Multivalve engines, particularly from Japan and Western Europe, have taken the auto world by storm in the last few years. Marketing experts working on behalf of the Japanese in the U.S. have done a ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

The hunt for efficient engine valve technology can be a never-ending journey into cam timing, various combustion cycles, and lift and duration adjustments. For that reason, some companies believe ...