Automotive News, Media & Press - patents hint at C7; variable lift, dct

I'm at work, I cant link it. Google ("GM global technology" patent) The first link, faq.org, lists their submissions by date.

http://www.faqs.org/patents/assignee/gm-global-technology-operations-inc/

I highly doubt that will be in the v8 its a dohc system from what I gather, I doubt Gm would ever have a quad cam v8

I highly doubt that will be in the v8 its a dohc system from what I gather, I doubt Gm would ever have a quad cam v8

If that's the case, then I agree. Some time back, there was talk of a dual in-block cam. I can't picture a traditional dohc with lobes that are coupled to give a sum phase to each valve.

They have design sketches of it on that link, at first I was thinking a dual in block cam system, then I seen the pics and read the description of the patent

Scratch that... This looks way more advanced than a traditional dohc in the other pics I couldn't see yet. The top of the valve stem has a bar with rollers and the cams take turns pushing it (from what I gather)

^ sounds impossible to work on. And expensive. Don't do it GM :(

Sounds like BMW valvetronic. Ho-Hum... welcome to 2002

"increased Fuel Economy Mode Control Systems and Methods" 2/12/12
"The FE mode module selectively triggers operaon in the one of the cylinder deactivation mode and the low-lift mode."
key words, cyl deactivation and low lift modes; unless GM's working on a DOD 6 cylinder.