Abstract: Electric current supply to an actuator is ON-OFF controlled in such a manner that fuel supply quantity is made to be zero on condition that an engine rotation speed reaches a rotation speed less than a predetermined one in a low rotation region and a starter switch is turned OFF, whereby overrun of an engine and reckless run of a vehicle are prevented when a rotation sensor is in an abnormal condition.

Abstract: A method and apparatus are provided for controlling the torque or fuel quantity limit to an internal combustion engine such as a diesel engine, at least partly as a function of the sensed level of smoke in the exhaust gas stream of the engine. An open-loop preliminary fuel quantity limit signal is provided as a function of engine speed. The actual smoke level is compared with a smoke limit value for the particular operating condition, and an error signal indicates the sense and possibly the magnitude of any difference. The error signal is the basis of a compensating signal which is added to the open-loop preliminary fuel quantity limit signal such that the resulting fuel quantity limit signal provides for maximum torque without exceeding the smoke limit. The smoke level is obtained by a direct measurement of the particulate level or the like in the exhaust gas stream. An alarm may be provided for indicating when the actual smoke level exceeds some threshold relative to the smoke limit.

Abstract: An engine idle speed control system is described having an integral adjustment of engine idle speed for maintaining a constant engine idle speed independent of load and having load dependent gain characteristics with the integrator adjustment being a measure of engine load.

Abstract: Apparatus for measuring fuel consumption in an internal combustion engine having controllable fuel injectors that meter fuel to corresponding cylinders at predetermined delivery rates under throttle control senses the amount of fuel being delivered to each cylinder by a potentiometer that generates a signal which is proportional to the linear displacement of a throttle rack gear. In one embodiment a transducer generates another signal proportional to the rotary speed of the engine and both signals are amplified at a fixed gain corresponding to the number of working engine cylinders to produce a product signal that is applied to an analog meter or a digital display circuit which indicate the rate of engine fuel consumption.

Abstract: A fuel injection pump serves to inject fuel into an engine. A movable member adjustably determines the rate of fuel injection into the engine. The fuel injection rate depends on the position of the movable member. A critical position of the movable member defines the boundary between a fuel injection enabling range and a fuel injection disabling range. This critical position is measured. An operating condition of the engine is sensed. The movable member is then controlled on the basis of the measured engine operating condition and the measured critical position.

Abstract: In effecting individual cylinder fuel injection control in an electronically controlled diesel engine, wherein rpm variations with every explosion cylinder are detected and compared with one another, the increase or decrease in the fuel injection quantity with every cylinder is learned until rpm variations of the respective cylinders become uniform, and a fuel injection quantity control actuator is controlled with every cylinder, so that engine vibrations due to a dispersion in fuel injection quantity between the cylinders can be controlled, an adaptive correction quantity is determined in accordance with an rpm variation deviation obtained from a difference between a mean rpm variation and rpm variations of the respective cylinders, and the engine temperature or the fuel temperature, and the fuel injection quantity control actuator is controlled with every cylinder in accordance with the adaptive correction quantity, to thereby prevent the divergence of the correction quantity.

Abstract: A system for control of the amount of fuel to be injected in an internal combustion engine uses a high-pressure pump and a fuel control valve mechanism for spill having an electromagnetic valve and an oil-pressure valve. A predetermined delay time is added to the control timing of the current supply to the fuel control valve mechanism for spill, thus achieving the injection of the required amount of fuel at the most appropriate timing.

Abstract: An electronic control system for fuel injection of a diesel engine includes a field of characteristics for a smoke discharge limiter which is controlled either by a field of correction characteristics of charging air pressure in dependency on signals derived from sensors of operational parameters of the engine, or alternatively by a simulation unit operating without the use of sensors. The decision whether or not the control and/or regulation of the diesel engine is to be made in dependency on sensors is made by an evaluation circuit which evaluates operational condition of the engine, for example by means of a plausibility interrogation.

Abstract: A device is proposed for controlling the injection start to a set-point value dependent on operating parameters, in which the period of time between the appearance of an injection start signal and a reference marking (for instance, a top-dead-center signal) is counted out and the result of counting is compared with the set-point value. To avoid malfunctioning, the triggering of the counting process is possible in only one, predetermined crankshaft angle range. Various values are provided for the counting-out frequency. In the exemplary embodiment they are within the range between 50 and 200 kHz. In case of failure, a control of injection onset is effected, and as needed, a limitation of the fuel quantity as well--for instance to 70% of the respectively determined quantity.

Abstract: In an electronically controlled governor having an electronic actuator for positioning a fuel adjusting member, a warming-up current is supplied to reduce the operational resistance of the electric actuator when an auxiliary device for the starting of the diesel engine is executed, whereby the resistance due to the viscosity of the oil in the actuator is reduced by the temperature rise of the actuator caused by the warming-up current.

Abstract: A fuel injection system, especially for air-compressing, spontaneous ignition reciprocating piston internal combustion engines. At least one parameter which characterizes the injection process, such as beginning and duration of the injection, is adapted to be regulated by at least one electromagnetic control valve per cylinder unit which can be controlled by an electrically operating data processor as a function of characteristic operating parameters of the internal combustion engine. In order to compensate for transmission deviations of the electromagnetic control valves caused by wear and operation, the control pulses of the data processor are transmitted to each electromagnetic control valve via a suitable circuit in such a way that the control valve opens and/or closes with a constant time delay during each control procedure. The constant time delay of the control valve can be established as a function of the actual speed of the internal combustion engine.

Abstract: A gas-diesel dual fuel engine operative with both a gaseous fuel and a diesel fuel oil. The engine has an electronic governor circuit adapted to receive both a speed signal representing actual speed of engine and a set speed signal representing a predetermined command speed of the engine, electric actuators adapted to actuate a diesel fuel injection pump and a gaseous fuel regulating valve, respectively, in response to the signal from the electronic governor circuit, and a mode switching control circuit connected to the electronic governor circuit and adapted to switch the operation of the electric actuators between a diesel fuel operation mode and a gaseous fuel operation mode.

Abstract: A fuel injection pump for internal combustion engines is disclosed, in which a profiled governor rod of a supply quantity adjusting member, the latter controlled by a final control element, is extended at its end toward the final control element out of the pump housing and is supported in a displaceable manner at the point where it emerges. For the sake of sealing the support point, a cylindrical slide bearing sheath is secured in the pump housing at the location where the governor rod emerges from the pump housing. A cylindrical governor rod guide means which is joined to the profiled governor rod and closes it off or surrounds it in a sealing manner is guided displaceably, with the least possible play, in the slide bearing sheath.

Abstract: In a fuel injection system incorporating a distribution type fuel injection pump, wherein the amount of fuel in each fuel injection is controlled by the time duration from the stoppage to the resumption of the venting or spilling of the pumping chamber, the time duration is electronically calculated according to engine rotational speed and accelerator pedal opening amount as a rotational angle of the crankshaft.

Abstract: In a fuel injection pump, an engine drives a rotary plunger having an axially extending bore connected to a compression chamber, plural fuel inlet ports alignable with an inlet passage for introducing fuel to the compression chamber, fuel distribution ports for distributing the compressed fuel through the bore to each one of the fuel delivery passages and plural spill ports. A spill-port timing control unit is provided comprising a stator core, a coil wound on thereon, a magnetized ring having a spill groove, and a spring for resiliently maintaining the ring in a reference angular position with respect to the stator core. The magnetized ring is mounted on the plunger so that it can rotate from the reference angular position to an angularly displaced position in proportion to the magnetic flux of the coil to align the spill groove of the ring with each spill port of the plunger to create a passageway through which the compressed fuel is allowed to escape at the termination of fuel injection.

Abstract: In effecting individual cylinder fuel injection control in an electronically controlled diesel engine, wherein rpm variations with every explosion cylinder are detected and compared with one another, and a fuel injection quantity control actuator is controlled with every cylinder so as to make the rpm variations of respective cylinders uniform, so that engine vibrations due to a dispersion in fuel injection quantity between the cylinders can be controlled, a movement value corrected driving command timing to the fuel injection quantity control actuator is determined in accordance with a difference between individual cylinder correction quantities of last time and this time and a driving command is given to the fuel injection quantity control actuator with every cylinder in accordance with the movement value corrected driving command timing.

Abstract: The governor device includes an electromagnetic clutch capable of utilizing the driving force of a diesel engine for driving a control rack of fuel injection pumps. The electromagnetic clutch is controlled based on the difference between a preset engine speed and an actual speed. With this device, electrically controlled governor operation can be executed without use of an electric actuator such as a solenoid or the like.

Abstract: For the electronic control system of a Diesel injection system a smoke pulse limitation device is proposed, so that even during dynamic operational conditions the exhaust gas clouding does not exceed unwanted high values and without requiring sensors for the direct or indirect determination of the amount of air aspirated per cylinder stroke. For this purpose there are proposed a delay element for a signal giving the desired amount of fuel as well as a real differentiator in a rpm signal processing branch. Finally, by way of a performance characteristic data storage for the smoke pulse limiter, maximally permissible fuel amount values are determined.

Abstract: An air-compressing fuel injected internal combustion engine which includes a fuel injection pump for supplying predetermined quantities of fuel to the engine in response to a positioning of a control rod. A load lever is operatively connected with an accelerator pedal and a governor is operatively connected to the fuel injection pump for controlling a positioning of the control rod in dependence upon a rotational speed of the engine. An idling spring is operatively connected with the governor for regulating the position thereof and the idling spring is pretensioned as a function of the rotational speed by an independent idling control arrangement so as to control an injection quantity of the fuel by the fuel injection pump in accordance with an actual idling rotational speed of the engine.

Abstract: A fuel injection arrangement for a diesel engine. An overflow passage for high pressure fuel is provided in the engine's fuel injection pump. A solenoid valve is disposed in the overflow passage for controlling the fuel injection amount through its on-off operation. The time when the fuel injection pump starts injecting fuel is detected by an injection start detector. To this injection starting time point is added a target injection period to determine an injection end time. At this injection end time the solenoid valve is opened to discontinue the fuel injection. The target injection period is determined according to operating conditions of the engine. Since this apparatus detects the actual injection start point and controls the injection period on the basis of the result of the detection, the fuel injection amount can be controlled extremely accurately.

Abstract: A control system for an internal combustion engine which has a driving-pedal position transducer, a subsequent performance graph apparatus for control values and a control device responding to these values. A delay element is provided in series with the performance graft apparatus between the driving-pedal position transducer and the control device. The purpose of the control system is to adapt the mode of response of the control device (a throttle valve, for instance, in an Otto engine or the regulator rod in a Diesel engine) to various operational states. Of special significance are rpm, the position of the driving pedal, and the change in driving-pedal position. The proposed system is efficaciously realized by means of a computer.

Abstract: In a characteristic signal generator for producing a characteristic signal determined from a characteristic curve for the maximum amount of fuel to be injected into an internal combustion engine from an electronically controlled fuel injection pump, the generator has a memory in which a plurality of sets of characteristic data each representing a characteristic curve for the maximum amount of fuel to be injected are stored, and the necessary data is read out from the memory in response to the data relating to the engine speed at each instant.

Abstract: A method and apparatus for controlling fuel to be supplied from a motor-driven fuel pump to fuel injection valves of a fuel injected engine, the time period during which the fuel injection valves are kept open and the power duty cycle for driving the fuel pump motor are both calculated by a microcomputer responsive to one or more engine operating conditions. Reduced power consumption of the pump motor is achieved, thus resulting in reduction in the load applied to the battery and therefore improving the fuel consumption rate. The apparatus comprises an input unit, an injector drive unit, and a pump drive unit in addition to the microcomputer, and includes circuits for converting both the time period and the power duty cycle according to the battery voltage and the degree of engine acceleration.

Abstract: In effecting individual cylinder fuel injection control in an electronically controlled diesel engine, wherein rpm variations with every explosion cylinder are detected and compared with one another, and a fuel injection quantity control actuator is controlled with every cylinder so as to make the rpm variations of respective cylinders uniform, so that engine vibrations due to a dispersion in fuel injection quantity between the cylinders can be reduced, the individual cylinder correction quantity of the fuel injection quantity control actuator is determined in accordance with a deviation in the rpm variation obtained from a difference between a mean rpm variation and rpm variations of respective cylinders, the upper and lower limit guard values of the individual cylinder correction quantity, the values being variable in association with a range, which the fuel injection quantity control actuator can follow up, is determined in accordance with engine temperature or fuel temperature, and the fuel injection quan

Abstract: A method of controlling a hydraulic actuator which controls the rotational phase angle of the fuel injection pump for the automobile. A satisfactory exhaust gas composition and an appropriate fuel consumption during a warm-up period of the engine are achieved when the oil temperature in the hydraulic actuator is low. The control method for the hydraulic actuator includes the steps of detecting the temperature corresponding to the oil temperature, comparing the detected temperature with the predetermined reference temperature, and making the application period of the command pulse signal for driving the hydraulic actuator longer than the predetermined length when the detected temperature is lower than the predetermined reference temperature.

Abstract: For a speed governing system for an internal combustion engine with self-ignition, which includes an electromagnetic final control element for influencing the injection quantity and a control unit having a governor for controlling the final control element, provisions are proposed which give the governor a high dynamic amplification in the range of a drop in the engine rpm, a dynamic amplification that drops from a higher value to a lower value in the range of a sudden drop of engine speed, that is, an rpm undercutting, and a flattened governor characteristic in the vicinity of the ends of the control range. A governor of this kind reacts very flexibly to changes in rpm and in particular does not enter a saturated state, and it adjusts to a new control state without disruptive reacceleration phenomena. A governor of this kind is particularly well suited for motor vehicles having a Diesel engine with a relatively large number of cylinders.

Abstract: A governor system for the fuel pump of a road vehicle includes a governor of the all-speed type and means is provided to vary the characteristic of the governor in the intermediate speed range in accordance with the load on the vehicle.

Abstract: A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a pump having a body and a solenoid operated fuel control device. The current flow to the solenoid is controlled by a control circuit mounted on circuit boards located within an inner casing secured to the body. An outer casing surrounds the inner casing and defines a space which is connected with a fuel inlet, the space communicating with a fuel inlet of the pump. The flow of fuel through the space assists the cooling of the components of the control circuit.

Abstract: In an electronically controlled fuel injection apparatus which is controlled in accordance with the signal from a sensor for providing a signal concerning the operational condition of the associated engine, there are provided a generator for generating a stand-by signal by which the apparatus is able to continue the control operation thereof without the normal output signal from the sensor and a switching circuit for applying the stand-by signal instead of the signal from the sensor to a control section for electronically controlling the apparatus in response to detecting the occurrence of trouble in the sensor.

Abstract: A fuel injection control device suited to use in automotive diesel engines. The device comprises sensors for producing signals upon sensing various states of operation of the engine, including a temperature sensor adapted to produce a temperature signal upon sensing the temperature of a coolant for cooling the engine, a first arithmetic operation means for determining the rate of fuel injection in accordance with the signals delivered by the sensors, and a second arithmetic operation means for determining the timing of fuel injection in accordance with the signals delivered by the sensors.

Abstract: To provide for accurate alignment of a housing (10) retaining a fuel injection element (12, 15), and a second housing (23) retaining a control element controlling a function of the fuel injection element, in which the relative positions of the pump housing (10) and of the control element housing (23) are determinative of adjustment and alignment of interengagement between the injection element and the control element, the two housings are provided with attachment screws to attach them securely together, while permitting respective removal, for example for replacement of a sealing gasket (26), and to insure precisely aligned re-assembly, the housings include position locating means (27-34, 35') such as interengaging projection-and-recess means (40, 50, 60, 70, 80, 90, 100, 110; 37, 47, 57, 67, 77, 87, 97, 107) which accurately position the housings with respect to each other, and which are positionable after the housings have been first assembled and aligned to provide for said adjusted and aligned interengage

Abstract: An otherwise conventional fuel supply system of the type that includes an engine driven distributor type fuel injection pump operatively connected to a diesel engine is modified so as to include a normally closed solenoid actuated valve means operatively associated with the inlet passage means of the pump in a location between the transfer pump of the pump and the injection pump means of the pump; an adaptive torque balancing electronic controlled electric power source being connected to the solenoid actuated valve means, whereby the solenoid actuated valve means is operative to supplement the metering valve control of fuel flow from the transfer pump to the injection pump means whereby the fuel flow to the injection pump means and from the injection pump means to each of the respective injection nozzles for each of the cylinders is controlled as a function of engine operation and the incremental speed difference per preselected degrees of movement among the respective cylinders of the engine.

Abstract: A fuel injection pump for internal combustion engines in which by means of an obliquely extending control groove on the jacket face of a distributor, the end of injection can be varied by opening a relief conduit during the displacement of the distributor. The injection onset is made to follow this variable end of injection by providing that the stroke position of the pump pistons of the fuel injection pump is ascertained at the end of injection by a transducer, by means of which at the same time a metering duration of a magnetic valve that has already been opened at the time of the end of the injection stroke is controlled. In this manner, with a radial piston pump so embodied, the opportunity is afforded of accurately adjusting the quantity of fuel to be metered by means of a magnetic valve, even with variable injection times. All that needs to be done is that the magnetic valve be closed exactly and rapidly at the end of metering, while an error in opening on the part of the magnetic valve does not occur.

Abstract: Disclosed a regulating device for a fuel volume adjuster of a self-igniting internal combustion engine. In order to damp jerking movements resulting at different power transmissions, a signal corresponding to the actual rotary speed of the engine is fed back into an electronic regulating circuit. Preferably, the feedback path includes a phase shifter. It is essential that the regulating action of the rotary speed be not delayed by the phase turning shifter. For this purpose, the electronic regulating circuit includes a PI stage and the fed back signal is applied to the regulating circuit only after its I-constituent has become effective.

Abstract: Fuel is periodically injected into an engine combustion chamber by a first injection device as an engine crankshaft rotates. A timing control device serves to adjust the timing of fuel injection effected by the first injection device with respect to the rotational angle of the crankshaft. Fuel is also periodically injected into the combustion chamber by a second injection device as the crankshaft rotates. Adjustment of the timing of fuel injection effected by the first injection device results in variation of the total fuel injection rate characteristic curve with respect to the rotational angle of the crankshaft.

Abstract: A fuel injection pump serves to periodically inject fuel into an internal combustion engine. A movable control member serves to determine the quantity of fuel injected during each fuel injection stroke in accordance with the position of the control member. A permanent magnet is movable together with the control member. A stationary magnetically-permeable member serves to conduct magnetic flux generated by the permanent magnet. The magnetic flux conducted by the magnetically permeable member depends on the position of the control member. A Hall element unit serves to sense the conducted magnetic flux and generate a first signal indicative of the actual position of the control member. A second signal indicates a desired position of the control member. A device, responsive to the first and second signals, serves to adjust the actual position of the control member to the desired position thereof.

Abstract: An electric control device in the form of a final control element for fuel injection pumps for internal combustion engines is protected in the interior of its housing from having the parts it contains inundated by lubricant originating in the interior of the injection pump. This protection is effected in that a suction device driven by the camshaft is disposed in the interior and aspirates lubricant originating in the injection pump and returns it then. The suction device has a rotating part driven by the camshaft, and at its lowest point in the sump it has a sliding shoe which under spring pressure rests at the rear on the rotating part and is so embodied that lubricant adhering to the rotating part reaches a gap and from there is transported back into the injection pump via a drainage hose containing a check valve.

Abstract: A method of detecting the timing of fuel injection in a diesel engine for the regulation of the timing of fuel injection by a fuel injection timing regulator is disclosed. Rotation angle indicating lugs are provided on the crankshaft of the engine connected to the input shaft of the fuel injection timing regulator and on the output shaft of the fuel injection timing regulator to measure the time difference between pulses corresponding to the lugs on the input and output shafts making relative rotation, and a reference rotation angle indicating lug is provided adjacent to each of the lugs provided on one of the input and output shafts to measure the reference timing difference between pulses corresponding to the lugs on the shaft under rotation. The phase angle of the output shaft relative to the input shaft can be accurately calculated on the basis of the former and latter time differences.

Abstract: The fuel injection quantity of a fuel injection apparatus provided with a fuel injection pump is electrically regulated by means of the opening duration of a metering valve. Additionally, a shift in the instant of supply onset controlled in accordance with operating characteristics is attained by means of a change in the return-flow fuel quantity, which is diverted into a refill reservoir and then refilled completely into the pump work chamber by the beginning of the next subsequent injection stroke. Serving as the sole connection between the refill reservoir and a pump work chamber is an overflow conduit, which is opened by two control locations on the pump piston at the end of a supply and shortly prior to the bottom dead center. Both the pump cylinder with the pressure valve and the refill reservoir and the metering valve are inserted in a leak-fuel-proof manner in a cylinder head of the pump housing, which is embodied in two parts.

Abstract: A pair of solenoids are disposed coaxially with and around a hollow cylindrical cut-off valve. The valve includes an inner non-magnetic sleeve and an outer permanent magnet sleeve. The cut-off valve slidably engages a fuel distributing plunger which injects fuel according to its axial reciprocation. The cut-off valve controls fuel injection quantity via timing of exposure of a fuel injection cut-off port in the plunger. When the pair of solenoids are energized in accordance with operating parameters of the engine, the cut-off valve is moved to a corresponding position along the plunger. A sensor senses the actual position of the cut-off valve for feedback control thereof. A pair of disc-like permanent magnets may be disposed opposite either extreme of travel of the cut-off valve in spaced relationship thereto. A pair of non-magnetic discs may be disposed in place of the pair of disc-like permanent magnets.

Abstract: The fuel injection quantity of a fuel injection apparatus provided with a fuel injection pump is electrically regulated by means of the opening duration of a metering valve. Additionally, a shift in the instant of supply onset controlled in accordance with operating characteristics is attained by means of a change in the return-flow fuel quantity, which is diverted into a refill reservoir and then refilled completely into the pump work chamber by the beginning of the next subsequent injection stroke. Serving as the sole connection between the refill reservoir and a pump work chamber is an overflow conduit, the overflow opening of which, located at the discharge location into the pump work chamber, is opened by two control locations on the pump piston at the end of supply and once again shortly before bottom dead center.

Abstract: An adjusting device in a fuel injection pump including a pivotable lever with a stop on one end which limits the movement of a quantity adjusting device counter to a spring force, a stepping motor including an adjusting device which actuates said lever for adjusting said stop which limits movement of the quantity adjusting device.

Abstract: The invention relates to a coupling means between an output control member of an internal combustion engine, in particular for automotive vehicles, and an actuator member, which coupling means in the range of small actuations of the actuator member does not open the output control member at all or only slightly, and only at larger actuations does it open the output control member in a noticeable fashion and thereafter moves it into a full-load position. Such a coupling means makes possible an enlarged operative range for a control device which controls the output control member in dependency of the position of the actuator member and at least one operating parameter of the internal combustion engine in a range lying between the full-load position and the minimum opening position determined by the given position of the actuator member.

Abstract: In a method and apparatus for controlling the fuel metering for an internal combustion engine, an electrical displacement sensor is used for fuel injection pumps with an injection quantity control element, which is adjusted, via a control lever, proportionally to the electrical displacement sensor, whose displacement change causes an electrical signal proportional to this displacement change, this electrical signal being fed into an electronic control unit for readjusting the injection quantity control element.In order to avoid supply quantity scatter, control can be directed towards a calibration point situated on a supply quantity characteristic of the fuel injection pump, this calibration point preferably being located in the region of the maximum fuel supply quantity, and the output voltage of the electrical displacement sensor can be compared with a specified required value.

Abstract: In a diesel engine having a rotational angle sensor for detecting the engine speed, when the rotational angle sensor is in an abnormal state, a fuel-cutting operation is performed. A first fuel-cutting operation is immediately performed so as to indicate to the driver that an abnormal state exists. However, subsequent fuel-cutting operations after restarting of the engine are delayed as compared with the first fuel-cutting operation.

Abstract: A regulating device for controlling the position of an electromagnetic final control element, in particular in an internal combustion engine having self-ignition. The device includes a measurement value receptor as well as at least one regulating circuit having a non-linear characteristic which is influenced by its output and/or input signal. In addition to a proportional component, the non-linear regulating circuit may include an integration component and a differentiation component. The setting of at least the proportional component is varied, preferably in accordance with the deviation, so that in particular small deviations of the output and/or input signal are amplified to a greater extent than are larger deviations. In this manner, an extremely sensitive and precise regulation is attained.

Abstract: A control system for a fuel supply pump of the kind having first and second valves to control the timing of fuel delivery and the quantity of fuel supplied includes a governor circuit for controlling the operation of the valves, a transducer which provides a signal representing the amount of displaceable fuel in the pump at the end of the filling stroke. The control system includes means for processing the signal provided by the transducer to take account of the engine speed so that the valve is open for the correct length of time.

Abstract: An electronic control device is proposed for a Diesel fuel metering system, in which at the onset of the starting procedure, a constant fuel quantity is pre-specified at first, and this quantity subsequently increases in steps or in a ramp-like manner. Above a predetermined rpm or starting quantity, an rpm-dependent reduction in quantity takes place, to 90% of the full-load quantity. The open-loop or closed-loop control of the starting quantity ends upon the attainment of a speed of 800 rpm, for example. Both an analog and a computerized realization of the control device are provided, and the control device according to the invention is capable of dispensing with the processing of a temperature signal and can thus dispense with the use of one temperature sensor.

Abstract: A method of adjusting a plurality of fuel injection units associated with respective cylinders of a multi-cylinder diesel engine having a crankshaft operatively connected to all said cylinders is provided. Each of said fuel injection units comprises a fuel injection nozzle, a fuel injection pump connected to said nozzle and operable to discharge fuel therethrough, drive means for driving said pump, a housing accommodating said nozzle, said pump and said drive means, a capacity control element for controlling the capacity of said pump, and a timing control element for controlling the time at which said pump begins to discharge fuel through said nozzle.

Abstract: A fuel system for a multi-cylinder engine comprises a plurality of engine operated pumps supplying fuel to the injection nozzles respectively of an engine. Each pump has an electromagnetic valve which must be closed to cause delivery of fuel by the respective pumps. The supply of power to the windings of the valves is effected by a power module controlled by a distributor circuit which receives sequence signals to ensure that the valves are closed at the correct time and a fuel level signal to ensure that the valve is closed for the correct length of time. In order to ensure that the amount of fuel delivered through each nozzle is the same a sensor provides a pulse signal at each working stroke of the engine. The period between each signal is determined by a timer circuit and the average of a number of periods is obtained from an averaging circuit. The average period is compared with the actual value and any error is used in a compensating circuit 29 to adjust the time the respective valve is closed.