A distributor is an electric and mechanical device used in the ignition system of older spark ignition engines . The distributor's main function is to route electricity from the ignition coil to each spark plug at the correct time.
12-607: India Book House Pvt. Limited ( IBH ) is an importer, distributor and publisher of books and magazines in India . Formed in 1952, India Book House published paperback editions of children's authors such as Enid Blyton and Frederick Forsyth , as well as comics such as The Adventures of Tintin and Asterix , often in Indian languages as well. Their most famous series is the Amar Chitra Katha comics line that retells stories from
24-399: A cam on the distributor shaft that operates the contact breaker (also called points ). Opening the points causes a high induction voltage in the ignition coil. This design was superseded by an electronically controlled ignition coil with a sensor (usually Hall effect or optical) to control the timing of the ignition coil charging. In older distributors, adjusting the ignition timing
36-419: A rotating arm ('rotor') that is attached to the top of a rotating 'distributor shaft'. The rotor constantly receives high-voltage electricity from an ignition coil via brushes at the centre of the rotor. As the rotor spins, its tip passes close to (but does not touch) the output contacts for each cylinder . As the electrified tip passes each output contact, the high-voltage electricity is able to 'jump' across
48-567: Is headquartered in Mumbai . It has now been merged with the Oxford Bookstore and Stationery Company and is one of the largest book wholesalers in India. This article about an Indian company is a stub . You can help Misplaced Pages by expanding it . This article about a comics publishing company is a stub . You can help Misplaced Pages by expanding it . Distributor A distributor consists of
60-485: Is located directly above the spark plug for each cylinder. This design means that high-voltage electricity is only present in the small distance between each coil and the spark plug. See Saab Direct Ignition . The first mass-produced electric ignition was the Delco ignition system , which was introduced in the 1910 Cadillac Model 30 . In 1921, Arthur Atwater Kent Sr invented the competing Unisparker ignition system. By
72-410: Is required from the engine. Most distributors used on electronic fuel injection engines use electronics to adjust the ignition timing, instead of vacuum and centrifugal systems. This allows the ignition timing to be optimised based on factors other than engine speed and manifold vacuum. Since the early 2000s, many cars have used a 'coil-on-plug' direct ignition system, whereby a small ignition coil
84-479: Is usually achieved through both mechanical advance and vacuum advance . Mechanical advance adjusts the timing based on the engine speed (rpm), using a set of hinged weights attached to the distributor shaft. These weights cause the breaker points mounting plate to slightly rotate, thereby advancing the ignition timing. Vacuum advance typically uses manifold vacuum to adjust the ignition timing, for example to improve fuel economy and driveability when minimal power
96-559: The spark plugs , without the need for a distributor . It was later implemented with the Saab Trionic Engine Management Systems as one of the first ion sensing ignition system on a production car. The system puts a low voltage over the spark plugs when they are not fired to measure ionization in the cylinders. The ionic current measurement is used to replace the ordinary knock sensor and misfire measurement function. The spark plugs are directly coupled to
108-450: The 1980s and 1990s, distributors had been largely replaced by electronic ignition systems. Saab Direct Ignition Saab Direct Ignition is a capacitor discharge ignition developed by Saab Automobile , then known as Saab-Scania, and Mecel AB during the 1980s. It was first shown in 1985 and put into series production in the Saab 9000 in 1988. One of the first instances of using
120-463: The great Indian epics, mythology, history, folklore, and fables. In 2007, the imprint and all its titles were acquired by ACK Media Pvt. Limited which owns brands such as Amar Chitra Katha and Tinkle . The new entity IBH Books and Magazines Distributors Pvt. Ltd, is one of the leading publishers of illustrated volumes on Indian history and heritage, specializing in architecture, fine art, decorative art, film, environment, and lifestyle India Book House
132-426: The small gap. This burst of electricity then travels to the spark plug (via high tension leads ), where it ignites the air-fuel mixture in the combustion chamber. On most overhead valve engines , the distributor shaft is driven by a gear on the camshaft , often shared with the oil pump ; on most overhead camshaft engines , the distributor shaft is attached directly to a camshaft. Older distributor designs used
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#1732883412738144-399: The system was for a Formula Three racing engine (on B202 basis) developed with the help of engine builder John Nicholson , first shown in the spring of 1985. The system has been revised several times over the years. The ignition system together with the ignition coils form a single transformer oil filled cassette (or two cassettes in the case of a V6 engine) which is placed directly on
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