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. 03, 1989
Filed:
Dec. 22, 1987
Franz Eheim, deceased, late of Stuttgart, DE;
Max Straubel, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A fuel injection pump of the distributor type in which a pump piston is driven to reciprocate and rotate simultaneously, thereby acting as a distributer. For fuel injection quantity regulation, an annular slide that is displaceable on a pump piston is provided, by way of which the pump work chamber can be relieved. To attain a low injection rate in the idling range, in addition to a first outlet opening, controlled by an upper edge of the annular slide, second outlet openings axially offset from the first are provided, for a relief conduit of the pump work chamber which cooperate with a radial control opening, which communicates with the pump suction chamber and is disposed in the wall of the annular slide. In the opening direction of this control opening, a groove provided with a throttle is provided, by way of which during idling operation, prior to the opening of the first relief opening, fuel can flow out of the pump piston in order to decrease the pumping rate of the pump piston. For higher load ranges, the control opening is moved out of the operative range of the groove which is effected by rotating the annular slide or interrupting the communication of the control opening with the suction chamber.