Back to results
US 4,382,430 AGranted
Ignition system
OwnerShinichiro Iwasakiinventor
Life of this patent
Estimating the term…
Abstract
An ignition system for an internal combustion engine is disclosed which includes a separate ignition transformer for each spark plug in the engine. Each of the ignition transformers is enabled by means of signals produced by a crankshaft position sensor. Pulsating DC currents are then caused to flow in the primary windings of the ignition transformer thereby inducing a high voltage into a secondary winding of the transformer. A combination ignition transformer and spark plug cover is also disclosed.
Claims5
An ignition system for an internal combustion engine, comprising:
- crankshaft position sensor means coupled to a crankshaft of said engine for periodically supplying a first voltage to an output of said sensor means in synchronism with the rotation of said crankshaft;
- oscillator means for producing an AC output signal;
- electronic switch means coupled to receive said AC output signal from said oscillator means for alternatingly supplying a second voltage to first and second outputs of said switch means in synchronism with said AC output signal;
- an ignition transformer having a primary winding including a center tap and a secondary winding, said center tap of said primary winding being coupled to receive said first voltage from said output of said sensor means, a first terminal of said primary winding being coupled to receive said second voltage from said first output of said switch means, a second terminal of said primary winding being coupled to receive said second voltage from said second output of said switch means, said transformer inducing a high voltage into said secondary winding when said first and second voltages are simultaneously applied to said primary winding;
- and
- spark plug means coupled to receive said high voltage induced into said secondary winding of said transformer for producing an arc upon receipt of said high voltage.
3 more elements
An ignition system for an internal combustion engine, comprising:
- crankshaft position sensor means coupled to a crankshaft of said engine for sequentially supplying a first voltage to a plurality of output terminals in synchronism with the rotation of said crankshaft, one of said output terminals being associated with each cylinder of said engine;
- oscillator means for producing an AC output signal;
- electronic switch means coupled to receive said AC output signal from said oscillator means for alternatingly supplying a second voltage to first and second outputs of said switch means in synchronism with said AC output signal;
- a plurality of high voltage generator means, one of said generator means being associated with each cylinder of said engine, each of said generator means being coupled to receive said first voltage from one of said output terminals of said position sensor means and being coupled to receive said second voltage from said first and second outputs of said switch means for producing a high voltage output when said first and second voltages are simultaneously received;
- a plurality of spark plug means, one of said spark plug means being associated with each cylinder of said engine, each spark plug means being coupled to receive the high voltage output of one of said high voltage generator means for producing an arc upon receipt of said high voltage output.
2 more elements
Dependencies are inferred from the claim text.