MOTEUR A COMBUSTION INTERNE A PISTONS COMPORTANT UN SYSTEME D'AMELIORATION PAR RESONANCE DE L'ALIMENTATION EN GAZ FRAIS

MOTEUR A COMBUSTION INTERNE A PISTONS COMPORTANT UN SYSTEME D'AMELIORATION PAR RESONANCE DE L'ALIMENTATION EN GAZ FRAIS, QUI COMPORTE AU MOINS UN RECIPIENT-RESONATEUR RELIE AUX ORIFICES D'ASPIRATION D'UN GROUPE DE CYLINDRES DETERMINES DU MOTEUR.LE TUBE DE RESONANCE 33, 34 EST POURVU, AU MOINS A PROXIMITE DE SON EXTREMITE 35, 36 PLACEE A COTE DU RECIPIENT-RESONATEUR 31, 32, D'UN TRONCON 45, 46 DONT LA SECTION S'ELARGIT EN DIRECTION DU RECIPIENT-RESONATEUR 31, 32.APPLICATION A LA SURALIMENTATION PAR RESONANCE DES MOTEURS THERMIQUES. A resonance system associated with at least one group of engine cylinders (1 to 3 and 4 to 6) whose suction strokes do not significantly overlap includes a resonator vessel (31, 32) communicating with intake openings (13 to 15 and 16 to 18) of the cylinders in the or each group. A resonance tube (33, 34) communicates at one end (35, 36) with the associated resonator vessel (31, 32) and has a portion having a cross-sectional area increasing towards the resonator vessel (31, 32). The cross-sectional area (35a, 36a) taken at the tube end (35, 36) is at least 1.2 times greater than that at the minimum cross-section of the resonance tube (33, 34). The distance between the tube end joining the resonator vessel (31, 32) and an oppositely located inner wall face (49, 50) of the resonator vessel (31, 32) is greater than the diameter of a circle the area of which equals the tube end cross-sectional area (35a, 36a). Further dimensional relationships are specified.