Abstract: Disclosed is a fuel injection system particularly useful on supercharged boat and vehicle drag racing engines which functions to provide a positively controlled uniform fuel/air ratio proportional to engine speed from idle through maximum engine horsepower operation. The system utilizes an engine-driven positive displacement pump supplying pressurized fuel to calibrated injection nozzles via a unique driver-controlled fuel metering valve. This valve has idle and full throttle positions for vehicle racing, but idle, partial and full throttle positions for boat racing. In each application, excess fuel entering a rotary metering valve is returned to the source via continuously open valveless passages and, upon initiation of acceleration, total fuel requirements are supplied to the engine instantly and without delay in a precisely controlled fuel/air ratio.

Abstract: An apparatus is proposed which serves to form the operating mixture for internal combustion engines, in particular for mixture-compressing engines having externally supplied ignition. The apparatus includes an air measuring device having a control body, which has a circularly curved control section and an actuation section. In accordance with the forces of the air which engage the actuation section, the control body, with its control section, opens a flowthrough opening in a mixture forming section to a greater or lesser extent. The control body is rotatably supported, concentrically with a throttle valve, and is connected with a metering needle which protrudes through a metering opening, at which point a greater or lesser fuel quantity is metered in accordance with the rotational movement of the control body.

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 fuel injection system for supercharged internal combustion engines is proposed, which serves to meter a quantity of fuel adapted to the quantity of air aspirated by the engine and also serves to regulate the fuel-air mixture in accordance with operating characteristics of the engine. The fuel injection system includes an air flow rate member, the restoring force of which is generated by means of pressure fluid in a control pressure line. The pressure of the pressure fluid in the control pressure line is variable in accordance with at least one pressure control valve, by means of which the pressure in the control line and thus the restoring force exerted upon the air flow rate member, which actuates a control slide of a metering and distribution valve assembly, can be reduced when the intake tube pressure downstream of a compressor increases. The result is that an undesirable leaning down of the fuel-air mixture caused by the error in air density can be corrected.

Abstract: A fuel injection apparatus of the type in which the degree of opening of a fuel measuring gate disposed in a fuel supply passage is controlled by air flow rate detecting means for detecting the rate of flow of air being sucked into an engine, and the amount of fuel is controlled by a solenoid valve adapted to be opened and closed by signals which detect the operating conditions of the engine, thereby compensating the air-fuel ratio, wherein a second solenoid valve is disposed in parallel with the first-mentioned solenoid valve and adapted to be opened and closed by the above-mentioned signals, so as to correct the basic air-fuel ratio which is set in connection with the air flow rate detecting means and the fuel measuring gate, thereby maintaining the air-fuel ratio at a desired constant value.

Abstract: A fuel injection system is proposed which serves to supply fuel to a mixture-compressing, externally ignited internal combustion engine. The fuel injection system includes an air flow rate member, which actuates a metering and distribution valve. A reservoir is disposed in a pressure control line which branches off from a fuel supply line, by means of which reservoir a flushing valve can be affected in such a manner that below a certain fuel pressure in the pressure control line the flushing valve is opened, as a result of which the fuel supplied to the individual injection valves can flow back through outflow lines to the fuel tank and thus closes the flushing valve above the certain fuel pressure. Above the certain fuel pressure, the electrical circuit of the starter motor is simultaneously closed. Thus, upon starting the engine, all the lines and units of the fuel injection system are filled with fuel, so that a secure start is assured.

Abstract: A positioning device for an air valve arranged in the charging air line of a diesel engine, particularly charged by means of a pressure wave-charging device. The air valve or flap is provided with a shutoff valve incorporated into the flow path between an impingement line branching-off from a pressure oil line of the diesel engine and an oil return flow line. The impingement line is connected with an impingement chamber for a positioning piston actuating the air valve or flap. The positioning piston is loaded by a continuously effective force and the shutoff valve is actuated, in order to impinge the positioning piston with oil, in the opening direction of the air valve or flap by a control piston loaded by the pressure in the air charging line against the force of a spring.

Abstract: An engine charge forming device controls the fuel metering orifice area in proportion to the throttled air flow area of the induction passage and controls the pressure drop across the fuel metering orifice in proportion to a vacuum signal which is substantially independent of the compressibility effects of throttled air flow; fuel flow is thereby proportioned to air flow throughout the range of engine operating conditions. Adjustments are provided for varying the fuel metering orifice area to set minimum and maximum fuel flows, and controls are provided for modifying the vacuum signal to vary air-fuel ratio.

Abstract: An apparatus is proposed which serves the purpose of mixture formation for internal combustion engines, in particular mixture-compressing engines with externally supplied ignition. The apparatus includes an air flow rate meter, which has at least one control body opening the intake tube cross section to a greater or lesser extent in accordance with the air flow to the cylinders, the deflection of which control body directly controls a fuel metering valve. The fuel metering valve is disposed on the end of the control body and extends in a direction pointing in opposition to that of the air flow and is embodied as a needle valve having a metering needle and a metering opening. The metered fuel can be ejected directly downstream of the fuel metering valve via one or more nozzle openings.

Abstract: A charge forming device for an air breathing internal combustion engine (10) includes main and mixing air manifold (40) (63) for each cylinder (14), a fuel distribution port (62) in each mixing manifold (63) facing towards the intake valve (30) of each cylinder, with the fuel of each charge being supplied solely through the fuel distribution port and entrained, with a proportion of fuel carrier air supplied by a carrier air duct (54) in communication with the fuel distribution port into the main engine air supply flowing through the main and mixing manifolds. The fuel distribution port is large and is shaped to divert expansion waves induced in the charge upstream of the intake valve by the kinetics of the interrupted charge flow out of the mixing manifold and into a temporary holding area, and to allow compression wave flow of fuel-free air from the main manifold towards the intake valve so that fuel-free air accumulates near the intake valve between engine intake events.

Abstract: A fuel injection system is proposed which brings about an improvement in the acceleration behavior of an internal combustion engine. The fuel injection system includes metering valves actuatable by means of an air flow measuring device, at which valves a pressure difference can be held constant via control valves and the pressure difference is variable in accordance with operational characteristics of the engine. To this end, the control valves are located on a control pressure line in which a control throttle and an electromagnetic valve are disposed. At the same time, pressure limitation elements communicate with the control pressure line and, in the event of acceleration of the engine, reduce the extent of increase of control pressure and thus assure fuel metering corresponding with the operational state of the engine.

Abstract: An apparatus for controlling the composition of the operational mixture in internal combustion engines. Air quantity is controlled to correspond to an arbitrarily settable fuel quantity, by creating a set-point fuel quantity signal from an actual value air quantity signal, via a performance graph, the fuel signal taking the form of a correspondingly set metering cross section in a fuel supply line. A differential pressure valve, connected across the metering cross section, creates a hydraulic control pressure for actuating an air throttle valve in accordance with the deviation of the pressure drop across the metering cross section from a set-point value which is kept constant. During overrunning, the pressure drop becomes zero and the throttle valve is fully opened by hydraulic control pressure supplied through a pressure-actuated valve which opens when the pressure downstream of the metering cross section rises to a value indicating an overrunning condition.

Abstract: An apparatus is proposed for the open-loop control of the composition of the operating mixture to be introduced into the combustion chambers of an internal combustion engine. In this apparatus, the dispensing of the aspirated air quantity is effected by means of an aspirated air throttle device, whose displacement complementarily adjusts the cross section of an exhaust gas recirculation line which discharges into the intake system downstream from this throttle device. The opening of the aspirated air throttle device in order to increase the quantity of aspirated air is effected by means of a control pressure delivered to a servomotor, counter to the force of a restoring spring. The control pressure is obtained from the comparison of the actual quantity of aspirated air with the fuel injection quantity. The initial pressure for establishing the control pressure is the supply pressure of a supply pump supplying the fuel metering device.

Abstract: A fuel supplying device for use in fuel injection type internal combustion engine. The device has a fuel metering device operatively connected to an air valve device disposed in the air horn upstream of a throttle valve, fuel supplying means adapted to supply the fuel at a constant supplying pressure to the fuel metering device, a constant differential pressure valve arranged to maintain a predetermined differential pressure across the fuel metering device, and an injector for discharging the metered fuel into the air horn in the vicinity of the throttle valve. The constant differential pressure valve includes a diaphragm type valve arranged to sense and amplify differential pressure across the fuel metering device, and a variable orifice type flow control device arranged to charge flow resistance of the metered fuel.

Abstract: Problems associated with warm engine starting of spark-ignition internal combustion engines with continuous injection into the intake manifold and fuel injection systems of the type utilizing a measuring element and a deliberately operable power control element connected in series, the measuring element being moved as a function of the air volume through-put so as to displace a fuel valve disposed in a fuel supply line for metering a volume of fuel which is proportional to the air volume and which has a warmup control connected by a control pressure line with the fuel valve and a zero-pressure fuel return line with a fuel tank for enriching the fuel-air mixture during the warmup of the internal combustion engine are avoided according to the present invention by an improvement comprising a bypass line interconnecting the control pressure line of the fuel pressure line in bypassing relationship with respect to the warmup control.

Abstract: An electronic injection carburetor is disclosed. Fuel under pressure is quantized for primary metering by an electronic fuel injector and input to a metered fuel chamber. The quantization occurs by controlling the duration of the opening time of the injector by an electronic control unit responsive to speed and manifold absolute pressure information. Secondary metering is provided as a function of the mass air flow through the throat of the carburetor by an actuator assembly controlling fuel input to the carburetor from the metered chamber. The actuator provides the secondary metering by changing the bias pressure on a flexible diaphragm producing a closure force on a needle valve that varies the flow of fuel from the metered chamber to an atomizing discharge nozzle in the throat of the carburetor.

Abstract: A fuel injection system for controlling a mixture-compressing, externally ignited internal combustion engine which includes a fuel apportionment valve controllable by means of an air flow rate meter, with the fuel pressure upstream of the apportionment point being variable by means of a pressure regulating valve having a movable valve member which separates two chambers connected by a throttle point, and wherein the fuel pressure upstream of the fuel apportionment valve is exerted on one side of the movable valve member, and the force of a spring and a control pressure, which is variable by means of a control element in accordance with operating characteristics of the internal combustion engine, are exerted on the other side of the movable valve member to thereby intervene easily in order to vary the fuel-air mixture using small control forces.

Abstract: An adjustable bellows mechanism in a fuel control apparatus for balancing the internal forces of a valve arrangement to establish a fuel flow from the control apparatus to an engine corresponding to the optimum operational parameter of the engine.

Abstract: A fuel supply system for mixture-comprising, externally ignited internal combustion engines is proposed, which serves to apportion a fuel quantity corresponding to the induced air quantity. The fuel supply system includes an air flow rate meter disposed in the air intake line which actuates a fuel apportionment valve in accordance with the induced air quantity. The restoring force of the air flow rate meter is effected by a control element which is acted upon by pressure fluid, whereby the control element and the pressure control valve each have an air chamber separated from a fuel chamber by a yielding element and in each fuel chamber the same fuel pressure upstream of the fuel apportionment valve and in each air chamber the same pressure in the air intake line upstream of the air flow rate meter prevails as is also effective downstream of the fuel apportionment valve.

Abstract: A fuel injection system for a mixture-compressing externally ignited internal combustion engine includes a flow sensing member (3) arranged in an air intake duct (1), the member (3) moving in accordance with the quantity of air flowing through the duct so as to actuate a fuel metering valve (7) and to dispense a quantity of fuel to fuel injection nozzles (9) of the engine. The pressure difference in the metering valve (7) is maintained constant by means of a pressure sensitive valve (11) and a differential pressure control valve (20), each of which has two chambers separated by a diaphragm (12 and 21). The differential pressure control valve (20) is actuated on both sides by springs (34, 36 and 54) whose loading stress can be varied according to engine operating parameters. The loading stress of the springs is adjusted by devices for full-load fuel concentration and cold-starting fuel enrichment, and also a device responsive to air pressure changes.

Abstract: A fuel injection apparatus for mixture-compressing, externally ignited internal combustion engines with continuous injection into the air induction line adapted to apportion a quantity of fuel proportional to the quantity of induced air and to accomplish good preparation of the fuel-air mixture. The fuel injection apparatus comprises an air flow rate meter arranged in the air induction tube, which moves in accordance with the quantity of air flowing through it against a return force and thereby actuates a fuel apportionment valve. Accordingly, the apportioned fuel flows into a fuel feed line downstream from the fuel apportionment point, which fuel feed line empties on the one side into the air induction line and is connected on the other with a source of air.