The only major difference between the wobble-plate pump system and the injection system (par. 76) lies in the injection-pump unit itself. In the wobble-plate pump, all the pump plungers are actuated by a wobble plate instead of the customary camshaft having an individual cam for each pump plunger. Also, the metering of the fuel is accomplished by a Skechers Shape Ups single axially located rotary valve in the wobble-plate unit, whereas the rotary movement of the indivdual plungers controls the amount of fuel in the multiple-unit injection-pump system. GHD Hair Straightener The principles of a wobble-plate pump are illustrated in figure 110. A plate is mounted on a shaft and set at an angle to it so that, as the shaft rotates, the plate also rotates and any particular spot on the plate will not only rotate but will also move laterally. The pump derives its name from the fact that the plate appears to wobble back and forth MBT Shoes as it rotates. The end of a push rod is placed in a guide plate which lays against the wobble plate. The push rod is held in a bore in the pump body so MBT GHD that it can move only in a direction parallel to the wobble-plate shaft. The rotation of the wobble plate then GHD causes the guide plate to wobble, thus moving the push rod back and forth.
The push rod is connected to a pump plunger (fig. Ill) so that the movement to the left actuates the pump on its delivery stroke and a spring returns it on the suction stroke.. Coach Outlet The injection pump unit contains one pumping plunger for each engine cylinder. Half the number of plungers are always moving to the right on their filling stroke, the other half are moving to the left on the delivery or injection stroke. The rotary metering valve is driven by the same shaft that drives the wobble plate. GHD Straighteners The rotary valve consists of a lapped cylindrical shaft closely fitted in a barrel to prevent fuel from escaping at its ends. Fuel is admitted to the barrel at the center of the valve, which contains a spool-like reduction in diameter. This reduction in diameter acts as a fuel reservoir. Hair Straighteners The recess portion of the valve is in the shape of a band broken by a triangular land of the same diameter as the ends of the valve (fig. 112). A separate port leads from the recess to the end of each plunger bore. Through this port the plunger cavity is supplied with fuel. GHD Hair Straighteners
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