Internal-combustion engines – High tension ignition system – Having a specific ignition coil
Reexamination Certificate
2007-02-27
2007-02-27
Solis, Erick (Department: 3747)
Internal-combustion engines
High tension ignition system
Having a specific ignition coil
C361S263000
Reexamination Certificate
active
11438946
ABSTRACT:
A high energy density and high efficiency inductive ignition coil for IC engine achieved by the use of biasing magnets (14/15) located at the end (16/17) of an open-E laminated core to raise the coil energy to five times typical, i.e. of approximately 150 mj and to double the coil efficiency including novel use of coil winding structure (12/13/20/21) with a primary winding turns (Np) of between 70 and 86 and primary inductance Lp of between 700 uH and 1,100 uH, and a low turns ratio (Nt) of 53 to 67 allowing for a short, efficient, cylindrical coil, with secondary turns (Ns) of 4,000 to 5,000 turns with current of approximately 330 ma which is predominantly in the high glow and low arc discharge mode, with a special ratio R defined as Np/Nt and equal to between 1.15 to 1.45, and the coil being small and light enough to be directly mounted on the spark plugs or near the plugs in a region of high squish flow in an engine.
REFERENCES:
patent: 5315982 (1994-05-01), Ward et al.
patent: 6142130 (2000-11-01), Ward
patent: 6545415 (2003-04-01), Ward
Burns & Levinson LLP
Cohen Jerry
Solis Erick
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