SKF has developed a new generation of automatic timing belt tensioner units for engine applications with significant improvements including ease of installation and enhanced belt life compared to existing tensioner technology. The new tensioners are expected to reach production in 2006.
A timing belt tensioner applies force to the engine timing belt that maintains synchronisation between the crankshaft and camshaft. The SKF smart tensioner automatically self-adjusts to provide consistent belt tension while the integrated one-way clutch protects against 'tooth jump' in the event of engine kickback. This ensures proper engine timing and function.
SKF's new innovation, the smart automatic belt tensioner unit (S-ABTU), features a single long-arm eccentric tensioner enabling easy and accurate installation that provides precise belt tension control throughout the operating range of the engine and the service life of the belt.
"SKF has produced belt tensioner units for over 30 years and the S-ABTU is further proof of SKF's commitment to innovative solutions that provide system improvements to our customers," says Alexander de Vries, vice president, Product and Systems Development, SKF Automotive Division. "This revolutionary tensioner concept, with its excellent dynamic performance and simple installation process, contributes significantly towards achieving system service life equivalent to the life of the engine."
Installation
The S-ABTU is first bolted into position and then begins operation as soon as a pin is pulled out. The tensioner automatically self adjusts to the correct position providing optimal, immediate and consistent belt tension. This simple, failsafe installation procedure is independent of engine temperature and provides the same advantages whether on the assembly line or in the service garage. Improved belt tracking: As a leader in bearings, SKF brings extensive knowledge in bearing design and manufacturing and has applied it to the development of the S-ABTU.
This has resulted in an innovative tensioner with tight perpendicularity tolerances that minimise belt angularity issues to reduce noise and vibration, and reduce belt side loads, which are detrimental to belt life. (The picture shows the SKF X-Tracker for a Cadillac STS-V.)
About SKF
Founded in Sweden in 1907, SKF has its headquarters in Gothenburg, Sweden, with technology centres in the Netherlands, France, Germany, Italy, Japan and the United States. SKF enjoys a long history of innovation, including the development of the first integrated wheel hub bearing in 1938 (1938 Citroën 15 CV), and the first fully by-wire controlled concept car, the Filo, jointly launched with Stile Bertone in February of 2001.
For the automotive market, SKF manufactures bearings, seals, drive-by-wire systems, and value-added subassemblies for corners and steering, driveline and engine systems for both cars and trucks. The company also offers by-wire SMART actuators and sensors, plus a variety of design, testing and consulting services.
SKF provides bearings, sealing and lubrication systems for non-automotive markets as well, including railways, linear motion and precision technologies and couplings, electric motors, household appliances, the industrial aftermarket, aerospace and steel industries. It employs approximately 40 000 worldwide, has annual sales of over six billion dollars, and sells its products in more than 140 countries.
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| www: | www.skf.co.za |
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