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The DE 10 basic pump model uses a fixed cam, spill-pump-spill fuel and timing control that was originally targeted for constant speed applications. As the variety of customer engine configurations has expanded, Stanadyne has recognized that the DE 10 was the simplest alternative for variable speed applications, as well. The DE 10 is designed for economical electronic full authority fuel and timing control, with injection pressures to 14,500 psi.Typical performance features managed by an electronic control module include cold-start timing advance, excess cranking fuel, fuel curve shaping for turbo boost compensation, temperature compensation, and transient fuel and timing control. All governing options are electronically controlled, as well. The spill valve closure signal provides closed-loop timing feedback without an additional timing sensor.

The new control system also includes an optional pattern changer valve on the 420D and 430D, allowing the operator to select different control patterns. "This is helpful if the machine is to be used in the rental markets," said Carman. "The feature allows the machine to be set up to match the type of control pattern with which the operator may have experience. With this feature, the operator can get on the machine and very quickly become efficient rather than having to relearn how the controls operate the machine." In the standard configuration, the 416D is powered by the naturally aspirated 4.2 L Cat 3054B diesel engine rated 75 hp net at 2200 rpm. The 4.0 L turbocharged Cat 3054T diesel engine rated 80 hp net at 2200 rpm is available as an option. Both engines are four-cylinder direct-injection units.

The AI controls engineer frowned at the speaker, a young mechanical engineer in charge of the physical design of a state-of-the-art biological water processor (BWP). "That pump doesn''t give me any feedback for speed, so we can''t be sure it''s responding to commands.""It''ll have to do," said a woman at the far end of the conference table. As the manager for the Integrated Water-Recovery System (IWRS), she made the final calls. "The eight-head pump won''t function at the required pressures, and the four heads are just too expensive. Can''t you use the tube pressures to know if the pumps are working?"