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:
Apr. 28, 1992
Filed:
Apr. 30, 1991
Applicant:
Inventors:
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
123 / ;
Abstract
This invention relates to an engine suction apparatus in which a tuning frequency of pressure-vibration characteristics of a suction path on the upstream side of a throttle body coincides with a frequency of a pressure vibration applied from a suction port to the suction path at an idling engine speed. The suction apparatus includes an idling path, branching from the suction path on the upstream side of the throttle body, for supplying intake air in an idling state, and a resonance silencer which resonates at the tuning frequency to reduce noise is connected to the idling path.