TPMS-Tire Pressure Monitoring System (car tire pressure real-time monitoring system), which is what we often call tire pressure monitoring. Its function is to automatically monitor the tire pressure in real time when the car is driving, and give an alarm for tire leaks and low air pressure to ensure driving safety. It is an early warning system for the life safety of drivers and passengers.
According to the requirements of the "Performance Requirements and Test Methods for Passenger Car Tire Pressure Monitoring System", from January 1, 2020, the mandatory TPMS installation regulations will be implemented. All vehicles produced in my country must be installed with direct or indirect TPMS systems.
What is the difference between indirect and direct TPMS?
indirect
The wheel speed sensor of the automobile ABS system is used to compare the speed difference between the tires to achieve the purpose of monitoring the tire pressure. When the tire pressure decreases, the weight of the vehicle will make the tire diameter smaller, which will cause the speed of the vehicle to change. This change can be used to trigger the alarm system to alert the driver that there is a problem with the tire pressure of the vehicle in the form of a fault light. Belongs to passive afterwards.
Obviously, this passive tire pressure monitoring is not intuitive and the cost is relatively low.
direct
Using the pressure sensor installed in each tire to directly measure the tire pressure, using a wireless transmitter to send the pressure information from the inside of the tire to the system on the central receiver module, and then display the tire pressure data. When the tire pressure is too low or leaks, the system will automatically alarm. Belongs to the active defense type beforehand.
Direct tire pressure monitoring through wireless signal transmission has the advantages of stability, reliability, and accurate data. It can measure the actual instantaneous pressure inside each tire at any time and display it in the meter. Of course, compared to indirect tire pressure monitoring, the cost is higher.
What are the advantages of TPMS?
1. Tire pressure monitoring system is a kind of active safety equipment, it can alert the driver in time when the tire has dangerous signs, remind the driver to take corresponding measures, thus avoiding the occurrence of serious accidents
2. Effectively avoid tire damage caused by running flat. Data shows that when the tire pressure is insufficient, when the wheel pressure drops by 10% from the normal value, the tire life will be reduced by 15%.
3. Effectively avoid the increase of fuel consumption. When the air pressure in the tire is too low, it will increase the contact area between the tire and the ground, thereby increasing the friction resistance. When the tire pressure is lower than 30% of the standard pressure value, fuel consumption will increase by 10%
4. Avoid abnormal wear and tear of vehicle components, and driving under high tire pressure will cause great damage to the suspension system
In summary, it can be seen that TPMS as an active safety device is still very helpful to the driving safety and economy of vehicles. The country has issued a mandatory standard to use TPMS as the standard configuration of vehicles, which is definitely good information for consumers. , I must like it, and I hope that more and more car safety devices will be installed on the car as standard equipment.
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