The fuel is introduced into the cylinder after the exhaust is closed reducing un-burnt hydrocarbons lost to atmosphere .
And as the fuel no longer contains the lubricating oil emissions are further reduced
No overhead valves, keeping manufacturing and servicing costs to a minimum.
With an effectively designed valve surface and piston crown the fresh charge of air can be directed under the burnt gasses improving the scavenging phase of the cycle.
No magic materials or sci-fi methods are required to enable this engine to work. It uses the same methods and technology used by the engines in production at the moment and would not require enormous investment in to put into production.
The air being introduced into the cylinder is at a higher pressure so the port area can be reduced but because the valve is electronically controlled the port area open time can be increased so not losing any of the volume of air introduced.
As the valve closes the exhaust port this allows the cylinder to be "turbo charged" improving the volumetric efficiency and further increasing the performance.
Because there are no transfer passages this allows this area, formally taken up by these passages, to be utilized by the water jacket. This improves cooling and therefore is beneficial to the overall running of the engine.
No bulky expansion chamber required to assist gas transfer.
PATENT PUBLICATION NUMBER: DE60312351D DATE 19/04/07
