NYT article - GM cylinder dropping
Len Sabatine
sabatine at epix.net
Wed May 30 22:45:03 GMT 2001
Interesting mention of the 4-6-8 . The Northstar will alternately cut
cylinders
when in Overheat Mode. More Bits and pieces of code to be used down
stream , in GMs way of thinking, I gather.
Len
>Not exactly EFI related, but GM related.
>
>New York Times, Business section, 5/29/01 article says GM is in concept
>with a new version of the 1981 "4-6-8" motor in trucks which alternates
>between 8 and 4, no 6 due to vibrational problems. Says a 8 to 10%
>increaes in fuel efficiency.
>
>"In the new version, an electronically controlled hydraulic system, which
>uses ordinary engine oil, is used to alter the lifters... The lifters
>shorten themselves by telescoping, thus closing off the valves".
>
>-> Bob Valentine
>-> bob at tecmark.com
>
>
>
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