JP2014206061A5 - - Google Patents

Description

This onset Ming, at least, a DC power supply (10), a boosting circuit for boosting the power supply voltage of the DC power supply (10) (2), the current of the primary coil was allowed connected to said boosting circuit (2) (41) The ignition coil (4) that generates a high voltage in the secondary coil (42) due to the increase / decrease of the current, and the supply of current to the primary coil (41) according to the ignition signal (IGt) transmitted according to the operating condition of the engine An ignition switching element (5) for switching between and off is connected to the secondary coil (42), and a secondary voltage (V2) from the secondary coil (42) is applied to spark in the combustion chamber of the internal combustion engine. An ignition device for igniting an internal combustion engine, comprising an ignition plug (7) for generating electric discharge,
By opening and closing of the ignition switching element (5), said ignition plug (7) Subeku the d Nerugi after starting the discharge of the input, superimposed manner perform it and stopping discharge from the booster circuit (2) The auxiliary power source (3) for increasing the current flowing through the secondary coil (42) and the primary voltage (V1) applied to the primary coil (41) after the discharge of the spark plug (7) is started. ) Detecting a primary voltage detection circuit (61), and an auxiliary power supply necessity determination circuit (62) for determining whether the auxiliary power supply (3) is driven according to the detected primary voltage (V1). Comprising primary voltage monitoring means (6) comprising :
The auxiliary power supply necessity determination circuit (62) determines that it is not necessary to input energy from the auxiliary power supply (3) when the primary voltage (V1) is equal to or lower than a predetermined threshold value (Vref). When the primary voltage (V1) exceeds a predetermined threshold value (Vref), it is determined that it is necessary to input energy from the auxiliary power supply (3) .

Claims (5)

At least a secondary by increasing or decreasing the current of the DC power source (10), the booster circuit (2) that boosts the power supply voltage of the DC power source (10), and the primary coil (41) connected to the booster circuit (2). An ignition coil (4) that generates a high voltage in the coil (42), and an ignition that switches between supply and interruption of current to the primary coil (41) in accordance with an ignition signal (IGt) that is transmitted according to the operating state of the engine Opening / closing element (5) and ignition connected to the secondary coil (42) and generating a spark discharge in the combustion chamber of the internal combustion engine by application of the secondary voltage (V2) from the secondary coil (42) An ignition device for igniting an internal combustion engine comprising a plug (7),
By opening and closing the ignition switching element (5), the discharge from the booster circuit (2) and the stop are performed in a superimposed manner so as to input energy after starting the discharge of the spark plug (7). An auxiliary power source (3) for increasing the current flowing in the secondary coil (42), and a primary voltage (V1) applied to the primary coil (41) after the discharge of the spark plug (7) is started. A primary voltage detection circuit (61) to detect and an auxiliary power source necessity determination circuit (62) for determining whether or not the auxiliary power source (3) is driven according to the detected primary voltage (V1). Comprising primary voltage monitoring means (6) ,
The auxiliary power supply necessity determination circuit (62) determines that it is not necessary to input energy from the auxiliary power supply (3) when the primary voltage (V1) is equal to or lower than a predetermined threshold value (Vref). When the primary voltage (V1) exceeds a predetermined threshold value (Vref), it is determined that it is necessary to input energy from the auxiliary power supply (3) .   The booster circuit (2) has a predetermined supply and interruption of current to the inductor (20) for a predetermined period in accordance with the energy storage inductor (20) connected to the DC power supply (10) and the ignition signal IGt. An opening / closing element (21) that switches at a period of, a capacitor (23) connected in parallel to the inductor (20), and a first rectifying element (rectifying current from the inductor (20) to the capacitor (23)) 24) The ignition device (1, 1a) according to claim 1,   The auxiliary power source (3) is interposed between the capacitor (23) and the primary coil (41), and an auxiliary opening / closing element (30) for switching between discharging and stopping from the capacitor (23), The second rectifier element (32) for rectifying the current from the capacitor (23) to the primary coil (41), the DC power source (10), the inductor (20), and the capacitor (23). The ignition device (1, 1a) according to claim 2, An energy input scheduled period (TwP) for driving the auxiliary power supply (3) is determined based on an energy input period signal (IGw) set in advance according to the operating state of the internal combustion engine, and the auxiliary power supply necessity determination is performed. The ignition device ( 1 ) according to any one of claims 1 to 3, wherein an energy input execution period (TwA) for actually driving the auxiliary power supply (3) is determined with priority given to a determination result of the circuit (62 ). The ignition device (1 , 1a ) according to any one of claims 1 to 4, wherein energy input from the auxiliary power supply (3) is performed from a low voltage side of the primary coil (41 ).