- Where We Work
- Who We Are
- Info & Tools
Freescale Semiconductor introduced the FXTH87 tire pressure monitoring system (TPMS) family—the smallest integrated package TPMS solution available at an extremely light weight of 0.3 grams. The FXTH87 family is 50% smaller than competing products, helping designers reduce overall bill of materials costs.
Freescale’s newest TPMS system-in-package solution provides low power consumption combined with a high level of functional integration in one package, featuring a dual-axis accelerometer architecture; pressure and temperature sensor; integrated MCU; RF transmitter and low frequency receiver.
The National Highway Traffic Safety Administration estimates that 23,000 accidents and 535 vehicle fatalities occur each year involving flat tires or blowouts, which TPMS systems help prevent by ensuring proper tire inflation monitoring. In addition, properly inflated tires improve fuel economy and reduce emissions, resulting in many regions worldwide, including the United States, European Union, China, Japan and Taiwan, to begin requiring TPMS in new vehicles. According to IHS iSuppli, TPMS will represent more than 25% of the total pressure measurement market for automotive sensors by 2015.
In TPMS, size and weight are critical, because the system is installed on the car’s tire. We are offering a one-of-a-kind solution that can help improve the safety and efficiency of virtually every car on the road.—Babak Taheri, vice president and general manager for Freescale’s sensors solutions division
Enclosed in a 7 x 7 x 2.2 mm package, the FXTH87 family provides the smallest footprint available, enabling form factors for tire pressure sensor module developers to reduce the weight and overall bill of materials costs. The industry’s lowest RF power consumption at 7 mA ldd significantly extends battery life.
Both the single- and dual-axis accelerometer options improve accuracy and facilitate more precise tire localization implementation and universal interoperability for original equipment manufacturers and aftermarket applications. The integrated MCU and dedicated firmware offer the largest customer flash memory at 8 KB, increasing application flexibility and reducing time to market.
The FXTH87 TPMS family is available now for a suggested resale price starting at US$3.45 to $3.62 in 10,000-piece quantities.
XL Hybrids, Inc. announced that fleet customers of its XL3 Hybrid Electric Drive System retrofit system have logged a cumulative total of four million on-road miles.
Customers are driving their service, delivery and cargo fleets more than 500,000 miles per month, a number that is increasing monthly. XL Hybrids said it would provide more detail during the Southeast Alternative Fuels Conference, 23 October.
Our customers enjoy a quick adoption rate because the XL3 system doesn’t need any special plugs, charging or fueling infrastructure. Fleet managers can retrofit existing fleet vehicles or order new vans with our charge-sustaining hybrid electric powertrains. Fleets immediately benefit from cost savings of 20 percent reduction in fuel consumption.—Clay Siegert, co-founder and vice president of supply chain for XL Hybrids
The XL3 Hybrid Electric Drive for passenger and cargo vans requires less than a $10,000 investment. The simple, fail-safe system provides fleets with 99.9 percent uptime due to the post-transmission, parallel design, the company said.
At the DTM season finale, an autonomous Audi RS 7 piloted driving concept completed a lap on the Grand Prix track in Hockenheim at racing speed—without a driver. It took the Audi RS 7 piloted driving concept just slightly over two minutes to complete a lap on the track, piloted with high precision and accuracy to within centimeters. The five-door coupe is largely identical to the production model, but its electromechanical power steering, the brakes, the throttle valve and the eight-speed tiptronic are controlled automatically.
There are two primary technological considerations during piloted driving at such speeds: precise orientation of the vehicle on the road and absolute control of the vehicle at the handling limits.
For orientation on the track, the autonomous RS 7 uses specially corrected GPS signals for orientation on the track. Accurate down to a centimeter, these differential GPS data are transmitted to the vehicle via WLAN according to the automotive standard and redundantly via high-frequency radio. Parallel to this, 3D camera images are compared in real time against graphical information stored on board. The system searches in each of the countless individual images for several hundred known features, such as building patterns behind the track, which it then uses as additional positioning information.
Control of the vehicle at the handling limits is another feature of the Audi RS 7 piloted driving concept car. Comprehensive on-board networking coupled with the highly precise control of all actors relevant to driving enable the technology platform to drive at the physical limits. The Audi engineers intensively investigated piloted driving at the handling limits, putting the technology platform through several thousand test kilometers on a variety of routes.
The Audi RS 7 piloted driving concept car drove a clean racing line at the Hockenheimring—full throttle on the straights, full braking before the corners, precise turn-in and perfectly metered acceleration when exiting the corners. Forces of over 1.3 g occur during braking, and lateral acceleration in the corners can reach 1.1 g. Tests on the track in Hockenheim suggested an expected top speed of 240 km/h (149.1 mph) and a lap time of 2 minutes and 10 seconds.
The top performance by the Audi RS 7 today substantiates the skills of our development team with regard to piloted driving at Audi. The derivations from series production, particularly in terms of precision and performance, are of great value for our further development steps.—Prof. Dr. Ulrich Hackenberg, Board Member for Technical Development at AUDI AG
On the track. Click to enlarge.
Piloted driving is one of the most important development fields at Audi: The first successful developments were achieved ten years ago. The test results continually flow into series development.
These latest test runs are providing the Audi engineers with insights for the development of automatic avoidance functions in critical driving situations, for example.
Production Audi driver assistance systems include Audi side assist, Audi active lane assist, and adaptive cruise control with Stop&Go function including Audi pre sense front.
Experts from Volkswagen Group Research, the Electronics Research Laboratory (ERL) and Stanford University (both in California) are supporting Audi as partners in the further development of piloted systems.