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DSM in Automotive

Proven noise reduction in Engine Balancing Systems with Stanyl

Noise emanating from engine balance systems is an increasingly important issue for automobile engine developers. Gears made from Stanyl® make less noise than steel gears, and the polymer also provides exceptional durability and outstanding overall performance.

Balance-shaft-gear

Extreme heat resistance under the hood

Parts inside vehicle engines are subjected to extremely high temperature levels, as well as aging caused by the combination of heat and oil.  Stanyl meets these challenges with:

  • a melting point of 295°C
  • best-in-class endurance
  • fatigue resistance at temperatures above 100°C
  • ability to work well in both dry and lubricated conditions (due to its extremely low wear rates)

Replacing metal in balance shaft gears: lower weight, noise, & emissions

Together with some industry partners, DSM has been investigating the feasibility of replacing metal balance shaft gears with Stanyl gears. They developed two meshing helical gears for a twin-shaft mass-balance system. These gears drive the weighted balance shafts that counteract high-speed second-order engine vibrations. The outcome?

  • The gears were still running after 111 million load cycles at 12 Nm and 12,000 rpm in 110°C engine oil, surpassing the durability needs for the maximum torque.
  • Stanyl has a specific mass that is five to eight times less than that of steel for the given gears, so a complete gear set for a mass-balance module in Stanyl can weigh over 40% less than the steel version.
  • The lower weight of the gears has a direct impact on reducing noise from the engine.
  • The reduction in weight, together with the resulting lower mass moment of inertia of both gears, also makes possible a reduction in CO2 emissions of 0.06g/km for a medium-sized vehicle. 

The right grade for you

See which type of Stanyl meets your material needs in our product database