Abstract: A fuel injection pumping apparatus has a high pressure pump to which fuel is supplied by a low pressure pump, the output pressure of which is controlled. The high pressure pump includes a piston which controls the timing of the high pressure pump. The pressure applied to the piston is controlled by valve means which includes a valve member biased by a spring. A solenoid is associated with an armature connected to the valve member and when the solenoid is energized the valve member is moved to increase the pressure applied to the piston. The valve member is also subjected to the fuel pressure developed by the low pressure pump and in the event that the flow of current in the solenoid ceases the valve member can move against the spring to allow a controlled pressure to be applied to the piston.

Abstract: Supercharging pressure produced by a supercharger driven by the exhaust gasses is detected so that frequency of combustion in an internal combustion engine is reduced to lower the engine output power. In order to reduce the frequency of combustion, the number of times of fuel injection may be thinned out or fuel injection into one or some of the cylinders of the engine may be stopped for a given period of time. Alternatively, the frequency of ignition may be reduced or ignition in one or some of the cylinders may be stopped for a given period of time. The control of fuel injection and the control of ignition may be combined. A microcomputer may be used to perform the method according to the present invention where the microprocessor thereof is arranged to execute a main routine and an interrupt service routine. In the main routine, data related to the supercharging pressure is stored in a memory, and the interrupt service routine, fuel injection and/or ignition is performed.

Abstract: A fuel pump control system for use in an internal combustion engine having fuel injection valves each disposed to be driven by a command signal indicative of a required quantity of fuel being supplied to the engine, corresponding to operating conditions of the engine, and a fuel pump for supplying pressurized fuel to the fuel injection valves, wherein the control system controls the operation of the fuel pump. The control system includes at least one abnormality determining means which is adapted to monitor the above command signal and a signal indicative of the operative state of a corresponding one of the fuel injection valves, and generate an abnormality-indicative signal after the levels of the two signals have become out of a predetermined logical relationship, whereby the fuel pump is rendered inoperative by the abnormality-indicative signal.

Abstract: A means to cut off the feeding of combustible fluid under pressure to an injector needle of a diesel engine which is stuck in the open position.The end portion of a push rod which insures the closing of the injector needle under the push of a spring includes a throat which it slides across an orifice of a predetermined cross-sectional area of value S. The orifice is in communication with a chamber wherein is mounted a differential piston. The chamber also is connected to a discharge passage by a calibrated orifice whose cross-section S is directly related to the cross-section of the orifice. At the end of each injection stroke, the throat terminates communication with the orifice of cross-section S and the pressure in the chamber is reduced before the piston is displaced.

Abstract: A control apparatus for a fuel metering system including a fuel pump is proposed, where in the case of a Diesel engine with insufficient voltage during starting, the final control element for the governor rod of the fuel pump is uncoupled from the signal processing unit and connected directly to a supply voltage line. It is thereby possible to prevent indefinite output signals of the signal processing unit, which appear in case of insufficient voltage, from having any effect, and simultaneously it is possible to attain reliable starting of the engine.

Abstract: An engine protective device that is reponsive to low oil pressure to cut off or limit fuel flow to avoid or minimize the chance of engine damage. A spring-biased elongate main valve member includes an axial bore and an override spring-biased ball valve to selectively allow fuel flow through said axial bore. A remote override function is realized by use of a bypass valve controlled by a pneumatic or electrical switch. An override lock prevents a mechanical, local (i.e., not remote) override from being changed from an override position back to a normal or off position in the event of insufficient oil pressure.

Abstract: A vehicle height adjusting apparatus includes a height adjustor receiving therein or exhausting therefrom pressurized air to adjust the height of a vehicle, an air compressor for supplying pressurized air to the height adjustor, a temperature detector for detecting the temperature of the air compressor, and a control device including an actuating circuit for operating the air compressor and a memory circuit receiving a signal from the temperature detector to stop the operation of the actuating circuit when the temperature detected by the temperature detector exceeds a predetermined level.

Abstract: A system for preventing engine overheat in a vehicle such as a motor scraper or the like having a front engine and a rear engine mounted thereon. An actuator is operatively connected to the rear engine for controlling speed thereof and also is connected to a source of pressurized fluid through a solenoid-operated valve. A plurality of detectors are mounted in the rear engine each detecting a preset abnormal condition of the rear engine. Provided in the system is a relay responsive to a signal from the detectors for simultaneously turning on a warning lamp and energizing the solenoid-operated valve thereby blocking communication between the source of pressurized fluid and the actuator, thereby reducing the speed of the rear engine to its idle speed.

Abstract: Device for stopping a fuel injection internal combustion engine by turning a key in a stopping box into the STOP position. In hitherto known devices, when turning the key into the said position, current feeding the coil of the electromagnetic valve during the operation of the engine is cut off, and this valve is closed then by means of a prestressed spring. This makes impossible a free outflow of fuel leaving the reducing valve of a low pressure circuit of the injection device, and directs all fuel delivered by a delivery pump into a hydraulic member, the piston of which, by means of fuel pressure, shifts the control bar into the position STOP; in this way the engine is stopped. Such known arrangement requires too much power, since the coil of the electromagnetic valve is energized by current all during the operation of the engine. In accordance with the invention the coil of the electromagnetic valve is deenergized current during the operation of the engine.

Abstract: The disclosure illustrates a means for automatically controlling the operation of a cylinder deactivating system in a multicylinder compression ignition engine which system is intended to increase the load on the cylinders that have not been deactivated. The control means is responsive to coolant pump output pressure which varies directly as engine rpm varies. The cylinder deactivating system functions either by cutting off the flow of fuel to the injector for each deactivated cylinder or cylinders or by actuating an engine brake system. The control means automatically stops the operation of the cylinder deactivating system when engine rpm increases to the point that the coolant pump output pressure exceeds a threshold level. This prevents any possibility of injector scuffing or loss of power at higher rpm.

Abstract: Normally, an air-fuel ratio is controlled in accordance with the engine speed and the intake air quantity of an internal combustion engine with a turbocharger. When the output pressure of the turbocharger increases excessively, an intake relief valve opens to decrease the intake air quantity. In this case, the fuel injection quantity is controlled solely in accordance with the engine speed.

Abstract: A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprises an injection pump to which fuel is supplied by a low pressure pump. A part of the injection pump defines a surface against which a control pressure can act to vary the amount of fuel supplied by the injection pump, the part being spring loaded by a spring in a direction to oppose the force exerted by the control pressure and to increase the amount of fuel supplied. The control pressure is derived from the low pressure pump by means of a control system and if the output pressure of the low pressure pump should fall due to for example fuel starvation, the part will move in the direction to increase the amount of fuel supplied by the apparatus, this being permitted even though the output pressure is reduced.

Abstract: A bulkhead-fluid-line connector (10) is disclosed for supporting and directly sealably connecting two fluid lines (20,22) which conduct a pressurized fluid, such as fuel, through a housing wall (16) of an internal combustion engine (18).Unlike conventional bulkhead-fluid line adapters or unions which have a plurality of fluid supply path joints, the connector (10) requires only one fluid supply path joint by directly and sealably connecting the end portions (52,54) of the respective fluid lines (20,22) with a releasable coupler (56).

Abstract: A two-cycle engine having an oil pump (19) driven by the engine crankshaft (11) to supply lubricant to the carburetor (12) has an alarm system to warn of an interruption of the oil pump drive. The alarm system has a signal processor (23) connected to activate an alarm (27) should signals from an oil pump rotation sensor (26) be interrupted, if a level switch (28) in the oil tank (20) indicates a low oil level, or should a signal from the ignition system (14) be interrupted. The signal processor (23) is also connected to briefly activate the alarm (27) when the engine is started to provide a test of the alarm system.

Abstract: A vehicle ignition system comprises a transformer having a primary winding and a secondary winding for providing the desired high voltage to the spark plug of the vehicle engine and a circuit including a further winding for said transformer connected across a switch and a load. The switch is operable only by a security device and when it is closed, the load absorbs energy from the transformer so that insufficient voltage is generated at the spark plug and the vehicle is immobilized. The load can be replaced by a reverse flux generator, the reverse flux opposing that generated by the primary winding. The security device may comprise a conventional key and keyhole, or more sophisticated devices such as code readers which read a code inputted from a magnetic card or from a keyboard. Further security may be provided by a further switch in series with the primary winding and battery, the further switch being operable in synchronism with and in the opposite sense to the first mentioned switch.

Abstract: A fuel flow regulator for an internal combustion engine having an exhaust gas turbocharger is disclosed. The fuel flow regulator responds to intake manifold pressure. Thus the fuel flow regulator increases the maximum fuel flow to the internal combustion engine from a first maximum predetermined fuel flow rate when the intake manifold pressure is at a first predetermined intake air pressure level to a second predetermined maximum fuel flow rate when the intake air manifold pressure is at a second predetermined intake air pressure level. Additionally, the fuel flow regulator decreases fuel flow to a third maximum fuel flow rate which is less than the first predetermined maximum fuel flow rate when the intake manifold pressure is greater than the second predetermined intake air pressure level. Therefore, the fuel flow regulator protects the internal combustion engine from overboost of the engine by the turbocharger and for overfueling the engine.

Abstract: Internal combustion engine protection systems including visual and audible signals responsive to operative conditions of at least coolant level, engine temperatures, high and low oil pressures and, in the case of turbo chargers, to air intake pressures. An engine disabling means is operative when any of the aforegoing conditions exceed predetermined limits for a predeterminable period. Override means, effective for only a limited duration, permits emergency engine operation even if one or more of said predetermined limits have been exceeded for said predeterminable period so as to ordinarily incur engine disablement.

Abstract: A liquid fuel pumping apparatus for supplying fuel to a multi-cylinder engine has a plurality of outlets for connection to the injection nozzles of the engine. The apparatus includes a spill passage and a spill control valve which is electrically controlled. The valve is closed to cause fuel from a high pressure pump to be delivered through the outlets, fuel being supplied by the high pressure pump to the outlets in turn. A pressure transducer provides signals indicative of the pressures attained in the various outlets during delivery of fuel therethrough. One of the pressure signals serves as a standard and the other signals are compared with this signal to produce correction signals which vary the time the spill valve is closed when fuel is supplied to those outlets to which the other signals pertain.

Abstract: An emergency air shutdown system for diesel engines which has air intake manifold and curved discharge tubes leading into the manifold for a plurality of cylinders, the system comprising a valve member for each discharge tube and pivotal mounting means therefor to cause movement of the valve member about an axis substantially parallel to the air flow through the discharge tube between an open position outside the path of air flow and a closed position across the tube to block the air flow. Locking means are provided for keeping the valve in an open position, and activating means are provided to effect release of the locking means so as to permit rapid movement to the closed position across each tube.

Abstract: A transport refrigeration unit powered by a two speed prime mover and having the capability of providing at least four modes of operation is controlled by an arrangement as shown in FIG. 2 which provides for operation in either a continuous cycle in which the prime mover runs continuously to provide the modes shown in FIG. 3 or, alternatively, operates in a start-stop cycle to provide the modes of operation shown in FIG. 4. The control in both of the cycles of operation provide for delays in the change of speed from low to high upon certain departures in temperature from one temperature band to another band which would normally call for high speed operation.

Abstract: An air intake filter for internal combustion engines designed to prevent the escape of fuel fumes to the atmosphere, the filter cartridge including a rectangular block-shaped filter body folded of filter paper with horizontal top and bottom fold edges, the fold cavities on the downstream side of the cartridge being filled with activated carbon which is retained by a cover layer of fiber fleece. The outer edges of the filter body and of the cover layer are embedded in a resilient sealing collar. The longitudinal extremities of the fold cavities are closed by fold pockets.

Abstract: A hose joint, used in the neighborhood of a radiant heat source such as an exhaust manifold in a vehicle for example, having on one end thereof a hose attaching portion and on the other end a fixing portion, provided with a sheltering cover secured on the hose joint in the middle between the hose attaching portion and the fixing portion for being interposed between the radiant heat source and the hose so as to protect the latter from the former's heat. The sheltering cover is a metallic plate which is metal-plated for effectively reflecting the radiant heat; it is preferably disposed perpendicularly to a line linking the hose attaching portion and the radiant heat source irrespective of the shape of the hose joint, for example, straight or bent.

Abstract: An automatic engine stop and start apparatus for automatically stopping and starting an engine is disclosed. When a car starts to move while the engine has been automatically stopped and the car is to be braked, and a car velocity exceeds a predetermined speed and a booster pressure of a brake falls below a predetermined level, the apparatus issues an alarm. To this end, the apparatus includes a car velocity sensor for detecting the car velocity, a slope sensor for detecting the necessity of the brake for the car, a negative pressure switch fordetecting the booster pressure of the brake and alarm means responsive to detection outputs of those sensors.

Abstract: A system provides automatic starting of a locomotive diesel engine if the temperature drops toward freezing, which could damage the engine because of its water cooled nature, thereby saving fuel otherwise required when an engine is permitted to run continuously. Temperature sensing devices sense the temperature in the cooling water to sense a starting temperature, a shut-off temperature and a still lower temperature at which to provide an audible warning and drain the cooling water if freezing should be imminent. A circuit including a time delay relay is responsive to the sensing of the temperature at which starting is to be carried out for causing connection of the normally disconnected battery and energizing of the engine starter to initiate engine operation.

Abstract: This invention relates to a method of detecting the presence of a conductive fluid such as water in a chamber such as the oil pan of an internal combustion engine and apparatus for carrying out the method. A resilient flexible sensor probe is mounted in the oil drain and electrically connected to an alarm which is activated by current flow. The sensor probe has an outer electrode member with a portion formed of a helical coil through which an insulated wire runs to form an inner electrode member. The inner electrode member is connected to the alarm, while the outer electrode member is grounded to the engine. The sensor probe bends to a position where its inner end portion depends into contact with the bottom of the oil pan. The inner electrode member ends at a bare tip which is surrounded by an insulative sleeve which prevents direct contact with the bottom of the oil pan. The outer electrode member ends at a bare wire portion which is spaced a short distance from the tip of the inner electrode member.

Abstract: An engine protective device that is responsive to low oil pressure to cut off or limit fuel flow to avoid or minimize the chance of engine damage. A spring-biased elongate main valve member includes an axial bore and an override spring-biased ball valve to selectively allow fuel flow through said axial bore. A remote override function is realized by use of a bypass valve controlled by a pneumatic or electrical switch. An override lock prevents a mechanical, local (i.e., not remote) override from being changed from an override position back to a normal or off position in the event of insufficient oil pressure.

Abstract: The present invention relates to a control device for an auxiliary member of vehicles which is capable of suspending the driving of the auxiliary member of a vehicle such as a compressor for air conditioning device when there is a sudden increase of the load on the driving system of the vehicle and which is also capable of driving the auxiliary member as much as possible when the engine is operating below its maximum capacity. The control device comprises a means to detect the load of the driving system of a vehicle and the rate of acceleration of said load, a means to control the driving of an auxiliary member which is driven by the engine of the vehicle, and a means to transmit a signal to the driving mechanism of said auxiliary member to suspend its driving from the time when the acceleration of the load of the driving system of the vehicle exceeds a predetermined value until the time when the load returns to the predetermined value.

Abstract: Inversion-protection of an outboard marine engine is achieved by fitting inside the engine casing watertight boxes to enclose the water-sensitive electrical components, i.e. the engine starter solenoid and the power pack. The starter motor spindle is provided with a shaft seal and the engine exhaust is fitted with an exhaust pipe in the form of a vertical hairpin or U-tube. The engine air intake box has fitted inside it a horizontally sliding valve that is automatically closed by a vertically-sliding weighted wedge engaging the valve rod.

Abstract: This invention relates to an automatic stopping device for stopping a diesel engine through cutting off the fuel supply to the latter upon detect of an accidental reversing of the diesel engine. The reversing of automobile diesel engines is rather easy to occur. In the event of an accidental reversing of the diesel engine, it is necessary to stop the engine immediately, for otherwise the engine may be damaged seriously. According to the invention, the reversing of the diesel engine is detected through the detection of change of phase relation between two phases of output voltage derived from a multi-phase alternator connected to the engine and for charging up the batteries, the change of phase relation occuring when the engine is accidentally reversed.

Abstract: An internal combustion engine overspeed protection system utilizes a spring-actuated expandable overspeed link in the fuel control linkage to shut off fuel independently of governor or throttle action. The link is normally latched in a contracted condition and positioned in the fuel linkage between a manual fuel lever and the fuel cranks for the respective cylinders of the engine. An automatically resetable hydraulic actuating device unlatches the link in high speed response to an engine overspeed condition. A spring coupling in the fuel linkage permits relatching of the overspeed link by manipulation of the fuel lever.

Abstract: Fittings with internal drain passages leading to the outside through an exterior orifice are normally used in high pressure fluid systems where fluid must be transferred through a wall and leakage on at least one side of the wall cannot be tolerated. Such fittings are used, for example, in compression ignition engines where the fuel injectors are located inside of the valve cover. Any leakage drains from the exterior orifice of the fitting down the outside of the engine. On some installations the side of the engine on which these fittings are mounted must be located out of sight of the operator and the operator is unable to observe if any leakage is occurring. The present invention overcomes this problem by providing a fitting (12) that drains into a drain passage (64) that is located within the engine wall (7, 11). The drain passage (64) in the engine wall (7, 11) is routed within the engine (4) to the most convenient drain point (80) for monitoring.

Abstract: A control system for the fuel pump of an internal combustion engine includes a fuel determining network which controls the conduction of an output transistor by way of an input transistor. A transducer provides an operator demand signal to the network. In the event of failure of the network the transducer is arranged to control the supply of base circuit to the output transistor so that the conduction of the output transistor is directly controlled. The output transistor controls the flow of current in the winding of an actuator for the control member of the fuel pump.

Abstract: A fluid temperature monitor coupled into the engine coolant fluid circuit of an internal combustion engine includes a thermostat which is responsive to overheating of the fluid to operate a plunger so as to actuate a first switch upon overheating of the fluid to sound a warning alarm and a second switch to turn off the engine.

Abstract: A fuel injection pump for supplying fuel to an internal combustion engine includes a plunger reciprocable within a bore by cams on a cam ring. Fuel is supplied to the bore by a throttle. A first valve is provided which connects a point intermediate the throttle and the bore with a drain. A second valve is provided to ensure that the pressure applied to the outer end of the plunger is above said drain pressure. When the first valve is opened the pressure acting at the outer end of the plunger will move it inwardly to ensure that it cannot be actuated by the cam.

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 industrial tractor is provided with a fuel system including a fuel tank connected to a fuel pump mounted on the tractor engine. The fuel line includes a section of rubber hose at the end which is connected to the fuel pump while the remainder of the line is metal. A fuel shut-off valve is located in the metal portion of the line. A heat sensitive actuator automatically shifts a spool of the valve from a normal, open position to a closed position in response to being subjected to a relatively high temperature indicative of the existence of a fire in the engine compartment. Thus, fuel in the tank is prevented from feeding the fire in the event that the fire burns through the rubber hose.

Abstract: In a method of computing and controlling the fuel injection quantity of a fuel injection system and the ignition timing of an ignition system of an international combustion engine by a microcomputer in accordance with operating conditions of the engine, a discrimination signal indicative of the presence or absence of misfiring is generated in accordance with an electric signal from the ignition system so that when misfiring occurs, even if fuel injection quantity data has already been computed, data for reducing the fuel injection quantity to zero is generated in response to the discrimination signal to stop fuel injection.

Abstract: An inhibit lock arrangement for a marine engine controller including a valve-operating shaft axially movable by an operator's handle, when set in a "start" position, for opening a valve whereby a fluid pressure signal is transmitted to the engine to start the engine. Axial movement of the shaft may be blocked by a piston rod actuated by a cylinder when the cylinder is pressurized by a pressure signal indicating an undesirable engine operating or malfunctioning condition. A pair of pivotable latches disposed on each side of the operator's handle for retaining the handle in a neutral position until a release piston is actuated by the operator for releasing the latches and permitting the handle to be moved through a slot but not into the "start" positions until the undesirable condition has been eliminated.

Abstract: A control device for Diesel engines is proposed in which a rapid shutoff of the engine can be effected by evacuating the suction chamber of the injection pump. The control device includes a supply pump and a reversal valve, which in a stop position connects the suction chamber with the intake side of the supply pump and connects the compression side of the supply pump with the fuel tank. A check valve is provided in the supply line between the supply pump and the fuel filter which, when closed, is vacuum-tight; this check valve is disposed to open toward the filter, counter to the force of a valve closing spring. Another check valve, comprising an overflow valve determining the suction chamber pressure, is provided in an overflow line leading from the suction chamber to the fuel tank; this overflow valve is also vacuum-tight when closed. When the reversal valve is actuated by an electromagnet, a similar key-actuated shutoff to that known in gasoline engines can also be effected in Diesel engines.

Abstract: For use on an automotive vehicle equipped with an internal combustion engine and an automatic speed control system, a device for detecting accidental engine load removal and for providing disengagement of the speed control system to prevent an engine runaway condition. The device comprises a circuit that compares present engine speed with a previous engine speed furnished after a time delay to produce an output signal when a preselected engine speed differential occurs during the delay period. The output signal is utilized to disengage the speed control system directly or alternatively, to turn off the engine ignition system.

Abstract: There is disclosed a speed control system for a diesel-powered vehicle in which a sensing element responsive to the speed of the vehicle or engine, preferably responsive to the vehicle speed, is connected through control means to close the fuel supply to the diesel engine, thereby permitting a preset limitation on vehicle and/or engine speed. The control system is designed as a retrofit to existing diesel engines and utilizes conventional elements such as the shut down lever of these engines, thereby avoiding any significant engine alterations or modifications.

Abstract: A movable member, including a first piston in a hydraulic cylinder, is biased toward a first position by a reset spring and toward a second position by a trip spring which is compressed between the first piston and a second piston in the same cylinder. The second piston is disposed for limited floating movement relative to said movable member. Hydraulic fluid under pressure is admitted into a first chamber between the first piston and the adjacent end of the cylinder, and a constricted fluid passage in the movable member enables the hydraulic fluid to flow between the first chamber and a second chamber defined by the second, floating piston and the other end of the cylinder. With equal, relatively high fluid pressure in both chambers, the trip spring is charged and the movable member is held by the reset spring in its first position.

Abstract: An overflow device for a vehicular carburetor. The carburetor includes a float chamber in which a maximum level is to be maintained. A drainage tube drains fuel at higher levels to a reservoir at an elevation lower than the carburetor. A vent tube vents the reservoir at an elevation higher than the carburetor. The reservoir can be heated by engine heat to evaporate excess fuel.

Abstract: A water protecting cap used for a distributor, which is to distribute ignition voltage in an internal combustion engine, with the object of preventing water from coming into the interior of a casing of the distributor through a ventilation opening formed in the casing. The cap is composed of a body portion to be crowned on a tower portion embracing the ventilation opening therein and a tongue portion integrally formed with the former. Between the body portion and the tongue portion a sheltered space is confined, which is protected from water spray which might come to the inside of the engine room of a vehicle. A ventilation passage formed through the cap body portion for being communicated to the ventilation opening is opened at the other end thereof at a position innermostly located in the sheltered space.

Abstract: An improved fuel injection system includes the use of an additive supply which may be selectively injected into the combustion chamber of a vehicle's internal combustion engine through the use of a manually controlled, electrically operated pump. The pump is electrically operated by a switch positioned on the dashboard of the vehicle and serves to transfer the fuel additive from an additive tank to a carburetor or fuel injector system. Further, a bypass line is provided around the conventionally employed fuel filters positioned within the regular fuel line so that fuel may be selectively delivered to the combustion chamber in the event that a fuel filter becomes clogged.

Abstract: A fire suppression system (10) for a vehicle having an engine (11) and a fire extinguisher (36) located proximate thereto. Previous systems of this type have not given any positive indication to the vehicle operator of the presence of an engine fire and have allowed the operator to remain in the cab (23) of the vehicle. In the present invention, operation of the fire extinguisher (36) automatically causes actuating means (25 or 32) and flow-interrupting means (14 or 19) to cut off fuel flow to the engine (11) and automatically causes the vehicle horn (34) to sound a warning of variable intensity. The horn warning can only be terminated by opening a disconnect switch (22) located outside of the vehicle cab (23), so that the vehicle operator is required to leave the cab (23) to restore the horn (34) to normal operation.

Abstract: A safety system for limiting the speed of a fuel powered engine, particularly an internal combustion engine of a vehicle or machine, preferably by controlling the engine ignition. The system is especially useful for vehicles such as snowmobiles, motorcycles, power boats, and the like. An alternating or pulsed electrical output directly proportional to engine rpm is detected and the rpm is limited to one of two or more different levels, depending upon the condition of a programming switch or switches, in this embodiment a throttle switch. An upper level limits engine speed to a safe rpm in the event of load removal, such as when a drive belt breaks or a gear change is missed. Engine speed is limited to a lower level if the throttle switch indicates idle rpm is desired and if the engine does not begin to decelerate from a higher rpm within a predetermined time, regardless of the actual throttle condition.

Abstract: A fuel vaporizer carburetor provides a continuous mixture of vaporized fuel and combustion air for operation of an internal combustion engine to meet the requirements of a wide range of engine operating conditions. Fuel vapor and combustion air undergo turbulent intermixing in an elongated mixing chamber. The mixing chamber is enclosed by a tubular wick of fiber mesh material which is saturated with fuel vapors and fuel condensate. The fuel vapors are generated by heating fuel in a float bowl which underlies the wick. Combustion air is admitted through a plurality of angularly spaced openings and is conducted through the porous flow passage provided by the tubular wick prior to entry into the mixing chamber. This arrangement produces a cyclonic, whirling movement which promotes intermixing of the combustion air and fuel vapors. Turbulence is induced at an intermediate point in the mixing chamber by a tapered sidewall housing section.

Abstract: A liquid fuel supply system for an engine having a power demand adjuster, e.g. a manually operable control acting in conjunction with operational factors associated with the engine to determine fuel flow to the engine, in which apparatus is provided responsive to failure of part of the fuel system to cause an auxiliary to become effective to control fuel flow to the engine in accordance with the setting of the power demand adjuster, the arrangement being that for any setting of the power demand adjuster the fuel flow to the engine will not alter instantaneously when the auxiliary becomes effective to control fuel flow. It may be arranged that the relationship between fuel flow to the engine and the setting of the power demand adjuster may alter within a short period after the auxiliary has become effective.

Abstract: The invention disclosed embraces a charge forming method of and apparatus embodying an instrumentality responsive to engine vibrations or disturbances brought into operation when the engine reaches a predetermined speed to automatically deliver excess fuel to the engine thereby momentarily providing a nonignitible mixture preventing overspeeding of the engine.