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. 23, 1990
Filed:
Oct. 20, 1989
Konrad Eckert, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection device for internal combustion engines having externally supplied ignition, which enables introducing fuel injection quantities into combustion chambers in a manner that is controlled precisely in terms of quantity and of the instant of injection. The fuel injection device includes a first magnet valve by which fuel at injection pressure is pre-stored in a reservoir chamber, and the pre-stored quantity is ascertained by measurement of the deflection stroke of a reservoir piston which defines the reservoir chamber. Once the pre-storing process is complete, the pre-stored fuel quantity is then delivered to the injection valve with the air of a second magnetic valve. All that the fuel injection pump needs besides the two magnet valves and a control unit is a pre-feed pump, which pumps fuel into a high-pressure reservoir, so that while making limited demands on the pump generating the high pressure, a simple and very precisely functioning fuel injection device is created.