Distributor-type fuel injection pump governor

Claim 1

In a distributor-type fuel injection pump for an internal combustion engine, including: a pump housing having an inner chamber charged with fuel; means forming a pump work chamber in communication with said inner chamber; a distributor plunger adjoining said pump work chamber and delivering a quantity of fuel to said engine for injection during each pressure stroke, said distributor plunger having a relief channel in communication with said pump work chamber; a control sleeve mounted on said distributor plunger for controlling said relief channel; and a governor mechanism controlling the axial position of said control sleeve to vary said quantity of injected fuel by changing the terminal moment of fuel delivery during each pressure stroke of said distributor plunger, said governor mechanism having a stationary governor shaft, a governor sleeve axially displaceable on said governor shaft and having an inner space adjoined by said governor shaft and in communication with said inner chamber, centrifugal weights mounted for rotation about said governor shaft and mounted to swing outwardly displacing said governor sleeve in the direction to produce expansion of said inner space, and coupling means providing operative connection between said control sleeve and said governor sleeve; whereby said control sleeve is displaced in the direction to increase said quantity of injected fuel in response to displacement of said governor sleeve in the direction to produce contraction of said inner space; the improvement therein comprising forced fuel conveying means actuated by rotation of said governor sleeve and yieldingly forcing fuel to flow into said inner space, said forced fuel conveying means comprising a helical passageway defined by said governor shaft and said governor sleeve.