Inlet air circuit, for internal combustion engine, consists of an air distributor, supplying air to the cylinders and an upstream element, which controls supply of air into primary and secondary supply pipes.

摘要

The inlet air circuit (12) consists of an air divider (22), which divides the air between the inlet openings of the combustion chambers (24). The divider is supplied with air through a primary and secondary inlet pipes (40, 42), which feed from the inlet system (44). The primary pipe (40) consists of a closing device (46), which is controlled between an open position and a closed position in order to modify the resonant frequency of the inlet circuit as a function of the excitation frequency of the engine (10).