Fuel injection pumping apparatus

Details Fuel injection pumping apparatus Fuel injection pumping apparatus

1981-09-23

1983-08-30

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

123179L, 417462, F02M 3900, F04B 2310

Patent

active

044010842

ABSTRACT:
A liquid fuel injection pumping apparatus of the rotary distributor type has two forms of cam lobe on its cam ring. The first form of cam lobe is a pumping lobe which can effect inward movement of a plunger to achieve pumping of fuel and after the crest of the lobe has been passed allows outward movement of the plunger to lower the fuel pressure in the various passages in the apparatus. The other form of lobe is a holding lobe which while one plunger is being moved inwardly holds another plunger against movement. When the crest of the holding lobe is reached the associated plunger is allowed to move outwardly and this movement is arranged to take place shortly before the end of the inward movement of the plunger associated with a pumping lobe. The effect is to reduce the period towards the end of fuel delivery at which fuel is supplied at a reducing rate.

REFERENCES:
patent: 4242059 (1980-12-01), Mowbray
patent: 4299542 (1981-11-01), Potter

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