Valve seat materials

Thursday, December 16, 2010
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In a four-stroke race engine, the valve seats play an important part in the mechanical reliability and heat management of the valves. In general, the valve seat will conduct much of the heat away from the valve head during the time the valve is shut.... read more

Con rod bearings, not leaded please

Thursday, December 16, 2010
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In earlier RET-Monitor articles I have written about the application and challenges of lead-free bearings. Until now the focus has been on the main bearing shells, mainly linked to the crankcase main bearing bore shape and split line quality. In this... read more
Tags :  bearings

The domed tappet

Thursday, December 16, 2010
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For anyone starting out on a clean-sheet engine design it is always worth remembering the notice at the entrance to the Sahara desert. The notice, or so I am reliably informed, says something like, "Choose your rut very carefully…. you will be... read more
Tags :  camshafts

Silver plating of fasteners

Thursday, December 16, 2010
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The matter of selecting the correct material for fasteners is an important one. The design engineer or engine development specialist has to be sure that the material is strong enough to resist the applied loads and have the fatigue resistance to cont... read more
Tags :  coatings

Location of con rod caps, part 2

Thursday, December 16, 2010
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In the previous article on the subject of maintaining the accurate locations of the two parts of a split con rod design, we looked at dowel pins and ring dowels, and the relative merits of the two methods. The subject of joint shear stiffness was ra... read more
Tags :  con-rods

The gear change

Thursday, December 16, 2010
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Like millions of other followers of Formula One, I look forward each year to sitting in front of the TV and watching both practice and race of every single Grand Prix throughout the season. Also like many others, I have done this for probably the bes... read more
Tags :  electronics

Valve seats, cool

Thursday, December 16, 2010
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This is a follow-up to my earlier articles on cylinder head loading. Earlier, I described what is known as one of the most critical failure modes, Thermo Mechanical Fatigue, or TMF. In those articles the three main load cases were mentioned - assembl... read more
Tags :  engine-structure

Hypereutectic liners

Thursday, December 16, 2010
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It is surprising how often people get mixed up between the prefixes 'hypo' and 'hyper'. While 'hypo' refers to a situation that is less than normal, 'hyper' relates to exactly the opposite. As an example of such confusion I have a neighbour who speak... read more
Tags :  engine-structure
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