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. 05, 1977
Filed:
Jun. 12, 1975
Nissan Motor Co., Ltd., Yokohama, JA;
Abstract
An apparatus for controlling spark advance in an internal combustion engine of an automotive vehicle, characterized by a circuit arrangement which is operative to detect the angular speed of rotation of the engine output shaft in a digital fashion and produce digital signals responsive to changes in preselected operating conditions such as engine output speed and intake manifold vacuum for controlling the spark advance in accordance with predetermined schedules. The spark advance is thus controlled without being affected by negligible or incidental transient fluctuations in the operating conditions of the engine and the advance characteristics can be readily altered by varying the schedules on which the digital signals are produced.