Controlling gear engagement and disengagement on heavy trucks for minimization of fuel consumption
There is a potential to save fuel for heavy trucks by storing kinetic energy
in the vehicle when driving downhill, because the speed adds kinetic energy
to the vehicle which can be used after the downhill slope to propell the
vehicle. This behavior can be even more utilized by disengaging the gear to
reduce the friction in the driveline and thus increase the speed even
more. Two dierent control strategies to choose when to disengage the gear
is presented: One that uses instantaneous inclination and one predictive
control scheme that uses look ahead information of the road
topology. Simulation results show that gear disengagement in downhills can
reduce the fuel consumption about 3%.
Anders Fröberg, Lars Nielsen, Lars-Gunnar Hedström and Magnus Pettersson
IFAC World Congress,
2005
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