Enhanced Valve Operation for Four-Stroke Engines

SKF launched a Rocker Arm Bearing Unit that has been developed to enhance the operation of valve mechanisms in four-stroke engines. This technology will allow considerable fuel savings to be realised, along with significant reductions in both friction and operating temperatures, the company claims. It has been introduced to meet increasing market demands and to satisfy end users who are looking for more innovative, fuel-efficient engines.

Designed for use in two- and three-wheeled vehicle applications, where the trend is to move from two-stroke to four-stroke engines, the unit can also be used to increase the efficiency of four-stroke engines in other sectors, including agriculture, shipping and trucks. The pre-assembled Rocker Arm Bearing Unit produces significantly lower levels of friction than conventional rocker arm designs, helping to extend engine life and reduce service cost - according to the company.

The design of the unit draws on SKF's expertise in bearing, seal and lubrication technologies. This has resulted in a radial clearance, outer ring crowning profile and engineered surface pattern design that is said to achieve accurate valve timing and quieter operation. SKF's engineers will work closely with designers at specific manufacturers to retrofit rocker arms of existing designs with an SKF Rocker Arm Bearing Unit or to modify the unit to match new application specification.

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