Abstract:
A high pressure fuel injector system including a high pressure fuel pump useable with a pressure booster, a pressure stabilizer with a high speed tandem actuated distributor and a fuel having a fuel injector with high pressure fuel admisstion passages and low pressure fuel return passages with a needle valve hydraulically operated by high pressure fuel from the high pressure fuel admission passage by a distributor valve which selectively directs a hydraulic pressure fuel against one side or the other of a piston body forming part of the needle valve whereby the needle valve is urged to a position closing discharge orifices or position opening discharge orifices the distributor valve being controlled by an electronic actuator wherein the injector system is designed with unique floating valve pistons in the components, the components being useable separately or together in the integrated systems preferred for high pressure, high speed operation.
Abstract:
A fuel injection pump for internal combustion engines having a reciprocating pump piston and an annular slide displaceable on it, with a control bore that cooperates with a control recess on the pump piston, the recess communicates with a pump work chamber via a conduit. By means of location of control bores in the annular slide, the outflow stream is provided with the longest possible path until the outflow stream strikes the wall of the cylinder liner, in order to attain the freest and most unhindered possible stream course with reduced turbulence. Because the outflow stream strikes the hardened surface of the niche wall of the cylinder liner obliquely, cavitation damage is greatly attenuated or locally limited to sites of maximum resistance.
Abstract:
A pump nozzle for a diesel engine, in which an injection pump element including a pump piston driven by a cam-shaft via a thrust element and a pump element bushing is combined with an injection nozzle to provide a unit to be associated to one motor cylinder. The pump piston is surrounded by a control sleeve which is non-rotatable relative to the pump element busing. The pump piston can be rotated for adjusting its orientation relative to the control sleeve for the purpose of adjusting the supplied amount of fuel. An adjuster for adjusting the amount is disposed at substantially the same level as of the thrust element. The control sleeve is arranged completely within a pump spring, which partly surrounds the pump element bushing. The pump dement bushing is formed integrally with a blind longitudinal bore which receives the pump piston. The pump spring extends from the level of the adjuster for adjusting the amount of fuel to be injected per injection, to the level of the working chamber of the pump piston. This provides an overlapping arrangement of the separate parts of the pump nozzle, so that the structural dimensions of the pump nozzle may be kept small.
Abstract:
A fuel injection pump for internal combustion engines, having a plurality of in-line pump elements in which the supply onset is effected by means of control slides, one of which is axially displaceable on each of the pump pistons and by controlling relief conduits of the pump work chambers. The control slides are actuated via a torque shaft in that via driver tangs which are secured to the torque shaft by fastening parts screwed to the torque shaft, the control slides are axially displaced upon rotation of the torque shaft. For adjusting the stroke or axial position of the individual control slides to one another, spacer means, in particular shims are provided between the fastening part and the torque shaft in the stroke direction of the control slides.
Abstract:
A fuel injection pump for internal combustion engines having control slides that are both axially displaceable and rotatable on the pump piston via a governor rod for controlling the injection quantity and the injection onset. A slit hub is releasably clamped on the governor rod with a driver arm, the hub being arranged to engage the control slide between two working faces and the hub has a driver recess for the rotational adjustment of the control slide. The driver recess is engaged by a tang joined with the control slide.
Abstract:
A fuel injection pump has a control sleeve slidably fitted over a plunger. The plunger is provided with two lateral holes and an inclined groove open to and extending between respective ends of said lateral holes. The end of injection occurs when the inclined groove communicates with a cut-off port formed in the control sleeve, and the timing of injection is adjustable by the rotation of the plunger. To keep fuel noninjected, the plunger is rotated to a position at which the second lateral hole is brought into communication with the cut-off port.
Abstract:
A plunger assembly within a barrel is transversely split into two segments, with a timing fluid chamber therebetween for controllably varying the distance between the plunger segments in response to pressure applied thereto by a timing fluid introduced under variable pressure through a timing fluid inlet port. As the total length of the plunger assmebly is thus varied controllably, so is its prestroke which is the distance traversed by the plunger assembly on its compression stroke from one extreme position thereof to an intermediate position where the plunger assembly completely covers the fuel inlet port. Not only is the injection timing thus controlled by the injection pump itself, but also a high injection pressure is realized at low engine speed or under light load.
Abstract:
In an rpm regulator for fuel injection pumps of internal combustion engines having a starting lever, which is coupled on one side with a delivery quantity adjustment member of the injection pump and on the other side of which an rpm tachometer contacts the starting lever with an rpm-dependent force counter to an arbitrarily variable force of a main regulator spring and also counter to the force of a starting spring which is included in series with the main regulator spring and deformable up to a particular stop, it is proposed to provide a further stop which urges the starting lever counter to the direction urged by the starting spring, whereby this second stop is adjustable in accordance with the temperature in order to regulate the starting quantity. The temperature of the coolant, of the lubrication oil, as well as that of a housing wall of the internal combustion engine may be employed for this purpose. It is also possible to employ the temperature of the inner chamber of the regulator of the injection pump itself as the regulatory value. By employing a stop element which is adjustable in accordance with temperature, the starting quantity may be increased during either cold or hot starting, since there are engines which require an increased starting quantity not only at low temperatures but also at extremely high temperatures.
Abstract:
An improved rpm regulator for a fuel injection pump associated with an internal combustion engine. The regulator includes a control lever, a fuel quantity control sleeve connected to the control lever, a regulating spring assembly connected to the control lever, a device for generating an rpm signal and applying a corresponding force through the control lever to the fuel quantity control sleeve in opposition to a force exerted by the regulating spring assembly and an adjustment lever connected to the regulating spring assembly for adjusting the preload exerted by the regulating spring assembly. The regulating spring assembly is improved and includes two holding members containing two compression springs so that when the two holding members are moved outwardly relative to each other the two springs are compressed. The springs are chosen and the holding members designed so as to minimize the degree of variation which can occur during a control process.