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, 1984
Filed:
Mar. 12, 1982
Daniel J Dooley, Burr Ridge, IL (US);
Warren L Williamson, Mesa, AZ (US);
Creative Tool Company, Burr Ridge, IL (US);
Abstract
An engine timing instrument as disclosed which is particularly designed for use with diesel engines and which responds to the actual time of firing within a cylinder. A strobe may be flashed at the crankshaft angle at which firing occurs and the crankshaft of the strobe flash may be advanced with respect to the firing angle until the strobe flash occurs at a top dead center position. The angle of advance of the strobe flash is measured to then indicate the angle of firing relative to the top dead center position. Important features relates to the use of a piezoelectric transducer placed in a glow plug hole to measure pressure, the transducer being connected to circuitry which provides both a firing pulse and a reference pulse. The reference pulse occurs close to and not later than the top dead center position and is used to measure the time of a subsequent firing pulse. Electronic circuitry is provided for counting and storing clock pulses and performing digital operations in a manner such as to obtain a high degree of accuracy.