VEHICLE BRAKE SYSTEM
A highly reliable vehicle brake system that includes an electric brake and achieves redundancy at low cost is provided. A vehicle brake system ( 1 ) includes electric brakes ( 16 a to 16 d) that include at least one unit of motors ( 80 and 81 ), and first and second control devices ( 10 and 11 ) that include a master controller ( 30 ) and a first sub-controller ( 40 ) that are connected to one another. The master controller ( 30 ) includes a driver control unit ( 301 ) that can control drivers ( 61 and 63 ), and a braking force calculation unit that calculates braking force of the electric brakes ( 16 a to 16 d). The first sub-controller ( 40 ) includes a driver control unit that controls a driver ( 60 ), and a braking force calculation unit that calculates braking force of the electric brakes ( 16 a to 16 d). The master controller ( 30 ) and the first sub-controller ( 40 ) include a determination unit that compares braking force calculation results of other controllers to determine braking force.
1 . A vehicle brake system comprising:
an electric brake including at least one unit of an electric actuator that presses a friction pad toward a rotor side;
a driver that drives the electric actuator; and
a control device including a plurality of controllers connected to one another,
the plurality of controllers including:
a master controller having a driver control unit that controls the driver, a braking force calculation unit that calculates braking force of the electric brake, and a behavior control unit that controls a behavior of a vehicle; and
a sub-controller having a driver control unit that controls the driver, and a braking force calculation unit that calculates braking force of the electric brake, and
each of the master controller and the sub-controller including a determination unit that compares a braking force calculation result of another controller among the plurality of controllers to determine braking force.
2 . The vehicle brake system according to claim 1 , further comprising
a slave controller having a driver control unit that controls the driver based on a braking force calculation result of at least one of the master controller and the sub-controller.
3 . The vehicle brake system according to claim 2 , wherein
the control device includes a first control device and a second control device;
the first control device includes the master controller; and
the second control device includes the sub-controller and the slave controller.
4 . The vehicle brake system according to claim 1 , wherein
the control device includes a first control device and a second control device;
the first control device includes at least one unit of the master controller; and
the second control device includes at least one unit of the sub-controller.
5 . The vehicle brake system according to claim 1 , wherein
the control device includes a first control device and a second control device;
the first control device includes, at least, one unit of the master controller and one unit of the sub-controller; and
the second control device includes at least one unit of the sub-controller.
6 . The vehicle brake system according to claim 1 , wherein
the control device includes a first control device and a second control device;
the first control device includes the master controller and at least two units of the sub-controller; and
the second control device includes at least one unit of the sub-controller.
7 . The vehicle brake system according to claim 2 , wherein
the control device includes a first control device and a second control device;
the first control device includes the master controller, the sub-controller, and the slave controller; and
the second control device includes at least one unit of the sub-controller.
8 . The vehicle brake system according to claim 1 , wherein
the vehicle is a vehicle with four wheels;
the electric brake is provided to each of the four wheels;
the control device includes a first control device and a second control device;
the first control device includes at least one unit of the master controller;
the second control device includes at least two units of the sub-controller; and
the sub-controller controls the drivers of the electric actuators provided to two of the four wheels that are arranged diagonally.
9 . The vehicle brake system according to claim 8 , wherein
the sub-controller further controls the driver of the electric actuator provided to a front wheel other than the two of the four wheels.