Appeal No. 1997-4373 Page 3
Application No. 08/332,656
BACKGROUND
The appellants' invention relates to a high pressure fuel
injection system for an internal combustion engine and a fuel
injection pump. An understanding of the invention can be
derived from a reading of exemplary claims 1 and 23, which
read as follows:
1. A high pressure fuel injection system for
an internal combustion engine comprising a fuel
injector having chamber to which fuel under pressure
is delivered and which communicates with the engine
through an injector valve, a high pressure fuel
injection pump having an output port in which a
delivery valve is positioned, conduit means
interconnecting said high pressure fuel injection
pump output port with said fuel injector for
delivering fuel thereto, means positioned downstream
of said delivery valve for sensing the pressure in
said conduit means, and means positioned downstream
of said delivery valve for reducing the pressure in
said conduit downstream of said delivery valve in
response to engine running conditions for providing
the desired amount of fuel discharge by said fuel
injector.
23. A high pressure fuel injection pump
comprising a bore, a plunger reciprocating in said
bore for pressurizing fuel therein, a delivery
passage having a delivery valve at the end of said
bore for discharging fluid pumped by said plunger, a
release passage intersecting said bore at a point
intermediate the ends of the stroke of said plunger,
and control valve means for selectively opening and
closing said release valve passage for controlling
the pressure output by said plunger.
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