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Kenworth Predictive Cruise Update Ups Fuel Economy

February 3, 2017

Photo: Kenworth
Photo: Kenworth

Kenworth has updated its Predictive Cruise Control functionality for T680 and T880 trucks equipped with the 2017 Paccar MX-11, MX-13, and Cummins X15 engines to improve fuel economy.

The update was made with the launch of 2017 emission engines and provides up to a 1% improvement in fuel economy over the current versions with Predictive Cruise Control, according to Patrick Dean, Kenworth chief engineer.

Kenworth’s Predictive Cruise Control combines GPS with cruise control to deliver the best fuel economy for the situation.  The system optimizes cruising speed based on topographical GPS data inputs. As the truck encounters certain types of terrain, such as rolling hills, the system modulated cruising speed to improve performance.

If, for example, a truck ascends and crests a hill, Predictive Cruise Control will allow the vehicle speed to drop slightly below the set cruise speed. This can improve fuel economy since the truck is using momentum instead of fuel to maintain the set cruise speed.

“While the driver interface remains unchanged, drivers who have driven Kenworth trucks with Predictive Cruise Control will notice an improvement in drivability, as well as fuel economy,” said Dean. “Improved drivability and fuel economy were made possible by fine-tuning how the engine modulates speed and torque over a wide variety of actual driving conditions.”


  1. 1. Sean James [ May 04, 2017 @ 04:17AM ]

    Really! Good way to destroy a transmission and or cause an accident, and or get a speeding ticket in CA! This may be fine for rolling hills, but
    West of Denver it is a complete joke! As you descend a grade, you use the jake to maintain your downhill speed, you then reset the cruise speed on flat terrain to maintain your speed. Then as you approach the next uphill grade you cut the cruise, and use throttle to accelerate up the mountain and the engine cuts out, falling flat on it's face. You have drivers behind you cursing at you and blowing their horn's as they pass you. You try to downshift, but the engine will not rev up to match the transmissions speed, but three seconds later the computer figures out what you are trying to do...the whole time while grinding the gears trying to figure out what the hell is going on. This whole system is a freaking joke and damn dangerous in the Mountain States. At what price is a 1% fuel saving over the cost of an accident. And fuel savings are totally lost as the truck has slowed down so much that you must downshift two or three gears to try to make up the speed that the stupid ecm has caused you to lose. All the while looking like an idiot first time driver holding up dozens of trucks behind you on the two lane interstates! This system is a joke, and we have disabled it on our trucks in the interest of safety, driver frustration, and WORSE fuel economy! Some engineers are just educated beyond their intelligence.


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