The Car’s Ignition system consists of an ignition coil, distributor, distributor cap, rotor, plug wires and spark plugs. The Ignition system on your Car has to work in perfect concert with the rest of the engine. The goal is to ignite the fuel at exactly the right time so that the expanding gases can do the maximum amount of work. Modern engine designs have a Distributor function in the primary circuit electronically and applying the primary pulse to individual coils for each spark plug, or one coil for each pair of companion cylinder. Older Car distributors were equipped with breaker points that have another section in the bottom half of the distributor which aids in the job of breaking the current to the coil.
The Ignition distributes high voltage current from the coil to the correct cylinder required which is done by the cap and rotor, the coil is connected to the rotor, which spins inside the cap. As the tip of the rotor passes each contact, a high-voltage pulse comes from the coil, this pulse arcs across the small gaps between the rotors and the contacts which then continues down the spark-plug wire to the spark plug on the appropriate cylinder.
DISTRIBUTOR CAR PART
Spark timing is very critical to a Car’s engine performance that most of them use a sensor that tells the engine control unit the exact position of the pistons. The engine control unit then controls a transistor that opens and closes the current to the coil. A cam in the center of the distributor pushes a lever connected to one of the points. Whenever the cam pushes the lever, it opens the points. This causes the coil to suddenly lose its ground, generating a high-voltage pulse. These mechanisms advance the timing in proportion to engine load or engine speed.
As a significance of a flawless engine timing, most modern engines today use computers to time the electric pulses that initiate a spark in each cylinder which is achieved by the ECU knowing the firing order of the motor and by looking at the cam or crank angle sensors.
Ignition Timing is Managed by Distributor
When a regular tune-up of your Car engine is done, one of the things mostly replaced is the cap & the rotor these eventually wear out as of arcing. The spark-plug wires also eventually wear out and lose some of their electrical insulations on them. This can be the cause of some very complex engine problems which are hard to detect.
Repairing of your Car’s Ignition Distributor could be beyond the abilities of a do-it-yourself as it often requires specialized training and tools. In case, you are not confident about pulling off this procedure, you could take the help of your friendly next door Car mechanic.
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