The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 04, 1990
Filed:
Oct. 04, 1989
Gyula Cser, Budapest, HU;
Autoipari Kutato es Fejleszto Vallalat, Budapest, HU;
Abstract
An internal combustion engine includes an engine cylinder having a suction opening; a piston arranged in the engine cylinder for reciprocating motion therein; a fresh-gas conduit system for supplying the cylinder with fresh gas; and a resonance system forming part of the fresh-gas conduit system. The resonance system includes a resonance vessel having a resonance vessel outflow opening communicating with the suction opening of the engine cylinder and a plurality of resonance pipes each having one end provided with a pipe inflow opening for fresh gas and an opposite end provided with a pipe outflow opening for fresh gas merging into the resonance vessel. The resonance system further has a closing element having an open and a closed position for allowing and, respectively, preventing flow of fresh gas through one of the resonance pipes to connect the last-named resonance pipe to and, respectively, disconnect it from the resonance system for changing a resonance frequency of the resonance system.