Abstract: In an intake air flow rate calculation process, a pulsation correction coefficient calculation process is executed to calculate a pulsation correction coefficient, which is used to compensate for an output error of the air flow meter resulting from an intake air pulsation, based on an engine rotation speed, a throttle opening degree, and an atmospheric pressure, and the intake air flow rate is calculated by correcting the intake air flow rate with the pulsation correction coefficient.

Abstract: A method for operating a fuel system for an internal combustion engine having a metering device, an electrical actuating device, and a valve element includes: activating the electrical actuating device in at least one first cycle in such a way that the valve element switches into a second position corresponding to an open metering device; activating the electrical actuating device in at least one second cycle in such a way that the electrical actuating device is activated from activation to activation, with activation energy which decreases gradually, until a limiting case is reached in which the valve element only just or just no longer switches into the second position; ascertaining a first activation energy, which corresponds to the limiting case; and subsequently activating the actuating device, taking the first activation energy into account.

Abstract: Valve stopping control is performed that changes an operating state of an intake valve and an exhaust valve to a closed-valve stopped state when executing a fuel-cut operation. A device is provided that sets an in-cylinder return-time target air-fuel ratio for an initial two return cycles when returning from a fuel-cut operation. The return-time target air-fuel ratio is set so that respective air-fuel ratios of air-fuel mixtures of fuel and air injected into the same cylinder for respective cycles during the initial return cycles each become values that fall within a combustible range, and so that even if a total amount of fuel injected into the same cylinder for the initial return cycles is supplied into the cylinder during an arbitrary single cycle, the air-fuel ratio of the air-fuel mixture of the total amount of fuel and air becomes a value that falls within the combustible range.

Abstract: Disclosed are an apparatus and a method for processing a fuel cut starting or releasing the fuel cut using a tilt angle of a vehicle or a clearance angle of an acceleration pedal. An exemplary embodiment of the present invention can reflect driving habit or acceleration intention of a driver by interlocking a clearance angle of the acceleration pedal in addition to starting or releasing a fuel cut according to a tilt angle of a vehicle, thereby increasing fuel efficiency driving or convenience of driving. The exemplary embodiment of the present invention can improve stability of driving by applying a haptic technology.

Abstract: A control apparatus for an internal combustion engine is provided, which is capable of suppressing deterioration of exhaust emission due to an unburned fuel contained in oil which enters a combustion chamber during valve stop control while preventing inflow of fresh air to a catalyst, at a time of valve return following return from fuel cut. Variable valve operating apparatuses having valve stop mechanisms capable of changing operation states of an intake valve and an exhaust valve between valve operation states and valve closed and stopped states are included. Valve stop control that changes the operation states of the intake valve and the exhaust valve to the valve closed and stopped states is performed, at a time of execution of the fuel cut. When a return request from the fuel cut with the valve stop control is detected, a fuel is supplied to a combustion chamber before the operation state of the exhaust valve is returned to the valve operation state.

Abstract: A burner-based exhaust gas generation system, having a blower for providing air into the system. The blower is controlled to compensate for variations in mass air flow into the system.

Abstract: A fuel injection control apparatus is capable of reducing a minimum quantity of fuel injection without reducing a maximum quantity of injection. To open a fuel injector valve, a driving circuit supplies an electric current from a high-voltage power supply to the fuel injector. Then, after valve opening, the high-voltage power supply is switched to a low-voltage power supply, and an open state of the valve is retained. For opening the valve of the fuel injector, a microcomputer, after supplying current from the high-voltage power supply to the injector, discharges the current rapidly for a decrease below a first current level at which the open state of the valve cannot be retained. The microcomputer then controls the supply current to the injector so as to supply a current at a second current level at which the open state of the valve can be retained.

Abstract: The present invention provides a constant flow fuel injection system for an engine, the system comprising an engine control unit, a variable DC brushless motor fuel pump, and a constant orifice fuel injector, wherein the engine control unit drives the fuel pump to provide fuel pressure to the fuel injector by modulating the fuel pump pressure to vary the fuel flow rate to the fuel injector.

Abstract: A continuous flow fuel system includes an oxygen sensor for analyzing the exhaust gases of an engine. The output from the oxygen sensor, representing the oxygen content in the exhaust gases, is transmitted to an electronic control module, which in turn controls the output of a fuel pump. The output of the fuel pump provides fuel to maintain a desired fuel/air ratio. The desired fuel/air ratio may be selected by a user of the engine or it may be predetermined and factory-set.

Abstract: In a fuel supply control system for an internal combustion engine, a voltage value to be applied to a fuel pump is controlled depending on a monitored alcohol concentration contained in a fuel to allow the fuel pump to supply a controlled amount of the fuel which is determined based on the monitored alcohol concentration contained in the fuel.

Abstract: Liquid fuel from a controlled supply is delivered to a delivery tube under a pressure which is too low to deliver a charge of fuel under static conditions. During an induction stroke however, air entering a cylinder of an engine is drawn through a venturi-type constriction and thereby draws air from a duct by-passing the engine throttle. This air is drawn through a convergent passage to pass the delivery end of the tube at supersonic velocity to draw therefrom a charge of fuel. The tubes for each inlet passage are in permanent communication with the same metered supply so each cylinder draws its appropriate charge in turn.

Abstract: An engine fuel supply system has a main conduit which supplies fuel into an intake passage, a means for regulating fuel flow through this main conduit through a range of values according to the value of a control signal with the fuel flow provided when the control signal is zero being a basic non zero value, a power conduit which selectively supplies fuel into the intake passage, and a means for opening or closing the power conduit. When the power conduit is closed: a basic value Sb for the main conduit control signal is determined according to engine operational parameters; a value Sn is added to Sb; a multiplicative correction is applied; and the main conduit control signal value is determined by subtracting Sn.

Abstract: Fuel for a working cylinder chamber (8) of an internal combustion engine is drawn through an atomizing nozzle (39) from an accumulator (30). Fuel is supplied by a low pressure source (12) through a variable constriction (16) linked to the throttle (4) and through a solenoid valve which is pulsed at a frequency proportional to engine speed.

Abstract: A system to supply vaporized fuel to an internal combustion engine resulting in reduced exhaust emissions and better fuel economy due to the air and fuel mixture being more homogenous and more evenly distributed to the cylinders of the engine. A vaporizing chamber receives a predetermined quantity of fuel from an injector in the form of a spray that initially impinges upon a heated plate which partially vaporizes the fuel and then passes through a chamber containing copper wool for final vaporization of the fuel. The plate, copper wool and vaporizing chamber are heated by an external jacket and an internal concentric passageway communicated with the exhaust pipe so that heated exhaust products are utilized to vaporize fuel.

Abstract: The output of a fuel pump of an internal combustion engine is controlled by the duty cycle of its power supply circuit, which is in turn controlled in accordance with engine and fuel conditions. Sensor signals indicative of the engine and fuel conditions are processed to derive a DC voltage level suitable to the conditions. The derived voltage and a triangular voltage signal of fixed frequency and amplitude are compared by a comparator which outputs a train of pulses. The frequency of the pulse train is that of the triangular wave and the duty cycle thereof is determined strictly by the derived voltage. The pulse train from the comparator is amplified to drive the fuel pump.There may be many different kinds and combinations of engine and/or fuel condition sensors. In addition, sensor signal processing to derive the DC voltage level may take a number of different forms and may include feedback from the fuel pump power supply circuit in order to suppress transient fluctuations.

Abstract: A current regulator is proposed for use in an electronically controlled, continuously operating gasoline injection system, with the aid of which a control element can be supplied with different current values depending upon the operating states of the engine. In addition to a current regulating phase during active operation, it is possible with the proposed current regulator to reverse the direction of current flow in the control element for the sake of blocking the supply of fuel during overrunning. Towards this end a circuit apparatus links signals relating to rpm, throttle valve position and temperature. Furthermore two safety circuit arrangements are proposed for the current regulator, so that in case of a failure of important components there is no impairment of safety, and emergency operation is assured.

Abstract: An electronic fuel supply device for an automotive engine has a vortex flow sensor for sensing the flow of suction air into the engine, an electromagnetic valve which driven for a predetermined time in synchronism with the frequency output from the vortex flow sensor so as to permit the passage of fuel therethrough, and a control valve for limiting the flow of fuel through the electro-magnetic valve. The fuel is metered by the electro-magnetic valve and the control valve, and the fuel may thus be supplied in metered amounts to the fuel injection valves in the respective cylinders for injection into the engine.

Abstract: A fuel feeding apparatus for an internal combustion engine, in which a thermal type flow sensor is disposed in a bypass air path supplying bypass air from a point upstream of a Venturi portion formed in a main air-intake path to the Venturi portion, and the quantity of air flowing through the bypass air path is controlled by a solenoid unit so that the output signal of the thermal type flow sensor attains coincidence with a pre-set level. A fuel-metering valve actuated by the solenoid unit meters the quantity of fuel meeting a variation of the quantity of intake air being supplied to the engine so as to inject the metered quantity of fuel in a continuous flow into the main air-intake path. An oxygen sensor senses the concentration of oxygen in engine exhaust gases, and, on the basis of the output signal of the oxygen sensor, the value of the pre-set level is modified so that the rate of excess air in engine exhaust gases can be maintained to be .lambda.=1.

Abstract: An electronic controller for an internal combustion engine provides a ratio control signal corresponding to a respective air/fuel ratio, and responds to an air flow signal, a fuel flow signal and the ratio control signal to control fuel flow as to make the ratio of air flow to fuel flow substantially equal to said respective air/fuel ratio. The ratio control signal is developed from a base run ratio control signal as modified in response to various parameters such as engine temperature, manifold pressure, idle, manifold vacuum, fuel temperature, wide open throttle, engine speed, and start. The controller also provides a speed-up circuit for promptly responding to change in air flow and dynamic braking for the fuel metering pump. The pump speed circuit includes a range extender.

Abstract: An electronic controller for an internal combustion engine provides a ratio control signal corresponding to a respective air/fuel ratio, and responds to an air flow signal, a fuel flow signal and the ratio control signal to control fuel flow as to make the ratio of air flow to fuel flow substantially equal to said respective air/fuel ratio. The ratio control signal is developed from a base run ratio control signal as modified in response to various parameters such as engine temperature, manifold pressure, idle, manifold vacuum, fuel temperature, wide open throttle, engine speed, and start. The controller also provides a speed-up circuit for promptly responding to change in air flow and dynamic braking for the fuel metering pump. The pump speed circuit includes a range extender.

Abstract: A flow regulating device for use in a single-point control electronic fuel injection system. The flow regulating device receives a discrete, pressurized fuel pulse or charge from a fuel injector and extends its time duration over the charge cycle period to approximate a continuous flow. The extended fuel charge is provided to an atomizer for mixture with air preparatory to being drawn into an engine intake manifold. In one embodiment of the invention, the flow regulating device includes a constant pressure valve together with a restricted flow passage. The pressure setting of the valve is below the pressure at which the discrete fuel charge is emitted from the injector, and the restricted passage has an orifice dimension smaller than that of the injector nozzle. In another embodiment of the invention, the flow regulating device takes the form of a pair of parallel connected constant pressure valves together with restricted flow passages.