TPMS tire pressure monitoring system
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1. Direct TPMS: The direct TPMS tire pressure monitoring system uses a pressure sensor installed in each tire to directly measure the air pressure of the tire, and uses a wireless transmitter to transmit pressure information from the inside of the tire to the central receiver module, and then The tire pressure data is displayed. When the tire pressure is too low or leaks, the system will automatically alarm. His pressure sensors are divided into built-in and external. The built-in tire pressure sensor is composed of a special valve and a sensor. When installing, replace the original valve, and then put on the sensor, it needs to be balanced; the external tire pressure sensor directly covers the four sensors on the valve. And lock the anti-theft scorpion, it is easy to install. The working principle is: when the car starts, the acceleration sensor first sends a signal to the receiver, and then the monitored tire pressure is transmitted to the receiver together with the temperature signal, and when the receiver receives the signal, it will immediately display it. . During the driving process, the sensor of the wireless tire pressure monitor monitors the data every 4 seconds. If there is no abnormality, in order to ensure power saving, the data is sent to the receiver every 20 seconds; when there is an abnormality, the receiver is sent every 4 seconds. One time data. Weilitong's independent display with vibration and sound detectors, with intelligent power-saving automatic switch function.
2. Indirect TPMS: The working principle of the indirect TPMS tire pressure monitoring system is: When the pressure of a tire is reduced, the weight of the vehicle will make the rolling radius of the wheel smaller, resulting in faster rotation than other wheels. By comparing the difference in rotational speed between the tires, the purpose of monitoring the tire pressure is achieved. The indirect TPMS tire pressure monitoring system actually relies on calculating the tire rolling radius to monitor the air pressure.
3. TPMS direct and indirect system comparison
The direct system provides a more advanced function to determine the actual instantaneous pressure inside each tire at any time, making it easy to identify the faulty tire. Indirect systems are relatively inexpensive to manufacture, and vehicles that have been equipped with four rounds of ABS (one wheel speed sensor per tire) only need to upgrade the software. However, the indirect system has no direct system accuracy, it is impossible to determine the faulty tire at all, and the system calibration is extremely complicated, and in some cases the system will not work properly, for example, when the two tire pressures of the same axle are low.
Is the TPMS tire pressure monitoring system necessary?
For new friends, we may just have heard of the TPMS tire pressure monitoring system.
I don't know his role. At this time, it is easy to be misled by some old drivers. We must know him objectively according to my own situation and understand him. Due to the lack of experience, the normal state of perception during driving is poor. When the tire is rolled, the tire pressure is too high, too low, the temperature is too high, etc., our novice can not judge, the hidden consequences, the light tire wheel scrapped, the heavy Causing a traffic accident.
So we have to solve the TPMS tire pressure monitoring system [required reasons]:
1. When the tire is rolled, the quick leak or slow leak will alarm in time, so that we can stop the spare tire in time and look for the tires in the nearby tire shop. Prevent crushing the tires.
2. When the tire is loose and other reasons lead to unbalanced friction, causing the tire to be hot, when it reaches 70 °C, it will alarm us and take measures to prevent the tire from bursting.
3. When we have not refilled for a long time and the tire pressure is lower than the limit set by us, it will alarm to prevent the low temperature from causing the tire to rise. The lack of gas exercise will also reduce the service life of the tires. The tire pressure is less than 30% of the standard pressure value, and the tire life will be reduced by 45%. According to each tire, the weight can be reduced by 450 yuan per tire, and 4 tires are 1800. yuan. In addition, the lack of gas exercise will also accelerate the aging of the suspension system of the car.
4, tire pressure monitoring system can also save fuel: standard tire pressure can reduce vehicle fuel consumption, tire pressure is insufficient, fuel consumption rises, experimental data shows that tire pressure is lower than the standard pressure value of 30%, fuel consumption will increase by 10%, assuming every 100 kilometers 10 liters of oil, 7 yuan per liter of oil, then spend 7 yuan per 100 kilometers, exercise 80,000 kilometers is 5600 yuan.
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