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Modelling and analysing production lines are crucial for the research community and designers interested in increasing production utilisation and reducing costs. This paper aims to model and analyse a real production process of a Jordanian vehicles manufacturing company and improve production line resource utilisation using ARENA simulation software. The methodology used is simulation modelling to develop a new production line design. Performance measures are obtained from data given by the company management and direct observation of the production line. A suggested modified Arena simulation model is developed for the production line processes based on the collected data. Verification and validation analysis of the proposed model is done. Results show that the proposed model’s performance is better than the current one in terms of; overall total processing time, the overall waiting time, the overall work in process, and the overall utilisation.

In rotating cylinder-piston system, the largest losses source is frictional losses, accounting for 50% of the total frictional losses, thus it is important to optimize. Effect of incremental rotation of a cylinder liner on its wear rate was investigated. The engine speed, load and the cylinder rotating angle were the main parameter. The results showed that the wear rate may be reduced to the half simply by rotating cylinder liner every six hours’ time interval of working. The test was carried out in pairs using a piston cylinder with movable liner and compared to a standard cylinder liner (fixed liner). Angles of 60 o , 120 o , 180 o , 240 o , and 300 o were used for incremental movement. The same operating conditions for two cylinders were maintained for the purpose of comparison. Beneficial effects of reducing the wear rate for all components of the piston-cylinder arrangement associated with incremental rotational movement of a cylinder linear were noticed. A decrease in wear rate was obvious in the cylinder liner in rotation angles of 120 o and 240 o and it is almost one-fourth of the wear that occurs in the stationary cylinder liner.

Oxyhydrogen gas (Brown gas (HHO)) can be an innovative venue for cleaner energy in auto industry.The effect of Potassium hydroxide(KOH) concentration in electrolyte solution of HHO fuel cell on GK200 Honda single cylinder engine performance parameters and emissions has been investigated.1L/min Blend of HHO is fed to the engine as a secondary fuel and a constant electrical load and variable engine speeds (1300–2300) test were carried out to quantify the foremost concentration of KOH in the fuel cell electrolyte that has a constructive impact on both engine performance parameters and emissions. Several concentrations of KOH were considered namely (1g/l, 1.5 g/l, 2g/l, 5g/l, and 6.5g/l). Results reveal that all KOH concentrations considered have a positive impact on engine performance parameters and the best concentration range for KOH in distilled water is within the range 1g/l - 2g/l the average percentage enhancement in engine break power was 22.3% and 20.5% reduction in specific fuel consumption whereas the average reduction in CO and CO2 emissions were almost 80% and 50% reduction in NOx and HC emissions. Most of literature concerned with HHO as a fuel blend set 5g/l KOH concentration for fuel cell electrolyte whereas the results of this research reveals that lower concentrations within the range of 1g/l - 2g/l reduces the energy consumed by the fuel cell in addition to higher impact on the engine performance parameters and enhances the overall system efficiency.