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Originally Posted by e92zero
I am very interested in this topic actually. How does the other companies' system work?
- Do the valves still open/close when the cylinder is deactivated? I remember to have read that the intake/exhaust valves stay close on the deactivated cylinders to minimize pumping lost but how is it implemented in an overhead cam design?
- Is it always the same cylinder that get deactivated? Seems to be but wouldn't this cause uneven wear on the engine in the long run?
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The GM and Chrysler systems deactivate specific cylinders by using a special valve lifter. The ECU controls oil flow solenoids for the unique lifter to prevent the exhaust valve from opening. The injectors on those cylinders are also shut-off.
E92zero:
PM me with your email and I can send you a PDF file with more information and color photos. I just attended a great webinar on Active Fuel Management systems. I teach automotive technology and there are always plenty of new changes.