QNX and Freescale talk future of in-car infotainment

Paul Leroux

QNX and Freescale enjoy one of the longest technology partnerships in the field of automotive infotainment. The roots of their relationship reach back to 1999, when QNX became a founding member of MobileGT, an industry alliance formed by Motorola (Freescale's parent company) to drive the development of infotainment systems.

If you've read any of my blog posts on the QNX concept car (see here, here, and here), you've seen an example of how mixing QNX and Freescale technologies can yield some very cool results.

So it's no surprise that when Jennifer Hesse of Embedded Computing Design wanted to publish an article on the challenges of in-car infotainment, she approached both companies. The resulting interview, which features Andy Gryc of QNX and Paul Sykes of Freescale, runs the gamut — from mobile-device integration and multicore processors to graphical user interfaces and upgradeable architectures. You can read it here.
 

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Valve Failure

Three types of valve failure have been observed:

-valve recession;

-guttering;

-torching.

Valve recession, the most common form of wear in diesel engine inlet valves, is caused by loss of material from the seat insert and/or the valve. Guttering is a hightemperature, corrosive process usually caused by deposit flaking. Torching or melting of a valve is triggered by a rapid rise in the temperature of the valve head, which may be caused by preignition or abnormal combustion.

Inlet valve wear is a particular problem in diesel engines because the fuel is introduced directly into the cylinder. The inlet valve, therefore, receives no liquid on its seating face and seats under rather dry conditions.

Exhaust valve wear is less prominent than inlet valve wear as combustion products deposited on the seating faces provide lubrication. Exhaust valves are more likely to fail due to guttering or torching. Such failures are rarely seen in inlet valves.

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E N G I N E E R I N G R E S E A R C H S E R I E S

Automotive Engine Valve Recession

R Lewis and R S Dwyer-Joyce

Series Editor

Duncan Dowson

Professional Engineering Publishing Limited,

London and Bury St Edmunds, UK

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www.solidworksimpletutorial.blogspot.com

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