Double-Sided Timing Belt Ensures Greater Comfort

The new double-sided timing belt for powering balance shafts is lighter and quieter than spur gears or chains.

Double-Sided Timing Belt The double-sided timing belt by ContiTech for driving balance shafts can also run in oil environments.
Photo: ContiTech

The ContiTech Power Transmission Group has developed a new double-sided timing belt for powering balance shafts. The teeth on the rear side of the belt, which can run in oil environments, transmit the reverse rotation direction of the crank shaft to the balance shaft.

Balance shafts ensure quieter running and increase ride comfort, especially in modern three- and four-cylinder engines. The new double-sided timing belt by ContiTech opens up more possibilities for engine designers at automotive manufacturers in terms of layout design: The spacing between the drive shaft and crank shaft can be significantly larger with the belt than with spur gears. Because the belt generates less friction than a chain, it simultaneously reduces CO2 emissions. Other benefits: In comparison with spur gears, the belt saves weight and thus supports the manufacturer's efforts to reduce fuel consumption. In contrast to chains, it also ensures enhanced ride comfort because it runs more quietly. As a further development of the timing belt in oil, the double-sided timing belt can run like a chain in the oil bath.

For the production of the double-sided timing belt, ContiTech developed its own manufacturing process and special tools with which the profile can be applied as precisely as possible to the rear side of the belt. The belt is suitable for all drives with counter-rotation and can withstand temperatures from -40°C to +150°C. It is hard-wearing and designed for the service life of the engine.