Download Engine Testing: Theory and Practice by Michael James Plint, Tony Martyr PDF
By Michael James Plint, Tony Martyr
This ebook brings jointly the big and scattered physique of data at the idea and perform of engine checking out, to which any engineer chargeable for paintings of this type should have entry. Engine checking out is a primary a part of improvement of latest engine and powertrain platforms, in addition to of the amendment of latest platforms. It varieties an important a part of the sensible paintings of many automobile and mechanical engineers, within the car production businesses, their providers providers, professional engineering companies corporations, the motor recreation area, hybrid autos and tuning quarter. The eclectic nature of engine, powertrain, chassis and entire car trying out makes this entire e-book a real must-have reference for these within the automobile in addition to extra complicated scholars of automobile engineering.
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The documentation, representing the ‘as-commissioned’ state of the facility, must be of a high standard and easily accessible to maintenance staff and contractors. The form and due delivery of documentation should be specified within the functional specification and form part of the acceptance criteria. Subsequent responsibility for keeping records and schematics up to date within the operator’s organization must be clearly defined and controlled. Summary Like all complex industrial projects, the creation, or significant modification, of an engine test laboratory should start with the creation of an operational specification involving all those departments and individuals having a legitimate interest.
2 Example of the 30–30–30–10 rule In via Out via Fuel 300 kW Dynamometer 30% (90 + kW) Exhaust system 30% (90 kW) Engine fluids 30% (90 kW) Convection and radiation 10% (30 kW) under-rate cell cooling systems. Like any rule of thumb this is crude but does provide a starting point for the calculation of a full energy balance and a datum from which we can evaluate significant differences in balance caused by the engine itself and its mounting within the cell. Firstly, there are differences inherent in the engine design.
9% Power output 150 kW Instrumentation 4 kW Total process water heat load 158 kW Total heat load into cell (inc. 3 Diversity factor of thermal rating of facility services, plotted against number of test cells, based on empirical data from typical automotive test facilities In calculating, or more correctly estimating, the diversity factor it is essential that the creators of the operational and functional specifications use realistic values of actual engine powers, rather than extrapolations based on possible future developments.