Fuel injection pump with distributor type fuel control
AssigneeFord Motor Company
InventorMichael M. Schechter
Life of this patent
Estimating the term…
Abstract
A fuel injection pump has a single plunger either electromagnetically or hydraulically actuated for flow of fuel into a fuel distribution chamber from which the fuel is distributed individually to each engine cylinder past a series of small solenoid controlled outlet valves actuated one at a time in sequence with the engine firing order.
Claims9
An automotive type internal combustion engine fuel injection pump including a housing having a central bore, a plunger reciprocably movable within the bore adjacent one end, a spring closed delivery control valve normally blocking the other end of the bore, a source of supply fuel under a first low pressure connected to the bore space between the plunger and valve for filling the space upon movement of the plunger away from the valve in a fuel intake stroke and for pressurization of the fuel to a level above the delivery valve spring force upon movement of the plunger towards the valve in a pumping stroke, a plurality of fuel outlet lines corresponding in number to the number of engine cylinders connected at one end to the bore downstream of the valve and connected at their other ends each to a separate engine cylinder, each of the outlet lines containing a fuel outlet valve normally closed to block fuel flow to the cylinders, each of the outlet valves having a solenoid connected thereto for moving the outlet valve to an open position upon energization of its solenoid, the solenoids being selectively energized one at a time to assure the injection of fuel into each cylinder on a one at a time schedule, force means to reciprocate the plunger, and stroke control means to variably control the stroke of the plunger to vary the duration and magnitude of injection of fuel to each of the outlet lines, the force means comprising a main solenoid having an armature connected to the plunger, the control means including electrical means to vary the voltage impulses to the main solenoid as a function of varying engine operating conditions to vary the duration and magnitude of pumping fuel by the plunger to agree with a predetermined schedule, the control means also energizing the fuel outlet line solenoids in sequence one at a time while deenergizing the remaining fuel outlet line solenoids to connect the output from the plunger past a different outlet valve upon each successive pumping stroke of the plunger.
An automotive type internal combustion engine fuel injection pump including a housing having a central bore, a plunger reciprocably movable within the bore adjacent one end, a spring closed delivery control valve normally blocking the other end of the bore, a source of supply fuel under a first low pressure connected to the bore space between the plunger and valve for filling the space upon movement of the plunger away from the valve in a fuel intake stroke and for pressurization of the fuel to a level above the delivery valve spring force upon movement of the plunger towards the valve in a pumping stroke, a plurality of fuel outlet lines corresponding in number to the number of engine cylinders connected at one end to the bore downstream of the valve and connected at their other ends each to a separate engine cylinder, each of the outlet lines containing a fuel outlet valve normally closed to block fuel flow to the cylinders, each of the outlet valves having a solenoid connected thereto for moving the outlet valve to an open position upon energization of its solenoid, the solenoids being selectively energized one at a time to assure the injection of fuel into each cylinder on a one at a time schedule, force means to reciprocate the plunger, and stroke control means to variably control the stroke of the plunger to vary the duration and magnitude of injection of fuel to each of the outlet lines, the force means comprising a source of high pressure fluid selectively connectable to the plunger for moving the same, the control means including electrical means to apply and vent the fluid to and from the plunger and to control the duration and magnitude of the fluid force level to control the pumping stroke of the plunger.
Dependencies are inferred from the claim text.