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Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, gas turbine-powered aircraft, and some cars.
Articles relating to ignition systems, which generate a spark or heat an electrode to a high temperature to ignite a fuel-air mixture. Subcategories This category has only the following subcategory.
An alternative system used in automobiles is capacitor discharge ignition, primarily found now as aftermarket upgrade systems. [3] Electronic ignition was a common term for Kettering inductive ignition with the points (mechanical switch) replaced with an electronic switch such as a transistor. [4]
When a manual starter system is used (such as a recoil starter with a pull-cord), only a basic electrical system is required, since the system's only purpose is to power the spark plug. Older engines used a magneto to achieve this, while newer engines often use a capacitor discharge ignition (CDI) system with an ignition coil. [9]
Starting a Lazair II ultralight aircraft's JPX PUL 425 engine, equipped with a recoil starter. A rope start device housed in a Nose bullet of a Junkers Jumo 004 turbojet.. Rope start (also called ripcord [citation needed], pull start [citation needed], or rewind start [citation needed]) is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers ...
The problem with this type of ignition is that as RPM increases the availability of electrical energy decreases. This is especially a problem, since the amount of energy needed to ignite a more dense fuel mixture is higher. The result was often a high RPM misfire. Capacitor discharge ignition was developed. It produces a rising voltage that is ...
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.
A predecessor system called "Unitized Ignition" was optional on 1972 and 1973 Pontiacs. [citation needed] Most—but not all—HEI systems have the ignition coil mounted in the distributor cap. A control module and magnetic pickup are mounted in the distributor, in place of a conventional ignition system's breaker points and condenser.