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2. Ignition timing - Wikipedia

   en.wikipedia.org/wiki/Ignition_timing

   These include the timing of the intake valve(s) or fuel injector(s), the type of ignition system used, the type and condition of the spark plugs, the contents and impurities of the fuel, fuel temperature and pressure, engine speed and load, air and engine temperature, turbo boost pressure or intake air pressure, the components used in the ...

3. Fuel injection - Wikipedia

   en.wikipedia.org/wiki/Fuel_injection

   Fuel injection is the introduction of fuel in ... Another early spark-ignition engine to use direct-injection was the 1925 ... then ignited with a spark plug. ...

4. Spark plug - Wikipedia

   en.wikipedia.org/wiki/Spark_plug

   Spark plug with single side electrode An electric spark on the spark plug. A spark plug (sometimes, in British English, a sparking plug, [1] and, colloquially, a plug) is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within ...

5. Firing order - Wikipedia

   en.wikipedia.org/wiki/Firing_order

   For this inline-4 engine, 1-3-4-2 could be a valid firing order.. The firing order of an internal combustion engine is the sequence of ignition for the cylinders.. In a spark ignition (e.g. gasoline/petrol) engine, the firing order corresponds to the order in which the spark plugs are operated.

6. Gasoline direct injection - Wikipedia

   en.wikipedia.org/wiki/Gasoline_direct_injection

   In engines with wall-guided injection, the distance between spark plug and injection nozzle is relatively high. In order to get the fuel close to the spark plug, it is sprayed against a swirl cavity on top of the piston (as seen in the picture of the Ford EcoBoost engine on the right), which guides the fuel towards the spark plug.

7. Ignition system - Wikipedia

   en.wikipedia.org/wiki/Ignition_system

   A variation coil-on-plug ignition has each coil handle two plugs, on cylinders which are 360 degrees out of phase (and therefore reach top dead center (TDC) at the same time); in the four-cycle engine this means that one plug will be sparking during the end of the exhaust stroke while the other fires at the usual time, a so-called "wasted spark ...