Design And Development Of A Control System Based On Engine Speed

Chan , Chow Khuen (2008) Design And Development Of A Control System Based On Engine Speed. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Speed sensing application has been known in the automotive industry as mostly all the machines require speed sensing system to control the speed in order to obtain a desirable output. In fact, the speed sensing has been use in many applications such as camshaft and crankshaft, tachometer, anti-skid I traction control, sprocket, transmission of the rpm, conveyer speed, stop motion detection and counters. In accordance to the topic, there are basically four areas that should be covered which consists of engine speed detection; proving when the rpm increases, the output signal also increases; conversion of the signal to voltage and lastly determination of the system that is going to be controlled. First and foremost, the detection and obtainable signal should be performed whereby in this experimental project, the infrared sensor (which is consists of emitter and receiver) is used to detect the signal from the engine. A 6V DC motor is attached to the connection from the engine to the bulb of the motorcycle Honda C70. The DC motor that is attached with a fan is used to produce signal to the sensor. It is seen that when the motorcycle is being rammed gradually, the output signal increases gradually. This can be checked by detecting the rpm fan of the 6V DC motor. Basically, there are two circuits whereby the first circuit is the sensing circuit for the infrared sensor. The second circuit is for converting the frequency or pulses that have been detected by the infrared sensor which consists of complex circuit that contains the IC TC9400. The IC TC9400, in this experiment project, acts as a frequency-to-voltage converter. It will act as integrator and transform the signal to voltage. Last but not least, this is proven when the 3 V DC motor (the type of system that is going to be controlled) is lighted up and rotates gradually as the engine of the motor increases in rpm.

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