F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.4
F02P 3/045 (2006.01)
Patent
CA 1317997
ABSTRACT The system comprises: - a magnetic pulse generator for outputting a signal having a frequency and amplitude proportional to the rate of rotation of the engine, - an ignition coil the secondary winding of which can be coupled selectively and cyclically to the plugs of the engine to generate the spark, - a switching transistor connected to the primary winding of the coil, and - a control circuit which is connected to the pulse generator and to the switching transistor and which, in order to cause a spark to be generated, is arranged to cause the transistor to become saturated at a first moment (determined according to the characteristics of the signal form the pulse generator) to enable the passage of current in the primary winding of the coil, the desaturation of the transistor immediately the current has reached a predetermined value to limit the intensity of the current, and - the cutting off of the transistor at a second moment determined by the characteristics of the signal from the pulse generator to interrupt the current. The control circuit includes a circuit for regulating the time taken to desaturate the switching transistor. This regulating circuit is arranged to control the time for which the transistor is conductive, so that the desaturation time of the transistor is substantially nil when the rate of rotation of the engine is greater than the predetermined value.
559804
Lasagna Diego
Mandara Francesco Paolo
Lasagna Diego
Macrae & Co.
Mandara Francesco Paolo
Marelli Autronica S.p.a.
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