Vehicle brake device

摘要

In a vehicle brake device, when a brake pedal is depressed normally, high regeneration efficiency and high fuel efficiency can be achieved by positively utilizing the regenerative braking force, and early applying of basic hydraulic braking force can be achieved when the brake pedal is suddenly depressed. The vehicle brake device includes an operation force transmitting mechanism on a connecting member between the brake pedal and the master cylinder piston and having first and second rods and a spring member biasing the first and second rods in a direction separating both rods from each other. The operation force transmitting mechanism includes an inner space between both rods and a communication passage allowing communication of the inner space with the exterior. The communication passage restricts the outflow of fluid in the inner space upon an emergency brake pedal depression and allows the outflow thereof upon non-emergency brake pedal depression.

主权项

1. A vehicle brake device comprising:
a hydraulic brake device for generating a basic hydraulic braking force corresponding to a basic hydraulic pressure at each vehicle wheel, by generating the basic hydraulic pressure in response to a brake pedal depression in a master cylinder and by directly supplying the generated basic hydraulic pressure to said each vehicle wheel connected to the master cylinder via a hydraulic passage in which a hydraulic control valve is disposed and a regeneration brake device for generating a regenerative braking force at any of said each vehicle wheel, wherein a vehicle braking force corresponding to a brake pedal operation condition based on the basic hydraulic braking force and the regenerative braking force by cooperation between the hydraulic brake device and the regeneration brake device, characterized in that the vehicle brake device includes: a connecting mechanism for cooperatively connecting the brake pedal and the master cylinder and having a first rod connected to the brake pedal, a second rod connected to the master cylinder, and an inner space at a tip end portion of the first rod and filled with fluid, the second rod being slidably engaged with the tip end portion of the first rod by variably changing the volume of the inner space and a biasing member disposed between the first rod and the second rod and biasing the first and the second rods in a direction where the volume of the inner space increases, and a communication passage for establishing communication between the inside and outside of the inner space wherein upon an emergency depression of the brake pedal, outflow of the fluid in the inner space is restricted and upon a non-emergency depression of the brake pedal, the outflow of the fluid in the inner space is not restricted and wherein, the generation of the basic hydraulic braking force is restricted under a condition that the second rod is slidably moving relative to the first rod and the generation restriction of the basic hydraulic braking force is released under a condition that the second rod is slidably moving together with the first rod.