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:
Nov. 17, 1981
Filed:
Jul. 06, 1979
Gyula Cser, Budapest, HU;
Autoipari Kutato Intezet, Budapest, HU;
Abstract
A multi-space intake gas conduit system for a multi-cylinder internal combustion piston engine has at least two separate resonator vessels each associated with a separate cylinder group formed of predetermined cylinders of the engine. Each resonator vessel is coupled to intake openings of the cylinders forming the cylinder group associated with the respective resonator vessel. To each resonator vessel there is coupled a resonance tube and there is further provided a damper vessel interconnecting the resonance tubes. The resonator vessels and resonance tubes associated with separate cylinder groups form separate acoustic oscillating systems tuned to substantially the same natural frequencies. The resonance tubes coupled to different resonator vessels are of different lengths; the length of the shortest resonance tube is at least 0.6 times the length of the longest resonance tube and the diameter of a circle having an area identical to the cross-sectional area of the shortest resonance tube is at least 0.8 times the diameter of a circle having an area identical to the cross-sectional area of the longest resonance tube. Further, the volume of the resonator vessel coupled to the shortest resonance tube is at the most 1.7 times the volume of the resonator vessel coupled to the longest resonance tube.