Ignition Timing Devices
Ignition timing devices are used on an engine,in order to ensure that the piston is in the right part of the combustion chamber, near the end of the compression stroke. If the piston is not in the correct place, it will cause the fuel and air mixture to not completely burn or it will cut the pistons cycle short before it gets all the way to the top of the combustion chamber. Both of these reduce the engines power output. Engine sparks that are not timed correctly can also cause severe engine vibrations and even permanent damage that can permanently damage the engine.
The main device that controls ignition timing in a modern engine is the engine control unit. This computer-like device is where the sensors are plugged in to, which means that it can take that information and change certain components in the engine accordingly. For older vehicles that do not have an engine control unit, a timing light or distributor weights can be used to control the ignition timing.
The factors that influence ignition timing are the intake valves, fuel injectors, the type of ignition system being 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 ignition system, and the settings of the ignition system components. During engine changes or major upgrades, it is important to tune the ignition timing settings because they are changed, when new components are added. It is a recommended to adjust the engine timing on a dyno because it simulates a driving environment, while allowing work to be done on the vehicle at the same time.
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