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. 31, 2002
Filed:
Sep. 10, 2001
Frederick Allan Page, Canton, MI (US);
Thomas Francis Mausolf, Livonia, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A control system and method for preventing exhaust gases from entering an intake manifold of an engine after engine shutdown is provided. The engine includes a valve controlling air flow into the intake manifold . The method includes determining when the engine has been shutdown. The method further includes opening the valve for a predetermined amount of time after the engine shutdown to allow air at ambient atmospheric pressure to communicate with the intake manifold . Thus, a relatively high air pressure in an intake manifold prevents exhaust gases from migrating into the intake manifold which reduces a subsequent engine crank period.