Pumps – Expansible chamber type – Pumping member position controlled port
Patent
1983-04-22
1984-12-25
Smith, Leonard E.
Pumps
Expansible chamber type
Pumping member position controlled port
F02M 5926
Patent
active
044900988
ABSTRACT:
A fuel-injecting pump for diesel engines comprises pump cylinders, which are associated with respective engine cylinders and enclose a pump piston, which is adapted to be driven by a camshaft. The pump cylinders are provided with at least one radial fuel port, which at its opening into the pump cylinder is adapted to be closed and opened by the pump piston, which has two axially spaced apart valve edges. The opening of the fuel port into the pump cylinder has in that region which during the discharge stroke of the pump is first reached by the opening valve edge a substantially larger radius of curvature in the peripheral direction than in the adjacent lateral regions. Said opening and the opening valve edge have a common tangent at that point of the opening which is reached last by the opening valve edge during the discharge stroke of the pump. In order to achieve a rapid pressure drop in the pump cylinder at the end of the fuel injection with simple means in spite of inaccuracies which are due to the manufacture, the opening of the fuel port into the pump cylinder has in that region which is first reached by the opening valve edge a radius of curvature in the peripheral direction which is twice to four times the radius of curvature of a circle having the same area.
REFERENCES:
patent: 1958948 (1934-05-01), Knecht
patent: 3737258 (1968-07-01), Kravja et al.
Freudenschuss Otto
Morell Josef
Rollenitz Leopold
Schmidt Harald
Kelman Kurt
Smith Leonard E.
Steyr-Daimler-Puch Aktiengesellschaft
LandOfFree
Fuel-injecting piston pump for diesel engines 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-injecting piston pump for diesel engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel-injecting piston pump for diesel engines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1150689