SERIES 60 ON-HIGHWAY ENGINE OPERATOR'S GUIDE DDEC V ENGINE DRIVING TIPS Driving with an electroncially controlled engine feels different from driving with a mechancially goverened engine. Cruise Control For added driver convenience and comfort, DDEC V also features a Cruise Control option that works just like the system in your car. It can be operated in any gear above 1000 rpm or road speed faster than 20 mph (32 kph), up to the rated engine speed. And it can be programmed to hold your road speed at or below the maximum vehicle speed. The switch to energize Cruise Control is usually mounted on the instrument panel. See Figure 9.
Accelerating the Vehicle Engine response versus pedal movement may feel different from the mechanical-governed engine you were driving. The Accelerator Pedal was designed to communicate “percentage” foot pedal travel to the engine's Electronic Control Unit (ECU). The engine will respond accordingly to the driver's demand. Another throttle or governor characteristic you may need time to get used to is the DDEC Limiting Speed Governor. This allows the driver to command total engine response between idle and rated speed, such as accelerating at half throttle – an advantage when driving under slippery conditions.
If you require wide-open throttle engine response, either accelerating or just plain pulling hard, the throttle (AP) will have to be held to the floor. To obtain 100% fueling at any speed, the Accelerator Pedal will have to be maintained at the fully pressed position. Figure 9 Typical Cruise Control Switches All information subject to change without notice. 35 DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION