Vehicle three-stage speed limiting control system and method

Abstract

The invention belongs to the field of vehicle speed limiting control, and discloses a vehicle three-stage speed limiting control system. The vehicle three-stage speed limiting control system comprisesa request signal generation part, a speed limiting value acquisition module, a speed limiting part, a vehicle speed sensor, an electronic throttle and an electronic control unit, wherein the requestsignal generation part is provided with a function button and used for selecting the entry and exit of a speed limiting function mode; the speed limiting function mode comprises a manual speed limiting mode and a positioning speed limiting mode; the speed limiting part receives control instructions from the request signal generation part and is used for selecting and running the speed limiting function mode of the vehicle three-stage speed limiting control system; the speed limiting value acquisition module is used for acquiring a real-time speed limiting value; the vehicle speed sensor is used for generating a vehicle speed signal and acquiring a real-time vehicle speed value; the electronic throttle is provided with a position sensor for generating a position signal to control power output of a target vehicle; and the position signal corresponds to a pressing angle of the electronic throttle and is used for determining the next operation of a driver.

Description

technical field [0001] The invention relates to the field of automobile safety driving control, in particular to a vehicle three-level speed limit control system and control method. Background technique [0002] At present, vehicle cruise generally adopts two modes: cruise system and adaptive cruise, hereinafter collectively referred to as cruise system, both of which enable the cruise function by turning on and off the control switch, so that the vehicle can maintain the cruise function in a speed range, and release it through one operation step The cruise system function, when the function is enabled, limits the peak speed of the vehicle, and also limits the lower limit of the vehicle speed. The value of the cruise system is mainly reflected in the ideal road conditions. Through the cruise system function, it is not It is necessary to control the speed of the vehicle in real time, so that the vehicle can travel within the set speed range, reducing the risk of artificial co...

AI Technical Summary

Problems solved by technology

[0003] It is not suitable for use on relatively congested road sections, which is determined by the characteristics of the cruise system. Among the ways to release the cruise system of the vehicle, the most basic and commonly used method is to release the cruise system by controlling the braking device to generate a signal to release the cruise system. Frequent operation of the cruise system in a short distance interval will not only fail to reduce the inevitable deceleration and acceleration actions, but will cause excessive repeated operations to induce traffic accidents

[0004] When driving on roads with complex road conditions, such as local protrusions or depressions on the road ahead, the current speed may cause vehicle failure. Adjusting the driving speed is inevitable during driving, especially on roads with complex road conditions, and some cases are equipped with distance calculation The matching system with the speed control mechanism solves the problem of safety and speed control in the case of following the car to a certain extent. Based on the different methods adopted, it may occur that the recognition camera is blocked by foreign objects, the road surface is partially deformed, and the special properties of the objects blocking the road surface are caused. The recognition accuracy is not enough for the system to make a theoretical response, and the high-precision camera and ranging radar technology is still in the research and development stage. Action combinations are still fundamentally inseparable from human judgment and operation

[0005] The design logic of the cruise system is to send a signal to the control unit through the switch, and the control unit then controls the power source to maintain a relatively stable output torque for the vehicle speed. From the design logic, once the cruise system is activated, the vehicle speed is controlled by the control unit. Limited, if at this time the communication signal generation switch→communication signal transmission wire→signal receiving and processing part→communication information execution part fails, then the driving speed of the vehicle will not be controlled in the normal way, so the driving speed of the vehicle is limited The design logic of the vehicle is a safety hazard for the driving of the vehicle

[0006] Hidden dangers in the operation steps are the most precious time at the moment when traffic accidents are foreseen. Since the release mechanism of the cruise system requires steps, it takes time to complete. There are three main ways to release the cruise system. "1" passed Turn off the control signal to release the cruise system. This method usually needs to be manually exited. The driver needs to take his eyes off the road and find the control switch immediately before the accident. The system receives the command to exit the cruise system. It is very dangerous to decelerate at the first time, and cannot meet the needs of emergency situations; "2" releases the system by stepping on the electronic accelerator control. In terms of driving habits, usually the driver's first reaction is to avoid or slow down. Based on the setting of the system, stepping on the electronic accelerator can certainly cancel the cruise system, but this is not in line with the driving instinct of ordinary drivers, so it is prone to misoperation, resulting in dangerous consequences; "3" by stepping on the brake Pedal complete release system, which is also the most common release method, but not all emergency failures can be stepped on the brake components, such as front tire blowout and sudden failure of guide components, the correct way is to stabilize At the same time, stop the acceleration action in the direction, so that the vehicle will gradually decelerate under the action of driving resistance, and finally reduce the vehicle speed through the braking system. If the above fault occurs when the system is turned on, the operation requirements for the driver will be much higher than the normal level. It is very dangerous. There is no identical accident scene in the world. For most drivers, it is difficult to tell from experience, but the actual situation is that reasonable operations must be made to release the system. If the brake is released, it is necessary to Master the strength, excessive braking will increase the difficulty of vehicle control, and even directly cause the vehicle to lose control. Turning off the communication switch or stepping on the electronic accelerator will miss a short precious time, so the use of the cruise system has potential safety hazards

Images