Suche
Mein Konto
TPMS - the opportunities & the risks
From November 2014, all new cars must be equipped with a tire pressure monitoring system (TPMS). This leaves no stone unturned for tire retailers. The automotive industry presents the essential facts.
TPMS - the opportunities & the risks
The average tire change will now take an average of 38.5 minutes. So two and a half times as long as before. This additional effort must be passed on to the end consumer. The tire retailer therefore finally has the opportunity to sell its services at a reasonable price with good arguments.
The facts in detail:
All M1 and N1 class vehicles type-approved for the first time from November 1, 2012 and subsequently from November 1, 2014 all M1 and N1 class registrations must be equipped with a tire pressure monitoring system (TPMS) or Tire Pressure Monitoring System (TPMS). The regulations apply to single tires on all axles. Not only summer tires, but also winter and all-season tires must be equipped with tire pressure sensors. Trailer tires are exempt from this regulation. Direct and indirect measuring systems are approved with equal status.
The systems:
1) Directly measuring: Pressure and temperature sensors are installed in each tire and transmit this data, as well as the tire position, at 433.92 MHz to a display within the driver's field of vision and hearing. Two types are currently offered: the spherical cap sensor block screwed onto the valve, also with a variable angle (currently over 130 different OE sensors on the market) or electronic modules, permanently glued to the inside of the tire. These modules are independent of the valve and cannot be damaged by assembly work. The latest generation of TPMS works battery-free using transponder technology. Universal sensors can replace up to 90% of all OE sensors, are programmable, either through a driving cycle, via the on-board computer, or using programming tools or pads and can be equipped with different valve versions. Stored sensors with batteries can be activated by pressurizing them (1 minute with a maximum of 4 bar).
2) Indirect measuring: This type of system uses the signals from the existing ABS and ESP system and the fact that tire rolling radii are reduced with lower tire inflation pressure. When there is a loss of pressure between two wheels on an axle, a difference in wheel speed occurs. If the difference value is fixed, the ABS control unit sends a corresponding warning signal to the driver, taking the physical ESP movement signals into account. Because of its complex electronic equipment, this type of measurement is reserved for standard installation by vehicle manufacturers. Tire temperature measurement is not possible with this type of system. When changing or servicing tires, simple, vehicle-specific activation processes are required, which can be found in the vehicle operating instructions.
3) Adhesive sensors inside the tire: These also transmit the measurement data to the TPMS, are easy to use and can significantly shorten tire changes.