Failure Modes And Effects Analysis

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For a business to succeed, the product that is being developed for the commercial or public market has to conform to a number of expectations and standards. For example a product needs to be cost effective but also must sufficiently meet the customers’ expectations and requirements. In the automotive industry one of the factors of paramount importance is the need to be reliable. Risk management is emerging as a crucial step for companies to take to analyse the risk associated with a product and to implement strategies to reduce these risks from affecting the product in its lifespan. Risk management techniques aid in the robustness of manufactured products and can minimise the costs and maintainability. 1.1 Risk Management Risk Management is an increasingly important practice for use in industry and can now be found in the majority of companies. Risk assessment is the processes used to identify, analyse and evaluate risk in a logical and systematic method [1]. The process of using analysis techniques has become so important within a company to improve the quality and safety of products and processes that they now form part of many standards that many companies abide by. In today’s environment, being certified against a set of recognised standards can be invaluable to a company’s success. Failure Modes and Effects Analysis (FMEA) can be applied to various stages of manufacturing and engineering. From the Concept stage to the Design stage and eventually entire systems. The technique is very adaptable and offers similar results when applied to a component, process or entire system. FMEA is not the only method that can be used to evaluate a system. There are a range of different analysis methods to break down the focus. In this proj... ... middle of paper ... ... the combustion chamber in such a way as to maximise the efficiency of combustion. There are 3 main types of injection systems [13]: • Indirect Injection – Fuel delivered into a chamber outside the combustion chamber. • Direct Injection – Fuel delivered directly into combustion chamber. o Common Rail – Pipe situated above the cylinder head continuously filled with pressurised fuel. Injected simply have to release this high pressure fuel into the combustion chamber. o Unit Injectors – Each injector pressurises its own fuel via an extra cam on the camshaft. These can also be electronically controlled as per the injectors on the Delphi website. The most common and advanced injectors on the market at present tend to be unit injectors as these offer the best atomisation and efficiently. However, the most common injection system used is the DI Common rail diesel system.

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