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公开(公告)号：US3581720A
公开(公告)日：1971-06-01
申请号：US3581720D
申请日：1968-11-22
申请人： SILICON SYSTEMS INC
发明人： HEMPHILL LEWIS W , BLEVINS RONALD E
CPC分类号： F02P9/005
摘要： In the ignition system of an internal combustion engine a switching means is connected in series with the primary winding of an ignition coil. The switching means opens and closes to interrupt current flow through the primary winding generating ignition pulses in the secondary winding of the ignition coil at a frequency determined by the speed of the engine. A sensing means is responsively coupled to the switching means and generates an output signal when the engine reaches a predetermined r.p.m. A silicon-controlled rectifier connected in parallel with the switching means is gated on by the output signal of the sensing means to short out the switching means and thereby disable the ignition system. The silicon-controlled rectifier is turned off by the sensing means when the engine speed returns to an r.p.m. below the predetermined r.p.m. to allow the ignition system to function in a normal manner.
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公开(公告)号：US3581725A
公开(公告)日：1971-06-01
申请号：US3581725D
申请日：1968-09-09
申请人： SILICON SYSTEMS INC
发明人： HEMPHILL LEWIS W , BLEVINS RONALD E
CPC分类号： F02P7/073 , F02P3/0552
摘要： In an ignition system for an internal combustion engine a light beam incident upon a photocell is interrupted at a rate synchronized with the engine speed and angular position of the crankshaft generating timing pulses which are amplified and then shaped into square pulses by a pulse-shaping means and applied to a transistor switch in series with the primary winding of the ignition coil. The square pulses alternately open and close the transistor switch causing the ignition coil to generate ignition pulses in its secondary winding which are applied to the spark plugs of the engine.
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