http://196.220.128.81:8080/xmlui/handle/123456789/192 Tue, 21 Jul 2026 22:30:36 GMT 2026-07-21T22:30:36Z http://196.220.128.81:8080/xmlui/handle/123456789/5923 OPTIMUM DESIGN OF A FOUR-CYLINDER INTERNAL COMBUSTION ENGINE CRANKSHAFT DADA, AYODEJI SUNDAY The scarcity and need for efficiency in today’s competitive world have forced engineers to show greater interest in economical and better designs. This project is based on the analysis for optimum design of a four-cylinder internal combustion engine crankshaft. It considers the stressing, bending and torsional fatigue analyses using a high-duty cast iron BY 40-10, which can be worked into optimal shapes. For the optimization procedure, the design parameters are identified as the main journal diameter and length, crankpin diameter and length, web width, and thickness. The objective function is the volume of the material for the shaft. Using an appropriate optimization technique and computer aided method, the optimal shape is developed for the set operating conditions. The values of the optimum design parameters are: Crankpin diameter= 0.042m, main journal diameter= 0.036m, Crankpin length =0.029m, main journal length = 0.027m, web width= 0.060m, and web thickness = 0.012m. The project is useful in solving practical engineering problems in crankshaft design and it has the potential of being extended to other automotive components. It furnishes local fabricators and crankshaft refurbishing firms with useful information for improved crankshaft performance xiv, 106p. : ill. ; 30cm Sat, 01 Jan 2000 00:00:00 GMT http://196.220.128.81:8080/xmlui/handle/123456789/5923 2000-01-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5922 OPTIMIZING AUTO-REPAIR PRACTICE THROUGH MECHANIC VILLAGE AKURE METROPOLIS AS A CASE STUDY AKINYEMI, ADEMOLA ABIODUN This study investigates the problems facing automobile technicians with a view to optimising questionnaire auto repair work. The data for the study were collected using and interview techniques. One hundred and twenty (120) automobile technicians, forty-two (42) spare part dealers, and eighty (80) car owners were contained in the analyzed sample. The result of the analysis revealed the various problems facing automobile technicians' in Akure which include inadequate tools with 78% workshops interviewed not having adequate tools while 22% had fairly adequate tools and problems of low capital base with 75% Auto Technician interviewed having a working capital of less than N100,000 .00, 17% are operating between N101,000.00 - N250,000.00, while 8% between N251 ,000.00-N 1000,000.00 above. Also included are the problems of bad location with 70% of the respondents acquiring their land through rentage, 19% through lease while 3% through outright purchase and problem of poor educational background with only 6% having OND which represents the highest educational qualification of primary school, of all the respondents,8% had City and Guilds Certificate 19% primary school, 11% had school certificate while 56% are without any formal education (Apprentiship). Along with these problems is the lack of necessary social amenities ill separate workshops. Encouragement of the development of mechanic village which was observed from the data collected as one system that can help in solving most of the problems was formulated as an hypothesis, analysed and tested. The hypothesis testing reveals that the establishment of mechanic village to assist auto repair activities is preferred by the respondents. However, in view of the lion-professional ways that some areas that adopted this policy or developing Mechanic Villages in the past had handled it, this study went ahead and developed standardized models for executing the development of such villages so that optimum performance later could be obtained. The developed models were later validated and found to be reliable and dependable. Hence, the establishment standardised mechanic village of using the working models developed in the study was proposed and suggested as a way of solving the auto technicians problems thereby optimising auto repairs. xi, 67p. : ill. ; 30cm Fri, 01 Sep 2006 00:00:00 GMT http://196.220.128.81:8080/xmlui/handle/123456789/5922 2006-09-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5921 OPTIMIZATION OF ENERGY REQUIREMENTS IN COCOA BEANS PROCESSING PLANT IN NIGERIA: ILE-OLUJI COCOA PRODUCTS COMPANY AS A CASE STUDY AIKHOYE, IKHUOKHIO GODSON In this study, energy savings in a cocoa processing factory was found to be dependent on various factors which include monitoring and auditing of total energy usage and steam consumed. As a result, tests were carried out on the load centers such as the boiler, power generating house, process zone and offices where equipment for processing beans as well as air conditioners are put to use on a daily basis. Complete analysis of the results obtained from raw data over five years reveals that L.P.F.O is preferred to A.G.O at a boiler combustion efficiency of 74.49%. Savings amounting to N 112,334.50 per annum could also be realizable. On steam distribution, the company would loose as much as 325W/m if its steam supply lines are insulated with 15mm thick materials as against the present 25mm thick, 50W/m of energy would be conserved using an insulating material of 50mm thickness. A proposal of using 40 sodium lamps in place of 586 fluorescent tubes would increase illuminance in the factory by 22 % with a realisable cash savings of N 308,9971.80 per annum. xiv, 99p. : ill. ; 30cm Wed, 01 Dec 1999 00:00:00 GMT http://196.220.128.81:8080/xmlui/handle/123456789/5921 1999-12-01T00:00:00Z http://196.220.128.81:8080/xmlui/handle/123456789/5920 MODELLING OUTPUT AND DEMAND CHANGES IN MANUFACTURING INDUSTRIES WITH TECHNOLOGY AND INFORMATION CONSTRAINTS ODION, Edmund Osayande The importance of information and modem technology to an organization cannot be over emphasized. This work is aimed at developing a model that can be useful in ascertaining when output will meet demand at any particular technology and information/awareness level, which is found missing in many organizational operations. The parameters of the model: manpower, machines, infrastructural facilities and raw materials were used together with information and machine technology available during the process of determining the expected output that will meet forecasted demand. The model developed was tested with data from two production companies. It was discovered that at low technology and information levels the outputs were low. Demand could not be satisfied. This results in importation to satisfy demand which has a negative effect on the economy. At high technology and information levels, demand is met with leftovers which results in some inventory cost. An optimal point was obtained in which output equals demand for a particular level of technology and information. The optimality points were further analyzed using SPSS 15.0, from which a linear multiple regression model relating output and demand to information and technology acquisition probabilities and the year under schedule was developed. This gave a concise model that was used to develop a computer programme in Visual Basic 6.0 software that predicted for the organizations the optimal production strategy. The model was tested and found to be very reliable for any organization that aim at getting the best output from the available resources. xiii, 98p. : ill. ; 30cm Sun, 01 Aug 2010 00:00:00 GMT http://196.220.128.81:8080/xmlui/handle/123456789/5920 2010-08-01T00:00:00Z