Method for reducing noxious components in exhaust gases and engine for use therewith.

摘要

The method essentially consists in returning a greater or lesser proportion of the burnt gases back into the cylinders during the fresh gas induction phase. This is achieved by equipping each cylinder (1) with a bypass duct (7) connected to it by way of an auxiliary induction valve (8), the opening period of which straddles the top dead centre, and to the induction pipe (6). A throttle or throttle chamber (9) allows the rate of flow of burnt gas recycled on induction to be controlled as a function of the operating conditions of the engine. In this way both a reduction in the noxious subtances and an improvement in the power output of the engine are achieved. …Application mainly to four-stroke spark ignition engines. ……