Document Type and Number:
Japanese Patent JPH02545
Kind Code:
B2
Abstract:
A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises an injection pump to which fuel is supplied by a low pressure pump. A part of the injection pump defines a surface against which a control pressure can act to vary the amount of fuel supplied by the injection pump, the part being spring loaded by a spring in a direction to oppose the force exerted by the control pressure and to increase the amount of fuel supplied. The control pressure is derived from the low pressure pump by means of a control system and if the output pressure of the low pressure pump should fall due to for example fuel starvation, the part will move in the direction to increase the amount of fuel supplied by the apparatus, this being permitted even though the output pressure is reduced. In order to avoid an increase in the amount of fuel supplied a pressure responsive valve is provided which is responsive to the output pressure of the low pressure pump and which closes to prevent fuel flow to the injection pump when the pressure falls below a predetermined value.
Inventors:
ROBAATO TOOMASU JON SUKINAA
Application Number:
JP14256281A
Publication Date:
January 08, 1990
Filing Date:
September 11, 1981
Export Citation:
Assignee:
LUCAS IND PLC
International Classes:
F02D1/02; F02M41/14
Next Patent: JPH02546