Master brake cylinder arrangement with actuation detection for a motor vehicle brake system
First Claim
1. A master brake cylinder arrangement with actuation detection for a motor vehicle braking system with at least one piston arrangement with a piston which is dislocatably guided in a cylinder bore in a cylinder housing, wherein the piston confines a pressure chamber with the cylinder bore which is fluidically coupled with a hydraulic brake circuit, and can be dislocated during a forward stroke from an initial position toward an actuated position along a dislocation axis which substantially coincides with a longitudinal axis of the cylinder bore, and is dislocated from the actuated position to the initial position during a back stroke, wherein a coupling element is assigned to the piston which is coupled for a common dislocation to a position detection rod which is dislocatably guided substantially in parallel to the first cylinder bore, wherein the position of the position detection rod is detectable with a position detection sensor attached to the cylinder housing,wherein the coupling element is lockable relative to the piston for a common stroke movement with the latter and after over-travelling of a predetermined distance of the stroke movement, the piston is further dislocatable relative to the coupling element.
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Accused Products
Abstract
The invention relates to a master brake cylinder arrangement with actuation detection for a motor vehicle braking system, having at least one piston arrangement with a piston, which is movably guided in a cylinder bore in a cylinder housing, said piston with the cylinder bore defining a pressure chamber which is fluidically coupled to a hydraulic brake circuit. During a forward stroke, the piston can be moved from a start position into a possible actuation piston along a movement axis, which coincides essentially with a longitudinal axis of the cylinder bore, and during a return stroke, said piston is moved from an actuation position into a start position. The piston is associated with a coupling element which is coupled to a position detecting rod for common movement therewith, said position detecting rod being moved essentially parallel to the first cylinder bore, the position of the position detecting rod can be detected by means of a position detecting sensor placed on the cylinder housing. According to the invention, in order to save space, the coupling element can be locked relative to the piston for a common lift movement therewith and after exceeding a predetermined path of the lift movement, the piston can be moved further relative to the coupling element.
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Citations
15 Claims
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1. A master brake cylinder arrangement with actuation detection for a motor vehicle braking system with at least one piston arrangement with a piston which is dislocatably guided in a cylinder bore in a cylinder housing, wherein the piston confines a pressure chamber with the cylinder bore which is fluidically coupled with a hydraulic brake circuit, and can be dislocated during a forward stroke from an initial position toward an actuated position along a dislocation axis which substantially coincides with a longitudinal axis of the cylinder bore, and is dislocated from the actuated position to the initial position during a back stroke, wherein a coupling element is assigned to the piston which is coupled for a common dislocation to a position detection rod which is dislocatably guided substantially in parallel to the first cylinder bore, wherein the position of the position detection rod is detectable with a position detection sensor attached to the cylinder housing,
wherein the coupling element is lockable relative to the piston for a common stroke movement with the latter and after over-travelling of a predetermined distance of the stroke movement, the piston is further dislocatable relative to the coupling element.
Specification