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:
Aug. 09, 1977
Filed:
Sep. 05, 1975
Claude Leichle, Le Pecq, FR;
Regie Nationale des Usines Renault, Boulogne-Billancourt, FR;
Automobiles Peugeot, Paris, FR;
Abstract
The operation of each electromagnetic fuel injector of an internal combustion engine is controlled so that when an energizing current is caused to flow from the battery of the engine through the coil of the fuel injector, the time taken for the current to reach its full value is controlled electronically so that it is a constant irrespective of the battery voltage but no shorter than would naturally result if the battery were to deliver its predicted lowest voltage directly to the coil, the necessary control being obtained by generating a constant electric current and using it to charge a capacitor to a predetermined voltage, comparing the voltage of the capacitor with a voltage which is proportional to the energizing current flowing through the coil, and controlling the build up time of the energizing current so that it is equal to the time taken to charge the capacitor, this being constant.