| http://www.w3.org/ns/prov#value | - The control of the recirculation of exhaust gases (EGR) is performed in three regions, i.e. region I, IV, and V, on the basis of the map as indicated in FIG. 9 by controlling the first EGR valve 67 and the second EGR valve 73 in a fashion as will be described hereinafter.
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