F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
123/130
F02D 7/00 (2006.01) F02M 47/00 (2006.01) F02M 57/02 (2006.01) F02M 59/10 (2006.01) H01F 7/16 (2006.01)
Patent
CA 1051735
ABSTRACT OF THE DISCLOSURE The present invention provides a fuel injection system for supplying fuel to an internal combustion engine comprising in combination, a stepped valve member movable within a cylinder, the narrower end of said valve member constituting a valve to control flow through an outlet, a conduit through which the wider end of said valve member is subject to a fluid pressure so that the valve is urged to a closed position, a further conduit through which fuel under pressure can flow to act on a step on said valve member to move the valve member to an open position and to allow fuel flow through said outlet, a displacement piston movable within a cylinder, one end of said cylinder communicating with said further conduit, a valve controlled fuel inlet to said one end of the cylinder, an operating piston slidable within a further cylinder, said operating piston having a larger area than said displacement piston, a supply conduit leading to the end of said further cylinder remote from said displacement piston, a first solenoid operated valve for connecting said supply conduit to said first mentioned conduit whereby when said first solenoid operated valve is open the displacment piston will be moved to generate a fuel pressure to act on said valve member, a second solenoid operated valve operable when said first solenoid operable valve is closed, to connect said supply conduit with a drain thereby to permit the displacment and operating pistons to move under the action of fuel flowing to said one end of the cylinder means for sensing the extent of movement of said pistons and a control circuit to which a signal from said means is supplied for controlling the operation of said first and second solenoid operated valves.
260777
Lakra Paul
Seilly Alec H.
LandOfFree
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