VEHICULAR HYDRAULIC-PRESSURE-GENERATION DEVICE AND VEHICULAR BRAKING-FORCE GENERATION DEVICE.

摘要

A vehicular hydraulic-pressure-generation device (14) wherein a first bush (75) compressively deforms due to pressure from a simulator piston (67) that moves when hydraulic pressure produced when a brake pedal (12) is depressed is transmitted into a cylinder part (66). Said vehicular hydraulic-pressure-generation device thus creates artificial reaction-force characteristics with respect to the position of the brake pedal (12). The aforementioned first bush (75) has a third elastic modulus, which is smaller than a second elastic modulus, and is provided in parallel with a first return spring (68a). The compressive deformation of the first bush (75) occurs over a second region (l2) that overlaps a first region (l1) in which compressive deformation of the return spring (68a) primarily occurs. This makes the brake pedal move more smoothly, reducing the feeling of incongruity resulting from a V-shaped singularity in the reaction-force characteristics with respect to brake pedal position at the point where linear characteristics due to a first elastic modulus switch to linear characteristics due to the second elastic modulus.