressure peaks.
Claims17
A method for detecting a speed of a pump motor of a hydraulic pump system, the pump system having a pump driven by the pump motor to deliver hydraulic fluid into a pump reservoir, comprising:
- detecting a pressure signal representing a fluid-delivery activity of the pump;
- determining pressure peaks within the pressure signal;
- and
- determining the speed of the pump motor based on the frequency of the pressure peaks.
A device for detecting a speed of a pump motor of a hydraulic pump system, the pump system also having a pump driven by the pump motor to deliver hydraulic fluid into a pump reservoir, comprising:
- a sensor arrangement for detecting a pressure signal representing a fluid-delivery activity of the pump, and for determining pressure peaks within the pressure signal;
- and
- a computing arrangement for determining the speed of the pump motor based on the frequency of the pressure peaks.
Dependencies are inferred from the claim text.