A tire gauge , or tire pressure gauge , is a pressure gauge used to measure tire pressure on the vehicle.
Since the tire is rated for a certain load at a certain pressure, it is important to keep the tire pressure at an optimal amount. Tires are rated for their optimum pressure when cool, meaning before tires have been pushed for the day and allowed to heat up, which ultimately changes the tire's internal pressure due to gas expansion. The precision of a typical mechanical meter as shown is Ã, Â ± 3Ã, psi (21 kPa). A higher precision meter with uncertainty Ã, Â ± 1 psi (6.9 kPa) can also be obtained.
Video Tire-pressure gauge
Sensor tekanan ban built-in
Many modern cars are now equipped with internal tire pressure sensors that allow the four tire pressures to be read simultaneously from inside the car. In 2005, most Tire Pressure Monitoring Systems (TPMS) used indirect pressure monitoring . The anti-lock brake sensor detects one tire spinning faster than the other and shows a low tire pressure to the driver. The problem with this method is that if all tires lose the same pressure then nothing will appear against the other to indicate the problem.
Maps Tire-pressure gauge
Regulation on tire pressure
Since September 2007, all under 10,000 pounds (4,500 kg) of new cars sold in the United States are required to incorporate a Tire Pressure Monitoring System, which is capable of monitoring all four tires and simultaneously reporting inflation below 25 percent of cold placard pressure in all combination all four tires. TPMS is known as TPMS Direct capable TREAD Act Act requiring simultaneous measurement of pressure for any tire pressure.
Early TPMS sensors require batteries, but the latest TPMS technology eliminates all sensor batteries.
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Source of the article : Wikipedia
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