Questions and Answers

How does Freevalve’s System compare to camshafts concerning valvetrain energy consumption?

During normal driving, the Freevalve System typically consumes 10% less energy than a conventional valvetrain arrangement.

How does the Freevalve system’s cost compare to a variable valve system?

Initially, the Freevalve system will be more expensive, but with increased manufacturing volumes, there will be the potential to match the cost of conventional valvetrain systems.

For Gasoline engines, the cost increase will be less than the cost diffenece to e Deisel engine, while providing Diesel-like fuel consumption. A spark ignited FreeValve will have lower cost for catalysts than normal spark-ignited engines since a pre-cat can be eliminated. The cost of aftertreatment system compared to a Diesel engine more than compensates for the increased cost of the FreeValve system.

How does the Freevalve system’s cost compare to technology offering similar fuel consumption and Co2 reductions?

A spark-ignited engine with the Freevalve System will cost less than a diesel engine while having equal performance, similar fuel consumption, as well as Co2 consumption. The Freevalve equipped engine will have substantially lower cost than electric hybrid offerings.

What level of control of the valves does the Freevalve system offer?

The Freevalve System offers full control of both valve timing and lift.

How does the system know the position of the valves?

The Freevalve System utilizes proprietary valve position sensors, which allow the controller to know the valve position to within 1/10 of a millimeter in real time.

What happens if one or more actuators fail?

If one or more actuators fail, the engine will continue to run as normal, but with slightly reduced high rpm power. The engine will be able to provide limp-home capability even if 75% of the actuators were to fail.

What happens if there is a catastrophic failure on a Freevalve equipped engine compared to a camshaft equipped engine?

If the complete system fails, the engine will simply stop running with no damage to the engine, as compared to a camshaft equipped engine which will be badly damaged or destroyed if a belt or chain breaks.

How durable are the actuators?

Freevalve actuators have a lifetime equal to that of a modern engine. Freevalve actuators have been tested in extreme conditions for hundreds of millions of cycles with no measurable wear.

How much noise does the system generate, and how does it compare to a camshaft equipped engine?

The noise produced by a Freevalve equipped engine is comparable to a normal engine at idle, and considerably less as engine speed increases. The following video compares the noise generated by a Freevalve equipped engine, and a similar camshaft equipped engine: