Everyone usually said that the electronic stability system has many automobile brands, but the names of the manufacturers are different. For example, Bosch’s body electronic stability system is called ESP, Nissan’s vehicle dynamics adjustment system VDC, and Toyota’s research and development. Vehicle stability control system VSC, vehicle stability control system VSA developed by Honda, dynamic stability control system DSC developed by BMW, etc. The electronic stability control system in the broad sense is called ESC.
The role of ESP
The electronic stability system mainly controls the longitudinal and lateral stability of the vehicle to ensure that the vehicle travels according to the driver's consciousness. It is based on the ABS brake anti-lock function. The system brakes hundreds of times in one second when the tire is about to lock in the case of car braking, which is similar to the mechanical “point brakeâ€. In this way, when the vehicle is fully braked, the tire can still ensure rolling, and the rolling friction effect is better than the sliding friction effect after the lock, and the driving direction of the vehicle can be controlled. On the other hand, the system cooperates with the engine ECU. When the driving wheel is slipping, by comparing the rotational speeds of the respective wheels, the electronic system determines whether the driving wheel is slipping, and immediately reduces the throttle intake air amount, reduces the engine speed, and reduces the power output. Brake the slipping drive wheel. This will reduce the slippage and maintain the most appropriate power output between the tire and the ground grip. No matter how oil is applied, the drive wheel will not slip. The system is designed to ensure the lateral stability of the vehicle. When the system detects that the vehicle has understeer or excessive through the signals of the angle sensor, the lateral acceleration sensor and the wheel speed sensor, the system will control the single or multiple wheels to brake. Adjusting the car's lane change or body posture during cornering makes the car more stable and safe when changing lanes or cornering.
component
The SP system consists of a control unit and a steering sensor (to monitor the steering angle of the steering wheel), a wheel sensor (to monitor the speed of each wheel), a side-slip sensor (to monitor the rotation of the body about a vertical axis), and a lateral acceleration sensor (to monitor the car when turning) The centrifugal force) and other components.
Sensors: including steering sensors, wheel sensors, side-slip sensors, lateral acceleration sensors, steering wheel throttle pedal sensors, etc. These sensors are responsible for collecting data on the status of the body.
ESP computer: Calculate the data collected by the sensor, calculate the body status and compare it with the preset data in the memory. When the computer calculation data exceeds the pre-stored value of the memory, that is, when the vehicle body is out of control or has been out of control, the actuator is instructed to work to ensure that the body driving state can satisfy the driver's intention as much as possible.
Actuator: The ESP actuator is a four-wheel brake system. Unlike an ESP-free car, the ESP-equipped car has a pressure-relieving function.
Communication device: ESP light on the dashboard.
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