Beare Head Engine

The term "Six Stroke" was coined by the inventor of the Beare Head, Malcolm Beare. The technology combines a four stroke engine bottom end with an opposed piston in the head working at half the cyclical rate of the bottom piston. The head piston works in a ported cylinder closely resembling that of a two stroke, thus 4+2= Six Stroke. The opposing piston acts in unison with auxiliary low pressure reed and rotary valves, allowing variable compression and a range of tuning options. The engine demonstrably increases both torque and power output, achieves better fuel economy and cleaner burning with reduced emissions, and has longer service intervals and considerably reduced tooling costs when compared with a conventional OHC four-stroke design.

Due to the radical hybridisation of two- and four-stroke technology, the device achieves increased torque and power output, better fuel economy and cleaner burning with reduced emissions, longer service intervals, and considerably reduced tooling costs when compared with a conventional OHC four-stroke design.

Exaggerated claims? Marketing hype? Judge for yourself - we will attempt to give almost complete documentation on-site combined with downloads of various supporting spreadsheets, graphics and animations which in concert will give an excellent overview of the concept. For the knowledgeable mechanic or engineer, it should soon become obvious that our claims are worth further investigation. 

Unlike most other development companies presenting a new invention, ours is not calling for investors, we are not looking for shareholders, were not interested in government grants, and intend to continue our research and development until this extraordinary ICE breakthrough has been optimized to production ready status. We welcome expressions of interest from engine manufacturers and are happy to speak with you about the implementation in the future of this technology.

Beare Technology

The piston is half way up on the exhaust stroke. When the piston reaches TDC with the ports fully open, the disk will begin to cut off the exhaust. The valve runs clockwise.

Looking down on top of the head the scotch yoke and upper portion of the piston are visible, with the crank webs beneath. When the small hole in the centre lines up with the oil hole in the centre of the sliding block, the engine is at TDC.

Upper Crank	Upper Crank with Piston	Piston
Cylinder head upper view	Cylinder head from below	Disc valve front

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