Abstract: A load adjustment device, intended for an internal combustion engine of a motor vehicle, has a desired-value transmitter actuatable by means of an accelerator pedal. The accelerator pedal has a safety contact which opens when the idle position of the accelerator pedal is reached. This safety contact is connected directly to an actuator, thus circumventing a control electronics system of the load adjustment device, and preventing action on the actuator by the control electronics system.

Abstract: Provided is a method for controlling an advance angle of a power engine which can associate the rotational speed or be rotational period with the advance time period by using a single small look up table in a simple manner, and can be implemented by using a relatively small storage device. Because of provision of the steps of detecting a rotational period of a power engine as a binary number consisting of a first number of bits; extracting a second number of bits from the binary number, the second number being smaller than the first number; obtaining a rotational period parameter from the extracted bits or by convening the extracted bits by an arithmetic process based on the first number, the second number, and a minimum value of the rotational period of the engine; and determining an advance angle for each given rotational speed of the engine by looking up a table specifying a relationship between the rotational period parameter and the advance angle.

Abstract: To provide an improved heat insulating structure in which the movement of air in the air space of a heat insulating layer is permitted as small as possible thus giving a higher heat shielding effect. A heat insulating layer of an air space is provided between a center tube and an external heat shielding tube in a fuel injection nozzle and a carbon getter is disposed at an interface between the heat insulating layer and a combustion chamber. When a combustion gas moves into the carbon getter, its carbon components are trapped and accumulated thus blocking between the heat insulating layer and the combustion chamber. As the heat insulating layer is isolated, its inside air remains stagnate increasing the heat shielding effect. This srtacture has been appied to the pre-combustion chamber.

Abstract: An apparatus for lean-burn control of an internal combustion engine, comprising: an exhaust pressure-sensor for measuring the exhaust pressure in the exhaust system of the internal combustion engine at least when the internal combustion engine is subjected to lean combustion; a decision means for determining whether misfiring occurs in the internal combustion engine, based on the measured exhaust pressure; and a control unit for controlling the fuel/air ratio of intake mixed gas introduced into the internal combustion engine, based on the determination of the occurrence of misfiring, thereby accurately and quickly detecting and preventing the occurrence of misfiring and achieving super-lean burn control.

Abstract: A one-cylinder diesel engine with one cylinder head (1) is manufactured as a one-piece die casting; its intake passage (4) for the combustion air comprises a swirl channel (12) which feeds into a swirl chamber (11) situated on the back side of the intake valve (13).

Abstract: An engine air/fuel ratio control system maintains average engine air/fuel ratio at a desired lean air/fuel ratio during cold engine operation in order to more rapidly warm the catalytic converter. Fuel delivered to the engine is modulated with a truncated triangular wave which is truncated to minimize lean air/fuel excursions. An error signal is generated from the exhaust gas oxygen sensor output, and a proportional plus integral control responsive to the error signal generates a feedback correction value to maintain the desired air/fuel ratio. Gain of the controller is increased when the error signal indicates engine air/fuel operation leaner than a preselected air/fuel ratio to further minimize excursions in a fuel enleanment direction.

Abstract: A hybrid gaseous fueling system having a low pressure supply and a high pressure supply is disclosed. This system provides the advantages of fueling with a low pressure charge during steady state operation and also provides a way to more rapidly smooth engine transients resulting from changes in engine operating characteristics such as speed or load by modulating high pressure fueling of the engine. Furthermore, air/fuel ratio control may be readily integrated into this system. In addition, start-up of the engine is performed using more fuel from the high pressure supply than the low pressure supply up to a predetermined level of engine operation. At that level and beyond, low pressure fueling is greater than high pressure fueling.

Abstract: An improved fuel injection control system for an engine embodying a plurality of fuel injectors, one for each cylinder. During normal engine running conditions, the amount of fuel injected is determined by engine running conditions and the injectors are operated sequentially in accordance with the engine firing order. For facilitating startup, the injectors are all operated simultaneously during the startup mode to supply a predetermined amount of fuel.

Abstract: An apparatus for intermittently atomizing and injecting fuel with the assistance of air. The apparatus includes a cylinder (1) having a cylinder head (4) with a valve seat (5) and at a flow passage, a piston (2) driven within the cylinder by a rotating crankshaft (3), an injection valve (6) with a valve head (14) and a spring element (7) urging the valve head (14) into engagement with the valve seat (5) to close the flow passage. The injection valve generally includes an actuating surface (12) that cooperates with the piston (2) to mechanically open the valve (6) when the piston reaches the end of its compression stroke. As a result, the present invention delays the start of valve opening until the piston maximizes the atomizing pressure within the cylinder (1) thereby advantageously maintaining small fluid drop sizes and high velocity of the spray jet. Additionally an annular gap (16) around the valve head (14) directs the spray jet centrally into the combustion chamber (10).

Abstract: A spark ignited, reciprocating internal combustion engine, including a piston housed within a cylinder closed by a cylinder head has a fuel system for injecting fuel directly into the engine cylinder so as to achieve a homogeneous mixture with the fuel injection system injecting a first fraction of fuel during a first injection event and a second fraction of fuel during a second injection event.

Abstract: This invention relates to an in-cylinder injection internal combustion engine. A recessed portion (22A) is arranged in a top wall of a piston (22) to promote formation of a vertical swirl so that a flow of inducted air introduced into a combustion chamber (27) of the engine is caused to advance from a lower wall (21A) of a cylinder head (21) of the engine toward the top wall of the piston (22) and then to advance backward from the top wall of the piston (22) toward the lower wall (21A) of the cylinder head (21). A corner of the recessed portion (22A) is formed blunter at an outlet side of the vertical swirl than at an inlet side of the vertical swirl. In the in-cylinder injection internal combustion engine in which fuel is injected directly into the combustion chamber (27), it is possible to achieve inter alia a high gas mileage by allowing a lean air-fuel mixture to undergo stratified combustion and also a high power output when a gas-fuel mixture richer than the lean air-fuel mixture is burnt.

Abstract: An internal combustion engine system including an engine, timer/distributor device and a compliant electromagnetic device is disclosed. The engine may have one or more cylinders and includes an anode positioned above a cathodic piston whereby the anode delivers high intense short bursts of electrical energy through the combustion chamber and ignites fuel delivered by an injector. Each engine cylinder is connected to a distributor which sequences and delivers the high energy impulses from the compliant electromagnetic device to an individual cylinder when the piston is at or near top dead center. The compliant electromagnetic device includes an inductor, a power source and a field of material, i.e., the air/fuel mixture within the combustion chamber. The summed equivalence of the electromagnetic fields within the combustion chamber at any instant in time controls the intensity of the pulses and the quantity of pulses that are discharged by the anode.

Abstract: A diesel engine can by high-pressure injection be supplied with both fuel oil and fuel gas. Each combustion in the cylinders of the engine is initiated by injection of fuel oil, and gas can be injected after initiation of the combustion. The gas share of the total fuel amount per combustion is adjustable, and the gas injection is prevented by a safety device in case of failing injection of fuel oil. When the share of gas of the total amount of fuel at a certain engine load is changed, the starting time for injection of fuel gas in relation to the starting time for injection of fuel oil is varied so that the gas injection is delayed when the gas share of the total amount of fuel is smaller, and vice versa.

Abstract: Electronic engine control systems have a plurality of individual components on the intake tube, some of them located relatively far from one another. For electrically connecting the individual components to the electronic control unit, relatively long electric connecting lines and a relatively large number of plug connections are therefore necessary. This invention sets forth a preassembled throttle apparatus which includes at least one throttle device, rotatably accommodated in a throttle valve support, and an idling adjuster in a housing; the throttle apparatus has a bypass conduit, which bypasses the throttle device and which can be varied by the idling adjuster, into which a regeneration valve can output fuel, the regeneration valve being triggerable by an electronic control unit that is also accommodated in the housing. The throttle apparatus of the invention is intended particularly for mixture-compressing internal combustion engines with externally supplied ignition.

Abstract: An internal combustion engine having a direct cylinder injection and including a variable valve timing mechanism for at least changing the time of closing of the intake valve. The fuel injection timing and intake valve closing timing are controlled so that under low and mid-range engine speeds, but high loads, the intake valve is closed before the piston reaches bottom dead center position on its intake stroke so as to reduce the effective compression ratio. Fuel injection timing is begun before the piston has reached its bottom dead center position during the intake stroke under high-speed, high-load conditions and is not initiated until after the piston has reached its bottom dead center position and begun its compression stroke under other engine running conditions. The engine is provided with an injector location and piston with a bowl in its head that improves fuel stratification under at least some running conditions so as to permit lean burn operation.

Abstract: The present invention relates to a controlled-ignition direct fuel injection, four-cycle internal combustion engine including a combustion chamber (3) in which at least two intake lines (31, 32) terminate through ports (21, 22, 23) and an exhaust line (5), each of which can be closed by a means such as a valve (41, 42, 6), at least one ignition means (7; 11), a means (9) for direct injection of fuel into said combustion chamber (3). According to the invention, the intake ports (21, 22) are diametrically opposite each other. In addition, at least one of ignition means (11) has an axis disposed perpendicularly to the outer surface of the fuel jet generated by injection means (9 ).

Abstract: A vehicle speed limiting system for a vehicle having an engine which includes a plurality of fuel injectors coupled to an inline, low volume fuel injection pump operative to successively trigger a flow of fuel directly to the individual fuel injectors. The vehicle speed is converted to a speed signal which, when it reaches a preset limit, is utilized by the system control to close a fuel control valve through which fuel normally passes to the injection pump, and also to simultaneously open a pressure regulator. The fuel control valve includes a small orifice to pass just enough fuel to prevent pump cavitation. The system is characterized by a low fuel residual upon cutoff by the fuel control valve so that the engine speed is quickly slowed for lack of fuel.

Abstract: An engine control apparatus controls a throttle valve opening degree in response to a demand output of a driver. A target charged intake air amount of air taken into a cylinder per intake stroke is set in response to the demand output. Based on an air pressure generated at an upstream side of a throttle valve, the maximum actual charged intake air amount is set as a maximum value of the actual charged intake air amount taken into the cylinder per intake stroke. The target charged intake air amount is normalized by calculating a ratio of the target charged intake air amount to the maximum actual intake air amount. The throttle valve opening degree is set based on the normalized target charged intake air amount and an engine speed. Then, a signal for actuating the throttle valve is output to a throttle actuator so that the throttle valve has the set opening degree. Fuel injection amount is set based on the target charged intake air amount.

Abstract: A method and system for monitoring fuel delivery to an internal combustion engine having a first and second mode of operation and controlling the engine accordingly. An oxygen content of exhaust gas emitted from the engine is sensed and a corresponding oxygen content signal is generated. Air fuel ratio correction data is determined based on the oxygen content signal. If the engine is operating in the first mode, the air fuel ratio correction data is compared to a first set of predetermined air fuel ratio correction thresholds and a first failure signal is generated based on the comparison between the air fuel ratio correction data and the first set of predetermined air fuel ratio correction thresholds.

Abstract: An engine, having an intake passage, a throttle valve arranged in the intake passage, and a fuel injector arranged in the intake passage for injecting fuel into the intake passage, comprises an air-flow control valve arranged in the intake passage between the fuel injector and the throttle valve. The air-flow control valve is controlled to close during the engine starting operation, and to open after the engine starting operation completes. The air-flow control valve has a valve element having an axis about which the element is rotatable when the valve is opened or closed. The rotational direction of the valve element is selected so that air flowing through the valve is guided by the valve toward the fuel injector when the air-flow control valve is controlled to an intermediate open position which is between the closed position and the full open position.