Abstract: An idling rpm feedback control method for controlling the quantity of supplementary air being supplied to an internal combustion engine, in a feedback manner responsive to the difference between actual engine rpm and desired idling rpm at engine idle. When the engine is decelerated with the throttle valve fully closed and before the feedback control is started, the supplementary air quantity is controlled in decelerating mode in a predetermined manner while the engine speed drops from predetermined rpm larger than an upper limit of the desired idling rpm range to the same upper limit, and in feedback mode after the engine speed has dropped below the above upper limit, respectively. The feedback control is continued even when the engine speed temporarily rises above the upper limit. In the decelerating mode, the supplementary air quantity is gradually increased with a decrease in the engine rpm.

Abstract: An air induction control device for an internal combustion engine is composed of an air passage for communicating upstream and downstream sides of a throttle valve in an intake passageway when opened, a valve member movably disposed in the air passage to open the air passage in response to pressure differential between the upstream and downstream sides of the throttle valve in the intake passageway, and a diaphragm member mechanically connectable to the valve member so as to open the air passage in response to vacuum prevailing in the intake passageway downstream of the throttle valve, thereby effectively controlling air induction to the engine, even when the throttle valve is closed during normal engine deceleration and at sudden engine deceleration or during operation of engine accessories at idle throttle state.

Abstract: The cross-sectional area of a bypass passage around a throttle valve in an intake passage of an internal combustion engine is additionally increased by a predetermined value only when the throttle valve changes from an open position to the fully closed position during a heavy load condition or during a transitional condition from the heavy load condition to a light load condition. Therefore, the flow rate of the intake air at deceleration is not additionally increased during a light load condition, since that would cause the operation of the engine to be stable during deceleration.

Abstract: An end closure (1) for a pulsing solenoid P attached to a carburetor (C). A unitary cover (3) has a base section (5) configured to fit against an end wall (EW) of a solenoid housing (H). A forwardly extending skirt section (9) fits about the side wall (SW) of the housing adjacent the end wall thereof. The skirt section has a plurality of tabs (11) projecting from the inner wall of the skirt section. The tabs are received in appropriate openings (0) in the side wall of the housing. A connector shield (13) projects rearwardly from the base section of the cover. A pair of electrical connectors (15A, 15B) are mounted in the shield and extend through the base section of the cover. The electrical connectors matingly connect with a pair of electrical connectors (FC) in the solenoid housing and further connect with an electrical cable routed from an electronic control unit.

Abstract: An improved flow-type carburetor for an internal combustion engine comprising an exhaust gas conduit and port for introducing exhaust gas into the area of the carburetor defined between the venturi and the throttle valve and two or more ports for introducing additional air into the area of the carburetor between the venturi and throttle valve.

Abstract: A multicylinder internal combustion engine, especially a self-igniting internal combustion engine, with supply ducts leading to the cylinders which supply ducts emanate from a common fuel supply chamber with the ducts being supplied with a fuel-gas mixture. The fuel-gas mixture is present in a mist form in the supply chamber with the fuel, with a substantially identical droplet size, exhibiting a droplet diameter at which a flow characteristic is obtained for the droplets in the ducts leading to the cylinders which is respectively at least approximately identical to the flow characteristic of the gas. The fuel is fed to the common supply chamber continuously by way of an injection device with the premixed fuel-gas mixture, which is at a pressure elevated with respect to the pressure level in the supply chamber, exiting from the injection device at a speed of sound with atomization of its proportion of fuel, on account of a pressure jump at a cross section of the discharge orifice of the injection device.

Abstract: A device for the control of at least one throttle diameter in a control line, especially in a line carrying fuel for an internal combustion engine, is proposed. The device includes at least one circle segment-like control section in a control bore intersecting the control line, the section pivotable around an axle and opening to a larger or lesser degree the throttle diameter formed by the intersection. The control bore has a circularly arched sealing surface surrounding the throttle diameter extending eccentrically to the axle and with which the control section, also disposed eccentrically to the axle and disposed pivotably, works together in such a way, that the radial distance between the circumference of the control section and the sealing surface is nearly zero when the control section is in a closed position, and increases during a pivotal movement in the direction of opening the throttle diameter.

Abstract: A control device with an electric servo motor is proposed, by means of which a throttle device can be operated, which opens, to a greater or lesser degree, the passage diameter of a flow line, especially the passage diameter of a by-pass line around a throttle valve disposed in the intake line of an internal combustion engine. The control device has an elastic element which moves the throttle device, during an interruption of the current supply to the electric servo motor into a defined position opening the passage diameter of the flow line.

Abstract: A carburetor has an apparatus for compensation of idling revolution of an internal combustion engine. The apparatus comprises a bypass passage one end of which is opened to the air suction conduit of the carburetor upstream of a throttle valve, the other end opened to the same downstream of the throttle valve. A fuel passage supplies fuel into the bypass passage to form a fuel-air mixture, a solenoid valve provided on the bypass passage for controlling a quantity of the fuel-air mixture in response to operation of a load such as, for example, heater, a radiator fan, lights, an air conditioner, etc. so that the idling rotational speed to be decreased by such operations is compensated by supplying fuel-air mixture into the air suction conduit.

Abstract: An electronic control apparatus for an internal combustion engine monitors suction air concentration and an engine operation condition, and applies these values to a control circuit to produce output signals to control the air-fuel mixture to be supplied to the engine. The control circuit calculates a desired mass air flow rate based on at least one parameter representing an operating condition of the engine when the throttle valve is fully closed and controls the actual mass air flow rate bring it the desired mass air flow rate.

Abstract: A balanced dual valve member is positioned by a pressure responsive diaphragm and a solenoid reference device to provide an air flow through an engine throttle bypass passage which does not vary with changes in engine manifold pressure.

Abstract: An engine has a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a stepper motor, is arranged in the bypass passage. The step position of the stepper motor is so controlled that the idling speed becomes equal to a desired speed. When an engine stall takes place and, then, the engine is started again, the step motor is rotated by five steps in a rotating direction wherein the flow area of the flow control valve is increased.

Abstract: A mixture formation system is proposed for mixture-compressing internal combustion engines with externally supplied ignition. The mixture formation system includes an air intake fitting in which an electromagnetically actuatable injection valve is held concentrically, upstream of a throttle valve. Disposed upstream of the injection valve is an air flow rate meter provided with a temperature-dependent resistor. The electronic regulating device of the air flow rate meter and a pressure regulator for regulating the fuel pressure at the injection valve as well as a supplementary air valve for controlling an air bypass bypassing the throttle valve during the warm-up phase of the engine may be provided on the air intake fitting. As a result, a mixture formation system is attained which is simply constructed and functions reliably, and which because of its compact structure can be accommodated in the engine compartment of an internal combustion engine even where space is extremely limited.

Abstract: A fail safe device comprising means for detecting a failure in an air/fuel ratio feedback control system and generating a fault signal when such failure is detected, and means responsive to the fault signal to drive an actuator for driving an air/fuel ratio control valve and also responsive to a reference position signal supplied thereto during the above driving, which is generated when the actuator passes its reference position, to stop the actuator at the reference position.

Abstract: An air/fuel ratio control system for performing feedback control of the air/fuel ratio of an air/fuel mixture being supplied to an internal combustion engine in response to the concentration of an exhaust gas ingredient. The air/fuel ratio control system includes a device for controlling a shot air valve for supplying secondary air into the intake pipe of the engine. The control device is connected to a solenoid valve for controlling the shot air valve and operable to open the solenoid valve to hold the shot air valve inoperative for a predetermined period of time after the engine rpm has increased across a predetermined value which is higher than the engine cranking rpm but lower than the engine idling rpm, to thereby prevent misfire within engine cylinders at the start of the engine.

Abstract: A device to meter and control the flow of a gaseous fuel and air to an internal combustion engine. The portion of the device which controls the flow of gaseous fuel comprises a reservoir chamber linked to a pressurized fuel supply, a plurality of individual chambers equal in number to the number of engine cylinders, demand valves connected to the individual chambers which permit fuel to flow on the intake stroke of each cylinder and valves biased to a closed position between each individual chamber and the reservoir for controlling the flow of gaseous fuel to the individual chambers and a connection for linking the valves to the throttle of the engine to open the valves simultaneously.

Abstract: A method and apparatus for optimum control for internal combustion engines employ computing means with memory means in which the values indicative of ignition timings and air-fuel ratios of an engine are preliminarily stored in the form of maps in accordance with parameters indicative of the operating conditions of the engine. At least one cycle of ignition timing optimization processing and at least one cycle of air-fuel ratio optimization processing are performed alternately so as to control the engine at the optimum ignition timing and air-fuel ratio for minimum fuel consumption.

Abstract: An intake air flow rate control method and system for an internal combustion engine includes an open loop control strategy carried out during unstable engine driving conditions. During open loop control, a pulse signal applied to an air flow rate control valve means is determined both as a function of open loop ratio and feedback ratio. The duty cycle of the pulse signal for open loop control is varied corresponding to engine coolant temperature as well as engine load condition. Thus, open switching control operation from open loop control to feedback control, varying of pulse duty cycle to be applied to the valve means occurs smoothly. Further, in open loop control, the control system smoothly follows variations in engine load conditions.

Abstract: An internal combustion engine includes an intake air passage provided with a throttle valve, and an idling air passage by-passing the throttle valve and provided with an idling air flow rate adjusting device which includes a variable orifice. The orifice is formed by a stationary plate with an opening, and a movable plate in contact with and slidably movable with respect to the stationary plate. The two plates consist of this sheet material to prevent accumulation onto the surface of the orifice, of dust and oil particles contained in the intake air. The device further includes an adjusting screw connected to the movable plate to move the same with respect to the stationary plate to thereby adjust the opening degree of the opening in the stationary plate.

Abstract: An idling speed control device of an internal combustion engine comprising a bypass passage which interconnects the intake passage located upstream of the throttle valve to the intake passage located downstream of the throttle valve. A flow control valve is arranged in the bypass passage and actuated by a step motor for controlling the amount of air flowing within the bypass passage to maintain the idling speed of an engine at a predetermined speed. A cooling water passage is formed in the valve housing of the flow control valve.

Abstract: A device for correcting the combustion of internal combustion engines, in particular automobile engines, the internal combustion engine having an intake manifold, the device including a first sealed chamber directly connected to the intake manifold, a second sealed chamber separated from the first chamber by a diaphragm having a neutral position, the second chamber being connected to the first chamber through a passage for delaying transmission of pressure variations from the first chamber to the second chamber, a control device for reducing the fuel to air ratio of the air and fuel mixture, the control device being coupled to the diaphragm for activation by the diaphragm whenever the differential pressure between the first and second chambers exceed a first predetermined value and whenever the differential pressure exceeds a second predetermined value.

Abstract: An engine has a main intake passage in which a throttle valve is disposed. A bypass passage is branched off from the main intake passage upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a stepper motor, is arranged in the bypass passage. In an electronic control unit, the mean value of the step position is stored, and a lower limit of the step position is calculated from the mean value of the step position. When the engine is idling after it has been and the stepper motor is rotated in a direction wherein the flow control valve closes the rotating operation of the stepper motor is stopped when the step position of the stepper motor reaches thelower limit of the step position. This allows for precise control of the flow control valve, while preventing the sudden rapid closing of the valve, thus improving engine performance.

Abstract: A method of electronically controlling fuel injection in an engine including a bypass line running in parallel to the portion of an intake passage in which a throttle valve is provided. The communicable cross sectional area of the bypass line is controlled so as to maintain the idling speed of an engine at a predetermined desired value. When the engine temperature is higher than a predetermined value, the engine is idling and the communicable cross sectional area of the bypass line is being controlled, a value is stored related to the mean value of the flow rate of intake air or the mean amount of fuel being injected into the engine. When the engine is later being started, when the engine temperature is lower than a predetermined value, or when the engine is accelerating while the engine temperature is yet lower than a predetermined value, the amount of fuel to be injected is calculated by using the value thus stored as a parameter to compensate for internal friction in the engine.

Abstract: An adjustment device having a servomotor and arranged for rotary angle adjustment is proposed. The rotary portion is connected via a shaft with a throttle device which controls the cross section of a bypass line bypassing a throttle valve disposed in the intake tube of an internal combustion engine. The adjustment device is axially limited on one end by a cap, which is embodied as a cast part together with a portion of the bypass line. The throttle device is embodied as a rotary slide and with a control portion transversely penetrates the cap and the bypass with the control portion arranged to open the bypass to a greater or lesser extent depending on the position of the rotary slide. Between an armature of the servomotor and the rotary slide, a sealing disc is loosely guided on the shaft. As a result of a pressure drop at the sealing disc, the sealing disc can be pressed against a sealing face of the cap in order to keep the leakage air quantity as small as possible.

Abstract: A fuel injection apparatus for externally ignited internal combustion gas engines is proposed. The fuel injection apparatus comprises an intake pipe in which an air flow meter and a throttle valve are provided. The fuel quantity injected into the intake pipe via an injection valve is controlled by the air flow meter. To prepare the combustible mixture of injected fuel and air, a preparation air line branches off from the intake pipe between the air flow meter and the throttle valve. This preparation air line discharges into the injection valve. A throttle is provided in the preparation air line. A full-load air line discharges into the preparation air line between the throttle and injection valve. A shut-off valve is provided in the full-load air line, said shut-off valve being completely open at least during the full-load operation of the combustion engine, allowing additional air flow into the preparation air line, which air is drawn from the intake pipe upstream of the air flow meter.

Abstract: An electromagnetically controlled fuel injection system which includes a mechanism for sensing a plurality of operating conditions of a combustion engine and for generating a plurality of electric signals corresponding to the conditions, an electrical control unit receiving the first electric signals to thereby generate a second electric signal in response thereto, an electromagnetically controlled fuel injection valve mechanism controlled by the second signal from the electrical control unit and having a fuel injection port formed therein and an electromechanically controlled air supply valve mechanism provided with an air supply port around the fuel injection port of the fuel injection valve and controlled by the second signal from the electric control unit.

Abstract: The sectional area of an air bypass passage which bypasses a throttle valve in an intake passage of an internal combustion engine is increased or decreased depending upon the difference between the actual rotational speed of the engine and the variable reference rotational speed. The variable reference rotational speed is additionally increased by an incremental value during the starting of the engine.

Abstract: An apparatus is proposed which serves to regulate the idling rpm of an internal combustion engine. The apparatus includes a bypass line bypassing an arbitrarily actuatable throttle valve in the intake tube. An electromagnetically actuatable bypass valve is disposed in the bypass line for the purpose of controlling supplementary air and is triggerable in accordance with operating characteristics of the engine. In addition, a pressure-sensing adjusting element is also provided, which responds to an abrupt reduction in the intake tube pressure downstream of the throttle device. In accordance with the magnitude of the pressure reduction, this pressure-sensing adjusting element effects a time-limited increase in the supplementary air quantity to the intake tube section downstream of the throttle valve.

Abstract: An idling rotational speed control device wherein, when an engine ignition switch is turned off, an air flow rate control device is driven to a fully closed position or a fully opened position, and the air flow rate control valve is controlled referenced from the fully closed position or the fully opened position as the new reference position. During idling, the flow rate of air taken into an intake manifold is controlled by the intentional opening degree from the reference position of the air flow rate control valve so as to correctly perform control.

Abstract: An idling speed control device of an internal combustion engine having a bypass passage which interconnects the intake passage located upstream of the throttle valve to the intake passage located downstream of the throttle valve has a flow control valve device arranged in the bypass passage and actuated by a stepper motor for controlling the amount of air flowing within the bypass passage to maintain the idling speed of the engine at a predetermined speed. The flow control valve device comprises a valve chamber having an air inlet opening and an air outlet opening which is connected to the intake passage located downstream of the throttle valve. The air inlet opening is formed on the inner bottom wall of the valve chamber and connected via the bypass passage to the intake passage located upstream of the throttle valve.

Abstract: In a closed loop idle engine speed control system the actual engine speed is compared with a reference idle speed during engine warm-up periods to control the amount of an air flow introduced to the engine through an auxiliary air delivery system so that the difference between the actual and reference engine speeds is reduced. The reference setting of the idle speed is varied as a function of the engine temperature in order to vary the actual engine speed in response to an increase in the engine temperature. The auxiliary air delivery system includes a linear solenoid type electromagnetic valve which comprises a spring-biased valve member normally maintained in a neutral position with respect to the valve seat to allow introduction of a predetermined amount of auxiliary air to the engine and a pair of coils energized respectively with a current representing the difference in engine speed to move the valve member in opposite directions to increase or decrease the auxiliary air supply.

Abstract: An idling speed control device of an internal combustion engine comprising a bypass passage which interconnects the intake passage located upstream of the throttle valve to the intake passage located downstream of the throttle valve. A flow control valve is arranged in the bypass passage and actuated by a step motor for controlling the amount of air flowing within the bypass passage to maintain the idling speed of an engine at a predetermined speed.

Abstract: An apparatus and a method of saturating liquid fuel with air, oxygen, or another gas for injecting into an internal combustion engine. The internal combustion engine is provided with a gas compressor or pump for compressing air or oxygen, which is directed into a fuel saturator having a dense, porous material or stone therein and having a liquid hydrocarbon fuel being fed therethrough. Compressed gas is fed onto one side of the stone and is forced therethrough for saturation into the liquid fuel, which is then fed into a fuel injection system of an internal combustion engine. Gas that separates from the liquid fuel is trapped and vapor is removed therefrom. The fuel saturator uses a gas saturation stone, which may be hollow in one end for feeding a compressed gas thereinto, while the other side is surrounded with the liquid hydrocarbon fuel. The liquid hydrocarbon fuel may be fed around a spiralling passageway adjacent the stone for a more complete saturation of the fuel.

Abstract: A system for controlling the idling engine speed (output) of an internal combustion engine (controlled device) in an automotive vehicle in either open-loop or feedback control mode is disclosed. In the open-loop control mode, the control operation is based on the cooling water temperature of the engine, in the feedback control mode, the control operation being based on the deviation of an actual engine speed from the reference (input) engine speed. In some conventional systems, there is provided a time delay between the transfer of control from open-loop control to feedback control. However, according to the present invention there is provided a means for supplying instantaneously an additional intake air flow quantity to the engine in addition to the intake air quantity required in the feedback control mode at the instant when the control mode is transferred from the open-loop to feedback control.

Abstract: An improved internal combustion engine having a means for heating the fuel-air mixture by injecting hot air into the carburetor, said hot air having a temperature of at least 150.degree. F. whereby the fuel and the fuel-air mixture is volatilized and the fuel-air mixture is heated to impart turbulence to the fuel-air mixture.

Abstract: A fuel supply system is proposed for mixture-compressing internal combustion engines having externally supplied ignition. The fuel supply system includes an air intake tube delimited by an air filter, the air intake tube having a conical section downstream of which an arbitrarily actuatable throttle device is disposed. Associated with the conical section of the air intake tube is an air bypass line in which an air flow rate meter provided with a temperature-dependent resistor is disposed. The quantity aspirated by the engine is determined by this air flow rate meter. A fuel injection valve is disposed in such a manner that on one side it protrudes into the interior of the air filter and on the other side, with a slender mouthpiece, it protrudes approximately through the conical section. The fuel can be injected into the gap between the throttle device and the air intake tube wall by means of this mouthpiece. The fuel supply system according to the invention has a very low structural height.

Abstract: A liquid fuel vaporizing carburetor for an internal combustion engine including a housing having a fuel reservoir, a filter assembly including a plurality of filters of progressively smaller pores positioned in said housing; one of said filters being immersed in the fuel reservoir, a baffle for drifting incoming air into the filter in the reservoir and secondary air into openings in the housing to add secondary air to the air-fuel mixture as the air-fuel mixture passes through the filter assemblies.

Abstract: An idle control system for an automobile internal combustion engine includes an idle control unit for controlling the operation of an electromagnetically operated actuator. While the engine has a combustible mixture intake passage leading to the engine and a throttle valve operatively positioned inside the mixture intake passage for controlling the flow of a combustible air-fuel mixture towards the engine, the actuator is utilized to adjust either the effective cross sectional area of a bypass air passage leading from the air source to the mixture intake passage at a position downstream of the throttle valve or the opening of the throttle valve, to control the engine speed during idling to a predetermined value.

Abstract: An adaptive charge forming system for an internal combustion engine is disclosed which monitors a parameter of engine combustion efficiency, such as power output, and derives a signal indicating the direction and amplitude of power change. The fuel mixture control system responds to changes in power output, regardless of their source, to maintain the engine air/fuel ratio in a preferred region. In a preferred embodiment, engine crankshaft angular acceleration is monitored to maintain the air/fuel mixture at the lean limit. A stepping motor is used to control a value for bleeding additional air into the charge; a clock provides steady pulses to the motor, tending to lean the mixture, while enrichment is effected upon the detection of each weak combustion event. The clock frequency thus sets the equilibrium rate of weak combustion events, defining the optimal mixture to be supplied to the engine.

Abstract: Idle speed of an internal combustion engine is adjusted by applying a drive signal having a predetermined value to a flow rate control mechanism which is disposed in a main bypass passage bypassing a throttle valve while the flow rate control mechanism is energized by the drive signal to operate the engine at close to a desired idling speed, a flow rate adjustment screw in a second bypass passage also bypassing the throttle valve is adjusted to cause the actual speed of the engine to become equal to the desired idle speed.

Abstract: A fuel injection valve is proposed which, especially in low-fuel-pressure systems, serves to inject fuel into the intake tube of a mixture-compressing internal combustion engine with externally supplied ignition. The fuel injection valve includes a fixed valve seat cooperating with a movable valve element, downstream of which the fuel to be injected is carried into a mixture guidance channel of a mixture guidance tube and surrounded on all sides with air or exhaust gas for preparation immediately upon its entrance into the mixture guidance channel and injected via an injection opening into the intake tube. The mixture guidance channel may be embodied as tapering in conical fashion toward the injection opening. For the purpose of preliminary preparation of the fuel, secondary air or exhaust gas can already be delivered to the fuel before its entrance into the mixture guidance channel.

Abstract: An internal combustion engine comprising a main intake passage supplying air-fuel mixture to a combustion chamber, an auxiliary intake passage supplying air or an air-fuel mixture to the combustion chamber through an injection port, a fuel supplement passage for supplementally supplying fuel to the auxiliary intake passage, a solenoid valve provided in the fuel supplement passage, and a control device for controlling opening and closing of the solenoid valve in response to a signal from an oxygen sensor disposed in an exhaust passage, said solenoid valve controlling supply of fuel to the auxiliary intake passage, thereby regulating an overall air-fuel ratio of the mixture supplied to the combustion chamber approximately to a stoichiometric air-fuel ratio.

Abstract: A vehicle is driven by an internal combustion engine having an air induction passage with an idle air control valve positionable by a stepping motor in response to valve opening and valve closing pulses. A counter normally counts the pulses arithmetically to provide an indication of valve position. In order to bring the counter and valve position into accord, counter reset apparatus is effective, when actuated, to generate a predetermined number of valve closing pulses sufficient to stall the stepping motor against the stop, reset the counter to a predetermined reference count and generate a predetermined number of valve opening pulses to return the idle air control valve to a desired operating position with the counter counting such pulses in the normal manner.

Abstract: A dished screen placed in engine intake manifold openings beneath a carburetor in the path of intake air flow with, under a one-barrel carburetor one recess dished screen being used, and with a two-barrel carburetor two recess dished screens being used. The screen units are positioned so that fuel laden air from the carburetor passes through screening of the screen units with the mesh and wire size of the screening coupled with depressed dished shape of the screen units such as to optimize vaporization atomizing of fuel in the fuel air mixture being fed to the engine. The proper shape and screening size of the dished screen units is an excellent trade-off of intake air/fuel mixture flow obstruction for more efficient fuel utilization resulting in more power and significantly improved mileage and decreased undesired emissions.

Abstract: A valve system for regulating the idling speed of Otto engines, particularly automobile engines, by controlling the amount of air on an outlet side with an electromechanical setting member which comprises a valve element which limits the effective outlet cross section, the valve element being moveable by an electric drive member and being in communication on one side with the outlet side, and having a circuit which controls the setting member as a function of the speed of rotation. The valve element is mounted substantially free of friction and means are provided for exerting on the valve element a compensating force which opposes the force caused by the suction vacuum.

Abstract: An auxiliary air inlet fuel saver device for internal combustion engines which includes a body member for mounting between a carburetor and intake manifold of an internal combustion engine which has at least one throat aperture with an auxiliary air inlet hole extending from externally of the body member to the throat aperture, the air inlet hole being at an angle of approximately 45.degree. to the central point of the throat aperture, an adjustable valve aperture directly in line with the center point and meeting with the exit opening of the additional air hole, an adjustable valve member mounted in the valve aperture for controlling the air flow into the body member throat, and hosing connecting to the air filter as usually associated with the engine carburetor for providing filtered air to the device.

Abstract: An improved air intake arrangement for Diesel engine in which an intake air shutter valve is provided in an intake air passage of the engine for closing the intake air passage when the degree of depression of an accelerator pedal is small, especially in engine idling and speed retardation, i.e. during non-load period, so as to reduce engine vibrations and noises during light-load operation by throttling the intake air passage or reducing the substantial effective passage area, and also deterioration of combustion is prevented by reducing throttling effect of the intake air shutter valve or increasing the passage area during cold period of the engine, while braking effect of an exhaust brake is maintained also by reducing throttling effect of the shutter valve or increasing the passage area.

Abstract: A fuel supply apparatus in an internal combustion engine in which a venturi provided in the intake passage of the engine is provided with a fuel discharging opening, and the discharge opening is in communication with a fuel-air mixture producing source at which the fuel-air mixture is produced by mixing the external air and the injection fuel injected from a fuel injection nozzle.

Abstract: An air valve means is shown as having a pressure responsive diaphragm positioned valve member which is positioned as to supply controlled rates of engine idle air flow to the associated combustion engine; the positioning of such valve member is in response to forces created as by pressure differential, across the diaphragm, the magnitude of which is controllable by associated control apparatus responsive as to indicia of engine operation.

Abstract: A fuel injection valve which serves in low-pressure fuel systems to inject fuel into the intake tube of a mixture-compressing internal combustion engine having externally-supplied ignition. The fuel injection valve includes a fixed valve seat cooperating with a movable valve element. Downstream of the valve seat, the fuel to be injected proceeds by way of a nozzle into a mixture guidance conduit, which communicates in the immediate vicinity of the nozzle with an intake passage downstream of a throttle valve of the intake passage. Likewise discharging at the mouth of the mixture guidance conduit into the intake passage is an annular conduit surrounding the mixture guidance conduit. Preparation air or exhaust gas can be delivered by way of this annular conduit in such a way that it envelops the injected fuel on all sides. The end of the annular conduit discharging into the intake tube is embodied as a throttle restriction.