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:
Feb. 07, 1989
Filed:
Dec. 22, 1986
Applicant:
Inventors:
Robert J Nowakowski, Indianapolis, IN (US);
Van V Riesberg, Jr, Anderson, IN (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
320 48 ; 320 37 ; 320 39 ;
Abstract
An apparatus for and method of indicating when the battery in a motor vehicle is discharging is disclosed in which the battery voltage during vehicle operation is monitored and compared to a stored value representing the open-circuit voltage of the battery measured prior to the vehicle engine being cranked for starting. An indication that the battery is discharging is provided only after a discharging condition, i.e., the battery voltage is less than the stored value, is detected at each of a predetermined member of consecutive timed intervals.