Abstract: An internal combustion engine ignition device is provided in which an ECU (200) includes a pulse generation circuit (201) that outputs pulse signals (Igt1 and Igt2) and an ion-signal detection/control circuit (300), and a coil driver (400) includes a pulse detection circuit (7) that recognizes a signal received from the pulse generation circuit (201) and an ion-current detection circuit (9); when the pulse signals are not outputted, an ion current is detected and a signal is outputted at the same line as a coil-driver input signal line.

Abstract: An internal combustion engine ignition device is provided in which an ECU (200) includes a pulse generation circuit (201) that outputs pulse signals (Igt1 and Igt2) and an ion-signal detection/control circuit (300), and a coil driver (400) includes a pulse detection circuit (7) that recognizes a signal received from the pulse generation circuit (201) and an ion-current detection circuit (9); when the pulse signals are not outputted, an ion current is detected and a signal is outputted at the same line as a coil-driver input signal line.

Abstract: An ignition device, including: an ignition coil (1) having a primary coil and a secondary coil; a switching element (5) for causing a primary current to be conducted through and shut off from the primary coil of the ignition coil; a waveform shaping circuit (6) for shaping a waveform of an ignition signal transmitted from an outside through a signal line to supply a conduction signal thus obtained to the switching element; ion current detecting means (8, 9) connected to the secondary coil of the ignition coil, for detecting an ion current flowing through the secondary coil; and ion signal generating means (10, 11, 12) for outputting an ion signal, which indicates the ion current detected for a predetermined period after the conduction signal of the waveform shaping circuit has been turned off, to the outside through the signal line while invalidating the conduction signal from the waveform shaping circuit.

Abstract: An ignition apparatus for an internal combustion engine can be produced at low cost and small size by preventing the generation of a spark at a spark plug due to a turn-on voltage with a simple ignition coil construction having no energy loss. The apparatus include an ignition coil having a primary coil and a secondary coil, a spark plug to which a high voltage from the secondary coil is impressed, and a coil driver for driving the ignition coil. The coil driver has a switching element for controlling the primary current, an IC for driving the switching element, and a turn-on voltage prevention circuit inserted between a secondary coil low-voltage side terminal and ground. The turn-on voltage prevention circuit is composed of a parallel circuit comprising a diode in the form of a bare chip and a thick film resistor, and is mounted on the same substrate together with the IC.

Abstract: An ignition device, including: an ignition coil (1) having a primary coil and a secondary coil; a switching element (5) for causing a primary current to be conducted through and shut off from the primary coil of the ignition coil; a waveform shaping circuit (6) for shaping a waveform of an ignition signal transmitted from an outside through a signal line to supply a conduction signal thus obtained to the switching element; ion current detecting means (8, 9) connected to the secondary coil of the ignition coil, for detecting an ion current flowing through the secondary coil; and ion signal generating means (10, 11, 12) for outputting an ion signal, which indicates the ion current detected for a predetermined period after the conduction signal of the waveform shaping circuit has been turned off, to the outside through the signal line while invalidating the conduction signal from the waveform shaping circuit.

Abstract: An ignition apparatus for an internal combustion engine can be produced at low cost and small size by preventing the generation of a spark at a spark plug due to a turn-on voltage with a simple ignition coil construction having no energy loss. The apparatus include an ignition coil having a primary coil and a secondary coil, a spark plug to which a high voltage from the secondary coil is impressed, and a coil driver for driving the ignition coil. The coil driver has a switching element for controlling the primary current, an IC for driving the switching element, and a turn-on voltage prevention circuit inserted between a secondary coil low-voltage side terminal and ground. The turn-on voltage prevention circuit is composed of a parallel circuit comprising a diode in the form of a bare chip and a thick film resistor, and is mounted on the same substrate together with the IC.

Abstract: The ignition apparatus includes an electronic control unit and an igniter. The igniter detects ions resulting from ignition, and sends an ion current output signal to the electronic control unit. The igniter has a waveform shaping circuit and an ion current detecting/outputting circuit. The waveform shaping circuit is adapted such that a voltage at an input terminal thereof becomes higher than a predetermined reference voltage to turn the switching element ON when the ignition signal is caused to flow through an electric load. The ion current detecting/outputting circuit has an output terminal which is connected to the input terminal and outputs therefrom an ion current output signal obtained as a result of conversion of an ion current, and is adjusted such that the voltage at the input terminal at the time when the ion current output signal is outputted to the electronic control unit becomes lower than the reference voltage.

Abstract: The ignition apparatus includes an electronic control unit and an igniter. The igniter detects ions resulting from ignition, and sends an ion current output signal to the electronic control unit. The igniter has a waveform shaping circuit and an ion current detecting/outputting circuit. The waveform shaping circuit is adapted such that a voltage at an input terminal thereof becomes higher than a predetermined reference voltage to turn the switching element ON when the ignition signal is caused to flow through an electric load. The ion current detecting/outputting circuit has an output terminal which is connected to the input terminal and outputs therefrom an ion current output signal obtained as a result of conversion of an ion current, and is adjusted such that the voltage at the input terminal at the time when the ion current output signal is outputted to the electronic control unit becomes lower than the reference voltage.

Abstract: An internal combustion engine ignition apparatus includes a switching circuit having no power supply terminal connected to a power supply such as a battery is constructed, and including an output terminal connected to an ignition coil, an input terminal for receiving an ignition signal voltage and a reference potential terminal connected to a reference potential. In the switching circuit, the terminal structure is simplified, and energization timing and ignition timing can be set more accurately. A current supply circuit is connected between the input terminal and the reference potential terminal, and a current is supplied from the current supply circuit to a drive resistor of the switching element. In this current supply circuit, an energization timing when supply of the driving current is started is controlled by a waveform shaping circuit operating by the ignition signal voltage, and an ignition timing when the driving current is interrupted is controlled.

Abstract: An ignition apparatus for an internal combustion engine is capable of avoiding mis-ignition even if subject to external disturbances when a fail signal is transmitted through a common signal line on which an ignition signal can also be transmitted. An igniter is connected to receive the ignition signal from an ECU, and includes a waveform shaper connected with the signal line and having an input connected in parallel to an input resistance so as to make a voltage at the input higher than a prescribed voltage when the ignition signal flows into the input resistance, and a pulse output circuit connected to the input and having an output for generating the fail signal into which a secondary coil current is converted. The pulse output circuit adjusts a fail signal current such that the voltage at the input when the fail signal flows into the input resistance becomes less than the prescribed voltage.

Abstract: An ignition apparatus for an internal combustion engine is capable of avoiding mis-ignition even if subject to external disturbances when a fail signal is transmitted through a common signal line on which an ignition signal can also be transmitted. An igniter is connected to receive the ignition signal from an ECU, and includes a waveform shaper connected with the signal line and having an input connected in parallel to an input resistance so as to make a voltage at the input higher than a prescribed voltage when the ignition signal flows into the input resistance, and a pulse output circuit connected to the input and having an output for generating the fail signal into which a secondary coil current is converted. The pulse output circuit adjusts a fail signal current such that the voltage at the input when the fail signal flows into the input resistance becomes less than the prescribed voltage.

Abstract: There is proposed an internal combustion engine ignition apparatus in which a switching circuit having no power supply terminal connected to a power supply such as a battery, and includes an output terminal connected to an ignition coil, an input terminal for receiving supply of an ignition signal voltage, and a reference potential terminal connected to a reference potential. A current supply circuit is connected between the input terminal and the reference potential terminal, and a current is supplied from the current supply circuit to a drive resistor of the switching element. This current supply circuit is controlled by a constant current circuit, and supplies a driving current, which is made a constant current, to the drive resistor between a rising portion of the ignition signal voltage and a falling portion thereof. The driving current, which is made the constant current, keeps the gate voltage of the switching element being constant in the on period.

Abstract: There is proposed an internal combustion engine ignition apparatus in which a switching circuit having no power supply terminal connected to a power supply such as a battery, and includes an output terminal connected to an ignition coil, an input terminal for receiving supply of an ignition signal voltage, and a reference potential terminal connected to a reference potential. A current supply circuit is connected between the input terminal and the reference potential terminal, and a current is supplied from the current supply circuit to a drive resistor of the switching element. This current supply circuit is controlled by a constant current circuit, and supplies a driving current, which is made a constant current, to the drive resistor between a rising portion of the ignition signal voltage and a falling portion thereof. The driving current, which is made the constant current, keeps the gate voltage of the switching element being constant in the on period.

Abstract: An internal combustion engine ignition apparatus includes a switching circuit having no power supply terminal connected to a power supply such as a battery is constructed, and including an output terminal connected to an ignition coil, an input terminal for receiving an ignition signal voltage and a reference potential terminal connected to a reference potential. In the switching circuit, the terminal structure is simplified, and energization timing and ignition timing can be set more accurately. A current supply circuit is connected between the input terminal and the reference potential terminal, and a current is supplied from the current supply circuit to a drive resistor of the switching element. In this current supply circuit, an energization timing when supply of the driving current is started is controlled by a waveform shaping circuit operating by the ignition signal voltage, and an ignition timing when the driving current is interrupted is controlled.

Abstract: The ignition device for an internal combustion engine includes, a control unit (1) for outputting an ignition signal used to determine a time when an ignition plug (8) should be ignited, a switching unit (5) connected to the other terminal of a primary coil for cutting off the flow of a primary current, and a drive unit (4) for turning ON or OFF the switching unit (5) in response to the ignition signal to adjust a voltage to be applied to a gate of the switching unit (5).

Abstract: An ignition device for an internal combustion engine includes a control circuit that generates an ignition signal for allowing or interrupting the supply of a primary current of an ignition coil under control, a waveform shaping circuit that waveform-shapes the ignition signal, a switching element that allows and interrupts the supply of the primary current on the basis of the ignition signal that is waveform-shaped to generate a high voltage on a secondary side of the ignition coil, and an over-current protection circuit that forcedly interrupts the supply of the primary current and holds an interrupt state until the ignition signal turns off when the primary current of the ignition coil exceeds a given value.

Abstract: An ignition device for an internal combustion engine includes a control circuit that generates an ignition signal for allowing or interrupting the supply of a primary current of an ignition coil under control, a waveform shaping circuit that waveform-shapes the ignition signal, a switching element that allows and interrupts the supply of the primary current on the basis of the ignition signal that is waveform-shaped to generate a high voltage on a secondary side of the ignition coil, and an over-current protection circuit that forcedly interrupts the supply of the primary current and holds an interrupt state until the ignition signal turns off when the primary current of the ignition coil exceeds a given value.

Abstract: The ignition device for an internal combustion engine includes, a control unit (1) for outputting an ignition signal used to determine a time when an ignition plug (8) should be ignited, a switching unit (5) connected to the other terminal of a primary coil for cutting off the flow of a primary current, and a drive unit (4) for turning ON or OFF the switching unit (5) in response to the ignition signal to adjust a voltage to be applied to a gate of the switching unit (5).