On a downward gradient where the truck can coast EfficientRoll is activated and automatically shifts transmission to neutral and rpm drops to idle. In 2016 EfficientCruise was revamped and became EfficientCruise 2, which incorporated EfficientRoll. It stops any unnecessary changes down the box – a common occurrence with cruise control – and it uses an underrun speed threshold to allow the truck to coast, or roll, over a hill and then use gravity to regain road speed.
The engine management system adjusts speed and selects the right gear to achieve optimum fuel economy in relation to the topography. Like its competitors, MAN EfficientCruise uses GPS to assess roads up to 3km ahead.
MAN’s version is EfficientCruise officially launched at IAA Commercial Vehicle Show in Hanover in 2014 and it went to market in the UK the following year. PCC became a reality six years ago with systems from Mercedes-Benz, Scania and Volvo. Combining automated transmissions, cruise control and global positioning system (GPS) manufacturers finally came up with something smarter than the average truck driver. The collective answer from the OEMs is predictive cruise control (PCC). To achieve these savings, manufacturers have had to literally think ahead. Operators want something tangible to offset the cost. These trucks might be more environmentally friendly but they’re also more expensive. The step up to Euro 6 has changed all that. Often, it’s a team effort that involves removing the sun-visor, redesigning the front corner, tweaking the engine, and revamping the transmission software package and you might just save 2%, if you’re willing to stump up several grand for it. Rarely does a single product deliver big fuel savings on its own. Kevin swallow asked the manufacturer to put its money where its mouth is. Launched with little fanfare MAN’s version of predictive cruise control – efficient cruise – was said to save operators up to 9% on fuel.
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