Current regulator for an electromagnetic load utilized in conjunction with an internal combustion engine

A current regulator for an electromagnetic load used in conjunction with an internal combustion engine and connected in series with a precision resistor having two access terminals at respective ends thereof, the current regulator comprising:

• first voltage means for providing a first desired voltage which is freely selectable;
• a first regulator for comparing the actual voltage at one of said access terminals to said first voltage and providing an output indicative of said comparison;
• a first current controller for receiving said first regulator output and being connected to one end of the series circuit made up of said electromagnetic load and said precision resistor;
• second voltage means for providing a second desired voltage which is freely selectable;
• a second regulator for comparing the actual voltage at the other one of said access terminals to said second voltage and providing an output indicative of said last-mentioned comparison;
• a second current controller for receiving said second regulator output and being connected to the other end of said series circuit;
• a third current controller also connected to said other end of said series circuit;
• and,
• a fourth current controller also connected to said one end of said series circuit;
• and,
• said current controllers being connected one to the other to conjointly define a bridge circuit with said series circuit being connected across said bridge, whereby current flows through said series circuit in a first direction when said first desired voltage is greater than said second desired voltage and in a second direction therethrough when said second desired voltage is greater than said first desired voltage.