Piston pump for a hydraulic brake system of a vehicle
AssigneeRobert Bosch GmbH
InventorsHeinz Siegel, Dieter Merklein, Joachim Ehrlich, Andreas Weh, Michael Hellebrandt, Tobias Fluck, Michael Schlitzkus
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Abstract
A piston pump for a hydraulic brake system for a vehicle with a slip control system. For economical production, the piston pump includes a piston as a composites part with a core of steel that is surrounded by a lubricant jacket of plastic. By way of example, the lubricant jacket is applied to the core by spray-coating, or is pressed onto the core or slipped onto the core. The lubricant jacket economizes by dispensing with expensive post-machining of the piston surface by grinding, for instance, and improves the sliding properties of the piston.
Claims20
A piston pump of a vehicle brake system having a pump housing, a cylinder bore in said pump housing, a piston that is driven to execute an axially reciprocating stroke motion is displaceably guided in said pump housing, the piston (40) is a composite part, which has a core (42) that has a lubricant jacket (44) of plastic on its circumference, and in which the piston pump has a check valve (62) which is inserted into the lubricant jacket (44).
A piston pump of a vehicle brake system having a pump housing, a cylinder bore in said pump housing, a piston that is driven to execute an axially reciprocating stroke motion is displaceably guided in said pump housing, the piston (40) is a composite part, which has a core (42) that has a lubricant jacket (44) of plastic on its circumference, and in which the lubricant jacket (44) engages a retaining face (90), provided on the piston (40) from behind.
Dependencies are inferred from the claim text.