Ignition device for monorotor rotary piston internal combustion engines

Claim 1

A monorotor rotary piston internal combustion engine comprising, a single housing having a multilobed inner peripheral surface, a single multilobed rotor mounted for rotation within said housing, said housing comprising an intake port and an exhaust port; in combination with an ignition system comprising, a breaker, a cam driven by the engine and cooperating with the breaker, an induction coil having a primary circuit and a secondary circuit and at least two spark plugs on said peripheral surface and connected to said secondary circuit operating together, the second said spark plug being located between the first said spark plug and said exhaust port, said breaker causing, particularly on opening but also on closing of the primary circuit of the coil, a voltage Peak of opening and of closing respectively at the terminals of said secondary circuit, and interrupting means in said secondary circuit adapted to prevent the voltage peak only of closing of the breaker from appearing at the electrodes of at least said first spark plug when the latter is in a combustion chamber of the engine at the beginning of compression.