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Published:
Jun 30, 2006Keywords:
Article Details
Tanzania Journal of Engineering and Technology (Tanz. J. Engrg. Technol.) publications are written as a basis for academic discussions. Whereas effort is made by the Editorial Board to screen out inaccurate or misleading statements, data or opinions, Tanz. J. Engrg. Technol. wishes to make it clear that the contents of the articles are the sole responsibility of the authors. Accordingly, the Editorial Board and editors, publisher, College of Engineering and Technology and the University of Dar es Salaam accept no responsibility or liability whatsoever for the opinions, inaccurate or misleading data or statement and views expressed by the authors.
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Main Article Content
Investigation of the Stability of Engine – Governor System Operated At Low Speeds
Abstract
During diesel engine operation, a tendency for the engine not to achieve a steady idling speed has often been observed. During idling speed the engine tends to either race or stall as a result of poor and incorrect metering of the fuel, which is required for the combustion process and if severe, the engine will stop firing completely. 111 this research an investigation was made to establish knowledge on diesel engine stability operated at low speeds. The influence of a governor of an engine in the control of the engine speeds has also been investigated. In order to obtain information on the engine operation condition, use has been made of a mathematical model that incorporates the engine, governor and a tachometer. A simulation was conducted by solving the system's differential equations using a fourth order Runge-Kutta numerical integration method written in C code computer programs. The results obtained show the stability of the engine-governor system operated at low speed to be stable. When the engine was subjected to some parameter variations the engine showed some sign of instability occurring at increased disturbance intensities. Based on the obtained results an enhanced knowledge has been obtained giving an indication on how the existing mechanical engine speed governors design features could be improved to achieve engine stability at low speeds.
