12-20-2015, 03:18 PM
How the estimated miles remaining (EMR) is calculated will be the key. Is it a simple arithmetic average of fuel consumption since the last refuel? Is it a sliding weighted average? Is it the average fuel consumption since day one? Can it be reset? I don't know the answer to these questions so I can only surmise that it is total average fuel consumption or average fuel consumption since last reset, neither being weighted. However any will give you a misleading result if riding conditions change quickly and you are nearing the end of the tank. For instance, out of the city I expect a tank ('10 model) to give me between 230 and 250kms. In the city I can get as little as 160kms to the tank; stopping, accelerating up to second and then stopping again really gulps the juice.
So if you are doing some "easy riding" the EMR might be, using your example, 30 miles. If you continue on your easy ride then that would be a reasonably accurate estimate. However if you enter heavy stop/start traffic conditions, or if you jack the RPMs up to 5-6000 to do a little knee down work, it will be inaccurate and you may have as little as, say, 15 miles remaining in the tank. Any averaging method, simple or even weighted, cannot "catch up" in the short time that remains. An averaging method must be used as a simple EMR calculated on the instantaneous fuel consumption would mean a wildly fluctuating EMR based on the current throttle position. Totally useless.
The solution? Just get to know the bike a bit better is the only answer I can give. Those of you that actually own one of them new fangled digital CBs may be able to come up with a better explanation, or even solution, to EarsonWheels' vexations.
Cheers
So if you are doing some "easy riding" the EMR might be, using your example, 30 miles. If you continue on your easy ride then that would be a reasonably accurate estimate. However if you enter heavy stop/start traffic conditions, or if you jack the RPMs up to 5-6000 to do a little knee down work, it will be inaccurate and you may have as little as, say, 15 miles remaining in the tank. Any averaging method, simple or even weighted, cannot "catch up" in the short time that remains. An averaging method must be used as a simple EMR calculated on the instantaneous fuel consumption would mean a wildly fluctuating EMR based on the current throttle position. Totally useless.
The solution? Just get to know the bike a bit better is the only answer I can give. Those of you that actually own one of them new fangled digital CBs may be able to come up with a better explanation, or even solution, to EarsonWheels' vexations.
Cheers