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Solid state ignition system and method for linearly regulating the dwell time thereof
Solid state ignition system and method for linearly regulating the dwell time thereof
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机译:固态点火系统及其线性调节停留时间的方法
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摘要
An electronic, solid-state ignition system for an internal combustion engine is disclosed which is responsive to alternating timing signals produced in timed relationship with the engine. The electronic system comprises a plurality of integrator circuits, as transistorized output stage and a feedback loop for linearly regulating the current limit duty cycle to a fixed percentage of the firing cycle time period independent of current ramp time through the coil. A further circuit also responsive to the timing signals is included, which circuit overrides the aforementioned electronic system below a predetermined engine rpm. The overriding circuit effects a desired lead angle to the timing signals applied thereto to produce a minimum dwell angle for engine speeds below the predetermined engine rpm. As a result, sufficient spark potential is developed and predetermined spark timing is produced, with minimum power consumption in the ignition system, thereby preventing misspark even though the engine may be accelerating at a maximum specified rate or decelerating.
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