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MSD Ignition was the first company in the world to experiment with Multiple Spark Discharge for the ignition system of internal combustion engines in 1970. The idea was first proposed by a group of engineers working on the White Sands Missile Range in southern New Mexico.
These limiters may also retard the ignition timing. If using a soft-cut rev limiter, the engine will start to cut fuel or retard ignition timing before the set RPM until it slowly reaches it and remains there. If the engine over-revs anyway, a soft-cut limiter may progressively shut off each cylinder one by one until engine RPMs drop to safe ...
The EEC I and EEC II modules used a common processor and memory so they can be described together. The microprocessor was a 12-bit central processing unit manufactured by Toshiba, the TLCS-12, which began development in 1971 and was completed in 1973. It was a 32 mm² chip with about 2,800 silicon gates, manufactured on a 6 μm process.
The ignition system of an internal combustion engines depends on the type of engine and the fuel used. Petrol engines are typically ignited by a precisely timed spark, and diesel engines by compression heating. Historically, outside flame and hot-tube systems were used, see hot bulb engine.
The Duraspark II is a Ford electronic ignition system. Ford Motor Company began using electronic ignitions in 1973 with the Duraspark electronic ignition system and introduced the Duraspark II system in 1976. The biggest change, apart from the control box redesign, was the large distributor cap to handle the increased spark energy.
Rev-limiter and implementation [ edit ] Most modern cars have computer systems that prevent the engine from straying too far into the redline by cutting fuel flow through the fuel injectors / fuel rail (in a direct-injected engine) / carburetor or by disabling the ignition system until the engine drops to a safer operating speed.
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