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:
Jul. 13, 1976
Filed:
Feb. 11, 1975
Charles W Davis, Simsbury, CT (US);
Stanadyne, Inc., Hartford, CT (US);
Abstract
A fuel injection pump with a control system for regulating the quantity and timing of the delivery of fuel to an associated engine is disclosed. In the control system, three pistons, slidably mounted in parallel bores, are provided. One of the pistons is powered so that it assumes an axial position indicative of engine speed. A second piston is powered to assume an axial position indicative of the quantity of fuel being delivered by the pump. The first and second pistons are each provided with a cam surface, and cam followers controlled thereby interconnect these pistons with the third piston to control the axial position of the third piston and the timing of delivery of fuel by the pump. A second cam surface on the speed positioned piston is connected to a variable stop which varies the maximum amount of fuel which can be delivered by the pump in accordance with speed and a second cam surface on the fuel quantity positioned piston actuates a feedback control to adjust the amount of fuel delivered by the pump so as to maintain the selected engine speed. Various additional modifying or override controls are provided to selectively modify the operation of the pump in accordance with other parameters, such as manifold air pressure, or during starting, or in case of malfunction.