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TPMS CASTING A WIDE NET
| 题名： | TPMS CASTING A WIDE NET |
| 正文语种： | eng |
| 作者： | RANDON STECKLER |
| 作者单位： | Motor Age Magazine |
| 摘要： | When discussing the subject of tire pressure monitoring systems, (TPMS) it's something many technicians (or shops for that matter) don't typically put too much thought into. They treat it as one of those necessary evils that just come with the territory of running a service and repair business. It's not typically thought of as being profitable as much as it is a task that just must be dealt with when, say, replacing tires. The truth of the matter is being adequately prepared to deal with TPMS systems can truly be a profitable venture.We likely know that TPMS came to be popular around 2007, when the TREAD Act (which was introduced in 2000 to address issues of severe tire failures from inadequate tire pressure) required TPMS to be installed on all new model vehicles under 10,000lbs GVW. Now that they are no longer an option, these systems must now be faced head-on by techs and shop owners.Early systems (known as "indirect TPMS") capitalized on the antilock brake system (ABS) to calculate tire pressure. The pressure in the tires was simply inferred (not measured). As a tire loses pressure, the outer circumference of the tire lessens as well. As a result, a complete rotation of that tire occurs over less of a distance, meaning the tire will rotate faster than one that is pressurized appropriately. A system like this can be found on some vehicles dating back to the 1980s! The wheel speed sensors of the ABS system will report this data to the ABS control module. That same data is used (by comparing the pressures of tires diagonally from one another) to trigger the TPMS warning indicator if a threshold is exceeded. |
| 出版年： | 2022 |
| 期刊名称： | Motor age |
| 卷： | 141 |
| 期： | 2 |
| 页码： | 38-42 |
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