A differential gear mechanism and improved axle shaft retention arrangement for the axle shaft. The inductor can include a conductive line including at least one turn and an opening positioned within an interior of a region of the conductive line. The matrix containing the particles is contained in a housing, and the particles range in diameter from about 1 \u03bcm to about 200 \u03bcm. The outlet ends of the first and second pumps are fluidly connected to the inlet ends of the first and second heat exchangers, respectively. Should an engine speed difference be greater than a threshold value, then an incompletely closed exhaust gas recycling valve is recognized, assuming a complete closure of the throttle valve. The carrying handle is extendible; and retractable, and in the retraction mode is essentially within the general perimeter space of the case.