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1. ESP (Electronic Stability Program)
1) Overview
As the single-track vehicle model used for the calculations is only valid for a vehicle moving
forward, ESP intervention never takes place during backup.
The ESP system includes the ABS/EBD and ASR systems allowing the system to be able to
operate depending to the vehicle driving conditions.
Integrated functions in ESP system:
- HBA: Hydraulic Brake Assist System (Increases braking force)
- ARP: Active Rollover Protection System (Controls the engine output and braking force)
- HDC: Hill DescentControl System (Allows the vehicle to go down the steep hill slowly)
For example, when the brakes are applied during cornering at the speed of 100 km/h, the
ABS will operate at the same time the ASR or ABD systems operate to reduce the power from
the slipping wheel. And when yaw rate sensor detects the rate exceeding 4 degree/seconds,
the ESP system is activated to apply the brake force to the corresponding wheel to
compensate the yaw moment with the vehicle stability control function. This may cause a
problem in vehicle control system due to multi-operation of systems, thus there is a priority
as below:
4892-01
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