The necessity of installing tire pressure monitoring sensors
According to statistics, an average of 1.3 million people die and 50 million people are injured due to traffic accidents in the world every year, among which the fatality rate of expressway accidents is extremely high. Nearly 70% of traffic accidents on expressway are caused by tire failure.
So what safety hazards will abnormal tires bring?
1. Tire puncture, the National Highway Traffic Safety Administration (NHTSA) issued a report that if the tire pressure is lower than the standard value by 25%, the probability of a tire blowout will increase by 3 times; if it is 25% higher than the standard value, the tire blowout probability will increase by 1 times.
2. Reduce the brake performance. When the tire pressure is too high, the tire pressure is relatively increased, the contact area with the ground is reduced, the friction force is reduced, and the braking distance is extended;
3. Suspension system destroyed. Too high a tire pressure results in insufficient space for vibrations to be absorbed, which affects the drive's stability, as well as increase the impact on the suspension system;
4. Shorten tire life, the tread of the tire will be excessively worn if the tire pressure is too high; if the pressure is too low, the tread will be excessively worn on both sides, which will lead to the tire being scrapped early;
5. Due to increased contact between the tread and the ground when the tire pressure is low, the tire is over-resisted and the fuel consumption increases accordingly.
What changes will Tire Pressure Monitoring Sensors bring to tires?
1. Prevent accidents. TPMS can detect tire pressure, remind the owner in time, and prevent traffic accidents caused by the tire effectively.
2. Fuel economy. Some surveys reported that if the tire pressure is 30% lower than the standard pressure value, the fuel consumption will increase by 10%. Tire pressure monitoring sensors monitor tire pressure to ensure tires are in the best condition for driving.
3. Extend tire life. When tire pressure drops by 10% from normal, tire life is reduced by 15%.
What types of tire pressure monitors are there? What's the difference?
1. According to the installation position of the sensor, it can be divided into built-in tire pressure monitoring and external tire pressure monitoring. The difference between internal and external sensors is: While the built-in type is more difficult to install and maintain since it requires removing the tire, its service life is longer and it will not be disturbed by external factors.
The external type is easier to install and maintain, and can be directly installed on the tire valve; the service life is shorter; the tire needs to be removed when inflating; the signal is easily disturbed by external factors such as dust, rain and snow.
2. Based on the measurement method, it can be divided into Pressure-Sensor Based TPMS (PSB) and Wheel-Speed Based TPMS (WSB). The difference between them is:
Pressure-Sensor Based TPMS (PSB) directly monitors the pressure sensor installed in the tire, and uses the wireless transmitter to send the pressure information from the inside of the tire to the system on the central receiver module, and accurately displays the air pressure value of the four tires, once an abnormality occurs, it will immediately prompt the tire failure and automatically alarm.
The benefit of a direct tire pressure monitoring system is that a pressure sensor and transmitter are installed on each wheel to alert the driver if any tire pressure falls 25% below the cold tire pressure recommended in the driver's manual. Its warning signal is relatively accurate, not affected by vibration, temperature, speed and other environments, and can measure the actual instantaneous pressure of each tire at any time.
Wheel-Speed Based TPMS (WSB) actually monitors the air pressure by calculating the tire speed. When the air pressure of a tire decreases, the weight of the vehicle will make the rolling radius of the wheel smaller, resulting in its speed being faster than other wheels. The speed difference of the four tires is compared through the speed sensor on the car ABS braking system. Can achieve the purpose of monitoring tire pressure. The in-vehicle computer is edited to create new functions, and the in-vehicle computer can warn the driver that one tire is under-inflated compared to the other three.
The benefits of indirect tire pressure monitoring system: the cost is lower than the direct one
Disadvantages of indirect tire pressure monitoring system: it is impossible to determine which tire is faulty, and when there is an abnormality in coaxial or two or more tires, the alarm cannot be given. WSB indirect tire pressure monitoring is prone to false alarms when the road conditions are poor and the vehicle is bumpy, and it fails when the speed exceeds 100km/h.
Checking tire pressure before driving is a great way to make sure your tires are safe, but most tire problems occur while driving in poor conditions, studs, etc. The tires can silently leak air, burying hidden safety risks and creating driving hazards.
Monitoring tire pressure becomes very important at this point. When drivers enjoy the driving experience, don't forget to install tire pressure monitoring sensors on your car to get "insurance" for your family’s safety and the happiness.