Conduit system for introducing intake gases in internal combustion engines

Claim 1

In an internal combustion engine including engine cylinders with respective pistons reciprocating therein; an intake gas conduit system for supplying each engine cylinder with intake gas through an intake opening thereof; maximum four engine cylinders whose suction cycles are in a substantially non-overlapping relationship with one another forming a cylinder group; the improvement wherein said intake gas conduit system comprises in combination (a) a dampening vessel having an intake gas inlet opening; (b) a first oscillating system in which intake gas oscillations are generated by the effect of periodic suction cycles of the cylinders forming the cylinder group; said first oscillating system having a natural frequency and consisting of (1) a feed resonator vessel communicating with the intake opening of each cylinder of said cylinder group; (2) a feed resonance tube having first and second ends; said feed resonance tube communicating, with said first end thereof, with said dampening vessel and further communicating, with said second end thereof, with said feed resonator vessel; and (c) a second oscillating system in which intake gas oscillations are generated by the oscillations taking place in said first oscillating system; said second oscillating system having a natural frequency being at least approximately identical to the natural frequency of said first oscillating system; said second oscillating system consisting of (1) a closed resonator vessel; and (2) an equalizing resonance tube having first and second ends; said equalizing resonance tube communicating, with said first end thereof, with said dampening vessel and further communicating, with said second end thereof, with said closed resonator vessel; said first end of said feed resonance tube and said first end of said equalizing resonance tube being spaced from, and being oriented towards, one another across said dampening vessel.