Engine ignition system
First Claim
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1. An engine ignition system comprising:
- an ignition coil having a primary winding and a secondary winding;
a first electrical-energy application means for applying a first electrical energy to the primary winding, wherein an ordinary secondary current is generated to flow through the secondary winding by turning on and off flow of a primary current through the primary winding with the first electrical energy applied to the primary winding; and
a second electrical-energy application means, provided in addition to the first electrical-energy, for applying a second electrical energy and generating a large secondary current greater than the ordinary secondary current in the secondary winding.
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Abstract
An engine ignition system has, in addition to a DC/DC converter for applying a first voltage to a primary winding of an ignition coil, a second DC/DC converter is provided for applying a second voltage higher than the first voltage to the primary winding. The second DC/DC converter operates only in a super lean-burn operation and causes a large secondary current having a magnitude of several hundreds of mA to flow through the secondary winding. Thus, the secondary current supplied to an ignition plug can be changed from a magnitude of several tens of mA in a normal operation to several hundreds of mA in the super lean-burn operation.
27 Citations
10 Claims
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1. An engine ignition system comprising:
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an ignition coil having a primary winding and a secondary winding;
a first electrical-energy application means for applying a first electrical energy to the primary winding, wherein an ordinary secondary current is generated to flow through the secondary winding by turning on and off flow of a primary current through the primary winding with the first electrical energy applied to the primary winding; and
a second electrical-energy application means, provided in addition to the first electrical-energy, for applying a second electrical energy and generating a large secondary current greater than the ordinary secondary current in the secondary winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification