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:
Jan. 30, 1979
Filed:
Jun. 29, 1977
Werner G Mannhardt, Detroit, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
Metering valves in diesel engine fuel injection systems are disclosed. The systems each include a high pressure fuel pump, a fuel distributor, at least one metering valve, and fuel injector nozzles. In the preferred embodiment, the valves are of a type having a spool or valving member which moves axially in a bore from a second position to a first position and while so moving an annular groove, defined in the circumferential surface of the spool, traverses a valve outlet passage at velocities independent of engine speed for metering fuel to the engine during the traversing time. The spool may be moved from the second position to the first position by a spring or a solenoid and in the reverse direction by a stepped cam, a spring, or a solenoid. The distributor blocks fuel metering to the engine during reverse movement of the spool. The spool includes a pair of triangular cavities which continuously communicate with the groove and which control the amount of fuel metered for each traversing by moving out of communication with a pair of valve inlet passage openings at a variable point during each traversing of the outlet passage by the groove. The point is varied by changing the angular position of the spool in the bore as a function of throttle position.