CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

摘要

Provided is a control device for an internal combustion engine, employing a microprocessor to control a load other than an ignition device, the control device being provided to an internal combustion engine in which is installed a magnet generator that has a magneto coil for successively generating, in association with revolution of the internal combustion engine, a first half wave voltage, a second half wave voltage of different polarity than the first half wave voltage, and a third half wave voltage of identical polarity to the first half wave voltage; and the magnet generator employing the second half wave voltage to drive the ignition device. The device is provided with an electricity storage element which draws excess power from the output that is output by the magnet generator for the purpose of driving the ignition device, and which is charged by the first and second half wave voltages, as well as being charged by the second half wave voltage as well at times that the internal combustion engine is in the exhaust stroke, in order to supply power to the load and to the microprocessor. The power source circuit is constituted to use the energy stored in this electricity storage element to generate power source voltage for presentation to the microprocessor and to the load other than an ignition device.

主权项

1. A control device for an internal combustion engine, employing a microprocessor to control a particular object to be controlled, the control device being provided to an internal combustion engine in which is installed a magnet generator having an ignition device-driving magneto coil for induction of alternating current voltage in association with revolution of the internal combustion engine, the half wave voltage induced in the magneto coil being employed for presenting ignition energy to an ignition device for ignition of the internal combustion engine;
wherein the control device for an internal combustion engine comprises: a power source circuit having a power source electricity storage element, the power source circuit generating a power source voltage for presentation to the microprocessor and a power source voltage for presentation to a load other than the ignition device, from energy stored in the power source electricity storage element; an electricity storage element charging unit for charging the power source electricity storage element by the half wave induction voltage of the magneto coil employed for presenting ignition energy to the ignition device when a charge-enable signal is presented from the microprocessor; and a stroke determination unit for determining the stroke of the internal combustion engine; and the microprocessor is programmed to generate the charge-enable signal when the stroke determination unit has determined that the stroke of the internal combustion engine is the exhaust stroke.