Rapid Multiple Spark Ignition
First Claim
1. An ignition system for an internal combustion engine, comprising at least one voltage supply, at least one ignition transformer (8), at least one spark plug (5) and at least one control logic (ME, 13), with the control logic being used to switch a power switch (Q1) in the ground path of the primary winding (L1) of the ignition transformer, as a result of which the ignition transformer is charged and discharged a number of times within an ignition time window,characterizedin that the output voltage of the voltage supply is stepped up by a DC converter (12) and is applied to the primary winding of the ignition transformer,and in that the power switch is switched on and off a number of times within an ignition time window by a time control arrangement which is implemented in the control logic (ME, 13).
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Accused Products
Abstract
The invention relates to rapid multiple ignition, in which the maximum breakdown voltage for the spark breakdown is available a number of times during an ignition time window. The ignition system operates with a DC converter with which the voltage of the on-board vehicle electrical system is increased, and with rod-type ignition transformers whose minimized ignition coils permit rapid recharging. The ignition electronics operate with a power output stage which charges the rod-type ignition transformer by switching a power switch in the ground path of the primary winding. The output stage power switch is actuated by a time control arrangement which clocks the power switch for charging the rod-type ignition transformer and connects the primary side of the ignition transformer to ground for a prespecified time period in order to achieve the spark breakdown after charging of the ignition transformer.
25 Citations
17 Claims
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1. An ignition system for an internal combustion engine, comprising at least one voltage supply, at least one ignition transformer (8), at least one spark plug (5) and at least one control logic (ME, 13), with the control logic being used to switch a power switch (Q1) in the ground path of the primary winding (L1) of the ignition transformer, as a result of which the ignition transformer is charged and discharged a number of times within an ignition time window,
characterized in that the output voltage of the voltage supply is stepped up by a DC converter (12) and is applied to the primary winding of the ignition transformer, and in that the power switch is switched on and off a number of times within an ignition time window by a time control arrangement which is implemented in the control logic (ME, 13).
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8. An ignition method for an internal combustion engine, in which:
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an ignition coil is charged with a voltage supply by a primary current (Ip) being switched through a primary winding (L1) of an ignition coil (8), a first spark breakdown is generated at a spark plug (5) by the primary current (Ip) being interrupted, and the ignition coil is recharged after the first spark breakdown by the primary current (Ip) being reestablished, characterized in that the output voltage of the voltage supply is stepped up to a voltage level higher than 14 volts by a DC converter, and in that the spark breakdown is generated by a time control arrangement with prespecified breakdown times (toff) for the primary current (Ip). - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 17)
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Specification