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Active pre-braking method for blade electric vehicle

A pure electric vehicle, pre-braking technology, applied in the direction of brakes, automatic starting devices, etc., can solve the problems of increasing the cost of the whole vehicle, staying in innovative technology, etc., to achieve the effect of improving safety, reducing the probability of occurrence, and controlling manufacturing costs

Inactive Publication Date: 2015-09-23
BEIJING ELECTRIC VEHICLE
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  • Abstract
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Problems solved by technology

However, due to the introduction of components including infrared detectors, active braking systems, and control chips, this type of device has significantly increased the cost of the entire vehicle, so it is often equipped on luxury models, and its competition is more in the Levels of innovation and technology

Method used

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  • Active pre-braking method for blade electric vehicle

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] The active pre-braking method of the present invention is mainly applied to the scene where the vehicle is at low speed, the distance between the vehicle and the vehicle in front (or the obstacle in front) is continuously shortened, and the driver does not take a braking operation. The strategy of active pre-braking, especially when the driver is distracted or a novice is on the road, can avoid the collision between the vehicle and the vehicle in front (or the obstacle in front) to a certain extent.

[0024] The main principle of the pre-braking control method is to use the active braking characteristics of the drive motor. Under low-speed conditions, the drive motor has the characteristics of being able to provide a large enough braking torque, which just meets the braking requirements in the actual situation....

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Abstract

The invention provides an active pre-braking method for a blade electric vehicle. The active pre-braking method for the blade electric vehicle includes the steps that firstly, a vehicle control unit receives the distance S between the vehicle and an approaching object in front of the vehicle, wherein the distance S is sent by a distance measuring device; when the distance S between the vehicle and the approaching object in front of the vehicle is smaller than a preset distance limiting value Sd, the relative speed VX of the vehicle and the approaching object in front of the vehicle is worked out according to the sampling time delta t and the distance [[delta]]S between the vehicle and the approaching object in front of the vehicle within the sampling time; and brake torque T provided by a driving motor is further worked out according to S and VX, so that active pre-braking is realized before the vehicle and the approaching object in front of the vehicle collide. The active pre-braking method is particularly suitable for the situations when the vehicle speed or the relative speed is low or when a driver is distracted or is supposed to step on a brake pedal. Pre-braking is conducted by controlling the vehicle actively, the vehicle is effectively prevented from colliding with the approaching object in front of the vehicle, and safety of the vehicle is improved.

Description

technical field [0001] The invention relates to the field of active safety control of automobiles, in particular to an active pre-braking method for pure electric automobiles. Background technique [0002] Traffic accidents not only cause casualties, but also bring economic losses. According to statistics, in various types of vehicle traffic accidents, the head and neck of the human body are the most common injury sites, and this is particularly common in rear-end collisions of automobiles. In rear-end collisions, the proportion of neck injuries is as high as 77.1%, and most rear-end collisions occur at low speeds (less than 25km / h). Therefore, how to reduce or even prevent the occurrence of low-speed rear-end collisions and reduce the rate of rear-end collisions is an important research direction for improving traffic safety. [0003] The current car generally can continuously monitor the state of the vehicle in front through the infrared detection system in the car, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T7/12
CPCB60T7/22B60T2201/022
Inventor 柯南极朱波何志忠田宇黎
Owner BEIJING ELECTRIC VEHICLE
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