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:
Nov. 07, 1989
Filed:
Aug. 26, 1988
Jay L Hanson, Bloomington, MN (US);
Leland L Howland, Belle Plaine, MN (US);
Thermo King Corporation, Minneapolis, MN (US);
Abstract
Electrical control apparatus for automatically starting a Diesel engine. The apparatus includes start, preheat and run relays which respectively control the energization of a starting solenoid, glow plugs, and a fuel solenoid. The energization of the start, preheat and run relays is controlled by a control module which drives the preheat relay as soon as the control module is energized. The glow plug preheat time is measured, and the run and start relays are respectively energized just prior to, and at the termination of the preheat time. Engine cranking time and speed are monitored, dropping the start and preheat relays when the engine starts, and also when the engine speed fails to reach certain thresholds within first and second predetermined periods of time. The run relay continues to energize an electrical circuit which includes an engine reset switch and a low oil pressure switch. The engine reset switch de-energizes the control module, and thus the run relay, in the event the engine fails to start.