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:
Apr. 10, 1990
Filed:
Dec. 12, 1988
Donald L Cummins, Anderson, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An electronic control for an electric engine starter that includes a cranking motor and a solenoid for moving a pinion into mesh with an engine ring gear and for operating solenoid contacts. If end tooth abutment occurs between the pinion and ring gear to block meshing of the pinion with the ring gear the solenoid contacts do not close and this is sensed by an electronic circuit connected to the solenoid contacts and to a start switch. When pinion block occurs the electronic circuit develops a signal which causes the solenoid to be deenergized and to be maintained deenergized until the start switch is opened. The electronic circuit includes means for preventing solenoid contact chatter by locking out energization of the solenoid coil if the solenoid contacts open after being closed due to, for example, low voltage.