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:
May. 15, 1990
Filed:
Jul. 25, 1988
Applicant:
Inventors:
Barbara A Flowers, Canton, MI (US);
Richard A Marsh, Birmingham, MI (US);
John C Haraf, Livonia, MI (US);
Alfred D LePage, Plymouth, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D / ; G06F / ;
U.S. Cl.
CPC ...
36443105 ; 36443104 ; 123494 ; 123463 ; 123412 ; 731182 ;
Abstract
A method for determining barometric pressure uses a manifold pressure sensor for measuring the manifold absolute pressure. A pressure drop between the atomosphere and the intake manifold is determined by utilizing stored lookup tables based on measured values of throttle angle and engine speed. Barometric pressure is then determined by summing the manifold absolute pressure and the pressure drop.