Implementation of the Freevalve system leads to a much more compact total engine package because many of the parts used in a traditional camshaft-based engine are no longer necessary. With Freevalve, manufacturers are able to do away with expensive parts such as the throttle body, camshaft, cam drive, timing gear and cover, wastegate, pre-catalytic converter systems and direct injection systems.
On a typical vertically positioned engine, Freevalve will reduce build height and improve pedestrian impact safety. On boxer engines, the width of the engine will be reduced dramatically.
Our work with Qoros on their 1.6 litre turbocharged engine resulted in a reduction of 50mm in height and 70mm in depth.
Reduced weight and less valvetrain losses are also important benefits of the Freevalve system. Our Qoros engine is 20kg lighter after the change to Freevalve technology.
The figure below illustrates the difference in package size between a typical DOHC head, and a head utilizing the Freevalve System.