High speed spark advancer for an internal combustion engine ignition system

An internal combustion engine having a combustion chamber cooperating with an ignition system to provide internal combustion to generate a mechanical output, said ignition system comprising:

• (A) at least one first switch operatively connecting a first capacitive energy source to a chamber,
• (B) at least one second switch operatively connecting a second capacitive energy source to actuate the first switch,
• (C) an alternator operated by the mechanical output and connected to provide at least one timing signal to actuate the second switch at a first predetermined time when the timing signal exceeds a biasing signal provided by a biasing source to actuate the first switch to conduct energy from the first source to the chamber to provide a spark for ignition, and
• (D) a high speed spark advancer connected to the engine to sense speed and to the biasing source to vary the biasing signal between a first biasing relationship to provide a first spark angle and a second biasing relationship to provide a second spark angle substantially less than the first angle,
• said spark advancer including:
• (1) speed sensing means connected to the ignition system to respond to only single pulse during each operating cycle of the engine,
• (2) speed switch means connected to said speed sensing means and operable between a first condition when the engine operates at and above a predetermined speed and a second condition when the engine operates below said predetermined speed, and
• (3) spark advance control means connected to said speed switch means and to the biasing source to selectively provide the first biasing relationship in response to said first condition to provide said first spark angle when operating at and above said predetermined speed and to provide the second biasing relationship in response to said second condition to provide the second spark angle and exhibiting a substantial step type transfer from the first spark angle to the second spark angle to reduce the likelihood of detonation within the combustion chamber.