Abstract: In a system which detects the condition of an exhaust gas of an internal combustion engine by an exhaust gas sensor and corrects the rate of fuel supply in a feedback control mode, on the basis of the detected condition, the rate of fuel supply is corrected, in response to a particular output of the exhaust gas sensor indicating an optional air-to-fuel ratio of the fuel supply, to a rate of the past fuel supply which occurred at a dead time before detection of the particular output of the sensor, the dead time being corresponding to a time required for a fuel fed into the air inlet pipe to be burned up and then its exhaust gas to reach the sensor.

Abstract: An ignition timing control system for an internal combustion engine comprises first circuitry for producing a function of the intensity of combustion knock in each cylinder in a sequence, second circuitry for storing the function of each cylinder respectively in a memory circuit each of which corresponds to a specific cylinder, and third circuitry for determining the ignition timing of each cylinder by modifying the basic ignition timing determined by an advance mechanism, in accordance with the respectively stored functions.

Abstract: An electronically-controlled carburetor is disclosed. This electronically-controlled carburetor is provided with a control fuel path in addition to a main fuel path opened to the venturi of the air horn. This control fuel, after being introduced to a constant pressure chamber regulated at a constant pressure, is further introduced to the air horn through a sonic flow nozzle provided at the opening of the constant pressure chamber, together with the control air introduced to the constant pressure chamber. The amount of the control fuel introduced to the air horn and the amount of the control air are regulated on the basis of control electrical signals generated by an electronic control circuit supplied with data indicative of engine running conditions. In this way, the air-fuel ratio is properly controlled over the entire range of engine running conditions.

Abstract: A fuel control system comprises a probe in contact with the exhaust gases, a circuit for supplying fuel and air to the engine, having a solenoid valve for metering at least the fuel flow, a closed-loop electronic control circuit connected to the probe and energizing the solenoid valve in dependence on the signal from the probe. The loop is opened responsive to predetermined operating conditions of the engine. Further means control the solenoid valve in dependence on another engine operating parameter during open-loop operation. A memory is provided for storing a value representative of the control of the solenoid valve means during closed-loop operation.

Abstract: A device for the control of the traveling speed of a motor vehicle with a regulating unit which is actuatable by the vehicle driver, particularly with a gas pedal, with electrical means for the transmission of the movement of the same to an element which influences the fuel-air mixture, particularly a throttle valve, with an electrical controller, the element which influences the fuel-air mixture being in operative connection with the output of the electrical controller, and with at least one comparator, one of the inputs of the comparator being applied with a voltage which is proportional to the rotational speed of the motor and its other input being applied with an adjustable constant voltage value for the rotational speed limitation. As a controller a PI controller is connected in parallel with a P-controller of great amplification.

Abstract: A feedback type air fuel ratio controlling system for detecting and controlling an exhaust gas composition of an engine. A gas sensor provides a sensor signal related to an exhaust gas concentration. This sensor signal is coupled through an automatic gain control (AGC) DC level amplifier to a deviation detector. The deviation detector compares the signal to a reference signal V.sub.p representing a stoichiometric air fuel mixture and provides a correction signal for adjusting the engine's air fuel ratio. The AGC DC level amplifier provides automatic DC level compensation for a slowly deteriorating sensor and, working in combination with the deviation detector, an AC hysteresis response for judging rich to lean and lean to rich changes sensed by the exhaust gas sensor.

Abstract: A fuel atomizing device is provided for use with the carburetor having an air induction tube and a fuel supply. In the preferred form the atomizing device comprises a body having an inner tubular part coaxially positioned within an outer tubular part. The inner body part, however, is spaced inwardly from the outer part thus forming a tubular chamber therebetween. One end of the chamber is closed by securing the body parts together while the other end of the chamber is open through a slot formed between the body parts. The chamber is connected to the carburetor fuel supply via a tube while the body is coaxially positioned within the carburetor air induction tube and so that its closed end faces upstream. In operation, air passing through the carburetor induction tube passes around both the inner and outer body parts and, in doing so, draws fuel from the chamber and through the slot at the other end of the body.

Abstract: An ignition control system typically used with an automobile engine provides tight feedback control on engine timing. An integrator produces a waveform which is typically dual-slope in response to a timing signal supplied by a sensor responsive to rotation of a distributor. A dwell-control circuit produces a dwell-control reference signal which varies with the integrator waveform voltage at low engine speed. A comparator generates an output drive-control signal when the integrator waveform voltage equals or is less than the dwell-control reference voltage. An output drive circuit produces an activation signal in response to the drive-control signal to activate an output drive circuit which then supplies an ignition signal to an ignition coil. A feedback loop between the output drive circuit and the output drive-control circuit causes the output drive circuit to stabilize at a selected state such as a specified output current level.

Abstract: An electronic controlled fuel injection system for use in an internal combustion engine is disclosed which comprises a Karman's vortex flow sensor for measuring the flow of air supplied to the engine to provide an intake air flow indicative signal, a flow deriving circuit responsive to throttle opening and engine speed measurements for deriving an intake air flow measurement to provide an intake air flow indicative signal, a control circuit for providing an injection pulse signal in synchronism with rotation of the engine, the injection pulse signal having its pulse width determined in accordance with the intake air flow measurement, and a signal selector responsive to engine operating condition for passing the intake air flow indicative signal from the Karman's vortex flow sensor to the control circuit when the engine is under low load conditions and for passing the intake air flow indicative signal from the flow deriving circuit to the control circuit when the engine is under high load conditions.

Abstract: A system for controlling ignition timings in an engine wherein ignition signals in the specific cylinders are previously advanced by a predetermined value over ignition signals in other cylinders, the knockings in the specific cylinders are detected, and ignition timings in all the cylinders are delayed in accordance with said knockings, whereby strong knockings which would otherwise be caused to all the cylinders are prevented in advance, the ignition timing control of knockings in the engine can be effected irrespective of the accuracies of a knocking sensor.

Abstract: An air-compressing direct injection internal combustion engine having a combustion chamber in the shape of a body of revolution which combustion chamber at the end of the compression stroke contains nearly the entire necessary amount of combustion air which by suitable means is circulated about the cylinder axis of the respective pertaining cylinder of the engine. In this engine, a substantial portion of the liquid fuel is in the form of a thin film applied to the combustion chamber wall where it is processed so as to be picked up by and intermixed with the combustion air, whereupon the fuel air mixture is burnt. For purposes of facilitating the processing of the above mentioned fuel film and/or the realization of a pre-oxidation of the fuel, and for facilitating the pick-up of the fuel in the direction of the rotation of the air, additional means are provided and arranged in or on the combustion chamber wall and, when viewed in the direction of rotation of the air are located ahead of the fuel film.

Abstract: A non-contactor ignition system for generating an ignition voltage under controlling a primary current of an ignition coil by a semiconductor switching element, comprises a capacitor which is charged by a first power source and repeats a charging and a discharging in each constant period; a semiconductor switching element for ignition timing which is connected to the capacitor and the input terminal of said semiconductor switching element; and a second power source which generates an output voltage which is connected in said input circuit of said semiconductor switching element for ignition timing and whose value is varied depending upon the variation of revolution velocity of an engine and which has a long period including at least the charging period of said capacitor.

Abstract: A knocking control device having a knocking detecting circuit for detecting, as an electrical signal, an amount of variation corresponding to an internal pressure variation within a cylinder of an engine due to an engine knocking; an averaging circuit for converting the electrical signal from the knocking detecting circuit to a signal corresponding to a knocking energy; a crank angle detecting circuit for detecting a rotation phase of the engine; a comparison circuit for comparing the output signal corresponding to the knocking energy of the averaging circuit with a reference value defining a knocking allowable level to obtain a control signal for maintaining an engine knocking strength in a predetermined range; and an ignition control circuit connected to an ignition circuit, for controlling the ignition timing of the ignition circuit by the control signal from the comparison circuit.

Abstract: An improvement to an internal combustion engine having a fuel system for feeding a fuel-air mixture to the combustion chambers and an electrical generation system, such as an alternator. An electrolytic cell is attached adjacent to the engine to generate hydrogen and oxygen upon the application of a voltage between the cathode and anode of the electrolytic cell. The gas feed connects the electrolytic cell to the engine fuel system for feeding the hydrogen and oxygen to the engine combustion chambers. Improvements include placing the electrolytic cell under a predetermined pressure to prevent the electrolyte from boiling off, a cooling system for the electrolytic cell and safety features.

Abstract: Electrical circuitry including a single absolute pressure transducer that is arranged to be exposed to substantially atmospheric pressure during a selected associated internal combustion engine operating condition produces an electrical pressure value indicating signal that is stored only when the pressure transducer is exposed to substantially atmospheric pressure. An electronic data processor unit preprogrammed to calculate a selected engine operating parameter value for the associated engine is preprogrammed to periodically effect a predetermined atmospheric pressure correction of the selected engine operating parameter value when the stored electrical pressure value indicating signal differs in a selected sense from a preselected value.

Abstract: A closed loop control system is disclosed for controlling the air-fuel ratio of an internal combustion engine. An oxygen sensor is connected into the control loop after engine warm up when the temperature has reached its operating temperature to maintain the air-fuel ratio close to the stoichiometric value. An engine roughness detector is connected into the control loop before the oxygen sensor has reached its operating temperature to maintain the air-fuel ratio close to a predetermined lean limit. A temperature sensor and switching means controlled thereby are provided to alternately connect the roughness detector and the oxygen sensor in the control loop.

Abstract: A closed loop fuel controller for a vehicle internal combustion engine is responsive to the oxidizing/reducing conditions in the exhaust gases from the engine to provide a control signal for adjusting an air and fuel supply means and which varies in a sense tending to produce a predetermined air/fuel ratio. When the engine operation changes from one condition to another condition representing an acceleration or deceleration transient, the value of the air/fuel supply adjustment is preset to a value from a memory location addressed by the engine condition determined to produce the predetermined air/fuel ratio when the engine is accelerating and to a value from another memory location addressed by the engine condition determined to produce the predetermined air/fuel ratio when the engine is decelerating so that the air/fuel ratio adjustment is substantially instantaneously preset to the value determined to produce the predetermined ratio during engine accelerating and decelerating transient conditions.

Abstract: An air fuel ratio management system having a calibration correction for the pressure differentials between the exhaust and intake manifolds of the engine is disclosed. The differential calibration corrects the air/fuel ratio of the system for the variable internal exhaust gas recirculation occasioned by changing restrictions to flow found in the intake and exhaust manifolds. In one implementation a differential pressure sensor communicates with both the intake and exhaust manifolds to develop a differential pressure signal. The differential pressure signal is thereafter applied to a function circuit which generates a pressure correction signal. An electronic control unit receives the pressure correction signal and utilizes it to modify the air/fuel ratio calibration according to the functional conversion. In the preferred embodiment the function circuit comprises a voltage controlled linear current source.

Abstract: A closed loop air-fuel ratio controller adjusts the air and fuel ratio of the mixture supplied by a carburetor to an internal combustion engine to a predetermined ratio in response to sensed exhaust gas oxidizing-reducing conditions. An air valve is energized to bleed air into the air-fuel mixture upstream of the exhaust gas sensor and independent of the mixture supplied by the carburetor when the carburetor idle fuel system is functioning and the magnitude of the adjustment in the mixture leaning direction reaches a predetermined value in response to a sensed rich air-fuel ratio to effect a decrease in the amount of the adjustment in the lean direction. The air bleed effectively increases the lean adjustment authority of the air-fuel ratio controller and avoids a lean air-fuel ratio excursion as the carburetor operation shifts from its idle fuel circuit to its main fuel metering circuit during cold engine operation.

Abstract: In an internal combustion engine in which overheating phenomena in the explosion chamber are to be monitored and prevented, a temperature sensor is arranged in the region far from the sparking plug to send signals to a governing electronic circuitry which is arranged for modifying the ignition advance responsively to abnormal situations and for restoring normal running conditions as soon as the disturbing phenomena have ceased to occur.