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. 25, 2003
Filed:
Apr. 25, 2002
Andreas M. Lippert, Rochester Hills, MI (US);
Alexandros C. Alkidas, Troy, MI (US);
Ko-Jen Wu, Troy, MI (US);
William Robert Matthes, Troy, MI (US);
Jennifer L. Liedtke, Rochester, MI (US);
David L. Reuss, Huntington Woods, MI (US);
Alan William Hayman, Romeo, MI (US);
Gerald J. Schimelfening, Sterling Heights, MI (US);
Gerald A. Silvas, Marysville, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A combustion chamber for a swirl flow two valve spark ignition direct injection engine includes a cylinder with a closed end having a wedge shaped combustion chamber recess. A fuel injector extends through the closed end near a shallow side of the wedge recess. A spark plug extends through the closed end at a deeper part of the wedge recess opposite from the injector. A single pair of laterally spaced intake and exhaust valves control intake and exhaust ports opening into the wedge recess. A piston in the cylinder has an outer diameter and includes a head end having a raised pedestal with a shallow upwardly angled face ending at a raised ridge and enclosing a shallow bowl in the head end. The bowl is generally oval with a major dimension generally aligned with a cylinder centerline through the valves.