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. 11, 2007
Filed:
Jul. 26, 2005
David Gerard Genise, Marshall, MI (US);
Suzanne M. Zampaloni, Marshall, MI (US);
Andrew P. Harman, Battle Creek, MI (US);
Michael A. Zampaloni, Marshall, MI (US);
Farhang Pourboghrat, Okemos, MI (US);
David Gerard Genise, Marshall, MI (US);
Suzanne M. Zampaloni, Marshall, MI (US);
Andrew P. Harman, Battle Creek, MI (US);
Michael A. Zampaloni, Marshall, MI (US);
Farhang Pourboghrat, Okemos, MI (US);
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A cylinder head () for an internal combustion engine has hydroformed port liners () positioned within selected ports, either exhaust and/or intake ports (). The hydroformed port liner () includes an air gap () for an insulation layer within the selected port () between an outer surface () of the hydroformed port liner () and the wall of the port (). A cylinder head () with a predetermined port configuration has selected ports () cast with protrusions (). The selected ports () have a larger diameter than a standard size port diameter for that cylinder head to provide a predetermined port configuration by a preset amount based on the thickness of the hydroformed port liner () and a desired air gap (). Protrusions () in the wall of the selected ports () or on the insert sleeves () facilitate formation of the air gap during the hydroforming process.