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:
Jan. 19, 1993
Filed:
Mar. 12, 1992
Burnell L Bender, Woodburn, IN (US);
Navistar International Transportation Corp., Chicago, IL (US);
Abstract
An engine diagnostic testing procedure requires that the fuel shut-off solenoid valve remain connected to the engine's electronic control module during diagnostic testing. A normally closed set of contacts of a relay is interposed in the wiring between the module and the valve. This relay is part of an automatic shut-down circuit that uses several principal components of a known shut-down system along with two additional relays and three diodes to provide the engine with an automatic shut-down system that is independent of the engine's electronic control module, yet that will not disconnect the fuel shut-off solenoid valve from the electronic control module during diagnostic engine testing.