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. 29, 1992
Filed:
Feb. 06, 1991
Thomas D Loewe, Wonder Lake, IL (US);
David M Oles, Hanover Park, IL (US);
Sun Electric Corporation, Crystal Lake, IL (US);
Abstract
An interface for coupling an engine analyzer to an engine having a distributorless ignition system includes a pair of pickup clamps for coupling signals from respective groups of spark plug wires. A logic cell array is supplied with spark plug secondary voltage polarity and pattern information, corresponding to an engine under test from a ROM. The technician is instructed as to which wires to place in each clamp. A semiconductor input switch is controlled by the logic cell array to sort the secondary voltages from the pickup clamps according to polarity. The real and the wasted sparks are then determined based upon the magnitude of the signals from the input switch. The apparatus permits a 'rapid test' (of secondary voltages only) by developing a pseudo #1 primary clock from the pickup clamp signals. A CPU in the interface is controllable by an external computer or by an operator keypad. A vehicle 'personality' module interfaces the logic cell array with the voltage levels on a connector of a corresponding vehicle.