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:
Aug. 07, 1990
Filed:
Jun. 02, 1989
Jordan R Lee, Sterling Heights, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An engine induction system for providing air to the cylinders of an engine. The induction system includes a primary plenum and a primary runner leading therefrom to each cylinder. A primary inlet valve is generally adjacent the inlet to the primary plenum. Each of the primary runners is tuned to facilitate cylinder charging at a predetermined lower range of engine speeds. The induction system includes a secondary plenum and a secondary runner leading therefrom to each cylinder. Each of the secondary runners is tuned to facilitate cylinder charging at a predetermined higher range of engine speeds. The induction system includes valves which are operable to close at the predetermined lower range of engine speeds to obstruct air flow into the secondary plenum and the secondary runners, and to open at the predetermined higher range of engine speeds to allow air flow through the secondary plenum and the secondary runners.