Welcome to Mechadyne: The Variable Valve Actuation Specialists

Mechadyne researches and develops advanced valvetrain systems for internal combustion engines.
Our proven cost-effective technologies use Variable Valve Actuation (VVA) to produce greener, more efficient engines. Click here for more company information

Our Products

PICTURE: A variable lift and duration - VLD - upper rocker, a twin-output cam phaser, and an assembled single cam phaser - SCP - camshaft

  • Concentric cams
  • Cam phasers
  • Variable lift
VVA Products

Engine R & D

  • Innovation
  • 3D CAD
  • Cam design
  • Valvetrain design
  • Prototype test
Learn more

Upgrade Path

PICTURE: Shows the upgrade path with a standard finger follower system going to adjacent lobe phasing using an SCP camshaft and then to VLD - our variable lift system.

  • 3 VVA Spec's
  • Modular systems
  • One head design
Upgrade info

Reference

  • Our Papers
  • VVA Links
  • Clean Diesels
  • Green engines
  • VVA discussion
VVA Reference

Our Business

Mechadyne is a technology licensing company, selling licences to automotive manufacturers to use our patented systems. Business info

Market

Our VVA systems have a potential market of $1.5 billion a year. Market info

Emissions

VVA is key to meeting future emissions legislation.
Our green technologies reduce emissions and improve fuel economy. Emissions info

V-DYNE:

What is V-DYNE and what is its relationship to Mechadyne? V-DYNE info

What is VVA and Why Do You Need it ?

All internal combustion engines use valves to control the flow of gasses into and out of the combustion chamber.  The precise timing, duration and extent to which these valves open significantly affects all aspects of engine performance - from power and torque to fuel economy and emissions.

With fixed valve events, it is impossible to optimise an engine's performance over the complete range of operating conditions without some degree of compromise.   Variable Valve Actuation removes this constraint by allowing us to change the valve event to give optimum performance whenever it is required.

Mechadyne's News Section:

Winding Road Magazine Feature Article

August 2007

Karl Ludvigsen has produced an article on the history and future of variable valve timing for Winding Road Magazine.  Pages 110-111 of this article give a full and accurate account of the events that have lead up to the Dodge Viper engine going into production with our concentric camshaft technology. Read the article here

Engine Technology International Valvetrain Feature Article

May 2007

Mechadynes VVA technologies are presented in this edition's Valvetrain feature. Both our concentric camshaft technology and our variable lift and duration system are discussed with reference to a graduated upgrade path for future-proofing engine product lines. Read the article here

Automotive Engineer Cam-less vs Mechanical Valvetrain Feature

April 2007

Jeff Daniels from Automotive engineer discusses the relative merits of cam-less and mechanical variable valvetrains with a detailed background from Mechadyne.

Dodge Viper Engine In Production With Our Concentric Camshaft

Jan 2007

The 2008 Dodge Viper is the first production cam in block engine with VVT to use our concentric camshaft technology. More on the new Dodge Viper here


Dr Tim Lancefield Presents Our Variable Lift System at IFP

November 2006

Tim Lancefield presented a paper at IFP showing physical hardware that uses our upgrade path. Click here to read this paper