Question about exhaust on new Cat 420F

[06bowtie_guy]

My buddy just got a new 420F. Few changes but nothing really big it seems. More emissions stuff so batteries are moved and it has an inter-cooler now.

Anyways he was asking me what this part was on the exhaust. It's located just off the turbo as you can see in the pic. I think it might be an exhaust valve, like something a truck has for braking. Maybe use it to create back pressure during cold weather operation to warm up quicker??

Thanks for any input and sorry for the crappy cell quality.

 

[Lee-online]

It is an exhaust back pressure valve. It is used to restrict the exhaust to raise the temp to get it in a passive regen.

 

[06bowtie_guy]

Right on, thanks for the info!!
I was on the right track.

 

[bill onthehill]

Too much technology is ruining this country to keep some greenies happy!

 

[Lee-online]

It's amazing what the industry has had to do. These emission standards were implemented before the technology was invented to deal with it and the industry figured it out and met those standards. The EPA will now find another industry to go after, like the airlines or small engines.
What upsets me is the US, Canada and Europe have these very strict and costly standard while China, India and other countries don't.

 

[jimg984]

very true lee,,,,,,,, all in the same rotating world