A carburetion system, without complicated control systems, functions
uniformly throughout the range of engine load and incremental increases of
power demand to provide efficient stable engine performance for a natural
gas fired, internal combustion engine using EGR. A cogeneration system for
supplying distributed generation of electricity and process/utility heat,
employs a system for engine cooling and effective heat transfer to a
cogeneration client, reduces engine head temperature, thereby reducing
fuel consumption and reducing pollutants, as well as delivering
substantially increased heat to a cogeneration process/utility heat
facility by use of a carburetion system which employs at least a pair of
spaced apart venturi positioned in series proximate one to another such
that a first exhaust recycled gas venturi is upstream of a fuel venturi
where fuel and air/exhaust gas are admixed prior to the resultant gas
being introduced into a turbocharger. The distance between the exhaust
venturi and fuel venturi is affective to provide a given amount of exhaust
gas to air ratio prior to entering the fuel venturi inlet. Unexpectedly
the spatial relationship between the two venturi, one to the other,
affectively regulates exhaust gas air mixture, as well as the
air/fuel/exhaust gas mixture to the engine by means solely of pressure
increase and decrease (vacuum) of the engine intake system.
