Abstract: An ignition system comprises first and second series supply circuits including an ignition coil having a primary winding and a set of breaker contacts serially connected to said primary winding of said ignition coil, said first and second sets of breaker contacts having different opening times. A thyristor is connected in at least one of the two circuits. A firing signal is applied to the thyristor in accordance with the mode of operation of an associated engine, to enable the conduction of said thyristor in a first ignition mode being effected by said first and second sets of breaker contacts and in a second ignition mode being effected by either one of said first and second sets of breaker contacts.

Abstract: A high efficiency capacitive discharge ignition system utilizing the principle of simultaneous energy storage on both a capacitor and an inductor during the time that energy is drawn from the vehicle battery. The system is adapted for use with a breakerless type distributor by providing transistor switching circuitry which opens and closes a circuit on the primary side of a transformer in accordance with the output pulse of the distributor.

Abstract: The operation of an internal combustion engine is regulated by an electronic regulation circuit which utilizes suction pipe pressure to modulate the width of a pulsed signal and to vary the amplitude of a sawtooth wave signal in accordance with the duration of said pulsed signal so that the fuel injection to the engine may be controlled as desired under all operating conditions. The regulation circuitry includes apparatus for modifying the slope of the time versus pressure characteristic of the suction pipe transducer to account for the differences between full load and no load torque of the engine. This is accomplished byvarying the amplitude of the sawtooth waveforms by shunting a portion of the charging current to the sawtooth generator in accordance with the load conditions on the engine.

Abstract: There is disclosed an ignition system for a multicylinder internal combustion engine which employs a conventional Kettering ignition coil and a pulse generator such as an induced voltage coil operating in cooperation with a magnetic circuit driven in timed relationship to the engine for generating a train of voltage pulses in synchronism wih the engine. The circuit of the invention includes a circuit across a source of electrical energy and the primary windings of the ignition coil with an electronic switch therein and with a high frequency pass filter in circuit between the induction coil and the electronic switch of the primary windings circuit to pass only the high frequency voltage pulses that are responsive to the inflection point of the cyclic voltage induced in the induction coil. The high pass filter is preferably a tuned RC circuit operative to effect pulse shaping of the train of induced voltage pulses to a train of sharp peak voltage pulses of minimal time and duration.

Abstract: In order to reduce the CO-content in exhaust gases of combustion engines, the atomization is improved by coupling the displacer body of a fuel pump with the armature of an electro-magnet, which armature is arranged so as to be movable between two electro-magnets and is adapted to move each time to one of the two electro-magnets at the alternating energization of the latter.

Abstract: An ignition apparatus wherein an AC current signal is produced from the coil of a pick-up in accordance with the engine revolutions and the primary-side current of the ignition coils is regulated in accordance with the output signal from the pick-up coil thereby to generate a high voltage at the secondary side of the ignition coils. Further, a monostable multivibrator and means for generating a voltage corresponding to the output frequency of the pick-up coil are provided in order to maintain the duration of energization of the primary side of the ignition coils substantially constant over a wide range of variations of engine revolutions from low to high levels.

Abstract: An electronic, solid-state ignition system for an internal combustion engine is disclosed which is responsive to alternating timing signals produced in timed relationship with the engine. The electronic system comprises a plurality of integrator circuits, as transistorized output stage and a feedback loop for linearly regulating the current limit duty cycle to a fixed percentage of the firing cycle time period independent of current ramp time through the coil. A further circuit also responsive to the timing signals is included, which circuit overrides the aforementioned electronic system below a predetermined engine rpm. The overriding circuit effects a desired lead angle to the timing signals applied thereto to produce a minimum dwell angle for engine speeds below the predetermined engine rpm.

Abstract: A device for metering the flow of two fluids, such as the flow of liquid fluid and air to an internal combustion engine, includes a respective duct for each of the two fluids, an ionic flow meter in each of the two ducts, a valve controlling the flow of one of the fluids through its duct and circuitry comparing the flow rates measured by the ionic flow meters and controlling the valve accordingly so as to maintain a desired ratio between the two flow rates.

Abstract: An internal-combustion engine having a combustion chamber consisting of a main combustion chamber and a sub-combustion chamber, said main combustion chamber being defined by the inner surface of the cylinder head and the top surface of the piston in the cylinder, said sub-combustion chamber being formed in a sub-chamber element, said sub-chamber element being forcedly fitted into a recess arranged in said cylinder head, and the coefficient of thermal expansion of said cylinder head being 1.5 to 2.5 times that of said sub-chamber element.

Abstract: An electronic, solid-state ignition system for an internal combustion engine is disclosed which is responsive to alternating timing signals produced in timed relationship with the engine cycling. The electronic system comprises a plurality of integrator circuits, a transistorized output stage and a feedback loop for linearly regulating the current limit duty cycle to be a fixed percent of the firing cycle time period independent of current ramp time through the coil. As a result, sufficient spark potential is developed and predetermined spark timing is produced thereby preventing mis-spark even though the engine may be accelerating at a maximum specified rate or decelerating.

Abstract: Certain intervals are determined in which output signals from an exhaust gas sensing device are sensed, and then applied to a control circuit, to control the fuel supply system (carburetor, or fuel injection system) in such a direction that a predetermined ratio of fuel and air is being supplied to the engine to provide exhaust gases of predetermined composition. The intervals are determined by a logic circuit which has applied thereto engine operating parameters such as operating time of the engine after having been started, engine speed, engine power condition (idling, or supplying power), engine temperature, or the like.

Abstract: The operation of each electromagnetic fuel injector of an internal combustion engine is controlled so that when an energizing current is caused to flow from the battery of the engine through the coil of the fuel injector, the time taken for the current to reach its full value is controlled electronically so that it is a constant irrespective of the battery voltage but no shorter than would naturally result if the battery were to deliver its predicted lowest voltage directly to the coil, the necessary control being obtained by generating a constant electric current and using it to charge a capacitor to a predetermined voltage, comparing the voltage of the capacitor with a voltage which is proportional to the energizing current flowing through the coil, and controlling the build up time of the energizing current so that it is equal to the time taken to charge the capacitor, this being constant.

Abstract: Two check valves are connected between a fuel tank and a carbon canister to relieve excessive pressure or vacuum in the fuel tank.

Abstract: Device for limiting the speed of internal-combustion engines, particularly uitable for small and medium-size, two-stroke engines which operate at rather high revolutions, such as between 2000 and 10000 rpm. Two exemplary embodiments are disclosed. In both, an ignition coil receives a discharge voltage from a capacitor energized by a charging coil, a rectifier being coupled to the output of the charging coil, and a separate tripping coil used in the circuit arrangement, which latter is displaced in phase with respect to the charging coil. A semiconductor switch, preferably a thyristor with steep electrical characteristics, is connected to the capacitor and has its switching gate connected to the tripping coil, the conductive phase of the switch being so controlled by the tripping coil that the charging process of the capacitor is at least partly inhibited when a predetermined maximum engine speed is attained or exceeded.

Abstract: This disclosure deals with a variable fluid pressure regulator wherein the level at which the fluid pressure is regulated is adjustable. A member has a flow passage formed therein, and the fluid flows through the passage and out of the member, and a closure is positioned over the opening. The closure is yieldably mounted relative to the member and a spring urges the closure toward the opening. A recess or cavity is formed in the closure, and the fluid flows from the opening, into the recess, and then through a space between the closure and the member. The fluid pressure in the passage is a function of the spring force and the effective area of fluid pressure on the closure, and the effective area comprises the area of the opening plus any area of the recess which lies outside the margin of the opening. The regulated fluid pressure level may be varied by laterally shifting the closure relative to the opening in order to change the effective area.

Abstract: An internal-combustion engine ignition system comprises a power source with a voltage stabilizer; a compacitor connected to the power source through a rectifier; several circuits connected in parallel with the capacitor and ignition coil primary windings and thyristors. To the control gate of each of the thyristors is connected a control circuit with a control pulse generator. Also connected to the thyristor control gates is an arrangement for applying a negative bias to the control gates. This arrangement is in the form of a diode whose anode is connected to the cathode of each of the thyristors, whereas the cathode of said diode is connected to the capacitor and is also connected through isolation diodes to the control gate of each of the thyristors.

Abstract: An engine ignition system connectible to a source of electrical energy and including an ignition coil and a timing device for repetitively and alternately providing first and second timing signals with the interval between adjacent timing signals being related to engine speed. The ignition system is responsive to the first timing signal for providing a triggering signal a variable interval after the first timing signal with the variable interval reducing with increases in engine speed. The ignition system includes a switching device which is responsive to the triggering signal and the second timing signal for completing a circuit from the source of electrical energy through the coil to charge the coil. The switching device is responsive to the second of the first timing signals to open the circuit to discontinue the charging of the coil.

Abstract: An emission control circuit for an internal combustion engine having a voltage generating circuit connected to a source of direct current energy at a first potential for generating an output voltage of a substantially higher potential, the voltage generating circuit including energy storage means coupled to the output of the voltage generating means for storing an electrical charge. A triggerable switching means is provided for coupling the energy storage means in series with the primary winding of an induction coil, and triggering means responsive to the opening and closing of ignition breaker points is provided for applying triggering signals to the triggerable switching means. The triggering signals accommodate discharging of the energy storage means through the primary winding for a certain predetermined time period. A comparator circuit is provided which includes two semiconductor amplifier circuits, each having a pair of output electrodes and a control electrode.

Abstract: A device for protecting an ignition device, particularly for motor vehicles, equipped with an internal combustion engine, in which a zener diode controls, by means of at least two transistors the placing in short-circuit of a resistor connected in series with the primary winding of an ignition coil and a control device in such a manner that when the supply voltage of the device exceeds a determined value, the resistor acts in series with the coil, which avoids damage to the ignition device.

Abstract: A plunger is reciprocable in a barrel to force fuel to the injection nozzles. The portion of the barrel defining with the plunger the compression chamber is movable and is formed with a port leading to the unpressurized fuel reservoir in such a manner that the plunger uncovers the port at the end of its fuel injection stroke to overflow fuel from the compression chamber to the reservoir and terminate fuel injection. The position of the movable portion of the barrel and thereby the port relative to the plunger determines the fuel injection volume. A closed loop electronic servo system is provided to position the movable part of the barrel in accordance with the required fuel injection volume.