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Support for catalytic converter

Support for catalytic converter

Support for catalytic converter

(OP)
Hello folks! This is my first posting in EngTips.

I am in the automotive industry, and I have been tasked to design a catalytic converter mounted near the engine. I post in the piping forum because I feel the problem is somewhat related to what you guys are doing.

Consider the BMW V10 engine in this link: http://www.bmw-m5.info/images/2005-BMW-M5-Engine-Flywhee.jpg

Notice the catalytic converters after the manifolds. They are supported by brackets to keep vibration stresses at an acceptable level. When designing a similar bracket in my application, I have three challenges:

1. Making sure the bracket fits due to tolerance buildup
2. Make it stiff enough to keep stresses down, and
3. To allow for thermal expansion.

I can solve the first two, but the thermal expansion seems tricky after some hand calculations. BMW must have solved this, but I can't really see how. Could the part with two screws between the bracket and the cat work as some sort of hinge? Or does the cat "slip" in its band clamp?

/regards Tancred

RE: Support for catalytic converter

hello Tancred,

Welcome to Eng Tips!

Since it has been a week and you haven't got any responses, may I suggest that you repost this in one of the automotive forums.  I don't regularly post there, but forum78: Transmission, Driveline, Hybrid Drive engineering seems like it might be more what you need.  If not that one, then forum108: Automotive Engineering other topics.

Patricia Lougheed

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