Abstract
It is well known that a series of equipments, such as the depollution ones (the catalyst case, the EGR system, the particle filter, etc), besides their positive effects, they also lead to the increase of the exhaust gases backpressure. This affects the engine cycle processes in general, and implicitly the top dynamic performances. The paper presents the theoretical and experimental results about the effect that the exhaust gases backpressure has on the pumping chart and on the top dynamic performances: Pmax and Mmax – regarding a gas engine, with a 1600 cm3 swept volume and four valve cylinder.
Keywords: backpressure, consumption, pumping chart, dynamic performances