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:
Oct. 14, 1980
Filed:
Dec. 04, 1978
Johannes Steinwart, Obersulm-Willsbach, DE;
Armin Bauder, Neckarsulm, DE;
Audi NSU Auto Union, Neckarsulm, DE;
Abstract
A fuel injection system for a mixture-compressing externally ignited internal combustion engine includes a flow sensing member (3) arranged in an air intake duct (1), the member (3) moving in accordance with the quantity of air flowing through the duct so as to actuate a fuel metering valve (7) and to dispense a quantity of fuel to fuel injection nozzles (9) of the engine. The pressure difference in the metering valve (7) is maintained constant by means of a pressure sensitive valve (11) and a differential pressure control valve (20), each of which has two chambers separated by a diaphragm (12 and 21). The differential pressure control valve (20) is actuated on both sides by springs (34, 36 and 54) whose loading stress can be varied according to engine operating parameters. The loading stress of the springs is adjusted by devices for full-load fuel concentration and cold-starting fuel enrichment, and also a device responsive to air pressure changes.