Brake apparatus for a vehicle
AssigneeAdvics Co., Ltd.
InventorAkihito Kusano
Life of this patent
Estimating the term…
Abstract
When a stroke of a manually operated braking member is equal to or smaller than a predetermined stroke, a master pressure chamber of a master cylinder is communicated with an atmospheric pressure reservoir, and an electromagnetic valve and a hydraulic pressure pump are controlled to supply the hydraulic pressure to wheel brake cylinders according to an amount of operation of the manually operated braking member detected by a braking operation detection device. An orifice is provided in a passage between the master pressure chamber and the atmospheric pressure reservoir, and a check valve is disposed in parallel with the electromagnetic valve to allow a flow of the brake fluid from the master cylinder to the wheel brake cylinders, and prohibit its reverse flow.
Claims8
A brake apparatus for a vehicle comprising:
- a master cylinder having a master piston moved in response to operation of a manually operated braking member, and a master pressure chamber for generating hydraulic pressure according to an amount of operation of said manually operated braking member including a stroke of said manually operated braking member;
- wheel brake cylinders operatively mounted on wheels of said vehicle for applying braking force to said wheels, with the hydraulic pressure fed from said master cylinder;
- an atmospheric pressure reservoir for storing brake fluid to supply the brake fluid to said master cylinder, said master pressure chamber being communicated with said atmospheric pressure reservoir when the stroke of said manually operated braking member is equal to or smaller than a predetermined stroke;
- an electromagnetic valve disposed in a passage between said master cylinder and said wheel brake cylinders;
- braking operation detection means for detecting the amount of operation of said manually operated braking member;
- a hydraulic pressure pump with an output port thereof connected to a passage between said electromagnetic valve and said wheel brake cylinders;
- control means for controlling said electromagnetic valve and said hydraulic pressure pump to supply the hydraulic pressure to said wheel brake cylinders according to the amount of operation of said manually operated braking member detected by said braking operation detection means, when the stroke of said manually operated braking member is equal to or smaller than the predetermined stroke;
- an orifice provided in a passage between said master pressure chamber and said atmospheric pressure reservoir;
- and
- a first check valve disposed in parallel with said electromagnetic valve to allow a flow of the brake fluid from said master cylinder to said wheel brake cylinders, and prohibit a reverse flow of the brake fluid.
Dependencies are inferred from the claim text.