The camless engine

Tuesday, August 20, 2013
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As used in automotive applications the internal combustion engine is woefully inefficient. Many gasoline race engines can claim up to 35% thermal efficiency at specific speeds and loads, but a figure of 25% – even as low as 20% overall – ... read more
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Back to basics

Thursday, July 04, 2013
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I would guess that very few of those who handle cams – in that they either buy them or install them, or have some form of interaction with them in any way – have ever thought about the actual profile of the cam and the way it is generated... read more
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Hollow camshafts

Thursday, May 16, 2013
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Isn’t it always the case that when you think you have designed the best cam profile ever – at least in your opinion – somebody always wants it smaller, lighter and/or even cheaper to manufacture? Is it little wonder then that when e... read more
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It’s all about timing

Friday, April 05, 2013
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Much has already been written in these columns about the technicalities of cam design and manufacture. But unless the component is properly installed in the engine so that the intake and exhaust valves are accurately phased to the motion of the pisto... read more
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Smooth operator

Thursday, February 21, 2013
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In a recent poll of Britain’s sexiest fictional characters, despite it being dominated almost exclusively by men, the top slot was, unsurprisingly, James Bond. The creation of author Ian Fleming, Bond could handle multiple, often complex situat... read more
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Friction

Thursday, January 03, 2013
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Friction is the enemy of horsepower. It’s a simple enough mantra, but in order to reduce it in the internal combustion engine a full understanding of the tribology at each mating surface is essential. The friction in the ring pack and cylinder ... read more
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Talk to turn

Thursday, November 08, 2012
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The most glamorous part of any engine development programme is that of establishing the wide-open throttle engine performance. Producing the maximum bmep (brake mean effective pressure) over the usable range of engine speeds, the torque curve can be ... read more
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That other camshaft

Thursday, September 27, 2012
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It is perhaps easy to forget that while in most gasoline engines the function of the camshaft is solely to open and close the intake and exhaust valves, in others - particularly the more modern direct injection designs - cams are part of the fuel sys... read more
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Peace and harmony

Monday, August 13, 2012
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I suppose you could say that the valvetrain in any engine is a bit like my grown-up family. So long as everyone away from home stays in contact with the matriarch, all is well. However, as soon as that contact is lost - a late birthday card, for inst... read more
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Asymmetrical profiles

Tuesday, July 03, 2012
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"What goes up must come down." I'm sure we've all heard that at some time, and a true enough statement most of the time (but not as it seems to gasoline prices at the pump). But what has this to do with cam design, I hear you ask? Well, if you substi... read more
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