Passenger-car rollover early-warning method based on tire pressure monitoring

Abstract

A passenger car rollover warning method based on tire pressure monitoring. First, the tire pressure P1 and P2 of the tires on both sides of the front axle of the car are collected in real time; a maximum absolute value ΔP of the tire pressure difference between the two sides is preset. max And the maximum rate of change of tire pressure F max ;Real-time monitoring and statistics of the tire pressure of the tires on both sides, and analyze the real-time absolute value of the pressure difference ΔP=|P1‑P2|, and the change rate F of the tire pressure of the tires on both sides 1 = dp / dt, F 2 =dp / dt; judgment ΔP≥ΔP max , F 1 ≥F max and F 2 ≥F max , when ΔP≥ΔP max or F 1 ≥F max or F 2 ≥F max Then it is determined that there is a danger of the vehicle body rolling, and at the same time a warning signal and an engine compulsory control signal are output.

Description

technical field [0001] The invention relates to the technical field of passenger car driving safety monitoring and early warning, in particular to a passenger car rollover early warning method based on tire pressure monitoring. Background technique [0002] The body height of some large passenger cars is very high at present, and the luggage compartment is also relatively large. Because the real-time center of gravity position of the passenger car varies with the volume and density of the luggage in the luggage compartment, the location of the luggage, the number of passengers, and the seating position of the passengers. When the luggage compartment is empty and the upper seats are full of passengers, the center of gravity of the vehicle will become very high; similarly, when the luggage is relatively concentrated on one side of the luggage compartment, the center of gravity of the vehicle will also become higher. Off to one side. At this time, a turning at too fast a spee...

AI Technical Summary

Problems solved by technology

At this time, a turn at too fast a speed may cause the vehicle to overturn

[0003] Most drivers perceive the risk of rollover tendency mainly through the speed of the car body and the degree of roll of the car body in real time, so as to realize the stable driving of the car body, but this is very unreliable, because the car speed is fast, And the turn is also in progress, once the driver loses control and perceives a mistake, the consequences will be disastrous

Many current passenger cars use air springs with variable stiffness design, and the actual roll angle of the body that can be perceived is relatively small, which makes the driver's subjective perception ability unreliable

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