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:
Mar. 03, 1992
Filed:
Apr. 15, 1991
Wallace E Beaber, Northville, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A dual-mode induction system for a multi-cylinder internal; combustion engine wherein an individual intake passage or runner communicates between a common air plenum and each engine cylinder. A separate bypass having an individual port at each engine cylinder extends from the plenum and each internal runner to provide a substantially shorter passage to each engine cylinder and a valve covers each bypass port and is operated in response to engine speed and/or related vehicle operating parameters to simultaneously close the bypasses at low engine speed to force intake air through the longer internal runners and provide a ram tube effect and to simultaneously open the bypasses at high engine speeds to force intake air through the shorter internal runners at a higher frequency and low resistance.