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S60 & V60 '18> / XC60 '17> / S90 & V90 '16> / XC90 '15> General Forum for the SPA-platform 60- and 90-series models |
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Feb 15th, 2019, 10:04 | #31 |
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I think both of you (Quacker and mdm) are right- on steep descents engine braking is required for safety reasons + consumption is lower if in gear with no throttle- whereas on flat (or near-flat..) sections (where engine braking is not required..) consumption benefits from freewheel rolling - as the car maintains the speed for some time- due to inertia.. And this is exactly how Volvo designed the freewheel coast function:
"Free-wheel function Eco Coast The freewheel function Eco Coast means in practice that engine braking ceases, meaning in turn that the car's kinetic energy is used to freewheel for longer distances. When the driver releases the accelerator pedal the gearbox is automatically disengaged from the engine whose speed is reduced to idling speed with reduced consumption. The function is best used where it is possible to freewheel a long way, e.g. roads with a slight downhill gradient or when there is a predictable speed reduction to freewheel into a zone with a lower speed limit. Activating the freewheel function The function is activated when the accelerator pedal is fully released, in combination with the following parameters: Drive mode Eco is activated. The gear selector is in D position. Speed within the range of approx. 65-140 km/h(40-87 mph). The road's downhill gradient is not steeper than approx. 6%. The driver display shows COASTING when the freewheel function is being used. Limitations The freewheel function is not available if: Engine and/or gearbox are not at normal operating temperature. The gear selector is moved from the D position and the manual position. The speed is outside the range of approx. 65-140 km/h(40-87 mph). The road's downhill gradient is steeper than approx. 6%. Manual gear changing is performed with the steering wheel paddles*."
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V60 D3 V60 D5 RD XC60 D5 RD AWD XC40 B4 RD AWD |
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Mar 26th, 2019, 22:15 | #32 | |
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Coasting, the definitive proof that it uses more fuel
Quote:
[YOUTUBE]https://youtu.be/GOc-0l3lfrY[/YOUTUBE]
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XC90 D5, 2017 Inscription. Dark Grey. Xenium pack. Winter Plus with HUD. Black leather interior with alloy trim inserts. Ownership ended June 2020, Happy motoring times! Last edited by Quacker; Mar 26th, 2019 at 22:18. |
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