Method for determining the closing point of a pump piston relative to a transverse bore in the pump cylinder
AssigneeRobert Bosch GmbH
InventorsJurgen Abt, Heins Bollhagen, Dieter Handtmann, Ulrich Kuhn, Sybille Stumpf
Life of this patent
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Abstract
A method for determining the closing point of a pump piston relative to a transverse bore in a corresponding pump cylinder, the method including the steps of providing compressed air to the cylinder via the transverse bore, axially sliding the pump piston near the closing point, consecutively measuring two flow values through a throttle cross-section defined by the pump piston and transverse bore, measuring the positions of the piston corresponding to the two flow values and extrapolating the pump piston unto the closing point from the flow values and piston positions.
Claims8
A method for determining the closing point of a pump piston relative to a transverse bore in a corresponding pump cylinder, the method comprising the steps of:
- axially sliding the pump piston near the closing point;
- consecutively measuring two flow values through a throttle cross-section defined by the pump piston and the transverse bore;
- measuring the positions of the pump piston corresponding to said two flow values;
- and
- extrapolating the pump piston, closing point from said flow values and piston positions;
- and
- using compressed air as a flow medium.
Dependencies are inferred from the claim text.