Abstract: An electrical control system for a paving machine uses a linear actuator to control the speed of an internal combustion engine between a low idle condition, a full speed condition and an economy speed condition. The control system includes electrical circuits responsive to the activated or deactivated condition of propulsion system on the machine, the activated or deactivated condition of work implement systems on the machine and an operator selected activation switch on the machine.

Abstract: In one aspect of the present invention a method is disclosed that controls the pressure of actuating fluid supplied to a hydraulically-actuated injector. A target time duration in which fuel is to be injected is determined, and compared to the actual time duration to determine a desired actuating fluid pressure in order to control the fuel injection rate.

Abstract: A fuel injection timing control device includes a lift sensor for detecting a lift amount of a needle valve of a fuel injection nozzle, rectangular wave conversion means for converting an output signal of the lift sensor to a rectangular wave with a predetermined threshold level, and ignition point calculating means for calculating a timing for actual fuel ignition on the basis of the converted rectangular wave in accordance with a driving condition of the internal combustion engine, wherein the fuel injection control is performed on the basis of the calculated ignition timing.

Abstract: Method and apparatus for testing diesel engine governors away from an engine on a test bench, including an electric drive for driving a governor and an associated fuel pump at a variable speed rate which variable speed rate is controlled with an electrical signal generated by a transducer connected to the governor. The signal is applied to the drive through a feed back loop. In this manner variations in the governor output control the drive and consequently the fuel pump delivery rate in a manner that realistically simulates the actual performance of the governor when the governor and fuel pump are mounted on a diesel engine.

Abstract: A control system for operating two engines (3, 4) is installed on a construction machine, such as a hydraulic shovel, to provide for the operation of either engine or both of the engines, to improve operability and to reduce the stress on the operator. The control system has a governor controller (5, 6) for each engine, a dial potentiometer (1) for providing a throttle signal representing the desired revolution rates of the engines from a low speed to a high speed, and a selector switch (2) having a plurality of control positions (F, N and R) for selecting an individual engine or a combination of the engines.

Abstract: An engine control is provided for compensating the fuel delivery to an internal combustion engine as a function of the energy content of the fuel. The engine control includes a fuel temperature sensor connected to an electronic controller. A memory device including a standard fuel delivery map stored therein is connected to the electronic controller. The electronic controller calculates a compensated fuel delivery map as a function of the standard fuel delivery map and the fuel temperature, and the controller issues a fuel delivery command based on the compensated fuel delivery map.

Abstract: Methods of operating a locomotive engine to maintain power and speed under conditions of air starvation, as in high temperature tunnel operation, include varying engine load instead of fuel rate to maintain set engine speed when operating at (1) excessive engine exhaust smoke levels or (2) under conditions where increasing fuel rate fails to increase engine power. Normal speed control by varying fuel rate is maintained under other operating conditions. Application to turbocharged two cycle diesel engines is particularly indicated.

Abstract: A fuel system for an engine (10) has a transducer (16) which supplies an input signal to an electronic fuel control system (15) representing driven demand. A variable gain amplifier (19) modifies the signal applied to the control system and is controlled by a load sensor (20) which detects when a suddenly applied load is placed on the engine such as when an air conditioning compressor (18) is brought into operation or when the power output of the alternator (17) is suddenly increased.

Abstract: An engine fuel injection system is provided, wherein pumping maximum possible fuel required by the engine and by-passing excess fuel not used by the engine are eliminated, the speed of the variable speed electric fuel pump for the system being controlled so as to pump only the quantity of fuel required to operate the engine under certain sensed engine and/or ambient operating conditions, such control being provided by a fuel pressure sensor/electronic pump motor speed control.

Abstract: A method for diagnosing an engine (102) including the steps of sensing a first set of parameters of the engine (102) and determining a modeled value of a first operating characteristic. A second set of parameters of the engine (102) is sensed and used to determined a modeled value of a second operating characteristic. The modeled values are compared to actual values and the engine is responsively diagnosed.

Abstract: An actuator for moving a solenoid armature to control fuel in response to a control current is built into a fuel pump, with trapped air in and around the actuator preventing contamination of the actuator by ferromagnetic particles in the liquid fuel from the fuel pump.

Abstract: An apparatus for controlling fuel injection parameters for fuel injection quantity, injection timing, and actuating fluid pressure of a hydraulically-actuated electronically-controlled fuel system. The apparatus utilizes signals indicative of actuating fluid pressure (P.sub.f) and/or actuating fluid viscosity (v) in order to determine such parameters.

Abstract: An electronic governor of a fuel supplying device for an engine is disclosed. The governor is operated to control an adjustment member for adjusting an amount of supply of fuel to the engine. In a target idling position arithmetic circuit, a primary arithmetic circuit calculates a primary target position of the adjustment member in accordance with the detected rotational speed of the engine with reference to a predetermined relation between the rotational speed of the engine and the position of the adjustment member where the supply amount of fuel is reduced as the rotational speed of the engine is increased. A first correction circuit corrects the primary target position by using a first position correction component in a fuel supply amount increasing direction, such that the detected rotational speed of the engine is coincident with a target idling rotational speed.

Abstract: A governor system for the fuel pump of an engine which drives a vehicle through a multi ratio gearbox includes an all speed governor. The governor characteristic in the intermediate speed range is modified by means responsive to the load on the vehicle and by means responsive to the transmission ratio of the gearbox.

Abstract: A method and apparatus for limiting the fuel to an internal combustion engine to reduce emissions of the engine. Means responsive to one or more operating conditions of the engine are provided for adjustably setting the maximum open position of a throttle of the engine so as to reduce and limit the maximum fuel volume flow rate to the engine. The operating conditions include the fuel flow rate called for by an accelerator, the condition of the transmission of a vehicle in which the engine is installed, the slope or incline on which the vehicle is located, the vehicle speed, and the speed and direction of any wind.

Abstract: A method for operating an closed-loop control system for injecting fuel into an internal combustion engine, with the control system having an error correcting capability for deviations that occur in the control signal being processed by the control system, and with the control system having a controlling element, which is embodied as a precontrol, PI-controller that are operated in parallel, and a non-volatile memory for storing deviation signals.

Abstract: In an engine speed controlling method in a PI isochronous control mode, the initial value of an integral term for PI control is determined when the difference between a given target engine speed and an actual engine speed becomes more than a prescribed level, and the value of the integral term is change to the value of a no-load rack position at which the target engine speed is maintained in no engine load condition, when the actual engine speed becomes equal to the target engine speed, whereby large overshoot and undershoot can be effectively suppressed.

Abstract: Disclosed is an automatic power regulator for controlling an induction type biogas generator via an electrically controlled governor. The biogas generator is directly coupled with a commercial AC power network. The regulator controls the power output of the generator to follow the power consumption of a load according to the difference between the power output and the power consumption. Positive and negative references are set to avoid oscillation of the system.

Abstract: A method and an arrangement for open-loop control and/or closed-loop control of an operating variable of an internal combustion engine is suggested with a transfer element fixing the relationship between input and output variables in the form of a characteristic curve or characteristic field such as an electrically actuable actuator, which directly or indirectly influences the operating variable of the engine of a motor vehicle and which fixes the relationship between the driving and operating variable or a variable influencing this operating variable in the form of a characteristic curve or a characteristic field. The transfer element or the characteristic curve or the characteristic field is subjected to changes. By adapting the characteristic curve or the computation instruction representing the characteristic curve or the characteristic field, these are adapted to these changes.

Abstract: The invention relates to a system for controlling an internal combustion engine (100), in particular a self-igniting internal combustion engine. A signal (U) for triggering a performance-determining final controlling element (105) is stored in a characteristics map (110) for each of a corresponding fuel quantity (QK) to be injected into the engine. The signal values stored in the characteristics map (110) are then corrected in dependence upon a predetermined relationship of a signal corresponding to the value for the fuel quantity (QK) to be injected and a signal corresponding to the value for the actually injected fuel quantity (QKI).

Abstract: A rotational speed control system for controlling the number of revolutions of an engine through remote control of rotation of a governor lever. This rotational speed control system includes a stepping motor for rotating the governor lever, lever position sensor switches for detecting abutment of the governor lever against stoppers, respectively, a pulse counter, and a controller. The controller is adapted to store a count value of the pulse counter as a renewable reference value when the position sensor switches are turned on, to carry out the rotational speed control of the engine and necessary preadjustments according the reference value.

Abstract: In a device for adjusting the injection timing in a diesel engine fitted with EDC, a basic value (SBGWs) of injection timing for operation in the static or steady state is stored in a first characteristic field (20) and a basic value (SBGWd) for operation in the dynamic or unsteady state such as acceleration and deceleration is stored in a second characteristic field (22). These basic values are dependent on desired injected fuel quantity (Q) and engine speed (n). The characteristic field (20) for the static state is designed empirically or otherwise to optimize fuel consumption whereas the characteristic field (22) for the dynamic state is designed for minimum pollutant emission. A gradual changeover from one mode to the other is achieved by the gradual change of a multiplying factor (c) from 0 to 1 or vice versa responsively to dQ/dt departing significantly from zero or becoming zero.

Abstract: A manual adjustment device permits emergency operation of a vehicle if a stepping motor that normally adjusts the position of a setting member between two limit positions becomes inoperative due to an electrical malfunction. The rotor shaft (19) of the stepping motor (3) is provided with teeth (29). A pinion (31) can be brought into engagement with the teeth (29) against the force of a coil spring (35). The pinion (31) is disposed inside the stepping motor housing (17) and is mounted on an adjustment shaft (33) that extends through an opening in the housing (17). A manual adjustment element (51; 105) is disposed outside of the housing (17) and is connected to the adjustment shaft (33). The manual adjustment element (51; 105) can be manipulated to press the pinion (31) into engagement with the teeth (29) and to then rotate the rotor shaft (19).

Abstract: A hydraulic-controlled electronic governor employed in a fuel injection system is provided with a proportional pressure-reducing solenoid valve (10) capable of conducting a self-regulation of an input hydraulic pressure supplied from a hydraulic pressure source (30). Such pressure-reducing solenoid valve (10) is connected with a control rack (25) for controlling an amount of fuel injection, while interposed between the hydraulic pressure source (30) and a pressure input chamber (28) of a power piston/cylinder mechanism (22) for controlling the control rack (25), so that the input hydraulic force acting on one side of the piston (24) of the power piston/cylinder mechanism (22) balances the resilient force of a return spring (27) acting on the other side of such piston (24) so as to control the control rack (25) in its position.

Abstract: A rotational speed control system for an internal combustion engine capable of preventing a dead time or dead section from occurring in controlling of a rotational speed of the engine. An integrating circuit is controlled by means of an output of a comparator for comparing a rotational speed detection signal with a target rotational speed setting signal, to thereby obtain an integral voltage which falls and rises when the rotational speed detection signal is above and below the target rotational speed setting signal, respectively. Comparison of the integral voltage with a sawtooth signal voltage leads to a pulse signal subjected to pulse width modulation. The pulse signal is fed to an actuator driving circuit to carry out on-off controlling of a drive current for the actuator. Connection of voltage limiting circuits to the integrating circuit causes a variation of the integral voltage to be limited within a range of amplitude of the integral voltage, to thereby eliminate the dead time or dead section.

Abstract: An automatic control system for a friction-encumbered signaling device (50) in a motor vehicle with the system including a first automatic controller (10) that compares an actual signaling-device position (UI) to a desired signaling-device position (US), with the first automatic controller being capable of calculating at least one input variable for the two-step action controller (40) that is connected to the load side of the first automatic controller, and the two-step action controller (40) including the capability for determining a variable hysteresis width E which is dependent upon system operating parameters.

Abstract: A system for avoiding the effects of jerking in the drive train of a motor vehicle driven by an internal combustion engine, comprising a device for limiting the quantity of fuel supplied to the combustion chambers of the engine controlled with the aid of a transducer for measuring the approach of two coupling parts of a coupling mounted in the drive shaft to the gearing system of the motor vehicle. If a value of a predetermined approach speed is exceeded, then the drive torque output by the engine is reduced, by reducing the fuel quantity, such that the coupling parts come into contact gently with one another. After that, the output torque of the engine can be further increased arbitrarily.

Abstract: A fuel injection device includes an actuator for positioning an adjusting member to establish a fuel injection level. A correcting device such as a resistor is provided to compensate for any positional deviation of the adjusting member during assembly of the fuel injection device. A value of the correcting device is read and compared with an actuator correction value previously stored in a read/write memory such as an E.sup.2 PROM. If the value of the correcting device is within normal parameters and differs from the prestored actuator correction value, the prestored actuator correction value is overwritten using the value of the correcting device to obtain a new stored actuator correction value. The actuator correction value stored in the read/write memory is used to correct the position of the adjusting member.

Abstract: Fuel injection pump for internal combustion engines comprising a displacement pickup for determining the position of control elements arranged in a pump housing. The displacement pickup comprises a movable part, which is arranged in the pump housing and is connected with the control element, and a stationary part which is arranged on the outside of the pump housing. The position of the movable part of the displacement pickup is determined by the stationary part by means of a measuring process which measures in a contactless manner, e.g. by means of the induction or eddy current principle.

Abstract: A position sensor for a valve or the like includes a first electrode disposed about the valve or a member associated therewith in a manner that the interfacial area betwen the valve and the electrode remains constant irrespective of the position of the valve. One or more second electrodes are disposed in a manner that the interfacial area between the valve and the electrode varies with the position of the valve. By sensing the change in electrostatic capacity between the electrodes the position of the valve may be detected. The sensor finds application in a fuel injection pump wherein it permits a very compact solenoid (motor)/sensor arrangement.

Abstract: A fuel injection pump for internal combustion engines having a supply quantity adjusting device, in which a full-load stop for the quantity adjustment can be varied by the imposition of a stepping motor, and in which idling rpm governing is possible. The adjusting device has a tensed drag lever group, which acts as the stop lever for the stepping motor. If the stepping motor should fail in the idling position, emergency operation is possible by overpressing the drag lever.

Abstract: A fuel injection pump for internal combustion engines having a fuel injection quantity adjusting device, in which by the imposition of a stepping motor and by varying a spring assembly at the adjusting device, not only can the starting and full-load injection quantities be controlled but the idling injection quantity can also be regulated as a function of engine operating parameters.

Abstract: The invention is based on a fuel injection pump having an adjuster, actuatable via an adjusting mechanism; the adjusting mechanism has an adjusting piston which is displaceable in a cylinder and is adjustable counter to a restoring force by a pressure fluid. The delivery of pressure fluid to the adjusting piston is controlled via electric valves, and by means of various geometrically defined adjusting piston positions, exact injection adjustment is possible without requiring technically complicated feedback sensors on the adjuster.

Abstract: The invention is based on a fuel injection pump in which an adjuster, which may also be an injection onset adjuster, is actuated via an adjusting mechanism, and the adjusting mechanism has an adjusting piston, which is displaceable in a cylinder and is adjustable counter to a restoring force by a pressure fluid. The delivery of pressure fluid to the adjusting piston is controlled via electric valves, making a graduated, geometrically defined adjustment of the adjusting piston possible, but no feedback sensors for the actual status of the adjusting mechanism at a given time are required.

Abstract: A distributor type fuel injection pump has a rotary magnet regulator (15) to actuate a control member (14) determining the fuel injection quantity, which rotary magnet regulator (15) is driven by a regulating signal produced in dependence on the operational parameters of the internal combustion engine. The rotary magnet regulator (15) is accommodated in a chamber (16) forming part of the pump housing (17) and filled with fuel. A damping device (25) is provided for the purpose of avoiding rotary oscillations of the rotating armature (20) in the rotary magnet regulator (15), which damping device (25) consist of a paddle (26) fixed firmly to the rotating armature (20) and of two separating walls (27,28) provided in the chamber (16). The paddle (26) extends radially from the rotating armature (20) and nearly fills the entire clear cross-section of the chamber (16) available for the swing movement of the paddle.

Abstract: A system for the closed-loop control of a positioning unit in a motor vehicle with the system's loop controller supplying a signal to the positioning unit dependent upon a comparison between a predetermined-value signal and an actual-position signal. The predetermined-value signal depends upon the desired position of the positioning unit and upon the output signal from a signal-forming device. Based upon the predetermined-value signal and by simulating the control loop, a simulator generates an estimation signal for the actual-position signal. This estimation signal influences the response characteristic of the signal-forming device.

Abstract: An evaporative fuel-purging control system for an internal combustion engine, which controls purging of a mixture of evaporative fuel from a fuel tank and air comprises a purge control valve arranged across a purging passage for controlling the flow rate of evaporative fuel from the fuel tank to an intake passage. The flow rate of evaporative fuel is detected and compared with a desired flow rate commensurate with an operating condition of the engine. The valve opening of the purge control valve is controlled in response to results of the comparison. The change rate of the valve opening is varied according to the concentration of evaporative fuel in the mixture. Specifically, the change rate is decreased as the evaporative fuel concentration is higher.

Abstract: The supercharge pressure and the pressure differential which develops between the supercharge pressure and the exhaust gas pressure upstream of a turbocharger turbine are monitored. In the event that the supercharge pressure is below a target level which is determined to optimal for the instant set of operating conditions, a first injection reduction amount is calculated. To allow for the effect of very sudden accelerations wherein the pressure differential tends to become large and the charging efficiency of the engine tends to reduce, a second reduction amount is calculated based on the difference between the actual differential and a target value for the instant set of operating conditions. The second reduction amount is also subtracted from the injection volume which is calculated based on the engine speed and a signal which is indicative of the power demand on the engine (the accelerator pedal depression degree).

Abstract: A combustion control device for internal combustion engines, comprising cylinder pressure detecting means for detecting the combustion pressure in a cylinder, crank angle detecting means for detecting a crank angle of the engine to be controlled, cylinder pressure monitoring means for finding and monitoring the waveform of the cylinder pressure based on the cylinder pressure detected by the cylinder pressure detecting means and a crank angle signal outputted from the crank angle detecting means, calculating means for calculating thermal efficiency based on the found waveform, and combustion control means for controlling the amount of fuel supply to the engine, ignition timing and the amount of exhaust gas recirculation, depending on the results of the calculation by the calculating means.

Abstract: For controlling a solenoid actuator in PID control mode in response to input control information, the temperature of the coil of the solenoid actuator is detected or estimated, and the constant or constants necessary for PID control calculation are determined taking into account the resulting temperature. The input control information is subjected to the processing operation for PID control operation by the use of the determined constant or constants, whereby desired PID control characteristics can be obtained irrespective of changes in the temperature of the coil of the solenoid actuator. As a result, in particular, the step response and other dynamic characteristics can be improved.

Abstract: A torque control system for variable delivery pumps receiving torque from an engine employs a signal related to an engine torque available at each engine speed setting to control the torque, and thus the amount of engine power that is absorbed by the variable delivery pumps. In a low-power regime, wherein the fuel injected into the engine is less than maximum, torque control is effected by comparing the available torque with an amount of torque that would be available at maximum fuel injection. In a high-power regime, wherein the fuel injected is at least a predetermined value, torque contol is effected by comparing the available torque with an amount of torque that is available at a combination of a set engine speed and an actual engine speed. A bias circuit biases the stable speed operating point a small amount below the maximum speed, whereby improved fuel economy is attained.

Abstract: A control device for an internal combustion engine, comprising a calculating unit for calculating an engine control value for controlling an engine running condition on the basis of a conversion value into which a first engine condition value, which represents an engine running condition, is converted, and a converting unit for converting the first engine condition value into the conversion value. The engine control value discontinuously changes at a discontinuous point in accordance with a change of the first engine condition value, and the first engine condition value corresponding to the discontinuous point changes in accordance with a change of a second engine condition value. The conversion value corresponding to the discontinuous point remains constant even when the second engine condition value changes.

Abstract: A device for electronically controlling adjusting devices in an internal combustion engine in which the adjusting devices can be controlled, by comparing differentiated engine speed signals with predetermined threshold values in such a way that shuddering oscillations of the internal combustion engine are counteracted. The engine speed variable (n) is derived by means of a sensor (10) which provides a plurality of pulses per revolution of the engine crankshaft or camshaft. A first divider (14) divides the pulses from the sensor (10) by a fixed ratio. The output of the divider (14) is further divided in a divider arrangement which provides different divider ratios in dependence upon engine speed, the divider ratios being chosen so that measurement at engine speed is made over a complete combustion period of the engine, or a multiple thereof.

Abstract: An electronic speed governor for an air-compression internal-combustion engine that has an electronic control unit which detects numerous operating values of the automobile. The speed governor forms a control signal from these operating values as well as from stored limit values, and shifts smoke-limit curves as a function of altitude so that the fuel mass is corrected in accordance with keeping the smoke emissions constant.

Abstract: A method for operating an automatic control system for injecting fuel into an internal combustion engine, with the control system having an error correcting capability for deviations that occur in the control signal being processed by the control system, and with the control system having a controlling element, which is embodied as a precontrol, and PI-controller that are operated in parallel.

Abstract: The invention relates to a mechanical speed governor, apparatus for an injection pump of compression-ignition internal combustion engines provided with an electronically controlled adapting device. The adapting device is provided for correcting fuel quantity delivered by the pump in the range of the full-load and starting speeds, and is in operative connection with a quantity-control member of the injection pump via a two-step stop. The two-step stop can be transferred as a function of speed from a position corresponding to the starting speed into a position corresponding to the full-load speed.

Abstract: The invention relates to a method and apparatus for limiting road speed in electrically controlled diesel engines. The output signal of the road-speed transducer or, if the road-speed transducer is defective, the output signal of the engine speed transducer is evaluated by means of pregiven thresholds. In the presence of a simultaneous clutch signal and a quantity signal which is less than a pregiven injection quantity a waiting time is made available in advance of the quantity reduction so that when the clutch is actuated, fuel can be metered when the clutch pedal is depressed or the vehicle can be started on a hill. No transmission signal is necessary for limiting road speed whereby manipulations on the road-speed limitation are prevented.

Abstract: A method and an apparatus for metering fuel in a diesel engine is suggested wherein the fuel quantity is taken from a multi-dimensional characteristic field in the part-load range, in the full-load range, however, a limitation of the fuel quantity is undertaken with the aid of a lambda control. Minimal value selection stages are used for decoupling the various methods of fuel quantity control. Notwithstanding the dead times present in the system, there results a dynamically satisfying lambda control system since up to a catch curve, a rapid control and thereafter a slower lambda control are used. The use of a lambda control for full-load limiting leads to an exhaust gas almost completely free of particles.

Abstract: A fuel control apparatus for an internal combustion engine comprises an intake air quantity detecting means for detecting an intake air quantity for the engine, a crank angle detecting means for detecting a crank angle of the engine, a sampling means for sampling the intake air quantity every predetermined time, a first calculating manes for calculating the means value of the sampled values every predetermined crank angle, a switching means for changing the crank angle value in accordance with the revolution speed of the engine, and a second calculating means for calculating a fuel injection quantity on the basis of the calculated means value, and a fuel injection means for injecting fuel to the engine at the fuel injection quantity obtained by the calculation.

Abstract: A mechanical injection-pump governor with an electronically controlled torque-control in which, as a function of parameters, a stepping motor controllable by an electronic control device adjusts with its actuator a full-load stop interacting with the quantity-adjustment member of the injection pump. The torque-control movement of the actuator is limited by an end stop situated a short distance above the maximum full-load control path and by an end stop situated a short distance below the minimum full-load control path.