Abstract: Electric current supply to an actuator is ON-OFF controlled in such a manner that fuel supply quantity is made to be zero on condition that an engine rotation speed reaches a rotation speed less than a predetermined one in a low rotation region and a starter switch is turned OFF, whereby overrun of an engine and reckless run of a vehicle are prevented when a rotation sensor is in an abnormal condition.

Abstract: An automatic shut off device for preventing air from entering the fuel system of an internal combustion engine when the fuel supply becomes low. The device provides a fuel chamber having an inlet connected to a fuel supply line, a float switch and an outlet connected to the engine fuel pump or fuel system. When the fuel supply falls below a preselected low level, but before the level reaches a lower inlet to a standpipe, the float switch is actuated to shut down the engine before air can enter the engine fuel system, thereby eliminating the necessity of bleeding the fuel system when the fuel supply is restored. A bleed orifice at the top of the fuel chamber allows trapped air to escape and return to the fuel tank when fuel is restored to the device.

Abstract: In an apparatus for controlling the fuel injection advance angle of a fuel injection pump having a hydraulic type timer with a solenoid valve, the apparatus has a closed-loop control system in which the solenoid valve is controlled so as to be closed or opened in accordance with a first control signal produced in response to a feedback signal showing the actual injection advance angle so that the actual injection advance angle is made to coincide with a desired target injection advance angle when the feedback signal is in a predetermined condition, and the solenoid valve is controlled by a second control signal in the open-loop control mode so as to be continuously closed/opened whereby to regulate the average opening degree of the solenoid valve in order to obtain the optimum injection advance angle when the feedback signal is not in the predetermined normal condition.

Abstract: A device is proposed for controlling the injection start to a set-point value dependent on operating parameters, in which the period of time between the appearance of an injection start signal and a reference marking (for instance, a top-dead-center signal) is counted out and the result of counting is compared with the set-point value. To avoid malfunctioning, the triggering of the counting process is possible in only one, predetermined crankshaft angle range. Various values are provided for the counting-out frequency. In the exemplary embodiment they are within the range between 50 and 200 kHz. In case of failure, a control of injection onset is effected, and as needed, a limitation of the fuel quantity as well--for instance to 70% of the respectively determined quantity.

Abstract: A double coil spring assembly to serve as a closing force for throttle valves of carburetors or throttle bodies, the spring assembly including an integral spool with inner and outer arbors supported on a closed end to separately support inner and outer coil springs, there being lands on the outer arbor to position axially the outer spring, and the inner spring as an installable component in the assembly of the carburetor or throttle body.

Abstract: A restoring device for an adjusting element, which serves in particular for restoring a throttle device of an internal combustion engine. The restoring device has a first spring subject to bending, which is disposed on a bushing that is rotatably supported about a throttle valve shaft and with one end engages a step of the bushing, while the other end of the spring is hooked onto the housing on the throttle valve fitting. A lever is connected with the shaft. The first spring subject to bending acts in the restoring direction of the throttle valve. A second spring subject to bending is disposed in the bushing, one end of this spring engaging the bushing and the other end being supported on the lever. The spring force of the second spring subject to bending is less than that of the first such spring, so that the bushing, with a stop step, is rotated so far that the second spring has not influence in the restoring direction upon the throttle valve.

Abstract: A throttle return spring assembly having inner and outer torsion springs contained between end housings is preassembled and then mounted as a unit about a throttle body shaft.

Abstract: A throttle safety device including a coil spring mounted on the outer periphery of an operating rod and having one end secured to a fixed part of the device and an opposite end connected to a locking member to resiliently force the latter to move to an operative position. The coil spring is turned into wrapping and pressing engagement with the outer periphery of the operating rod when the locking member is in an inoperative position, so as to hold the latter in the inoperative position.

Abstract: In a diagnosis apparatus for an electronic control system adapted to vehicles and including a speed sensor for producing speed pulses responsive to the actual vehicle speed, a switch produces a diagnosis signal when actuated upon request for self-diagnosis in operation of the control system. A computer is responsive to the diagnosis signal to discriminate change of the level of each speed pulse during movement of the vehicle and to produce a first signal in dependence upon discrimination of change of the level of each speed pulse and a second signal in dependence upon discrimination of unchangeable state of the level of each speed pulse, and an indicator indicates an error in operation of the speed sensor in response to the second signal and normal operation of the speed sensor in response to the first signal.

Abstract: A protection system for a two-cycle outboard motor engine having a separate lubricant storage tank. The protection system generally includes a sensing device associated with the lubricant storage tank for detecting a low lubricant level condition, a first circuit for producing a speed reduction signal in response to the detection of this condition, a second circuit for gradually reducing the speed of the engine in response to the speed reduction signal even though the engine throttle control may be set for a higher speed, and a switch for manually terminating this speed control. The first circuit includes a controlled conduction device for maintaining the presence of the speed reduction signal after the low lubricant level condition is no longer present until the switch is actuated.

Abstract: Disclosed herein is an engine including a flywheel starting gear and a cooling system, a member mounted on the engine for displacement between a first position engaged with the flywheel gear so as to produce an audible noise in response to engine rotation and a second position clear of the flywheel gear, a spring biasing the member toward one of the first and second positions, and a temperature or pressure responsive plunger for displacing the member to the other of the first and second positions against the action of the spring in response to malfunctioning of the cooling system.

Abstract: The level of coolant in the coolant jacket of an "evaporation cooled" engine (wherein the coolant is boiled off in place of being forcefully circulated) is detected by a plurality of level sensors so that even though the attitude of the coolant level changes due to a change in orientation of the engine or the like, as long as one of the sensors is immersed in the coolant, the pump which recirculates condensed coolant from a radiator is not energized. An additional low level sensor is used to lower the level of the coolant to an predetermined low level to promote rapid engine warm-up during cold engine starts.

Abstract: The invention relates to a rotating mechanism of a throttle valve for a fuel supply device of an internal combustion engine. The mechanism has an actuator for opening the throttle valve upon depressing of an accelerator, a cam lever pivotally secured to a throttle shaft and having a cam set to open the throttle valve more than the movement of said actuator upon depressing of the accelerator, a throttle lever for coupling the cam lever to the throttle shaft, and an engaging member mounted at the cam lever side to take an engaging position or a nonengaging position of the throttle lever. In this rotating mechanism of the throttle valve, the engaging member can operate to take the engaging position with respect to the throttle shaft when the actuator becomes impossible to operate.

Abstract: A fuel pumping apparatus includes a high pressure pump and a low pressure pump which supplies fuel thereto. A further low pressure pump supplies fuel at a pressure which is modified to provide a control pressure which is used to control the delivery quantity of the pump. The pump draws fuel from the lower portion of a reservoir and the pump from the upper portion whereby in the event of fuel starvation the high pressure pump will be starved of fuel before the control pressure is lost.

Abstract: An anti-slip apparatus is provided for controlling a slip rate of a drive wheel of a wheeled vehicle to the optimum level. The vehicle has an engine, a fuel control device for controlling a supply of fuel-air mixture to the engine, and an accelerator member operatively connected to the fuel control device by an operating wire. Drive and driven wheel speed sensors sense the rotational speeds of the drive and driven wheels of the vehicle, respectively. A wire control device is operatively connected to the drive and driven wheel speed sensors and is operable to activate the operating wire to reduce the supply of fuel-air mixture from the fuel control device to the engine when the ratio of the rotational speed of the drive wheel to the rotational speed of the driven wheel exceeds a predetermined level.

Abstract: A detection device having pushbutton operation which after a short predetermined period of time indicates by means of lights whether both oil and lubricant levels are adequate or if not which is not satisfactory. If lubricant is indicated as being low, then means are provided to indicate the required amount of lubricant. The device is coupled with circuitry so as to quickly activate a thermistor within the lubricant reservoir for accurate detection at that point and may be coupled with engine deactivation means to preclude engine operation in the event that the device is not activated or in the event that either of the coolant or lubricant levels are inadequate.

Abstract: A fuel injection control device suited to use in automotive diesel engines. The device comprises sensors for producing signals upon sensing various states of operation of the engine, including a temperature sensor adapted to produce a temperature signal upon sensing the temperature of a coolant for cooling the engine, a first arithmetic operation means for determining the rate of fuel injection in accordance with the signals delivered by the sensors, and a second arithmetic operation means for determining the timing of fuel injection in accordance with the signals delivered by the sensors.

Abstract: In an electronically controlled fuel injection apparatus which is controlled in accordance with the signal from a sensor for providing a signal concerning the operational condition of the associated engine, there are provided a generator for generating a stand-by signal by which the apparatus is able to continue the control operation thereof without the normal output signal from the sensor and a switching circuit for applying the stand-by signal instead of the signal from the sensor to a control section for electronically controlling the apparatus in response to detecting the occurrence of trouble in the sensor.

Abstract: The invention relates to a fluid valve, in particular for use as a throttle valve in an internal combustion engine. The valve has a flow path (25) for the air (26) defined by a tube having a flexible wall (14) which separates the tube from an adjacent chamber (36), so that a change in the pressure within the chamber (36) deforms the flexible wall (14) and thus causes a change in the internal cross-section of the passage (25). When the valve is in its closed position, air can still flow through an air bypass passage (46).

Abstract: An emergency control apparatus is proposed for a fuel metering system in a Diesel engine, where the signal processing unit (microcomputer) and/or a regulator can be bypassed. In the case of the failure of the signal processing unit, the position signal of the driving pedal is switched more or less directly to the regulator for triggering the control unit for the quantity-determining member, and if there is a failure of the regulator, a purely proportional regulator comes into action. It is thus assured that even in the case of failure emergency operation is guaranteed, the course of which emergency operation can essentially be influenced only by the driver of the vehicle.

Abstract: An engine stopping device for rendering an internal combustion engine of a spark ignition type by grounding an ignition circuit includes a contact section for achieving grounding which is exposed to air flow passing through an engine cooling air passage, to clean off dry grass or other foreign materials from the contact section.

Abstract: An electronic, breakerless ignition system with a grounded cut-off switch has a transformer coil and an electronic ignition circuit in a unitary housing fitted on the core. In an inductive embodiment of the system, a trigger coil is in circuit with the base of a Darlington transistor to control the operation of the transistor in response to flux generated voltage in the trigger coil. The primary winding of the transformer coil has one ground connection and the trigger coil is connected to an entirely separate ground terminal. Each of the terminals is fastened at one end to spaced points on the core. In a capacitor discharge ignition embodiment, one end of the primary winding is connected to a ground terminal and a coil for charging the capacitor is connected at one end to a separate ground terminal.

Abstract: An injection internal combustion engine with supercharging by an exhaust gas turbocharger, in which a by-pass control limits the maximum supercharging pressure and in which upon exceeding a predetermined critical maximum pressure a clearly noticeable indication thereof is given to the driver.

Abstract: The invention provides an apparatus and method for measuring the concentration of particles in a gas using an electrode disposed within but electrically insulated from an electrically-conductive conduit member, a current measuring device and means for maintaining the conduit member and the electrode at substantially the same potential. Flow of gas containing charged particles along the conduit induces a current passing from the electrode through the current measuring device. If the concentration of particles in the gas becomes excessive, the current measuring device activates a warning device or takes other action to prevent damage to any gas-consuming device attached to the apparatus. The apparatus might include an optional ionizer upstream of the electrode to charge the particles in the gas.

Abstract: Disclosed is an emergency control device for fuel dosing systems of IC engines, particularly for fuel injection devices of a diesel engine. A conventional regulating path for the fuel pump, includes a series connection of a set of data sensors, a signal processing circuit for computing a regular control signal, and a fuel regulating device connected to the fuel pump and provided with a manually or automatically controlled switching device. An emergency control branch is connected between the switching device and the sensor to function in parallel with the regular regulating device. The emergency control branch includes a nominal value generator of a signal corresponding to a maximum manifold pressure and a manifold pressure regulator controlled by output from the nominal value transmitter, to apply, via the switching device, to the fuel pump a dosing signal which causes the manifold pressure not to exceed the preset maximum value.

Abstract: A mechanical engine protection system includes a temperature responsive valve, a pressure sensing valve and a mechanical shutdown actuator. The valves and actuator are fluidly interconnected so that the actuator is shifted from a run position to a shutdown position upon the occurrence of a high engine operating temperature condition or a low oil pressure condition. The temperature responsive valve includes an inlet port, an outlet port and a drain port. A valve element is positioned by a thermally responsive unit or motor to selectively interconnect the outlet port with either the inlet port or the drain port. The pressure sensing valve includes an inlet port, an outlet port, a drain port and a pilot port. A diaphragm motor positions a valve element in response to the pressure signal applied to the control port to selectively interconnect the outlet port with the inlet port or the drain port. The shutdown actuator includes an inlet port, an actuator rod and a spring loaded diaphragm motor.

Abstract: A water flow failure detection device comprising a first water flow conduit; a second conduit with one end closed and the other end open communicating with the water flow conduit; positioned within the second conduit is a float which is free to translate therein. The float includes a permanent magnet positioned around its longitudinal mid-section; and a reed switch located on the external surface of the second conduit whereby the flow of water through the first conduit sufficiently raises or elevates the float away from the reed switch allowing the reed switch to return to its normal state and an absence of water flow causes the float to translate downward due to gravity to a location adjacent the reed switch thereby changing the state of the reed switch. The reed switch change of state can be used to terminate fuel or ignition to an engine or operates an alarm signal in the absence of cooling water flow through the engine.

Abstract: Apparatus and method for prelubricating newly built, overhauled or rebuilt, and repaired engines including a relatively compact and lightweight pressurized vessel containing a predetermined volume of a light grade prelubricant which may, preferably, be of a specialized or proprietary formulation. The vessel is pressurized with carbon dioxide which serves as the propellant to force the lubricant through an adjustable metering valve on the vessel, an interconnecting hose and, in turn, into an engine oil port wherein the pressurized prelubricant is distributed through existing engine oil passageways, channels, and galleys.

Abstract: In a rotational speed control apparatus for an internal combustion engine in which a signal-responsive diaphragm, whose controlling position is determined by a controlled negative pressure signal, is provided with a valve member controlling to negative pressure acting upon a driving diaphragm controlling the opening of a throttle valve, the negative pressure acting upon the driving diaphragm, when the controlled negative pressure signal is detected to be not normal, is controlled to be shifted to the level at which the driving diaphragm is rendered substantially non-operable.

Abstract: In a diesel engine having a rotational angle sensor for detecting the engine speed, when the rotational angle sensor is in an abnormal state, a fuel-cutting operation is performed. A first fuel-cutting operation is immediately performed so as to indicate to the driver that an abnormal state exists. However, subsequent fuel-cutting operations after restarting of the engine are delayed as compared with the first fuel-cutting operation.

Abstract: A method for sensing when the quantity of oil in the crankcase of a reciprocating piston engine is inadequate for proper lubrication while the engine is operating. During engine operation, the crankcase gas pressure cycles between positive and negative values as the piston reciprocates. Positive crankcase gas pressures are vented through a check valve. The resulting cyclic vacuum in the crankcase has a peak and average magnitude which is a function of the quantity of oil in the crankcase. For a constant speed and substantially constant load engine, the crankcase vacuum can be used to indicate the approximate quantity of oil in the crankcase. For constant or variable speed and load engines, a drop in the crankcase vacuum below a predetermined level can be used to automatically stop the engine prior to damage by inadequate lubrication.

Abstract: In a so-called stop-start device for a motor vehicle engine particular consuming devices in the motor vehicle are changed over to a mode of operation with a lower current consumption, when the engine is switched off, or a switching-off of the engine is prevented, when functionally important consuming devices are switched on. Thus one achieves an appropriate compromise between saving of fuel and a satisfactory charge condition of the battery.

Abstract: An anti-dieseling structure for demand carburetors wherein the air valve of a particular demand carburetor is provided with an exteriorly actuated lift lever, the same, when hand actuated, operates to lift the air valve. The tapered metering needle depending from the mechanically raised air valve is to make the fuel air mixture progressively more lean, with a carburetor operating at idle condition, to thereby starve the engine as to fuel intake and thus cause the engine to shut off in a positive manner and thus avoid dieseling. One or more carburetors may be accommodated by respective levers; where plural carburetors are employed, the levers are keyed to a common shaft that is rotated by control means leading to the dashboard at the driver's compartment. The engine, of course, will operate in the usual manner when the control cable coupled to the levers is not actuated, thereby leaving the air valves free to operate in the usual manner.

Abstract: A fuel quantity control apparatus of a supercharged diesel engine with safety measures comprises a fuel injection pump capable of increasing the fuel quantity according to the degree of supercharging, a detector for detecting the temperature in a combustion chamber or the temperature of the exhaust gas, a control circuit receiving an output of the detector, and a three-way valve driven by the control circuit to control the amount of the increase of the fuel quantity. Through the use of the apparatus when the detected temperature reaches a predetermined abnormal temperature, the amount of increase of the fuel quantity can be made zero or decreased and accidents such as melting or damage of the engine by abnormal rise of the temperature in the combustion chamber or of the temperature of the exhaust gas can be prevented.

Abstract: An electrical speed control system for selectively connecting an accessory to a vehicle engine having a conventional alternator driven thereby, utilizes the voltage output of the alternator stator to determine the rotational speed of the engine, and permits the accessory to be connected to the engine when the shaft speed is at or below a maximum safe engagement speed, and disconnects the accessory when the speed is above a maximum safe speed for the accessory. The speed control system further prevents reengagement of the accessory after reaching and falling below the high-speed disengage point until the rotational speed of the engine has fallen below the maximum safe engagement speed level.

Abstract: The invention is directed to a safety arrangement for an internal combustion engine with self-ignition such as a diesel engine or the like wherein the operational signals of throttle position, rack travel and rotational speed are continuously monitored and compared with upper and lower limit values for these signals. From this comparison, comparison signals are generated and are combined with each other to provide an overall monitoring of the operation of the diesel engine so that the latter can be shut off when impermissible ranges of operation are present or, if conditions permit, the engine can be switched to an emergency mode of operation so that the motor vehicle may be driven to the next service station for repair.

Abstract: An engine air intake shut-off valve utilizing a loose-fitting gate member is disclosed. The shut-off valve is of the sliding gate type in which a gate member is reciprocable between an open and a closed position. The gate member is dimensioned smaller than the interior of the valve housing to provide a clearance for smooth operation after dirt has accumulated in the housing. The gate member is loosely connected to a reciprocating cylinder which permits the gate member to move along the direction of air flow to seat against either of two opposed seating surfaces in the valve housing.

Abstract: Disclosed herein is an emergency shutdown mechanism for a turbocharged diesel locomotive to prevent overspeeding of the turbocharger under engine malfunction conditions. The shutdown mechanism includes an air flow shutoff plate slidably mounted for selective closing of the air intake end of the turbocharger, a plurality of sensors mounted in the air box about the pistons for detecting increases of temperature and/or pressure within the air box and means activated by the sensors in response to such increases of temperature and/or pressure for moving the shutoff plate across the air intake end of the turbocharger and preventing air flow therethrough. The cessation of air flow through the turbocharger causes the engine to immediately shutdown and prevents overspeeding of the turbocharger.

Abstract: An air filter in front of the intake opening of the carburetor has an elastic lower surface (20) with a bead (19) which is movable in the intake opening. The displacement is adjusted by means of a choke control (22) which at maximum deflection presses the whole bead into the intake opening.

Abstract: An electronic circuit for disengaging an electronic speed control system when the rate of change of the automobile engine speed exceeds a predetermined amount is disclosed. A ferrite or powdered iron ring current transformer generates an input signal to the electronic circuit from one of the spark plug wires in the engine. The pulses from the ring current transformer are passed through a monostable multivibrator circuit and a filter network to a differentiator. The output of the differentiator is connected to a high limit detector and a low limit detector. When the rate of change of engine speed exceeds a predetermined amount, a signal is generated to disengage the speed control circuit.

Abstract: In an electronically controlled fuel injection apparatus which has fuel injection amount control system wherein a position signal indicating an actual position of a fuel injection amount adjusting member is fed back thereto, the apparatus has a speed control data generator for controlling the apparatus without the position signal and the apparatus is adapted to be controlled in accordance with the speed control data when the position signal cannot be obtained.

Abstract: An engine has a load detector, or more specifically a threshold load comparator, and also detectors for sensing any abnormality of various factors influencing the normal engine operation. When no abnormality is sensed, the engine is made to operate automatically at a low speed level when the engine load is below the threshold value, and at a high speed level when the load is beyond such value. When any abnormality is sensed, then the engine is emergently halted in a fail-safe manner, thus any damaging disorder in controling circuitry for effecting such emergent halting leads in itself to emergent halting of the engine as well.

Abstract: An engine protection device to automatically reduce engine speed to low idle or complete stop. Engine speed reduction is accomplished through the instrumentalies associated with the engine throttle rod. The effective length of the engine rod varies in response to an increase in the coolant temperature or a decrease engine oil pressure.

Abstract: An engine is automatically stopped under predetermined conditions, thereafter, automatically restarted under other predetermined conditions, and a primary check indicating device for indicating abnormal conditions in various components of a vehicle is forcedly turned OFF at least when the engine is automatically stopped. The primary check indicating device includes, for example, a charge warning lamp for indicating abnormality in the generating condition, an oil pressure lamp for indicating abnormality in the pressure of lubricating oil and an exhaust gas temperature lamp for indicating abnormality in the temperature of exhaust gas.

Abstract: An engine overheat warning system for an internal combustion engine, which system includes a source of gas with a pressure different from atmospheric pressure and a pneumatic horn. The engine overheat warning system also includes a conduit communicating between the source of gas and the pneumatic horn and a temperature sensing valve located in the conduit and connected to the engine for causing communication between the source of gas and the pneumatic horn when the engine reaches an overheat condition. When the source of gas and pneumatic horn are thus in communication, the pneumatic horn produces an audible engine overheat warning.In one embodiment, the source of gas with a pressure different from atmospheric pressure is an intake manifold of an internal combustion engine.

Abstract: A fuel injection control method for injecting fuel into a plurality of cylinders of an internal combustion engine in predetermined sequence starting from a fuel injection into a particular one of the cylinders, in synchronism with generation of pulses from crank angle position-detecting means indicative of predetermined crank angle positions of the engine, wherein when one of the cylinders which corresponds to a first pulse from the crank angle position-detecting means generated immediately after generation of a pulse from cylinder-discriminating means indicative of the above particular cylinder is other from the particular cylinder, the sequence of fuel injections into the cylinders is changed so as to effect a first fuel injection into the above particular cylinder immediately after the generation of the above pulse from the cylinder-discriminating means and then effect fuel injections into the other cylinders in the above predetermined sequence.

Abstract: An engine 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. One embodiment of the remote override uses a pushbutton and a spring-biased hydraulic piston to actuate the bypass valve which allows fuel around the main fuel member. 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: An overheat preventing system for internal combustion engines, especially for outboard engines. The engine includes a choke valve, and electromagnetic means for closing the choke valve. A thermo-switch that is responsive to engine temperature is effective to cause the electromagnetic means to close the choke valve and reduce the engine speed when the engine temperature is too hot.

Abstract: A detection device having pushbutton operation which after a short predetermined period of time indicates by means of lights whether both oil and lubricant levels are adequate or if not which is not satisfactory. The device is coupled with circuitry so as to quickly activate a thermistor within the lubricant reservoir for accurate detection at that point and may be coupled with engine deactivation means to preclude engine operation in the event that the device is not activated or in the event that either of the coolant or lubricant levels are inadequate.

Abstract: A fuel control system for an internal combustion engine senses a failure in the coolant system and supplies fuel alternately to each of the two cylinder banks for predetermined periods of time so that one of the cylinder banks is supplied with an air and fuel mixture to power the engine and the other one of the cylinder banks is supplied with air only to be cooled thereby to extend the safe operating time of the engine. The air/fuel ratio of the mixture supplied to the bank provided with a combustible mixture is adjusted to limit the speed of the vehicle to further extend the safe operating time of the engine.