摘要:
A piston mechanism is driven in accordance with fuel pressure from a feed pump by a control valve controlled in response to a control signal from a control device. A spill ring of a fuel injection pump is moved by the piston mechanism, and torque characteristics of an engine are set at a desired value without receiving an influence of fuel pressure.
摘要:
A fuel injection system is proposed which serves to inject fuel into the combustion chambers of internal combustion engines. The fuel injection system includes at least one inlet and one outlet line each for the fuel, at least one pump piston to supply the fuel to an injection valve, and at least one apparatus to adjust a parameter of the injection system, such as instant of injection, or quantity of injection, or both. Furthermore, the fuel injection system includes an electro-fluidic transducer which can be controlled by an electronic control device, the electro-fluidic transducer acting to adjust the desired parameter.
摘要:
A control system for adjusting the fuel injection pump and other auxiliary assemblies associated with a fuel injected internal combustion engine includes a mechanical centrifugal governor which is spring loaded and is connected to adjust the operation of the fuel injection pump based on the rate of rotation of a control shaft of the engine, the governor including an axially movable end support member for the spring, and a servomotor which is operatively connected to the end support member and to an auxiliary assembly such that it adjusts the operation of the auxiliary assembly based on the axial positioning of the end support member.
摘要:
A fuel injection pumping apparatus comprises an axially movable distributor member the axial setting of which determines the amount of fuel supplied by the apparatus at each pumping stroke. The distributor member is biassed by a spring in one axial direction and is movable in the opposite direction by varying the fluid pressure in a chamber through a port. The port is formed in a sleeve which is coupled to the distributor member by means of a lever and a rod member is axially movable within the sleeve. The axial position of the rod member can be varied to alter the effective size of the port and the distributor member and sleeve move because of the change in pressure in the space. A new equilibrium position is thus established with the distributor member following the movement of the rod member.
摘要:
There is described a multicylinder fuel injection pump which is provided with a device that extends the length dimension thereof. The device includes a longitudinally shiftable piston disposed in a chamber that opens into the fuel injection pump. The shiftable piston includes perpendicularly disposed pin means arranged to cooperate with a fuel rack. In the rest position of the piston the regulating movements of the fuel rack caused by the governor are either unhindered because of the correspondingly long recess in the fuel rack, or limited to a predetermined travel path.
摘要:
An apparatus to control the composition of the operating mixture of an internal combustion engine in which the fuel is apportioned by means of a variable cross-sectional apportionment area where the pressure drop is kept constant by a differential pressure valve. The uncontrolled pressure chamber (reference pressure chamber) of the differential pressure valve lies downstream of an apportioning recessed area. A given fuel discharge quantity from the controlled pressure chamber of the differential pressure valve is determined in accordance with the fluctuations of the pressure in the reference pressure chamber, and a positioning motor provided for the correction of the magnitude effecting the deviation of the reference pressure is further actuated in accordance with the discharge quantity. The controlled pressure chamber lies upstream of the apportioning recessed area within a fuel supply line connected to a fuel feed pump, and a storage chamber having a wall displaceable against a restoring force as well as a pressure control valve that is connected to the fuel supply line.
摘要:
An improved fuel-air ratio control apparatus for a supercharged engine having a governor means connected to a fuel adjusting member and a supercharger for supplying air through an intake manifold is disclosed. The control apparatus is directly engageable with the fuel adjusting member and is responsive to intake manifold air pressure and engine oil pressure. The apparatus is inoperative to restrain the adjusting member during start-up of the engine and remains so until such time as a predetermined intake manifold pressure is attained, at which time the control apparatus moves to a position which permits the metering of engine oil therethrough to permit normal governor operation and proportional increases of fuel with air pressure increased. The control apparatus thereafter automatically limits the fuel supplied to the engine, and therefore engine torque rise, during a decrease in engine speed caused by loading on the engine to thereby limit any undesired exhaust smoke. The improvement relates to the amount of torque reduction available from two torque reducer springs, and to the new means for adjustment of the rate of torque reduction using jam nuts.
摘要:
There is disclosed an automatic control system for limiting the operating temperature of a diesel engine having a shut down lever that repositions the rack of its fuel pump to a shut down position that closes the pump metering valves and shuts off the fuel supply to the engine. The system includes a pyrometer to sense the exhaust gas temperature from the engine and generate a signal therefrom, a temperature controller having an adjustable, maximum set point temperature to receive the signal from the pyrometer and to generate a control signal which is applied to a control valve in a fluid pressure line which applies fluid pressure to a pressure responsive actuator that moves the shut down lever a fraction of its full travel necessary for shut down and thereby repositions the fuel pump rack to a throttling position in response to a sensed exhaust gas temperature which exceeds the preselected maximum set point temperature.
摘要:
The disclosed liquid fuel injection pump is suited for the delivery of measured charges of liquid fuel under high pressure sequentially to the cylinders of an associated engine and includes a free piston type plunger reciprocably mounted in a pump chamber, wherein the charges are pressurized to high pressure, a stop for the pump plunger to limit the maximum volume of the chamber, a hub mounting a plurality of rollers to engage the camming surface of a tappet interposed between the plungers and the rollers to drive the pump plungers in a direction to reduce the volume of the pump chamber, and hydraulic means to power said pump plunger in the opposite direction. The hydraulic means includes a passage containing fuel under pressure in continuous communication with the pump chamber with a one-way valve in the passage unseated by the pressure therein after the release of the pump plunger by the rollers to hydraulically power the plunger against said stop and fully charge said pump chamber prior to each pumping stroke of the pump plunger, the tappet being mounted by a timing piston to shift the timing of the pumping strokes according to engine operating parameters. A spill metering system is disclosed with the spilled fuel being stored in an accumulator to supply the fuel for the succeeding pumping stroke. The hub is hollow and mounts Z-shaped flyweights so that they are insensitive to shock forces and have a rate of increase in their rotating moment substantially less than a square function of speed to provide, in cooperation with a unique pressure regulator, a control pressure for the governor and timing functions of the fuel injection.
摘要:
This disclosure deals with a variable fluid pressure regulator wherein the level at which the fluid pressure is regulated is adjustable. A member has a flow passage formed therein, and the fluid flows through the passage and out of the member, and a closure is positioned over the opening. The closure is yieldably mounted relative to the member and a spring urges the closure toward the opening. A recess or cavity is formed in the closure, and the fluid flows from the opening, into the recess, and then through a space between the closure and the member. The fluid pressure in the passage is a function of the spring force and the effective area of fluid pressure on the closure, and the effective area comprises the area of the opening plus any area of the recess which lies outside the margin of the opening. The regulated fluid pressure level may be varied by laterally shifting the closure relative to the opening in order to change the effective area.