What is a distributor on a car?

A distributor on a car is a part of the ignition system that distributes high voltage from the ignition coil to the spark plugs in the correct firing order. It is typically located on the engine block and is driven by the engine's camshaft or the crankshaft.

The distributor consists of several key components, including a rotor, distributor cap, ignition coil, ignition module or points, and a condenser. The rotor is connected to the distributor shaft and rotates inside the distributor cap. As it rotates, the rotor passes each contact point inside the cap, sending a high voltage spark to the corresponding spark plug.

The distributor's primary function is to control the timing of the spark plug firing, which determines the combustion process inside the engine cylinders. By distributing the high voltage to each spark plug at the precise moment, the distributor ensures optimal engine performance, fuel efficiency, and ignition timing.

Modern cars mostly utilize electronic distributor-less ignition systems (DIS) or coil-on-plug (COP) systems, which eliminate the need for traditional distributors. However, older vehicles, particularly those with carbureted engines, often rely on distributors for ignition.

Regular maintenance of the distributor is important to ensure proper functioning of the ignition system. This includes checking and replacing worn-out distributor caps, rotors, and ignition modules. Additionally, regular tune-ups, such as adjusting ignition timing and replacing spark plugs and ignition wires, are necessary for optimal performance.

In recent years, electronic ignition systems have become more prevalent, replacing the traditional distributor with electronic sensors that directly supply the spark to each cylinder. This allows for more precise timing control, increased reliability, and improved engine performance.

Overall, a distributor is a critical component in the ignition system of a car, responsible for delivering the high voltage sparks to the spark plugs, ensuring efficient combustion and overall engine performance.