Temperature-compensated exhaust gas recirculation system

An exhaust gas recirculation (EGR) valve (12) of the type that is connected between an engine exhaust manifold (14) and an engine air intake manifold (16) and is electrically actuable to control exhaust gas flow from the exhaust manifold (14) to the air intake manifold (16), said EGR valve (12) characterized by:

• a first inductive coil (48) including a number of turns of an electrical conductor (52), whereby said first coil (48) produces a magnetic field when energized, said electrical conductor (52) having a positive temperature coefficient of resistance;
• a ferromagnetic armature (62) disposed adjacent said first coil (48), said ferromagnetic armature (62) being movable under the influence of the magnetic field to regulate the flow rate of the exhaust gas through said EGR valve (12);
• a resistive combination of circuit elements (76) connected in series with said first coil (48), said resistive combination of circuit elements (76) including a first resistive element (75) and a second resistive element (72) connected across said first resistive element (75), said first resistive element (75) having a temperature-dependent range of resistance values and a negative temperature coefficient of resistance and said second resistive element (72) having a resistance value,
• wherein said resistive combination of circuit elements (76) has a resistance that exhibits a preselected negative temperature characteristic whereby the variation in resistance seen across the series connection of said first coil (48) and said resistive combination (76) due to temperature changes is less than the variation in resistance of said first coil (48) alone due to the temperature changes.