Abstract: A control system for a two cycle internal combustion engine comprising signal generator means to generate a low speed ignition position detection signal at a position suitable for igniting the engine at a low speed of the engine so that an ignition system of the internal combustion engine is operated during a transient period after the engine is ignited at an overadvanced position until the rotational direction of the engine is confirmed whereby the engine is prevented from being stalled during the transient period.

Abstract: An intake negative pressure detection apparatus for detecting an intake negative pressure of all cylinders of a multi-cylinder internal combustion engine by using negative pressure sensors, the number of which is fewer than the number of cylinders and each of the negative pressure sensors provided commonly for two cylinders of the internal combustion engine and connected to intake passages of the two cylinders, respectively through a change-over valve, which is so constructed as to introduce a pressure within the intake passage having a higher absolute value of the inner negative pressure among the intake passages into the negative pressure sensor.

Abstract: A starter generator for an internal combustion engine serving as a starter motor when the internal combustion engine should start and as a generator after the internal combustion engine starts and comprising a magnet rotor and a stator having a plural of coils, a plural of switch circuits to switch a current flowing through the coils and a switch controller to control switch elements of the switch circuits whereby the current flows through all the coils by controlling the switch circuits in accordance with a position of the rotor when the engine should start to thereby produce a large torque and the current flows through one or some of the coils via a rectifying circuit of rectifying diodes provided in some switch circuits after the engine starts to thereby charge the battery.

Abstract: A method of controlling an electric power source apparatus including an electric power converter circuit which converts an output of an electric power source into DC or AC output and load connector terminals across which is applied an output of said converter circuit, which includes the steps of detecting a waveform of the load voltage across the load connection terminals after the output of the electric power converter circuit is stopped when an overcurrent flows through the load connection terminals, of judging a cause due to which the overcurrent flows, and of controlling said converter circuit according to the result of the judgement, wherein the electric power converter circuit is kept stopped when it is judged that the overcurrent is caused by an increase in the load and the electric power converter is so controlled that the waveform of the voltage applied across the load connection terminals from the electric power converter circuit is consistent with the waveform of the voltage detected by the voltage

Abstract: A batteryless fuel injection apparatus for a multi-cylinder internal combustion engine adapted to generate a start injection command signal for each of cylinders in predetermined order whenever a reference pulse signal is generated by a signal generation device in case that which cylinder the reference pulse signal corresponds to cannot be judged to inject a fuel from the injector for each of the cylinders and to generate the injection command signal for each of the cylinders at a regular injection start position after which cylinder the reference pulse signal corresponds to is judged.

Abstract: A battery charging apparatus comprising a controller to control on-off controllable switch elements of an AC power source output short circuit and including a first control section to control the on-off controllable switch elements so that they are at an on-state when an instantaneous terminal voltage of a battery exceeds a first set value and a second control section to control the on-off switch elements so that they are at an on-state when an average voltage of the battery exceeds a second set value and serving to control them when a power source switch is closed.

Abstract: An internal combustion engine control system comprising the steps of supplying a reference position detection pulse and a low revolution ignition position detection pulse generated by a single pulser coil of a crank shaft sensor at a reference position of each of cylinders and a low revolution ignition position thereof through respective waveform shaping circuits to a CPU of an electronic control unit and controlling the internal combustion engine so that all the cylinders are simultaneously ignited at an extreme low revolution area where it cannot be judged which of the cylinders each of the pulses generated by the crank shaft sensor corresponds to when the crank shaft sensor generates every reference position detection pulse near a top dead center in a compression stroke of each of the cylinders.

Abstract: A control system for an internal combustion engine is provided for a running equipment, which prevents from running in the direction opposed to the driver's intention when reversing the engine is failed although a driver executes a reverse process of reversing the rotative direction of the engine. The rotative direction of the internal combustion engine is detected so as to generate a rotative direction detection signal, and a reverse failure signal is generated when the rotative direction of the engine detected by these detection signals does not correspond to the rotative direction of the engine commanded by a reverse command. When the reverse failure signal is generated, fuel supply to the engine is stopped, and the engine is extinguished so as to stop the rotation.

Abstract: A method of controlling an electric power supply apparatus with an electric converter circuit adapted to detect a phase difference between a waveform of a voltage across load connection terminals and a waveform of a reference voltage from time difference between zero cross points thereof and shift the phase of the reference voltage so that the phase difference is within a set range when it is decided that the phase difference is out of the set range whereby the phase of the output voltage across the load connection terminals is so controlled that it is coincident with that of an external voltage applied across the load connection terminals.

Abstract: A method of controlling an electric power source apparatus including an electric power converter circuit which converts an output of an electric power source into DC or AC output and load connector terminals across which is applied an output of said converter circuit, which includes the steps of detecting a waveform of the load voltage across the load connection terminals after the output of the electric power converter circuit is stopped when an overcurrent flows through the load connection terminals, of judging a cause due to which the overcurrent flows, and of controlling said converter circuit according to the result of the judgement, wherein the electric power converter circuit is kept stopped when it is judged that the overcurrent is caused by an increase in the load and the electric power converter is so controlled that the waveform of the voltage applied across the load connection terminals from the electric power converter circuit is consistent with the waveform of the voltage detected by the voltage

Abstract: A stator generator for an internal combustion engine comprising a magnet rotor provided on an output shaft of the engine and having main poles of permanent magnet and interpoles of material of high permeability alternately provided thereon whereby it is operated as an electric motor when the engine starts so that a drive current flows through armature coils with each of the main poles and one of the interpoles on the advanced side of the corresponding main pole serving as one rotor pole and it is operated as a magneto generator after the engine starts so that a control current flows through the armature coils so as to generate an output for charging a battery with each of the main poles and one of the interpoles on the delayed side of the corresponding main pole serving as one rotor pole.

Abstract: A discharge lamp lighting device driven by an internal combustion engine is disclosed which is capable of lighting a discharge lamp without using a ballast constituted by a leakage transformer. The device includes a generator which is driven by the internal combustion engine and of which output characteristics exhibit drooping characteristics, so that an output voltage of the generator may be applied to a discharge lamp without using any ballast. Output characteristics of the generator are so set that an output voltage of the generator at a non-load state thereof may be higher than a break-down voltage of the discharge lamp, a shortcircuit current of the generator may have a level sufficient to restrict a discharge current of the discharge lamp just after starting of discharge thereof to an allowable level or below, and a voltage across the discharge lamp and a discharge current thereof at a steady state thereof each are kept within a rated range.

Abstract: A process for controlling a change-over of a rotative direction of a two cycle internal combustion engine used for driving a travelling machine such as a scooter, a snowmobile, a buggy car or the like wherein the rotative direction of the engine is reversed by advancing an ignition position to an over spark advance position just when it is confirmed that reversion allowance conditions are satisfied which are required for reversing the rotative direction of the engine while the travelling machine is driven with safety maintained.

Abstract: A control system for an internal combustion engine adapted to precisely control an ignition position of the internal combustion engine in accordance with a revolution of the engine detected from an output of a pick up coil generating a signal in synchronism with a rotation of a crank shaft and an opening degree of a throttle valve by use of a microcomputer. Whenever an output of a throttle sensor is sampled, a three-dimensional map providing a relation among the revolution of the engine, the opening degree of the throttle valve and the ignition position is transferred into a two-dimensional map providing a relation between the revolution of the engine and the ignition position whereby the ignition position is determined by the two-dimensional map as soon as the revolution of the engine is detected so that the ignition is operated when the determined ignition position is detected.

Abstract: A fuel direct injection type two cycle internal combustion engine including a high output pressure fuel pump having a pump drive shaft connected thereto and disposed in a vacant space in an engine body.

Abstract: A power device including a magneto and a rectification circuit for rectifying an output of the magneto is provided which is capable of adjusting an output of the magneto without any specific control circuit. A field adjusting excitation coil is arranged on a side of a stator of the magneto so as to generate a field adjusting magnetic flux when it is excited, resulting in a magnet field of the magneto being varied by means of the magnetic flux. The field adjusting excitation coil is connected to an intermediate portion of a current flow circuit for a load current, to thereby be excited by the load current, so that a magnet field of a rotor of the magneto is varied depending on the load current, leading to adjustment of an output of the magneto.

Abstract: A stator for a magneto generator comprises a stator core having an annular yoke and a plurality of radial salient poles, a generator coil having coil portions wound on the salient poles of the stator core and connected to each other and output cords having core conductors connected to lead wires led out of the generator coil. A holder formed of an insulating resin on the yoke of the stator core is provided with recesses which have bare connections of the lead wires and the output cords placed therein and are filled with adhesives so as to cover the connections in an electrically insulated manner and fix them to the holder.

Abstract: An injector drive circuit capable of driving an injector of an internal combustion engine without using a DC-DC converter expensive. The injector drive circuit includes a power circuit for converting a voltage outputted from a magneto mounted on the engine into a DC voltage, a capacitor charged with a voltage accumulated in a voltage accumulator, a drive current feed circuit for applying a voltage across the capacitor to a solenoid coil to feed a drive current to the solenoid coil when it is fed with an injection command signal, and a holding current feed power supply section for feeding the solenoid coil with a holding current required for keeping a valve open after the drive current fed from the capacitor to the solenoid coil passes a peak value.

Abstract: A rotational direction change-over control method capable of reversing a rotational direction of an internal combustion engine without discharging unburnt gas. When a reverse command is generated, feed of fuel to the engine is interrupted to reduce a rotational speed of the engine to a set level. An ignition position of the engine is advanced to an excessively advanced position during a reduction in rotational speed to the set level. When the rotational speed is reduced to the set level, feed of fuel is restarted to reverse a rotational speed of the engine. When judgment that the rotational speed is successfully reversed is made, the ignition position is transferred to a position near a top dead center, to thereby maintain rotation of the engine in a direction reversed.

Abstract: A discharge lamp lighting device driven by an internal combustion engine is disclosed which is capable of lighting a discharge lamp without using a ballast constituted by a leakage transformer. The device includes a generator which is driven by the internal combustion engine and of which output characteristics exhibit drooping characteristics, so that an output voltage of the generator may be applied to a discharge lamp without using any ballast. Output characteristics of the generator are so set that an output voltage of the generator at a non-load state thereof may be higher than a break-down voltage of the discharge lamp, a short-circuit current of the generator may have a level sufficient to restrict a discharge current of the discharge lamp just after starting of discharge thereof to an allowable level or below, and a voltage across the discharge lamp and a discharge current thereof at a steady state thereof each are kept within a rated range.