Vehicle braking device

Patent metadata

Field	Value
Publication number	US-11673540-B2
Application number	US-202016832879-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Apr 3, 2019
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A vehicle braking device includes: a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin. The brake fluid pressure generation device includes a cylinder and pistons configured to slide inside the cylinder. The brake fluid pressure generation device is configured to generate brake fluid pressure in accordance with strokes of the pistons. The brake fluid pressure generation device is arranged such that a sliding direction of the pistons is along a direction different from the vehicle front-rear direction in a plan view.

First claim

What is claimed is:

1. A vehicle braking device comprising:
a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and
a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin, wherein:
the brake fluid pressure generation device includes a reserve tank, a cylinder and pistons configured to slide inside the cylinder, wherein the reserve tank is provided above the cylinder;
the brake fluid pressure generation device is configured to generate brake fluid pressure in accordance with strokes of the pistons;
the brake fluid pressure generation device is arranged such that a sliding direction of the pistons is along a direction different from a vehicle front-rear direction in a plan view; and
the reserve tank is configured to extend in the same direction as an extending direction of the cylinder extending in the sliding direction of the pistons.

2. The vehicle braking device according to claim 1 , wherein the brake fluid pressure generation device is arranged such that an angle formed between the sliding direction of the pistons and a vehicle width direction is smaller than an angle formed between the sliding direction of the pistons and the vehicle front-rear direction in a plan view.

3. The vehicle braking device according to claim 1 , wherein the brake fluid pressure generation device is arranged such that the sliding direction of the pistons is parallel to a vehicle width direction.

4. The vehicle braking device according to claim 1 , wherein the storage chamber includes a pushing member configured to cause the pistons to stroke by pushing the pistons.

5. The vehicle braking device according to claim 1 , wherein the vehicle is a vehicle in which automated driving is enabled.

6. A vehicle braking device comprising:
a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and
a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin, wherein:
the brake fluid pressure generation device includes a first brake fluid pressure generation device including a first fluid pressure source, and a second brake fluid pressure generation device including a second fluid pressure source; and
the first brake fluid pressure generation device and the second brake fluid pressure generation device are arranged so as to at least partially overlap each other in a vehicle front-rear direction when the first brake fluid pressure generation device and the second brake fluid pressure generation device are viewed from a vehicle width direction,
wherein the first brake fluid pressure generation device includes at least one of a reserve tank and a brake electronic control unit, and
wherein the second brake fluid pressure generation device includes at least one of a reserve tank and a brake electronic control unit.

7. The vehicle braking device according to claim 6 , wherein the vehicle is a vehicle in which automated driving is enabled.

8. A vehicle braking device comprising:
a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and
a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin, wherein:
the brake fluid pressure generation device includes a reserve tank, a fluid pressure source, and a brake electronic control unit;
the reserve tank, the fluid pressure source, and the brake electronic control unit are arranged in an upper part of the storage chamber so as to at least partially overlap each other in a vehicle front-rear direction when the reserve tank, the fluid pressure source, and the brake electronic control unit are viewed from a vehicle width direction,
the brake fluid pressure generation device includes a cylinder and pistons configured to slide inside the cylinder in the vehicle width direction; and
the reserve tank is configured to extend in the same direction as an extending direction of the cylinder extending in the sliding direction of the pistons.

9. The vehicle braking device according to claim 8 , wherein:
the cylinder, the reserve tank, the fluid pressure source, and the brake electronic control unit are arranged in the upper part of the storage chamber so as to at least partially overlap each other in the vehicle front-rear direction when the cylinder, the reserve tank, the fluid pressure source, and the brake electronic control unit are viewed from the vehicle width direction.

10. The vehicle braking device according to claim 8 , wherein the vehicle is a vehicle in which automated driving is enabled.

11. A vehicle braking device comprising:
a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and
a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin, wherein:
the brake fluid pressure generation device includes a first brake fluid pressure generation device including a first fluid pressure source, and a second brake fluid pressure generation device including a second fluid pressure source; and
the first brake fluid pressure generation device and the second brake fluid pressure generation device are arranged in an upper part of the storage chamber so as to be adjacent to each other in the same horizontal plane,
wherein the first brake fluid pressure generation device includes at least one of a reserve tank and a brake electronic control unit, and
wherein the second brake fluid pressure generation device includes at least one of a reserve tank and a brake electronic control unit.

12. The vehicle braking device according to claim 11 , wherein the vehicle is a vehicle in which automated driving is enabled.

13. The vehicle braking device according to claim 1 , wherein the brake operation part is operated by a foot of an occupant.

14. The vehicle braking device according to claim 11 , wherein at least one of the first brake fluid pressure generation device and the second brake fluid pressure generation device includes the reserve tank.

Assignees

• Toyota Motor Co Ltd

Inventors

• Fujimoto Tetsuya
• Konno Ikuru
• Kubo Takenori

Classifications

• B60T2270/402

  Back-up · CPC title

• B60T8/4018 Primary

  Pump units characterised by their drive mechanisms (B60T8/4095 takes precedence) · CPC title

• B60T13/745

  acting on a hydraulic system, e.g. a master cylinder · CPC title

• B60T11/16 Primary

  Master control, e.g. master cylinders (master cylinders associated with vacuum boosters B60T13/565) · CPC title

• B60T13/14

  using accumulators or reservoirs {fed by pumps} · CPC title