Robert Boschgmbh

Ernst Ritter

Reinhard Schwartz

Ilija Djordjevic

Max Straubel

Sieghart Maier

Rolf Muller

Werner Faupel

Karsten Hummel

Werner Bruhmann

Werner Lehmann

Heinrich Staudt

Konrad Eckert

Johannes Locher

Johann Warga

Manfred Kramer

Eberhard Hofmann

Klaus Schmidt

Thomas Lang

Karl Rapp

Wolfgang Eckell

Martin Bohm

Hansjorg Frey

Josef Trui

Hans-Jurgen A Jaenke, Deceased

Waldemar Sturm

Rolf Muuller

Werner Volz

Friedrich Russeler

Heinrich Hampel

Reinhard Doll

Werner Br/u/ Hmann

Hansj/o/ Rg Frey

Hans-Jurgen Jaenke

Helmut Fiedler

A fuel injection pump for internal combustion engines having in-line cylinder bushes, in each of which a pump piston defining a pump work chamber is guided, the piston being rotatable by a governor rod for the sake of fuel supply quantity regulation. Mounted on the pump housing is an adjusting device, in which an adjusting piston is guided axially parallel with the governor rod; the adjusting piston has a radial pin, which protrudes through a slit in the wall of the adjusting device and pump housing into an oblong slot of the governor rod, thus limiting the adjusting motion of the rod in certain operating ranges. The position of the adjusting piston determines the maximum governing travel of the governor rod in the full-load direction upon engine starting. The adjusting piston is variable via an adjustable stop acting upon one face end thereof and is also variable as a function of temperature via a temperature-dependent spring element disposed on its circumference. In addition, with its face end, the adjusting piston defines a pressure chamber, by way of which the adjusting piston can be adjusted pneumatically in the direction of a zero supply quantity; via two stops of the oblong slot, the adjusting piston moves the control rod with it in the process and in this way interrupts the fuel delivery.

Fuel injection pump for internal combustion engines

Centrifugal speed governor of fuel injection pumps

Each of the pump cylinders disposed in a line, of the fuel injection pump is surrounded in the vicinity of an overflow opening controlled by control edges of the pump piston by a partial suction chamber embodied as a hollow space. Each of these partial suction chambers is supplied with fuel, beginning at an inflow conduit via a throttled inflow opening and the fuel is carried away again via a return-flow opening into a return-flow conduit common to all the pump cylinders. Because of the crosswise flushing of each individual partial suction chamber the fuel temperature in these partial suction chambers is kept at least virtually constant, in order that identical fuel quantities will be supplied to the individual pump cylinders.

The governor (FIG. 1) includes a second idling spring (supplementary idling spring 42) secured on a force transmission lever (31) acted upon by the main governor spring (34). By means of the second idling spring, the restoring force of a first idling spring (38) on a portion of the idling sleeve path (a) is reinforced in the idling position of an adjusting member (22). This exertion of force on the part of at least the supplementary idling spring (42) is increased in accordance with load by means of a corrective adjusting member (44) when the adjusting member (22) has pivoted into a partial-load position. As a result, in order to improve the starting behavior even in minimum-maximum speed governors, a partial-load rpm located above the idling rpm can be regulated, and a progressively increased supply quantity is controlled at the associated injection pump with increasing load in the lower partial-load range.

Rpm Governor for fuel-injected internal combustion engines, in

A flyweight governor comprising first and second sets of flyweights disposed pivotably on a flyweight support, the flyweights of the first set are arrested by stops after having traversed an idle speed angle of traverse (.alpha..sub.LL), on which stops the flyweights of said second set rest only after having traversed the total angle of traverse (.alpha..sub.max). The flyweight masses of the first set of flyweights acting only in the idle speed control have, in their position of rest, an outer contour which is, in comparison to said second set of flyweights, displaced further outwardly with an inclination angle (.beta..sub.LL) to the rotational axis (A) corresponding to the idle speed angle of traverse (.alpha..sub.LL). The flyweight governor can be used in particular for the idle speed-maximum speed rpm governors of Diesel engines for vehicles and causes a large reduction of the centrifugal forces ordinarily appearing at maximum rpm, while at the same time allowing an increase in the performance capacity in the idle speed control range.

Centrifugal rpm governor for fuel injected internal combustion engines

There is proposed an improved fuel injection pump which will prevent erosion at the pump housing caused by the fuel stream leaving the return flow openings at the end of injection, by providing an impact protection ring on the cylinder bushing. Guide faces on the ring inclined toward the center (M) thereof are molded into the impact protection ring in the vicinity of a cylindrical wall portion. The impact protection ring rests on an abutment shoulder disposed above the return flow openings, in the vicinity of the return flow openings encloses an annular chamber, and is pressed by a snap ring without play and with a defined prestressing force against the abutment shoulder. As a result of the guiding action of the guide faces on the impact protection ring, a rotational movement of the impact protection ring triggered by the obliquely exiting fuel stream is assured, in order to attain a long service life for the pump.

A rotational body supported in a housing of the apparatus carries an angle indication marker, which serves as a signal trigger of a signal transducer secured in a positionally fixed manner relative to the housing of the rotational body. The signal transducer has a transducer body axially displaceably disposed in its transducer housing. This body is displaceable in the direction of its longitudinal axis in order to actuate a first contact switch, and is provided inside its other end face with a switch contact, cooperating with the angle indication marker, of a second contact switch. After the actuation of both contact switches, the angle indication marker is located in a predetermined rotary position, which is indicated in the associated test circuit and serves in particular to ascertain the supply onset position of the drive shaft of a fuel injection pump for internal combustion engines.

Apparatus for ascertaining a predetermined rotary position of a

An apparatus is proposed for positionally fixing a drive shaft disposed in a fuel injection pump for internal combustion engines in a predetermined rotary position, in particular one associated with the onset of fuel supply, and for measuring and testing this rotary position. The apparatus is provided with an apparatus into the reception bore of which either a holder element or an electric pulse transducer can be inserted. An element firmly connected with the drive shaft is provided with an angle-indicator marking, which is equipped both as a coupling element for the position-fixing apparatus and as a pulse trigger for the pulse transducer. The apparatus can thus be used both as a locking apparatus for mounting the injection pump on the engine and, with the pulse transducer inserted, as a measurement and testing apparatus.

Apparatus for positionally fixing a drive shaft disposed in a fuel

A method is proposed in which the injection pump, having been adjusted in terms of the supply quantity and of the supply onset, is provided on a test bench, before being mounted on the internal combustion engine, with an electric pulse transducer, whose mounted position is marked on the injection pump. The pump may also be corrected, at a fixed test rpm, to a set-point value fixed relative to the supply onset signal by means of measuring the signal distance between the supply onset signal of a signal transducer measuring the dynamic supply onset and the rotary-position signal of the pulse transducer. The injection pump, with the camshaft rotated into the rotary position associated with the dynamic supply onset, is mounted on the engine which has been brought with its crankshaft into the associated working position. For testing and if needed correcting the mounted position of the injection pump on the engine, only the signal distance between the rotary-position signal and a dead-center signal of a dead-center transducer secured on the engine is tested and corrected if needed to a fixed set-point value. This measurement can be performed with a conventionally available ignition angle testing device.

Method for angularly correct mounting of a fuel injection pump on an

A centrigural rpm governor for fuel injected internal combustion engines is proposed in which an adaptor assembly located inside the governor can be used over the entire range of practical applications of such a governor. The governor includes parallel coextensive arms, a governor lever and a cooperative governor rod which has a counterstop provided with a sliding block that is movably disposed between the parallel coextensive arms against the initial stressing force of a spring member with the counterstop being arranged to cooperate with a stop means pivotally associated with the housing. The spring member is arranged to load the sliding block and adjustable for the purpose of varying the initial stress and setting the onset of adjustment.

Centrifugal RPM governor for fuel injected internal combustion engines

A centrifugal governor for fuel injected internal combustion engines is proposed, especially an idling and final rpm governor for Diesel vehicle engines, in which the sudden emission of smoke upon starting of a heavily loaded engine is prevented. The improved governor comprises an additional idling spring secured on a force transmitting lever which is acted upon by the main control spring and by means of which additional idling spring in the idling setting of the service lever the restoring force of the idling spring on a portion (b) of the idling sleeve path (a) is amplified. This force of the additional idling spring is, however, made at least partially ineffective by a thrust member when the service lever is pivoted into the full-load position. Further, there is disclosed a governor which is equipped with an additional idling spring which comprises two additional springs, the aforementioned thrust member being arranged to act only upon the second additional spring, while the first additional spring remains coupled with the governor sleeve via a connecting member in order to improve starting.

Centrifugal rpm governor for fuel injected internal combustion engines,

A pneumatic diaphragm control member is proposed for a fuel injection device for internal combustion engines, especially for a boost-pressure dependent full-load stop, wherein the initial and end positions of a push rod provided with a control diaphragm and movable against a resetting spring can be varied, and wherein the effective pressure range is variable by means of separate adjusting means which do not affect one another. The push rod of the diaphragm control member contacts, in the unpressurized starting position, a stop screw mounted in the lid cover, and, in the pressurized end position, is in contact, by means of a counter stop attached to an extension of the push rod and adjustable in the direction of motion of the push rod, with a second end stop arranged in the pressure chamber. Thus, the bias of the resetting spring can be changed by changing the position of a bearing bushing for the push rod, which bushing serves as an abutment.

Pneumatic diaphragm control member for a fuel injection device for

An apparatus for setting the angular relationship between rotating driving, and driven members in the injection pump drive of an internal combustion engine. The driving member and the driven member have a toothed portion of which at least one is a helical toothed portion, whereby the toothed portions are coupled to each other by a coupler member having toothed portions which mesh with the toothed portions of the driving and driven members. At least one of the toothed portions of the coupler member is configured as a helical portion and is hydraulically displaceable with respect to the other toothed portions. This hydraulic displacement is controlled by a centrifugal governor having flyweights. The flyweights displace a valve member against the force of at least one spring in an rpm-dependent manner to effect the rpm-dependent adjustment of the instant of injection. In addition to the rpm-dependent displacement, a load-dependant displaceability, can be superimposed. As a result, the instant of injection can be influenced in accordance with load, in order thus to attain an improved combustion efficiency.

Apparatus for setting the angular relationship between rotating driving,

A centrifugal rpm governor is proposed for fuel injected internal combustion engines in which the full-load supply quantity is precisely settable at a fixed and invariable full-load setting and a predetermined constant pivot angle of the setting member actuated by the service lever. The governor includes an intermediate lever that is coupled with the supply quantity adjustment member of the injection pump, which intermediate lever is engaged both by a control member that is moved by flyweights in accordance with rpm and a setting member pivotable for the purpose of arbitrarily varying the supply quantity. The setting member and the control member both are articulated on the intermediate lever via a shift lever connecting both members, and the intermediate lever is provided with a pivotal bearing adjustable in the governor housing solely for the purpose of accomplishing the basic setting of the full-load supply quantity. The pivotal bearing serves simultaneously as a deflection member in order to prevent an overload of the control rod during an undergoverning situation.

Centrifugal RPM governor for fuel injected engines

A regulator apparatus controlled by spring tension, such as a centrifugal governor for internal combustion engines wherein the spring characteristic of the regulator spring remains unchanged during operation and a regulator effectiveness which remains the same over a long period of time is attainable and which includes at least one compression spring acting as the regulator spring and inserted between two supports as well as an actuation member to transfer those regulator motions which tend to cause a change in length of the spring over onto the first spring end, which actuation member can tilt about a transverse shaft disposed perpendicularly to the longitudinal axis of the spring, the compression spring intentionally inserted into an installed position such that a point on the front face of the appropriate spring end, which point transfers the largest spring force component onto the spring support associated with the tiltable actuation member lies in a plane extending parallel to the longitudinal shaft of the spring and penetrating the transverse axis of the actuation member so that undesired tilting movements of the actuation member caused by the spring force exerted eccentrically on the spring supports are eliminated and the installation position of the compression springs which is in accordance with the invention is fixed by fastening means.

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Stuttgart, Germany

Ernst Ritter