A geared noncircular crankpin path holds minimum combustion volume past TDC, improving torque, ignition flexibility, and fuel use.
Tertiary coils reduce secondary current to stabilize spark discharge and prevent blowouts in dilute fuel-air mixtures.
An intake duct restrictor minimizes the auxiliary passage area to increase flow velocity, resolving oversized upstream areas that reduce engine power.
Full-time lean running aircraft piston engines maintain lean air fuel ratios during normal operation to save significant fuel.
A separate coil monitors magnetic flux independently, eliminating spark generation disturbances that compromise measurement precision and spark timing accuracy.
A vehicle electricity supply device uses a diode to activate the main relay coil before the starter motor engages.