The objective is to obtain an internal-combustion-engine ignition apparatus that raises the ignitability at a time when a smolder occurs. An internal-combustion-engine ignition apparatus having a main combustion chamber and a subsidiary combustion chamber includes an ignition plug, an ignition coil having a primary coil, a secondary coil, and a tertiary coil, a first switching circuit that turns on or off energization of the primary coil, a second switching circuit that turns on or off energization of the tertiary coil, and a control apparatus that estimates a combustion state, that performs on/off-control of the first switching circuit so that a spark discharge is produced in the ignition plug and that performs on/off-control of the second switching circuit so that magnetic flux in the tertiary coil is changed so as to increase a secondary current, when deterioration of a combustion state has been estimated.

An ignition coil unit includes: an ignition circuit including a primary coil and a secondary coil; a power generator including a generator coil; a controller configured to control an ignition timing of the ignition circuit by an input signal generated by an induced voltage of the generator coil; and a sensor configured to input load information to the controller. The controller includes a memory configured to store working time information which corresponds to operating information based on the input information and the load information, as matrix data composed of the operating information, the load information and time data.

An ignition coil unit includes: an ignition circuit including a primary coil and a secondary coil; a power generator including a generator coil; a controller configured to control an ignition timing of the ignition circuit by an input signal generated by an induced voltage of the generator coil; and a sensor configured to input load information to the controller. The controller includes a memory configured to store working time information which corresponds to operating information based on the input information and the load information, as matrix data composed of the operating information, the load information and time data.

In an engine ignition method according to the present invention, an ignition coil and an exciter coil are provided in a magneto generator driven by an engine. After charging an ignition capacitor using an output voltage of the exciter coil, the ignition capacitor is discharged through a primary coil of the ignition coil at an ignition timing of the engine, whereby a high voltage induced in a secondary coil of the ignition coil is applied to an ignition plug and a first spark discharge is generated in the ignition plug, and a voltage induced in the secondary coil of the ignition coil accompanied with rotation of the magneto rotor is applied to the ignition plug in a state that insulation across discharge gaps of the ignition plug is broken down due to the first spark discharge, whereby a second spark discharge is produced in the ignition plug.

In an engine ignition method according to the present invention, an ignition coil and an exciter coil are provided in a magneto generator driven by an engine. After charging an ignition capacitor using an output voltage of the exciter coil, the ignition capacitor is discharged through a primary coil of the ignition coil at an ignition timing of the engine, whereby a high voltage induced in a secondary coil of the ignition coil is applied to an ignition plug and a first spark discharge is generated in the ignition plug, and a voltage induced in the secondary coil of the ignition coil accompanied with rotation of the magneto rotor is applied to the ignition plug in a state that insulation across discharge gaps of the ignition plug is broken down due to the first spark discharge, whereby a second spark discharge is produced in the ignition plug.

A spark plug includes a metal body member formed of a metal material, an insulating body member provided inside the metal body member and formed of an insulating material, a pair of central electrodes provided inside the insulating body member and having different polarities, and a ground electrode extending from the metal body member between a pair of central electrodes.

An object is to improve scavenging performance of a pre-combustion chamber connected to a main combustion chamber via an orifice and suppress reduction in combustion performance of an internal combustion engine. This control device for an internal combustion engine including a main combustion chamber and a pre-combustion chamber having at least one orifice between the pre-combustion chamber and the main combustion chamber, includes a first control device which controls operation of an ignition coil to generate spark discharge at a spark plug, thus combusting fuel gas, and a second control device which controls operation of the ignition coil at a timing other than the timing of combusting the fuel gas, to promote scavenging of the pre-combustion chamber.

This present disclosure discloses an ignition overcurrent protection device, which includes a switch, a current detection circuit, and a controller. The switch is electrically coupled between a starting power and a power-on connector; the power-on connector is configured for connecting to the automotive power. The current detection circuit is configured for detecting a current value flowing between the starting power and the power-on connector. The controller is coupled to the switch and the current detection circuit. The controller is configured to determine a current range where the current value is located, and determine a preset time threshold corresponding to the current range, and control the switch to be turned off when a duration of the current value reaches the preset time threshold. The present disclosure also provides a starting power equipment and ignition overcurrent protection.

An internal-combustion-engine control apparatus according to the present disclosure controls an internal combustion engine having a main combustion chamber, a subsidiary combustion chamber, an ignition plug that is disposed in the subsidiary combustion chamber, an ignition coil connected with the ignition plug, and an orifice for connecting the subsidiary combustion chamber with the main combustion chamber and for injecting combustion gas in the subsidiary combustion chamber into the main combustion chamber; the internal-combustion-engine ignition apparatus includes an ignition control unit that controls energization of the ignition coil so that an ignition discharge for igniting a fuel-air mixture in the subsidiary combustion chamber is produced across the ignition plug, and a pressure-boosting control unit that controls energization of the ignition coil so that a pressure-boosting discharge for increasing a pressure of combustion gas in the subsidiary combustion chamber is produced across the ignition plug.

The objective is to obtain an internal-combustion-engine ignition apparatus that raises the ignitability at a time when a smolder occurs. An internal-combustion-engine ignition apparatus having a main combustion chamber and a subsidiary combustion chamber includes an ignition plug, an ignition coil having a primary coil, a secondary coil, and a tertiary coil, a first switching circuit that turns on or off energization of the primary coil, a second switching circuit that turns on or off energization of the tertiary coil, and a control apparatus that estimates a combustion state, that performs on/off-control of the first switching circuit so that a spark discharge is produced in the ignition plug and that performs on/off-control of the second switching circuit so that magnetic flux in the tertiary coil is changed so as to increase a secondary current, when deterioration of a combustion state has been estimated.