Mixed thermo-elastohydrodynamic cam–tappet power loss in low-speed emission cycles

@inproceedings{Chong2014MixedTC,
  title={Mixed thermo-elastohydrodynamic cam–tappet power loss in low-speed emission cycles},
  author={W.W.F. Chong and Mircea Teodorescu and H. Rahnejat},
  year={2014}
}
The key driving forces in engine development are fuel efficiency and emission levels. These aspects are particularly poignant under vehicle idling or low crawling motions in typical city driving. Under these conditions the parasitic frictional losses are exacerbated and the emission levels are especially high. A key engine sub-system is the valve train system. Although it accounts for only 2-3% of the overall engine losses, it is the highest loaded conjunction in the engine, thus limiting the… CONTINUE READING

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