Fluid pressure regulator

In a fuel supply system for an internal combustion engine which burns a combustible fluid, the improvement of a system for controlling fluid pressure in a fluid supply passage of said engine comprising a first member having a fluid passage formed therein and leading to an opening formed in a side thereof, pump means connected to said passage and adapted to pump fluid under pressure from a fluid supply through said passage and out of said opening, means connected to said passage and operating in response to the fluid pressure in said passage, a closure member positioned adjacent said first member at said opening, means mounting said members for relative movement in a first direction toward and away from one another to form a space therebetween, force applying means engaging at least one of said members and urging said members toward each other so as to close said space, a recess formed in the side of said closure member which faces said first member, said recess at least partially overlying said opening, fluid in said passage exerting pressure over an area of said closure member and moving said closure member away from said first member to form said space therebetween and thereby to enable the fluid to flow out of said opening and through said space, and means mounting said members for relative movement in a second direction which is generally lateral of said first direction in order to vary the amount of said recess which lies outside of said opening, the pressure of the fluid in said passage being equal to the force of said force applying means divided by said area, and said area being equivalent to the area of said opening plus any area of said recess which lies outside the margin of said opening.

In a fuel supply system for an internal combustion engine, the improvement of means for regulating the pressure of fuel being supplied to said engine, comprising a housing having a plunger bore formed therein, a plunger reciprocably mounted in said plunger bore, a centrifugal mechanism adapted to be turned at a rate which is a function of engine speed, said centrifugal mechanism being connected to said plunger and moving said plunger in accordance with changes in engine speed, a main fuel flow passage formed in said housing, a bypass fuel flow passage formed in said housing and communicating with said main fuel flow passage, said bypass fuel flow passage including an opening which is movable with said plunger, a closure member positioned adjacent said plunger at said opening, means mounting said closure member for movement in a first direction toward and away from said plunger to form a space therebetween, force applying means engaging said closure member and urging said closure member toward said plunger so as to close said space, a recess formed in the side of said closure member which faces said plunger, said recess at least partially overlying said opening, fuel in said bypass fuel flow passage exerting pressure over an area of said closure member and moving said closure member away from said plunger to form said space therebetween and thereby to enable the fluid to flow out of said opening and through said space, and means mounting said member for movement relative to said plunger in a second direction which is generally lateral of said first direction in order to vary the amount of said recess which lies outside of said opening, the pressure of the fuel in said bypass fuel flow passage being equal to the force of said force applying means divided by said area, and said area being equivalent to the area of said opening plus any area of said recess which lies outside the margin of said opening.