"With Displacement-on-Demand, the powertrain control module determines load conditions from vehicle sensors and driver commands. Under light load this sophisticated, 32-bit controller automatically closes both intake and exhaust valves on alternate cylinders of each cylinder bank (for example, numbers 1, 7, 4 and 6 cylinders). The valves are reopened the instant the control module determines that vehicle speed or load requires more power. The module also controls fuel injectors, electronic spark advance, and electronic throttle for transition between V-4 and V-8 operation so quickly that engine output increases immediately. The switchover is seamless and virtually imperceptible. The engine is started on eight cylinders."
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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