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:
Oct. 18, 1994
Filed:
Jan. 03, 1994
Lawrence A Zurek, Harrison Township, Macomb County, MI (US);
Lorna J Clowater, Canton, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A housing structure for reducing back air flow to the mass air flow sensor of an internal combustion engine. The housing structure consists of a housing defining a main air flow passage therethrough. A bypass passage is provided in the housing parallel to a longitudinal axis of the main air flow passage which receives therein the sensing head of the mass air flow sensor. A recovery chamber is connected to the bypass passage and is enclosed by an internal structure. The internal structure forms a pair of venturies with the sidewalls of the housing which induces an air flow through the bypass passage and the recovery chamber. A calibrated aperture is provided through the internal structure connecting the recovery chamber to the main air flow passage downstream of the bypass passage. The calibrated aperture reduces the air flow through the bypass passage during a back air flow.