Patent ID: 8256214
Filing Date: 2012-09-04
Classification: F01N,F02D

Abstract:
1. An internal combustion engine comprising: a plurality of cylinders divided into a first group and into a second group; a control unit to deactivate all cylinders of the second group; a first intake conduit and a second intake conduit, which are connected respectively to the cylinders of the first group and to the cylinders of the second group and are controlled respectively by a first throttle valve and by a second throttle valve; at least one first exhaust conduit and at least one second exhaust conduit, which are connected respectively to the cylinders of the first group and to the cylinders of the second group; an intersection at which the first exhaust conduit and the second exhaust conduit are reciprocally connected; at least one catalyzer, which is arranged along the first exhaust conduit upstream of the intersection and is provided with first sensors to detect the composition of exhaust gases at the first catalyzer itself; and at least one second catalyzer, which is arranged downstream of the intersection and is provided with second sensors to detect the composition of exhaust gases a the second catalyzer itself; wherein the intersection between the first exhaust conduit and the second exhaust conduit comprises an intersection conduit, which is regulated by an intersection valve.