Patent ID: 7812467
Filing Date: 2010-10-12
Classification: H02J,H02P,Y02T

Abstract:
1. In an internal combustion engine having an output shaft driving the rotor of an alternator to generate electrical energy at an alternator output for use by said engine, said alternator causing a load on said engine which may reduce engine speed or even stall said engine, said engine also having a control module monitoring designated engine operational parameters such as engine speed and load and controlling designated variables such as fuel, air, spark, to control operation of said engine, the improvement comprising a smart alternator control circuit responsive to said control module and limiting alternator load on said engine at a given load-induced engine speed-reduction condition and preventing stalling of said engine, and wherein said engine has a battery, and said smart alternator control circuit limits alternator load on said engine by limiting electrical output of said alternator to in turn limit the load imposed by said rotor on said output shaft of said engine, and wherein the difference between the limited electrical output of said alternator and said high electrical demand is supplied by said battery until said control module determines that said engine has sufficient extra available horsepower to charge said battery from said alternator, whereupon said smart alternator control circuit permits said alternator to generate extra electrical output, above said limited electrical output, to charge said battery.