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Custom Mechanics Essays

Example Essays

Mechanics Custom Essays: Stiffness Car Chassis

The purpose of the project is to increase the stiffness and reduce the weight of the existing car chassis, without disturbing the shape, provided for engine mountings and driver's space and other constraints provided by the existing chassis model. Why is it so important to increase the stiffness and reduce the weight of the chassis? In general to define chassis in this way, first a clear meaning of structure should be known.

In general perspective a structure can be defined as a specific arrangement of material to resist loads. This structure should also enable to the location of the components such as engine mountings, transmission, fuel tank, suspension system etc. So it must resist loads without breaking, and without more deflection.

If the chassis cannot resist loads it leads to a serious handling problems, and will not support the engine and transmission system, also the chassis should be light enough to maintain weight to power ratio and better handling in corners. The principle loads that includes on the chassis are, by the engine, the aerodynamics, brakes, road irregularities, the inertia loads due to masses under accelerations and vibrations.

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Mechanics Custom Essays: Turbocharger Petrol Engine

The quest for higher efficiency of the internal combustion engine will always be pursued. Increasingly stringent emission regulations are forcing the manufacturers to downsize on engine displacement and increase the specific power. By adding the turbocharger, the airflow through the engine and hence specific power can be increased.

The advantage of small turbocharged engine over a naturally aspirated (NA)engine of a similar power is that it is lighter, having better part load efficiency when operating at the same load, while producing the less emission. The objective in this study is to investigate a turbocharger in a naturally aspirated engine and testing the engine before installation of the turbocharger. Boost refers to the increase in the manifold pressure that is generated by turbocharger in the intake path or specifically that exceeds the normal atmospheric pressure.

This study also aimed at to develop a strategy for control of boost for the engine. Turbocharged spark ignition engines have been around since the 1970s, but their popularity outside the motorsport sector has been small until the recent advances in engine control. The lack of popularity could partly be due to the drivability issues associated with early turbocharged engine. The engine's response to a sudden increase in driver's demand was delayed due to turbocharger lag.

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