Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Mitsuyoshi Kanai

Makoto Yamamura

Kazutomo Nishida

Riyuuhei Tamamoto

Akihito Kasai

Akihisa Shinoda

Souhei Honda

Yasushi Fujita

Tadayuki Yoneyama

Kentaro Taniguchi

Hideyuki Sakamoto

A multipurpose engine has a wiring structure between the generator and electrical components. A connector box is provided in a gap defined directly between the generator and the fuel tank. A plurality of electrical wirings is interconnected inside the connector box.

Multipurpose engine having electrical wiring connected inside connector box

A rotary variable resistor includes a variable resistor body mounted to a console panel, a rotor shaft protruding outward from the variable resistor body, and a control knob coupled to an outer end of the rotor shaft. A single plate-shaped stopper is projectingly provided, along a rotational direction of the rotor shaft, on a front face of the variable resistor body from which the rotor shaft protrudes. First and second restricting portions are provided on the control knob side-by-side along the rotational direction of the rotor shaft to alternately abut against the stopper in defining an actual rotational angle of the rotor shaft.

Rotary variable resistor

In a capacitor-discharge ignition system for an internal combustion engine having a power generation coil, a capacitor connected to the power generation coil, an ignition coil having a primary winding connected to the capacitor through a thyristor and a secondary winding connected to a spark plug, and a microprocessor which turns on the thyristor at a predetermined crank angular position to produce ignition in the spark plug, an engine stop switch is installed to input an engine-stop command signal to the microprocessor when being turned off by the operator. With this, it becomes possible to surely stop the engine at any time if desired.

Capacitor-discharge ignition system for internal combustion engine

In an engine which starts using a recoil starter, ignition chance during inertia rotation is not missed. If the engineis rotated by the recoil starter, output of a power generator which is directly connected to the engineis increased, and a CPUis reset at timing t. At timing t, if pulse Pis input from a revolution number sensorto the CPU, the CPUoutputs first ignition instructions when predetermined time Tis elapsed (t). At timing t, second pulse Pis input. At that time point, since the CPUis normally operated, ignition timing is obtained from an ignition timing mapin accordance with the revolution number calculated by a time interval between the pulses Pand P, and the ignition instructions are output at timing tin accordance with the ignition timing. Thereafter, the ignition timing is determined using the ignition timing map

Engine starting apparatus

In an engine of a working machine having no governor mechanism, the engine revolution speed is controlled such that the revolution speed can stably be maintained irrespective of the variation in load without adjusting the throttle opening to exploit the full potential of the engine. Since an enginedoes not have the governor mechanism, an operator adjusts the throttle opening and controls the engine revolution speed. A map in which ignition timing (amount of angle of lead) is set by means of functions of the engine revolution speed is stored in an ignition timing map. The mapis set such that the engine revolution speed is equal to or higher than a value to be controlled (e.g. 7000 rpm), and the ignition timing is lagged as compared with a case in which the engine revolution speed is lower than the value to be controlled.

Engine revolution controller of working machine

In a fuel cut-off device for an engine in which one of a plurality of generating coils of a generator is connected to a normally-opened type solenoid valve adapted to block a fuel passage in a carburetor upon energization of the solenoid valve through an engine control switch adapted to be operated to a turned-off position and a turned-on position so that the solenoid valve can be energized from the one generating coil in the turned-off position of the switch, an output from the one generating coil is supplied to an electric load in the turned-on position of the engine control switch, together with outputs from the other generating coils. Thus, during operation of the engine, also the output from the one generating coil conventionally prepared for cutting off fuel is effectively supplied to the electric load, together with the outputs from the other generating coils, whereby the generating performance of the generator can be enhanced.

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Saitama, Japan

Mitsuyoshi Kanai