Ford Diesel Technology
Old 09-08-2009   #1 (permalink)
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Default Ford Diesel Technology

The Ford-engineered, Ford-tested and Ford-manufactured 6.7-liter Power Stroke V-8 turbocharged diesel engine brings a new era in Ford diesel technology.

The capability and reliability found in the new 6.7-liter diesel engine starts with the engine block. The new Power Stroke's block is made from compacted graphite iron (CGI), which is about twice as strong as regular gray cast iron. While this is the first use of a CGI block in North America in this class of vehicle, Ford has successfully used the material in engine blocks in other products around the world.

"Using a CGI block is the perfect solution for the new 6.7-liter Power Stroke," said Adam Gryglak, lead 6.7-liter diesel engineering manager. "It provides the strength necessary for the increased torque and horsepower produced by our new engine, and it also offers significant weight savings."

The diesel engine's deep-skirted block and main bearing caps are cross-bolted for additional stiffness and to aid NVH. The cylinder heads mirror the engine's attributes as a whole, with lighter weight combined with increased robustness: The cylinder heads are made of aluminum to save weight and, for improved sealing, feature six head bolts per cylinder versus the four head bolts found on other engines.

The cylinder heads, which feature dual water jackets, are capable of firing pressures approaching 2,600 psi. The tall water jacket works as a manifold, flowing high-velocity water for cooling and adding to the structural robustness in the head to handle the higher firing pressures. Crankshaft durability is improved through Ford's unique undercut and fillet roll treatment to relieve stress.

The valvetrain features patented dual hydraulic lash adjustors, which improves the performance and reliability of the valvetrain by using two pushrods per cylinder instead of the conventional single pushrod, with individual rocker arms. Other proven components round out the engine hardware, including fractured-split connecting rods and a fuel system capable of generating 30,000 psi to feed the common-rail direct-injection fuel system.

The oil pan, which bolts to the transmission, also acts as a structural member for improved powertrain stiffness and adds to Ford's legacy of virtually bulletproof lower-engine architecture.

The tradition of “Built Ford Tough” continues. See your Ford Dealer for details.
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