Vehicle brake system

Patent metadata

Field	Value
Publication number	US-11370401-B2
Application number	US-201816499063-A
Country	US
Kind code	B2
Filing date	Mar 29, 2018
Priority date	Mar 31, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A highly reliable vehicle brake system including an electric brake is provided.A vehicle brake system (1) includes electric brakes (16a to 16d) provided with motors (80 to 85), drivers (60 to 65) that drive the motors (80 to 85), and a control device that controls the drivers (60 to 65). The electric brake (16a) includes two motors (80 and 81), and the control device includes separate drivers (60 and 61) respectively corresponding to the two motors (80 and 81). The control device includes a first master controller (30) and a first sub-controller (40). The first master controller (30) controls the driver (61) corresponding to the motor (81), and the first sub-controller (40) controls the driver (60) corresponding to the motor 80.

First claim

The invention claimed is:

1. A vehicle brake system comprising:
an electric brake including a first electric actuator and a second electric actuator that presses a friction pad toward a rotor side;
a plurality of drivers that drives the first electric actuator and the second electric actuator; and
a first control device that controls the plurality of drivers,
each of the plurality of drivers corresponding to one of the first electric actuator and the second electric actuator, wherein
the first control device includes a first controller and a second controller,
the first controller controls a driver corresponding to one of the first and second electric actuators, and the second controller controls a driver corresponding to the other of the first and second electric actuators,
the first controller includes:
a first driver control unit; and
a first braking force calculation unit,

the second controller includes:
a second driver control unit; and
a second braking force calculation unit, and

the vehicle brake system further comprising a behavior control unit provided only in the first controller, the behavior control unit configured to control a behavior of a vehicle by controlling the first driver control unit and the second driver control unit.

2. The vehicle brake system according to claim 1 , further comprising:
a second control device including a third controller.

3. The vehicle brake system according to claim 1 , wherein
output signals from the plurality of electric actuators are input into the first controller and the second controller.

4. The vehicle brake system according to claim 1 , wherein
the electric brake including the plurality of electric actuators is provided to a front wheel.

5. The vehicle brake system according to claim 2 , wherein
the third controller includes:
a third driver control unit; and
a third braking force calculation unit.

6. The vehicle brake system according to claim 5 , wherein
the first controller further includes a first determination unit;
the second controller further includes a second determination unit; and
the third controller further includes a third determination unit,
wherein the first determination unit, the second determination unit, and the third determination unit compare calculation results from the first braking force calculation unit, the second braking force calculation unit, and the third braking force calculation unit, and determine a braking force using a majority decision.

7. A vehicle brake system comprising:
an electric brake including a first electric actuator and a second electric actuator that presses a friction pad toward a rotor side;
a first driver that drives the first electric actuator, and a second driver that drives the second electric actuator;
a first control device that controls the first driver,
a second control device, provided separately from the first control device, that controls the second driver, wherein
the first control device includes a first controller, and the second control device includes a second controller,
the first controller includes:
a first driver control unit; and
a first braking force calculation unit, and

the second controller includes:
a second driver control unit; and
a second braking force calculation unit, and

the vehicle brake system further comprising a behavior control unit provided only in the first controller, the behavior control unit configured to control a behavior of the a vehicle by controlling the first driver control unit and the second driver control unit.

Assignees

• Nissin Kogyo Kk
• Veoneer Nissin Brake Sys Japan Co Ltd
• Mitsubishi Motors Corp
• Ntn Toyo Bearing Co Ltd
• Hitachi Astemo Ltd
• Hitachi Astemo Ueda Co Ltd

Inventors

• Satoh Hiromasa
• Obika Toshihiro
• Koga Yusuke
• Toyota Hiromitsu
• Kotera Haruo
• Yamasaki Tatsuya
• Masuda Yui

Classifications

• B60T1/06

  acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission {or on double wheels} · CPC title

• B60T2270/82

  Brake-by-Wire, EHB · CPC title

• B60T1/065

  employing disc (B60T1/062 takes precedence) · CPC title

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• B60T8/17 Primary

  Using electrical or electronic regulation means to control braking {(detecting or indicating faulty operation B60T8/885)} · CPC title