A new kind of diesel engine has been developed, promising some of the most far-reaching efficiency gains since the diesel engine was invented over a century ago. Jeff England, CEO of McLean, England & Associates LLC of Little Rock, Arkansas states: “We believe the spherical rotary valve combustion engine will be the ‘bridge’ technology that will take this country and the rest of the world from the inherently inefficient tappet valve engines we drive today to the hydrogen combustion and fuel cell engines of the future.” McLean, England & Associates LLC owns the exclusive license for the Coates Spherical Rotary Valve Technology for North America. George Coates, President of Coates International Ltd, the inventor, started this diesel engine in February 2003. This is the first time since Rudolf Diesel invented the diesel engine over 110 years ago that a piston diesel engine has run without the assistance of a cam-driven tappet valve train.
The Coates Spherical Rotary Valve (CSRV) engine has only two moving parts in its head compared to over 100 moving parts in a conventional tappet valve head. Their head can be retrofitted to any existing engine block. Preliminary tests indicate an increase in fuel efficiency, higher horsepower, and lower emissions with less service and maintenance requirements because the head operates lubrication free. “This eliminates the need to change engine oil because it’s not contaminated by the combustion process,” states Mr England.
