Quote:
Originally Posted by TimV
Can you explain why cilinder deactivation is not good?
I have a vgt turbo.
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A diesel always operates at "full throttle" simply because it has none. Fuel control is how you moderate power production.
A spark ignited gasoline engine uses a throttle. This causes the pumping losses talked about in depth on this and other forums. Cylinder deactivation results in larger throttle opening and a decrease in the pumping losses. Diesels do not have this pumping loss to begin with.