The role of the crankshaft sensor

An engine ignition time ( say a little simple, it is the moment of spark ignition , the corresponding crankshaft position ) , is to be very accurate ( correct to say that there is a range in which the crankshaft to an angle within the range requiring Fireworks plug ignition , not to this position the crankshaft , the ignition spark plug , the engine is possible that the normal work ) , the carburetor before the car, with a mechanical power switch to control the spark plug , Just go to Camshaft Position Sensor , spark plugs will ignite. . . Now all electronically controlled , and , then , go to the computer you want to know what the crankshaft angle ( position ) , you can only think of ways to engage an electrical signal , let the computer know what angle to the crankshaft in the end , but to the best one ignition position , the computer controlled ignition . . . . Second, the crankshaft position only to have strict requirements ignition timing , fuel injection is relatively minor, because , injection slowly earlier , the impact of work on launching fee is not great, but , if ignition is not normal , then a great impact . Third, there is a common crank Car Temperature Sensor , electromagnetic ( on a side of the crankshaft gear . Front chainring ) , a simplified physical model is a small permanent magnet generator , it is the most common kind , ,,, , the other type of photoelectric ( a small disc , open at the many small holes in the upper and lower plate , mounting points corresponding to the device and the photosensitive device , a light emitting element , the light emitted when the circle hole position to the disk , the light shine on the photosensitive member following the reception of light ) , light is actually a simplified model of the battery , there is a Hall sensor . . , Swiss road running car , more than 95 % of all first .