Abstract: A method and apparatus for injecting timed pulses of fuel of variable quantity into a high speed compression-ignition engine.

Abstract: A linear retractable seal valve having a wedge sealing-slip assembly slideably held at opposite side edges of the wedge to guide rails of the valve body and moveable from a distant first location to a second location between inlet and outlet ports of the valve from which latter location the sealing slips are wedged outwardly of the longitudinal movement of the assembly into closure engagement with the valve ports, with the valve being returned to its open position through a reverse sequential movement wherein there is first a perpendicular movement of the slips out of closure engagement with the valve ports, following which there is a reverse longitudinal movement of the wedge-slip assembly away from the fluid passageway to its valve open first location.

Abstract: A linearly displaceable poppet controls the flow of fluid through a valve. The poppet has an external annular channel to communicate an inlet and an outlet port of the valve. Abutting poppet sleeves define a dovetailed groove of restricted volume, the sides of which extrude a Teflon O-ring into the path of a shoulder of the wall defining the channel to close the valve. The extruded section is on the high pressure side of the poppet and is backed by the shoulder and an adjacent poppet sleeve. The seat and seal thus defined are spaced from the channel outlet to the outlet port to avoid erosion from throttling.