VarioCam tagged posts

You probably do not know what does “engine valve technology” mean if you are not a car enthusiast. However, you may have already heard of terms like “VVT-i” (on Toyota cars), “VTEC” (for Honda), “VANOS” and “Valvetronic” (for BMW), “VarioCam” (Porsche). These are how each auto maker name its engine valve technology. In this article I would try to discuss some interesting stuffs about this topic.

The internal combustion engine in a modern automobile is a 4-stroke engine, and it has intake and exhaust valves. It is easy to imagine that the optimal timing of the open/close of the valves, should not be fixed under all workloads...