The invention can be used for operating the engine with optimal stoichiometric mixture and ignition advance without the occurrence of rattling.
In the absence of pinking, the actual spark timing is advanced to the predetermined value of the characteristic field (FK) in the direction 'ignition advance'.
Ignition advance curve or map  Specify the tolerance.
Ignition advance curve  Strike out what does not apply.
Ignition advance curve  Specify the tolerance.
Also disclosed is a gasoline having low octane (82-87) which can be used interchangeably in engines having a reduced spark advance and in engines having conventional spark advance.
This velocity proportional ignition (524) system provides spark advance on a stroke by stroke basis as an aid to starting the engine.
The ignition timing of the engine is corrected by the use of the spark advance correction value.
When a change in the combustion is detected, the target fuel injection timing, target ignition timing and target EGR percentage are retarded or decreased.
Thus, knocking is less apt to occur even if thermal efficiency is improved by increasing a compression ratio and advancing the ignition timing.
A timing analyzer for engine diagnostic testing includes a variabel sensitivity knob for testing ignition timing for both a conventional four stroke engine and a DIS four stroke engine.
An engine timing apparatus uses a timing light (20), controlled by a digital computer (48), to determine engine timing advance angle.