A descent control system and method
A technology of control system and slope, applied in control driving, electric vehicles, electric energy management, etc., can solve problems such as vehicle operation hazards, insufficient torque reduction, excessive torque increase, etc., to maintain steering stability, reduce investment, and save costs Effect
Active Publication Date: 2018-07-24
东风特汽(十堰)专用车有限公司
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Problems solved by technology
When the vehicle is in a dangerous situation, if the ESP system executes according to the instructions calculated by ESP's own logic, the vehicle will naturally not be in danger. However, once the motor continues to brake the wheels at this time, it is equivalent to insufficient torque reduction and increased When the torque is increased, the torque is too large, which will cause certain dangers to the operation of the vehicle
Method used
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Embodiment 1
[0055] The downhill assist system of embodiment 1 is as image 3 As shown, it includes a signal input module, a downhill assist system control module integrated in the vehicle controller, and an actuator. The actuator includes an electronic stability control system, a decoupling module, and a motor;
[0056] The main function of the signal input module is as follows: Calculate the road slope according to the collected signal. Among them, the downhill assist control system (HDC) switch operating system is used to open the downhill assist function; the slope information and the gear position signal are used as the judgment conditions for the function enablement of the downhill assist system; the vehicle speed, acceleration, accelerator opening and braking The pedal opening is used to calculate the road gradient; the battery management system module sends out the remaining battery power (SOC) information, which is used to calculate the regenerative braking torque Tmotor of the mo...
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The invention discloses a downhill control system and method for an electric vehicle. The downhill control system includes a signal input module, a slope module, a downhill auxiliary module, a stability auxiliary module and a decoupling module; the first output end of the signal input module is connected to the first input end of the downhill auxiliary module, and the second The output end is connected to the input end of the stability auxiliary module, the third output end is connected to the input end of the slope module, the output end of the slope module is connected to the second input end of the downhill auxiliary module, and the output end of the downhill auxiliary module The input end of the decoupling module is connected, and the interactive end of the stabilizing auxiliary module is connected to the interactive end of the decoupling module. The invention realizes active braking through the decoupling module, thereby improving the safety and stability of the vehicle.
Description
technical field [0001] The invention belongs to the field of electric vehicle control, and more specifically relates to a downhill control system and method for an electric vehicle. Background technique [0002] Traditional cars use engine braking and mechanical active braking systems or electronic stability control systems (ESP) to achieve downhill slow down functions, and set the upper limit of vehicle speed through the system so that the driver can control the vehicle calmly. However, because the expected vehicle speed set by the traditional vehicle is a fixed value, that is, the fixed value is the fixed value on slopes with different gradients, it lacks adaptability. [0003] In an electric vehicle, the slope is usually detected by the slope sensor and the inertial measurement unit. Once the downhill assist system (HDC) is turned on, the main brake of the motor and the mechanical active brake system are used to assist the braking, which can realize both the downhill assi...
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IPC IPC(8): B60L15/20
CPCB60L15/2018Y02T10/72
Inventor 祝东鑫李世斌毛涛杨情超汪刚李昌泉
Owner 东风特汽(十堰)专用车有限公司