초록 ▼

A brake pedal for a motor vehicle brake-by-wire brake system including a pedal lever pivotally supported on a body of the motor vehicle, a foot pad on the pedal lever, and a compliant member having a plurality of parallel beams defining cantilever springs. A pedal force on the foot pad effects pedal

A brake pedal for a motor vehicle brake-by-wire brake system including a pedal lever pivotally supported on a body of the motor vehicle, a foot pad on the pedal lever, and a compliant member having a plurality of parallel beams defining cantilever springs. A pedal force on the foot pad effects pedal travel of the pedal lever from a release position toward a brake full apply position. The parallel beams defining cantilever springs are arrayed in series between the pedal lever and the motor vehicle body and engage is series so that the effective stiffness of the compliant member increases during pedal travel. The stiffness of each of the parallel beams and the magnitudes of a plurality of clearance spans therebetween are "tuned" to yield a pedal force which initially increases slowly relative to pedal travel and then increases exponentially relative to pedal travel thereby emulating the relationship between pedal force and pedal travel of a brake pedal in a traditional motor vehicle brake system. Elastic pads on the parallel beams cushion the successive engagements of the parallel beams and blend the corresponding changes in stiffness of the compliant member.

대표청구항 ▼

[ What is claimed is:] [1.]1. A motor vehicle brake pedal for a brake-by-wire brake system including a pedal lever pivotally supported at an inboard end thereof on a body of the motor vehicle for pedal travel from a release position to a brake full apply position, an abutment means on the pedal leve

[ What is claimed is:] [1.]1. A motor vehicle brake pedal for a brake-by-wire brake system including a pedal lever pivotally supported at an inboard end thereof on a body of the motor vehicle for pedal travel from a release position to a brake full apply position, an abutment means on the pedal lever, a compliant member on the body of the motor vehicle engageable by the abutment means on the pedal lever during pedal travel, and a foot pad on the pedal lever outboard of the abutment means whereat a pedal force is applied to effect pedal travel of the pedal lever from the release position to the brake full apply position against an effective stiffness of the compliant member, characterized in that the compliant member comprises:a base;a plurality of distinct parallel beams projecting from the base, each of the beams having a flexible portion including a free end, the flexible portion being resiliently flexible in beam bending, each of the beams being spaced from an adjacent one of the beams by a clearance span that permits bending through an initial range without engaging the adjacent one of the beams but ensures engagement with the adjacent one of the beams in beam bending beyond the initial range, whereby an effective stiffness of the compliant member is increased by successive serial engagement of each of the beams with the adjacent one of the beams during extended bending of an end one of the beams, andthe base having a mounting means operative to support the compliant member on the body of the motor vehicle with the end one of the beams disposed facing the abutment means of the pedal lever for engagement therewith and extended bending thereof during pedal travel of the pedal lever from the release position to the full brake apply position.