Vehicle braking auxiliary device based on aerodynamics

Abstract

The invention provides a vehicle braking auxiliary device based on aerodynamics. The vehicle braking auxiliary device based on aerodynamics comprises an ECU (electronic control unit), at least two link mechanisms, a fixed shaft, a front spoiler, a rear spoiler, at least two step motors, at least three hydraulic cylinders, a vehicular speed sensor, a turning angle sensor, at least two position sensors and at least three pressure sensors. The vehicular speed sensor, the turning angle sensor, the position sensors and the pressure sensors are all connected with an input end of the ECU, each step motor and each hydraulic cylinder are connected with an output end of the ECU, one end of each link mechanism is correspondingly connected with an output shaft of one of the step motors while the other end of each link mechanism is in transmission connection with the rear side of the front spoiler, the front spoiler is capable of rotating around the fixed shaft which is arranged on the front side of the front spoiler, and a piston rod of each hydraulic cylinder is connected with the rear spoiler. The vehicle braking auxiliary device based on aerodynamics is capable of instantly reducing vehicular speed to some extent and increasing ground adhesion of a vehicle to enable the vehicle to keep stable in high-speed emergency braking, braking distance can be shortened, and safety is improved.

Description

【Technical field】 [0001] The invention relates to the field of vehicle electronic control, more specifically, relates to a vehicle braking auxiliary device. 【Background technique】 [0002] In aerodynamics, there is a theory proved by French physicist Bernouyi: the speed of air flow is inversely proportional to the pressure. That is, the faster the air velocity, the lower the pressure; the slower the air velocity, the greater the pressure. For example, the wing of an airplane is a positive parabola on the top, and the airflow is fast; the bottom is smooth, and the airflow is slow, forming a downward pressure on the wing that is greater than an upward pressure, resulting in lift. [0003] The car will encounter air resistance during driving, which can be divided into three forces: longitudinal, lateral and vertical, and the air resistance is proportional to the square of the vehicle speed, so the faster the vehicle speed, the greater the air resistance . Generally speaking,...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an aerodynamics-based vehicle brake assist device. When braking at high speed, the powerful airflow acts on the front and rear spoilers, and a direction is generated on the two spoilers. The downward and backward resistance makes the vehicle drop at a certain speed instantly, increases the adhesion of the vehicle to the ground, and solves the problems of long distance, long time and poor stability when the vehicle is braked in the prior art

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