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A rev limiter is a device fitted in modern vehicles that have internal combustion engines. They are intended to protect an engine by restricting its maximum rotational speed, measured in revolutions per minute (RPM). Rev limiters are pre-set by the engine manufacturer. There are also aftermarket units where a separate controller is installed ...
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.
Artist rendering of a NASCAR restrictor plate. A restrictor plate or air restrictor is a device installed at the intake of an engine to limit its power. This kind of system is occasionally used in road vehicles (e.g., motorcycles) for insurance purposes, but mainly in automobile racing, to limit top speed to provide equal level of competition, and to lower costs; insurance purposes have also ...
A two-step rev limiter is a module that regulates the engines rpms for a controlled launch and optimal power settings. Two step limiting confines rpms at two separate points. The first point is programmed to limit the revolutions to a desirable launch range and the second point is limited to protect the engine from over revving.
[1] [2] In instances where the top speed has been determined by removing the limiter, the test met these requirements, and the car is sold with the limiter on then the limited speed is accepted as meeting this requirement. For the McLaren F1 the estimation by Car and Driver about the speed at the rev-limiter is used.
The limiter may be considered as setting the maximum speed (with throttle kickdown to override it) easing the throttle to reduce speed, whereas cruise control sets the minimum speed (with the brake pedal to override it) pressing on the throttle to increase speed. The limiter may shift down through automatic gears to hold the maximum speed.
The Rev. James Ruggieri, bishop of the Roman Catholic Diocese of Portland, said in a statement after the ruling that the diocese would continue to dedicate resources to examine claims of abuse ...
(December 2013) (Learn how and when to remove this message) The 2.0 L (1,996 cc/121.8 cid) version of the engine was the first offered. Production began in 1994 in Trenton, MI , and it was used in many Chrysler Corporation vehicles.