Abstract: The invention relates to a method and arrangement for preparing a fuel-metering signal M for a diesel engine starting with measured variables such as accelerator pedal position, rotational speed, lambda, exhaust gas temperature or torque. A fuel quantity request MW is pregiven in dependence upon the position of the accelerator pedal. This quantity request MW is supplied to a minimum selector together with a second signal. The output signal M of the minimum selector, in turn, determines the metered fuel. The second signal derives from a precontrol characteristic field 50 in dependence upon the speed. The output signal of the precontrol characteristic field MV is influenced by the controller output signal MR in specific operating conditions.

Abstract: The invention is directed to a method and arrangement for controlling a self-igniting internal combustion engine. The arrangement includes at least one measured-value sensor, electronic control unit for forming a quantity signal for metering fuel, and a control unit for driving individual actuators for each cylinder. The actuators determine the quantity of fuel injected by the pump elements into the cylinders. Under specific conditions, a corrective unit is activated which determines corrective values specific to the cylinders for making the cylinders equal. The open-loop control unit applies the metering signal to the actuators in dependence upon the quantity signal and the corrective values.

Abstract: The disclosure describes a method of avoiding an excessive drag torque for motor vehicles. When the accelerator pedal is released, an amount of fuel is supplied to the engine which is approximately under zero-load and which is gradually reduced over time. The occurring change of the rotational speed is monitored. When a certain rotational speed change is exceeded per time unit, the amount of fuel is gradually increased over time until a certain positive rotational speed change is recognized. Then, there is a switch-back to reducing the amount of fuel. The procedure is repeated until the vehicle has reached an operational condition with a constant rotational speed.

Abstract: The invention is directed to a method and an arrangement for controlling the fuel injection in a high-pressure fuel pump. Magnetic valves determine the fuel quantity to be injected into the engine. The magnetic valve is controlled during the pumping phase of the pumping element in such a manner that first a preinjection and then a main injection is carried out. In specific operating conditions, the control apparatus determines the duration of the drive pulses for the magnetic valve at which a preinjection just takes place. With the duration of the drive pulses as a basis, the control apparatus forms compensating signals for the drive pulses which effect preinjection and stores the same.

Abstract: The invention relates to a method and arrangement for controlling the fuel metered to an engine and especially to a diesel engine. The engine includes a fuel pump drive by a shaft for which injection start and injection end is fixed by a corresponding control of the electromagnetically actuated valve. The drive pulses for pump-delivery start and pump-delivery end are generated in dependence upon the analog signal of an angle sensor.

Abstract: A monitoring arrangement for a fuel filter of a diesel internal combustion engine is described. The metering of fuel of the diesel internal combustion engine is open-loop controlled or closed-loop controlled by an electronic control unit. This control unit influences the supply voltage of the sensor and evaluates its output signals for monitoring the function of the fuel filter.

Abstract: A vehicle speed control system comprises a vehicle speed controller (14) and an auxiliary engine speed controller (17) which keeps to the engine speed set by the first controller (14) and which controls the amount of fuel and/or air supplied to the vehicle engine. A comparator (13) compares actual and desired vehicle speed signals and is connected to the first controller (14), which produces a desired engine speed signal which is compared (16) with the actual engine speed signal from a sensor (21).

Abstract: The invention is directed to a method for influencing the metering of fuel to an internal combustion engine, wherein the amount of fuel to be delivered to the engine is varied at least in dependence upon the number of revolutions or working strokes of the engine. In this method, the number of revolutions or working strokes of the engine is measured for subsequent storage in a volatile and a non-volatile storage. If a supply voltage failure causes the contents of the volatile storage to be lost, the more essential portion of this number for the engine continues to be available in the non-volatile storage. Embodiments are described explaining how the volatile and the non-volatile storage can be realized and combined. Also, a description is provided as to how the metering of fuel can be influenced in dependence upon the number of revolutions or working strokes of the internal combustion engine.

Abstract: A control device for protecting an internal combustion engine in the case of malfunction of its fuel regulating system is disclosed. The control device includes means which in response to the occurrence of the first braking mode of operation of the engine after start activates a suction or pump connected to the suction chamber of a fuel injection pump. Then the reaction of the engine to the suction pump is tested. If, the engine does not react to a displacement of the control rod of the fuel adjusting mechanism, then an error is present and the engine is either stopped or switched over to an emergency mode of operation. The control device is suitable particularly for a Diesel engine.

Abstract: The invention is directed to a measuring arrangement for detecting injection-begin in an internal combustion engine equipped with fuel injection valves. The measuring arrangement includes an inductive position transducer controlled by a current source. The current source is regulated against changes in the level of the supply voltage and elements for stabilization against noise impulses on the supply voltage are provided. The operating point of the output transistor of the current source is regulated in response to sharp drops in the level of the supply voltage thereby obtaining an improved signal-to-noise ratio. The output current of the current source is stabilized with respect to noise by elements of a coupling connected between the base of the output transistor and the supply voltage.

Abstract: An emergency control apparatus is proposed for a fuel metering system in a Diesel engine, where the signal processing unit (microcomputer) and/or a regulator can be bypassed. In the case of the failure of the signal processing unit, the position signal of the driving pedal is switched more or less directly to the regulator for triggering the control unit for the quantity-determining member, and if there is a failure of the regulator, a purely proportional regulator comes into action. It is thus assured that even in the case of failure emergency operation is guaranteed, the course of which emergency operation can essentially be influenced only by the driver of the vehicle.

Abstract: Disclosed is an emergency control device for fuel dosing systems of IC engines, particularly for fuel injection devices of a diesel engine. A conventional regulating path for the fuel pump, includes a series connection of a set of data sensors, a signal processing circuit for computing a regular control signal, and a fuel regulating device connected to the fuel pump and provided with a manually or automatically controlled switching device. An emergency control branch is connected between the switching device and the sensor to function in parallel with the regular regulating device. The emergency control branch includes a nominal value generator of a signal corresponding to a maximum manifold pressure and a manifold pressure regulator controlled by output from the nominal value transmitter, to apply, via the switching device, to the fuel pump a dosing signal which causes the manifold pressure not to exceed the preset maximum value.

Abstract: The inductance of a variable inductor is put in series with a resistor to provide a delay circuit at the output of an amplifying path and the delayed voltage is fed-back to produce square waves having a period representative of the induct. The amplifying path includes a first amplifier and a final stage that includes a transistor. A second transistor is connected to a voltage supply line feeding the final stage and the delay network and is also connected to the final stage in such a way that the second transistor conducts when the first transistor of the final stage is blocked and so that the second transistor is automatically blocked when the output of the final stage is at a low potential. The base of the second transistor is connected through a resistance to a battery voltage line at a somewhat higher potential than that of the voltage supply line for the final stage.

Abstract: A fuel metering device for a fuel injection pump is proposed in which the amount of fuel to be injected is metered by means of a magnetic valve. An electro-magnetic valve and a back pressure valve are placed in series in the fuel supply channel leading to the pump work chamber of the fuel injection pump, whereby the back pressure valve places the closing element of the magnetic valve in the open position during the supply stroke of the fuel injection pump, so that only a small holding current is required to keep the magnetic valve open. Rapid switching of the magnetic valve is achieved by a mechanical closing by means of a closing spring of the magnetic valve after the exciter current is switched off.

Abstract: A device is proposed for drift compensation in fuel metering systems, in which it is not the metered quantity as such which is controlled in closed-loop fashion, but rather only the position of a quantity-determining member. The object of the invention is to maintain or re-obtain the original association between the fuel quantity and the position signal of the quantity-determining member for the purpose of providing a correct indication of the load state existing at a particular time. The drift compensation is intended to be capable of being performed manually, semi-automatically, or automatically, in an additive and/or multiplicative manner. It can furthermore be realized via a preferably rpm-dependent characteristic curve. The various values may be ascertained, for instance, in connection with running-out and running-up tests.

Abstract: Repeated trigger pulses cause a comparator to put a transistor into its conducting condition, producing a rise in emitter-collector current dependent upon the inductance of a variable inductor. A voltage corresponding to this current is developed across a resistor in circuit with the inductor and is applied to the noninverting input of the comparator and when it reaches a threshold value, the comparitor switches and turns off a transistor, after which the reaction current in the inductor is dissipated through one or more resistors. The comparator output produces a step wave having a duty cycle proportional to the inductance value, a signal which is particularly useful when the inductor is a transducer producing an inductance that varies proportionately to a physical dimension or a pressure, particularly when these are operation parameters of an internal combustion engine.

Abstract: A fuel control system for an internal combustion engine with correction for optimum values based on a variety of factors. Characteristic engine data is stored in preferably digital memories with capabilities for interpolation. Upon addressing the engine data fields with input signals related to current operational variables, for example the accelerator pedal position, the control system derives therefrom a nominal air flow rate which is used as the reference value in a control loop that sets the amount of recycled exhaust gas and the fresh air flow. As the actual air flow rate approaches the reference value, the fuel flow is adjusted to insure correct mixtures at all times. In another embodiment, the fuel is supplied on demand but cannot exceed a maximum value except under special override conditions. Several other embodiments and variants are presented.

Abstract: A device is proposed for the adjustment of a quantity-metering member of a fuel injection pump in an internal combustion engine with self-ignition, comprising an electric circuit arrangement for a control signal dependent on operating parameters, this signal inffluencing the position of the quantity-metering member via an electromagnetic servo unit wherein the electric circuit arrangement includes at least one series circuit made up of a minimum value selection stage, a maximum value selection stage, and a servo unit controller for the quantity-metering member and the output signals of at least two set-point stages for, in particular, the speed, the smoke limit, equalization, and exhaust gas temperature can be fed to the minimum value selection stage with the maximum value selection stage additionally coupled to a start control stage. In addition to the use of the device as a total controller, i.e.

Abstract: An apparatus for fixing the composition of the gas content and the degree of filling of cylinders in an internal combustion engine having autoignition, including a fuel metering device to which a signal dependent at least on the position of the driving pedal can be delivered and having an exhaust gas feedback control element in the air intake line as well as an apparatus for controlling the exhaust feedback rate. The apparatus includes measurement value transducers for the at least indirectly detectable total cylinder filling and the ratio of fresh air to exhaust gas or the air ratio pertaining to the aspirated fresh air and/or the fuel metering is influenced among others in accordance with this measurement value. The detection of the total cylinder filling can be accomplished indirectly by using measurement techniques for detecting pressure and temperature in the intake manifold.

Abstract: A fuel injection system receives valve control pulses, the length of which determines the fuel quantity delivered to the engine. A first counter receives a pulse train whose frequency depends on the air flow rate and this pulse train is admitted for a period defined by the engine speed. The content of the counter is then counted out at a frequency which is synthesized from operational parameters of the engine, including, in particular, the temperature. For this purpose, there is generated a temperature-dependent frequency which is fed to a multiplier circuit which combines this frequency with data derived from a memory to generate an output signal which is further processed to provide the fuel injection pulses for the engine.