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:
Jul. 06, 1993
Filed:
Feb. 07, 1992
Peter H Havstad, Plymouth, MI (US);
Rodney J Tabaczynski, Northville, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method of operating an automotive type internal combustion engine to improve the efficiency and power, fuel economy, and emission control is obtained by phase shifting of both the intake and exhaust valve timing schedules or events, coupled with the use of reed valves in each intake port to restrict the backflow of exhaust gases into the intake port, and essentially unthrottled operation except where necessary to maintain engine stability, the reed valves also providing for a controlled internal EGR system. The phase shifting and use of intake reed valves will optimize the intake and exhaust event timing at the four major engine operating conditions of idle speed, part load, and wide open throttle low speed and high speed operation.