System Description

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: SYSTEM DESCRIPTION

1. FUNCTION DESCRIPTION

(a) Electronically Controlled Brake System

(1) Upon receiving signals from the skid control ECU, this system effects hydraulic pressure control at the 4 wheels.

(b) Regenerative Brake Cooperative Control

(1) Controls hydraulic braking in order to recover electrical energy by utilizing the regenerative braking of the hybrid system as much as possible.

(c) SPORT Mode

(1) SPORT mode performs integrated control of engine output, traction control and steering control to ensure vehicle running and cornering performance.

(d) Enhanced-VSC (Cooperative Control with EPS)

(1) Effects cooperative control with the power steering ECU in order to provide steering assist in accordance with the operating conditions of the vehicle.

(e) Anti-lock Brake System (ABS)

(1) The ABS helps prevent the wheels from locking when the brakes are applied firmly or when braking on a slippery surface.

(f) Electronic Brake Force Distribution (EBD)

(1) The EBD control utilizes ABS, realizing proper brake force distribution between the front and rear wheels in accordance with the driving conditions. In addition, during braking while cornering, it also controls the brake forces of the right and left wheels, helping maintain vehicle behavior.

(g) Brake Assist (BA)

(1) The primary purpose of BA is to provide an auxiliary brake force to assist a driver who cannot generate a large brake force during emergency braking, thus helping draw the vehicle's braking performance.

(h) Traction Control (TR(A)C)

(1) The TR(A)C helps restrain the slippage of the drive wheels if the driver depresses the accelerator pedal excessively when starting off or accelerating on a slippery surface.

(i) Vehicle Stability Control (VSC)

(1) The VSC helps restrain sideways slippage of the vehicle during a strong front wheel skid or strong rear wheel skid, during cornering.

(j) Hill-start Assist Control

(1) When starting uphill, this control maintains the brake hydraulic pressure to the 4 wheels, in order to momentarily prevent the vehicle from descending backward.

(k) Dynamic Radar Cruise Control (w/ Dynamic Radar Cruise Control System)

(1) When the driving support ECU determines that a large deceleration is required based on the distance to the preceding vehicle and the relative vehicle speed during the dynamic radar cruise control system operation, the skid control ECU operates the brake system according to the signal from the driving support ECU.

(l) Pre-collision Control (w/ Pre-collision System)

(1) When the driving support ECU determines a high possibility of collision, the skid control ECU activates the pre-collision brake assist or the pre-collision brake according to the signal from the driving support ECU.

2. FUNCTION OF COMPONENTS