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. 04, 1989
Filed:
Dec. 31, 1987
Gerald Hofer, Bad Aibling, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection pump of the distributor pump type having a pump piston driven for simultaneous reciprocation and rotation, the supply quantity of which that is effective for injection is controlled by the opening of a relief conduit of the pump work chamber in that with the aid of a mechanical regulator an annular slide is moved into variable stroke positions on the pump piston. Additionally, for an electronic regulation of the total injection quantity, a pre-stroke (hv) is provided, which is determined by a first valve and which, under the control of a second, electrically controlled valve connected to the output side of the first valve, is added to the basic supply stroke in a variably effective manner in terms of injection. Thus the fuel injection quantity can be regulated within the context of the fuel injection quantity difference resulting from the pre-stroke.