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The ECM is a type of electronic control unit (ECU), which is an embedded system that employs software to determine the required throttle position by calculations from data measured by other sensors, including the accelerator pedal position sensors, engine speed sensor, vehicle speed sensor, and cruise control switches.
A throttle position sensor (TPS) is a sensor used to monitor the throttle body valve position for the ECU of an engine. The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle. More advanced forms of the sensor are also used. For example, an extra "closed throttle position ...
Absolute throttle position B 0 100 % 48: 72: 1 Absolute throttle position C 49: 73: 1 Accelerator pedal position D 4A: 74: 1 Accelerator pedal position E 4B: 75: 1 Accelerator pedal position F 4C: 76: 1 Commanded throttle actuator 4D: 77: 2 Time run with MIL on 0 65,535 min + 4E: 78: 2
Throttle body actuator (604) Contains throttle position sensor and throttle motor with associated reduction gear. The throttle body is spherical to improve the throttle area control with low loads. No mechanical limp-home function as with T7. Accelerator position sensor (379) Integrated in accelerator pedal bracket.
In 1981, a Delco Electronics ECU was used by several Chevrolet and Buick engines to control their fuel system (a closed-loop carburetor) and ignition system. [10] By 1988, Delco Electronics was the leading producer of engine management systems, producing over 28,000 ECUs per day.
Electronic throttle control, throttle position sensor fault or cruise control failure (see drive by wire) [11] Stuck throttle (unrelated to pedal position) [12] [13] Shorting of tin whiskers [14] [15] Diesel engine runaway: Diesel engine power is governed by the amount of fuel supplied. Excessive pressure in the crankcase can force mist of ...
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