Resonator conduit system for introducing intake gases in internal combustion engines

Claim 1

In a multi-space intake gas conduit system for introducing intake gases by resonance charging into a multi-cylinder internal combustion piston engine, including at least two separate resonator vessels each associated with a separate cylinder group formed of predetermined cylinders of the engine; each resonator vessel being coupled to intake openings of the cylinders forming the cylinder group associated with the respective resonator vessel; at least one resonance tube coupled to each resonator vessel; and at least one damper vessel interconnecting the resonance tubes; the resonator vessels and resonance tubes associated with separate cylinder groups forming separate acoustic oscillating system tuned to substantially the same natural frequencies for charging the cylinders; the improvement wherein the resonance tubes coupled to different resonator vessels form, according to their length, at least two significantly unlike dimensional groups; further wherein the nominal length of the shortest resonance tube is at least 0.6 times the nominal length of the longest resonance tube and the nominal diameter of a circle having an area identical to the cross-sectional area of said shortest resonance tube is smaller than, but at least 0.8 times, the nominal diameter of a circle having an area identical to the cross-sectional area of said longest resonance tube; and further wherein the nominal volume of the resonator vessel coupled to said shortest resonance tube is at the most 1.7 times the nominal volume of the resonator vessel coupled to said longest resonance tube, whereby the amplitude and the kinetic energy of oscillations of said separate acoustic oscillating systems are at least approximately equal and the oscillating masses of said separate acoustic oscillating systems are different for obtaining uniformity in the charging of each cylinder with intake air.