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Steel monotherm diesel race piston

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The piston lives at the interface of two hostile environments. One dominated by extreme temperature and pressure, and the other by inertia, kinetic energy and friction.Piston development is an unceasing challenge for the powertrain engineer and the tools of his trade are to be found in many diverse areas, spanning a whole gamut of bespoke materials, advanced tribological solutions, surface topography, treatments and finishes through to the ingenious oil cooling solutions found in modern...

Piston ring trends

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The piston rings in an engine serve to act as a seal to prevent the escape of fresh inlet charge and combustion products into the crankcase, and also to prevent an excess of crankcase oil from reaching the combustion chamber. As such they are an important component to consider in engine design. Poorly performing rings can lead to poor engine performance and increased oil consumption.The general trend in piston ring design is towards lighter weight components and fewer of them. In...

Next generation passivation treatments

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Non-electrolytic passivation (often referred to as conversion coating) is one of the most common treatments for aluminum surfaces that need to be made corrosion resistant, while still remaining conductive electrically. Because of its ease of processing, it is one of the lowest cost anticorrosion preparations available.Chromate conversions (‘Iridite’ and ‘Alodine’) have been the traditional passivation application for aluminum alloys, both wrought and cast. The...

Dynamometer Testing Facility

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RET was recently invited to Jaguar Land Rover’s PCC – Product Compliance Centre – at their Solihull plant to witness the CO2 emissions testing of the 2009 BTCC race cars. Whilst there we had the opportunity to see what goes into a truly world-class vehicle testing facility.The PCC consists of two, four-wheel drive rolling road dynamometers, Cell 1 and Cell 2. Hatton Systems Ltd are responsible for the dynamometer equipment and control systems and Horiba for the gas...

Back Torque Limiters

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Back Torque Limiters - what are they and why would you possibly need one?More commonly known as slipper clutches the back torque limiter has been one of the major growth businesses in motorcycling during the last few years.Its all about grip and smoothness. Motorcycles have tiny tyre contact patches compared to cars and the racers that can manage that contact patch and maximise the grip available will be the winners.. A back torque limiter is a clutch that deliberately slips in a smooth...