Patent ID: 6564694
Filing Date: 2003-05-20
Classification: B60T,F02B

Abstract:
A braking master cylinder for an automotive electrohydraulic braking system that responds to operation of a brake pedal, the braking master cylinder comprising:a cylinder housing having a main bore; a piston slidingly received for movement in the main bore and longitudinally positioned by the brake pedal; a magnet coupled to the piston; and a noncontact sensor coupled to the cylinder housing for generating a position signal corresponding to proximity of the noncontact sensor to the magnet; wherein the noncontact sensor comprises at least two Hall Effect transducers longitudinally spaced and proximate to the main bore; and further wherein each Hall Effect transducer produces an output signal having a positively sloped linear region and a negatively sloped linear region, the longitudinal spacing of adjacent transducers selected to have at least one linear region available from at least one transducer for each position of the magnet.