Ignition device of spark-ignition internal combustion engine
AssigneeMitsubishi Electric Corporation
InventorsTakashi HASHIMOTO, Tomokazu SAKASHITA, Takayoshi NAGAI
Life of this patent
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Abstract
In an ignition device of a spark-ignition internal combustion engine that performs ignition with high energy efficiency while reducing power to be input to a spark plug, after a DC-voltage-pulse generation circuit that generates a DC voltage pulse between electrodes of a spark plug is operated by a control circuit, an AC-pulse generation circuit that generates an AC pulse between the electrodes of the spark plug is operated. Furthermore, the control circuit controls the AC-pulse generation circuit with a plurality of group pulses and quiescent periods between the group pulses are provided.
Claims16
An ignition device of a spark-ignition internal combustion engine comprising:
- a DC-voltage-pulse generation circuit to generate a DC voltage pulse between electrodes of a spark plug positioned in an internal combustion engine;
- an AC-pulse generation circuit to generate an AC pulse between the electrodes of the spark plug;
- and
- a control circuit that controls such that the AC-pulse generation circuit operates after the DC-voltage-pulse generation circuit operates,
- and controls the AC-pulse generation circuit using a control signal having a plurality of group pulses, a quiescent period being provided between each of the group pulses in one ignition period, and setting the quiescent period longer as a time period that has passed since generation of the DC voltage pulse increases.
(canceled)
An ignition device of a spark-ignition internal combustion engine comprising:
- a DC-voltage-pulse generation circuit to generate a DC voltage pulse between electrodes of a spark plug positioned in an internal combustion engine;
- an AC-pulse generation circuit to generate an AC pulse between the electrodes of the spark plug, and
- a control circuit to control such that the AC-pulse generation circuit operates after the DC-voltage-pulse generation circuit operates,
- and control the AC-pulse generation circuit using a control signal having a plurality of group pulses, a quiescent period being provided between each of the group pulses in one ignition period, and setting the quiescent period shorter as a time period that has passed since generation of the DC voltage pulse increases.
An ignition device of a spark-ignition internal combustion engine comprising:
- a DC-voltage-pulse generation circuit to generate a DC voltage pulse between electrodes of a spark plug positioned in an internal combustion engine;
- an AC-pulse generation circuit that includes a reactor connected to the spark plug in series and a capacitor connected to the reactor and the spark plug in series, and is connected to the spark plug and the DC-voltage-pulse generation circuit in parallel;
- and
- a control circuit to control such that the AC-pulse generation circuit outputs AC pulses as a plurality of group pulses from the AC-pulse generation circuit after outputting a DC voltage pulse from the DC-voltage-pulse generation circuit in one ignition period.
Dependencies are inferred from the claim text.