Just general interest:
A new engine has been launched, the Mayflower e3 Variable Motion engine, which is claimed to halve emissions and reduce petrol consumption by up to 40 per cent. The engine is the brainchild of Dr Joe Ehrlich, who has spent a lifetime pioneering technology aimed at improving engine performance.
A pivoted lever arm is introduced between the con-rod and crankshaft. This gives an 'elliptical' path to the con-rod big end, changing piston motion, causing it to slow momentarily, immediately after ignition. This allows the flame front to spread faster. It also provides a longer intake and expansion stroke and ensures the piston and con-rod are positioned to provide positive torque.