Electronic braking device

A braking device for a vehicle, the braking device comprising:

• a wheel braking member,
• a brake operating unit operatively connected to the wheel braking member such that fluid pressure applied to the wheel braking member changes according to the extent of operation of the brake operating unit,
• a master cylinder operatively connected to the brake operating unit,
• a pressure reducing device, and
• a fluid pressure sensor for detecting fluid pressure in a master cylinder,
• wherein when fluid pressure above a prescribed level is applied to said master cylinder, the pressure reducing device relieves the fluid pressure in the master cylinder.

A braking device for a vehicle, the braking device comprising

• a wheel braking member,
• a brake operating unit operatively connected to said braking member,
• a fluid pressure sensor for detecting a fluid pressure applied to said braking member, and
• a pressure reducing device,
• wherein the fluid pressure applied to the wheel braking member changes according to the extent of operation of the brake operating unit, and
• wherein when a prescribed fluid pressure is applied to said braking member, the pressure reducing device relieves the fluid pressure in said braking member.

An electronic braking device for a vehicle, the braking device comprising

• a master cylinder,
• a wheel braking member connected to the master cylinder by a main brake fluid passage,
• a brake operating unit operatively connected to the wheel braking member such that fluid pressure applied to the wheel braking member changes according to the extent of operation of the brake operating unit,
• a normally open valve disposed in the main brake fluid passage between the master cylinder and the wheel braking member,
• a first pressure sensor disposed between the master cylinder and the valve,
• a second pressure sensor disposed between the master cylinder and the valve, and
• a controller which controls the valve based on detected pressures of the first pressure sensor and the second pressure sensor,
• wherein the first pressure sensor detects a pressure range below that of the second pressure sensor.

A braking device for a vehicle, the braking device comprising:

• a wheel braking member,
• a brake operating unit operatively connected to the wheel braking member such that a fluid pressure applied to the wheel braking member changes according to the extent of operation of the brake operating unit,
• a master cylinder interlocked with the brake operating unit,
• a main brake fluid passage between the master cylinder and the braking member,
• an electromagnetic valve disposed in the main brake fluid passage,
• a first pressure reducing device connected to the main brake fluid passage between the valve and the master cylinder,
• a first fluid pressure sensor for detecting the fluid pressure in a master cylinder, the first fluid pressure sensor connected to the main brake fluid passage between the valve and the master cylinder,
• a second pressure reducing device connected to the main brake fluid passage between the valve and the braking member, and
• a second fluid pressure sensor for detecting the fluid pressure in the braking member, the second fluid pressure sensor connected to the main brake fluid passage in an area between the valve and the braking member.