Fuel injection pump having a two piston spill valve arrangement

Details Fuel injection pump having a two piston spill valve arrangement Fuel injection pump having a two piston spill valve arrangement

1995-11-28

1997-06-17

Thorpe, Timothy

Pumps

Expansible chamber type

Having separate noncyclic valve

123506, F02M 4114

Patent

active

056392290

ABSTRACT:
A fuel pumping apparatus comprises a pumping plunger reciprocable in a bore to supply fuel to the cylinders of an associated engine. A spill valve arrangement is provided to control fuel delivery, the spill valve arrangement including a valve member coupled to a first piston which is slidable within a first cylinder. Passage means are provided in the first piston interconnecting the ends of the first cylinder permitting restricted flow therebetween. A second piston slidable within a second cylinder is arranged to engage an end of the first piston, a spring biasing the second piston towards the first piston and biasing the valve member into engagement with a valve seat. In use, at high engine speed the pressure of fuel between the pistons increases, separating the pistons permitting fuel to escape through a passage provided in the second piston. Such an escape of fuel results in additional fresh, cool, fuel being drawn into the pumping apparatus thus cooling the pumping apparatus.

REFERENCES:
patent: 4874301 (1989-10-01), Greeves et al.
patent: 5119786 (1992-06-01), Collingborn et al.
patent: 5207202 (1993-05-01), Collingborn et al.
patent: 5413081 (1995-05-01), Collingborn
patent: 5478213 (1995-12-01), Harris et al.
patent: 5546906 (1996-08-01), Cooke

Affiliated with

Also associated with

Rating

Fuel injection pump having a two piston spill valve arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fuel injection pump having a two piston spill valve arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel injection pump having a two piston spill valve arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2154510