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Cat ceramic has ultra-thin walls
Corning has developed a ceramic substrate for catalytic converters with ultra thin walls that it says will increase engine power and reduce fuel consumption by lowering exhaust system back pressure. |
01/01/2008
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PA46 targets underbonnet applications
A high performance grade of PA46 has been formulated especially for under-the-bonnet applications. Stanyl Diablo OCD2100 is said to extend the functional life of components well beyond the limits of other high temperature polyamides. |
01/11/2007
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Polyamide water hoses now more flexible
Polyamide 12 multilayer tubing systems (MLTs) for coolant lines are now even more flexible, thanks to a modification carried out at the molecular level by scientists at Degussa. No plasticiser has been added. |
01/10/2007
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Laser remelting strengthens pistons
Diesel engine design has taken a further step forward with a new generation of aluminium-based piston materials combined with a laser technology for configuring the piston bowl lip, accoring to Kolbenschmidt Pierburg. |
01/10/2007
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Roller bearings shave fuel consumption
Small contributions to fuel savings are becoming increasingly attractive to OEMs as they endeavour to keep Europe’s environmental lobby happy, writes Roger Bishop. |
01/10/2007
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Show and tell
Europe’s biggest car show takes place in Frankfurt from 13 to 23 September. We look beyond the gloss of the show cars and concepts to preview some of the technologies that will be on display |
01/09/2007
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EGR valve has novel drive
A new design of diesel EGR valve has a motor actuator combined with a drive system, said to be unique, that provides fast response, resistance to exhaust contaminations and packaging flexibility all within a smaller envelope. |
01/09/2007
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Gas injection used on PA66 water pipes
Cooling-water pipes are exposed to high temperatures and aggressive environment. At the same time they have to provide long-term leak resistance despite internal pressures of almost 2 bar. Consequently they have been traditionally manufactured from metal. |
01/09/2007
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Small diesel on target for Euro 5
Magneti Marelli’s exhaust systems’ business line has been committed to supplying Euro 5 emissions treatment systems for Fiat’s 1.3 small diesel engine. |
01/09/2007
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Fuel feed module integrates pressure regulator
The latest version of the Vista fuel feed module, now being factory fitted to the BMW Mini, has taken a further step down the integration path. As well as the fuel pump, filter, and gauge, it now features as standard a pressure regulator. |
01/09/2007
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Teflon inner hose counters RME
The trend towards alternative fuels is challenging automotive fuel-line designers. Some diesel fuels already have a 5% rape seed methyl ester (RME) content that is more aggressive than mineral diesel and known to attack plastic fuel lines. |
01/04/2007
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Spark plug advances match combustion developments
It is easy to forget that how advanced combustion processes are affecting downstream suppliers of engine components and systems, writes Roger Bishop.
Valve drives based on cam phasers or valve lift control as well as direct injection systems with wall or air guided combustion are now state of the art. And the latest generation of piezo-controlled injectors is extending the range of unchoked, lean engine operation.
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01/04/2007
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BMW’s CSF is light, fast and cheaper
The exhaust treatment system for the new BMW X5 3.0d combines a metallic catalytic converter and silicon carbide diesel particulate filter within a single housing and is a standard fit, writes Roger Bishop. |
01/04/2007
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Combined technologies improve turbulent flow
Improving the turbulent flow of gases through a catalytic converter is the key to ensuring that as much of the volume of the system as possible is used, writes Roger Bishop |
01/04/2007
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Common purpose
Roger Bishop investigates the research and development directions being taken by two leaders in exhaust gas treatments and finds they have much in common |
01/03/2007
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Regulator accuracy achieves ±1%
Third generation Bosch current regulators are said to have twice as much control accuracy as their predecessors. The first of this generation is the CG208, a fully integrated dual channel current regulator which maintains output current reference value at ±1%, even under full load. |
01/03/2007
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Control valve is key to twin turbo
The parallel sequential dual-stage turbocharger developed by Honeywell for the new Peugeot 407, 607 and Citroën C5 and C6 diesel engines has at its heart a patented progressive control valve, writes Roger Bishop. |
01/03/2007
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Head-integrated exhaust manifold proves its point
An advanced cylinder head with integrated exhaust manifold (IEM) has been revealed by UK car technology group Lotus Engineering, writes Roger Bishop. Designed for a three-cylinder engine, this latest IEM concept from the company is aimed at reducing emissions, weight and manufacturing costs on gasoline engines.
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01/03/2007
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Sound moves
The sound a vehicle makes is one of the key features of the impression it makes, and exhaust systems are a major factor in this respect. Ian Adcock looks at how engineers are tuning their systems to generate a distinctive noise |
01/02/2007
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Composite seal meets fuel vapour targets
Fuel sender seals are one of the largest emission leak paths in automotive gasoline fuel systems and therefore a big focus of attention for design engineers, writes Roger Bishop. |
01/02/2007
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Extrusion elastomers provide thin fuel barriers
The ultimate function of any fuel system is to manage the delivery of precisely metered quantities of fuel from the tank to the engine combustion chamber. Critical to achieving these objectives are the integrity and durability of the elastomeric sealing devices like O-rings, seals, tubing and hose that connect the fuel system components. |
01/10/2006
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Piezo glow plug sensor reduces NOx
Siemens VDO and Federal-Mogul have jointly developed a glow plug with an integrated pressure sensor (GPPS) as a simple in-cylinder solution to reducing NOx and particulate emissions. |
01/10/2006
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Cooling circuit lowers DC water pump costs
When an Australian automotive electric water pump manufacturer redesigned its 80 litre/min model to deliver 110 litre/min, the increased diameter and size of DC motor and air-cooling strategy increased its cost to A$45, writes Roger Bishop. |
01/10/2006
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