轮胎压力监测系统如何工作

如果您的灯光熄灭，最好尽快检查轮胎压力。

斯托克德斯/盖蒂图像

直接轮胎压力监测系统在每个轮胎中使用单个传感器，有时是全尺寸备用, to transmit information to a central control module. The sensors read internal pressure, and sometimes temperature. The information received at the module is analyzed, and any issues with any of the tires are sent to the car's vehicle information system, or low-pressure light.

Information is most often sent wirelessly as a radio signal. While some aftermarket systems are mounted outside the tire, most manufacturers use a sensor mounted inside the tire. This is where the expense for the consumer comes in. Each sensor has a battery with a life of about a decade. On most, the battery is not serviceable, and the entire sensor must be changed. The sensor stem is also subject to damage, as is the sensor itself, when the tire hits a curb or the car gets into an accident. And each time a sensor is changed, it generally has to be reprogrammed into the control module so it can be recognized.

无线系统也容易受到问题和挑战，并与其他可能随着时间的流逝失败或损坏的汽车系统集成。此组合还包括每个制造商使用的通常专有技术，使商店和消费者的传感器范围令人困惑。

间接轮胎压力监测系统don't rely on sensors to do the work, or at least not pressure sensors. The systems rely on wheel speed sensor data to interpret the size of a tire based on how fast it rotates -- a small tire would rotate faster than a larger tire, and an underinflated tire is smaller than one with proper inflation. All of this data can be gleaned by electronic monitors within in the car, and then interpreted using advanced programming and processing.

This system is less prone to the vagaries of direct sensors, but more attention must be paid to it. For instance, imagine that a driver fills up his tires with air at a gas station and checks the pressure before heading out on a long trip. An indirect system needs to be reset every time the tires are inflated, or it will see the newly inflated tires as a possible hazard. In this case, if it isn't reset, the system will see bigger tires and may warn the driver of over inflation.

有关安全和监管系统的更多信息，请参见下一页上的链接。

最初出版：2012年6月22日