The average speed of the car on the highway is around 100km/h. The traffic regulations stipulate that the minimum speed must not be less than 60km/h, and the maximum speed must not exceed 120km/h. If it is higher than 120km/h, it is not allowed to drive on the highways in China. Those who have learned driving licenses should understand this. The speed at which the car travels on the highway is relatively fast. So when the speed exceeds 100km/h, what functions on the car will fail?
The automotive computer is also developed and designed according to the human mind, and all its functions are consistent with human thoughts. Scientists will certainly consider follow-up use when studying a certain function. To make the simplest metaphor, when your car speed is 100km/h, do you dare to pull the handbrake directly? The answer is definitely not. Pulling the handbrake directly may overturn the car.
1, the steering wheel sensitivity will decrease
When the car is at a standstill or the car speed is low, a steering gear ratio is set between the steering wheel and the wheel; when the car is running at a high speed, a larger steering gear ratio is set, thereby increasing the car steering Stability and safety.
BMW named the variable steering ratio "active steering system" and used an electronic variable steering ratio system. Its core is a planetary gear set integrated in the steering column. An electric motor in the assembly is based on the current speed of the vehicle. , Proportionally adjust the front steering angle.
At low speeds, such as in city traffic, when parking, or when driving on winding mountain roads, the active steering system increases the steering angle. The front wheel responds to the slight rotation of the steering wheel immediately, ensuring that the driver can pass through a compact space without having to turn the steering wheel multiple times, parking is simpler and flexibility is enhanced.
2. Electronic hand brake switch will fail
The electronic handbrake button is abbreviated as “EPB†in English and may not be understood by pros who have not started a car. What happens when your co-pilot sits in a white car that has never driven a car and accidentally bumps into an EPB switch?
Don't worry, the EPB switch has no effect at this time. The EPB is connected to the parking brake computer. When the parking brake computer senses the vehicle speed exceeds 100km/h, it will automatically shut down. Pressing this button will not happen at this time. Any response.
Now the EPB on many cars will play such a role. When the speed is higher than 20km/h, when you keep pressing the EPB switch, the vehicle will slowly enter the four-wheel braking state. When the EPB switch is released, the vehicle will be released. Dynamic state. The EPB switch and the car brake at this time are a role.
3, TPMS will fail
The general tire pressure monitoring system TPMS is divided into a receiver display and four tire pressure sensors that are built into the tires and are responsible for monitoring. The metal part inside the sensor will generate a huge magnetic field during high-speed rotation around the axle. The higher the vehicle speed is, the larger the magnetic field will be. It will directly interfere with the signal from the sensor to the receiver, causing the receiver to receive no signal, and the data will be lost. In the center console of the vehicle, the distance from the front wheel is relatively short and the distance from the rear wheel is relatively long, so the sensors of the rear wheel first fail during the high-speed driving.
The manufacturer has tested the sensor emission data and lost it when the vehicle speed is “100 km/hâ€.
Therefore, the technical requirements of automotive sensors are very high. For some domestic automobile and tire pressure monitoring systems with good sensors, the tire pressure monitoring data will begin to disappear when the vehicle speed reaches 80 yards or more. If the vehicle speed is above 120 yards, the tire pressure monitoring system Absolutely not.
The GE NPX3 chip used by the UK-based SCHRADER sensor has a very good tire pressure monitoring system and can still receive data when the vehicle speed exceeds 185km/h.
German-made Mercedes-Benz and BMW original tire pressure monitoring systems come with very good monitoring results. When the vehicle speed reaches 180 yards, it can also accurately monitor the tire pressure and send out data. It has a strong magnetic field anti-interference ability.
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