Optimal speed for hypermiling - Hyundai Ioniq Forum
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post #1 of 34 (permalink) Old 28-05-18, 01:24 PM Thread Starter
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Question Optimal speed for hypermiling

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they just drove around the block at some 20 to 30 mph until the battery died
Link: https://insideevs.com/tesla-model-3-...t-606-2-miles/

It has been suggested that optimal speed for Ioniq is about 70 - 80 km/h (43 - 50 mph), but I suspect that speed, giving maximum range, is far lower, like 35 - 50 km/h (22 - 30 mph). It seems the testers here chose such low speed.

Regards, Knut, driving a 2017 Marina Blue Ioniq Plug-in Premium SE
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post #2 of 34 (permalink) Old 28-05-18, 02:07 PM
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I wonder if one can hypermile more by going up and down a mountain road...
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post #3 of 34 (permalink) Old 28-05-18, 02:54 PM
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I cruise to work mainly motorway at 55mph, and when I get home or work, distance travelled plus range left = 36 miles, only started with 37 mile EV range so that cant be far off optimal speed

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post #4 of 34 (permalink) Old 28-05-18, 03:01 PM
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The range indication of your car is not the optimal range, but the range for your own way of driving as the car has observed in your previous trips.

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post #5 of 34 (permalink) Old 28-05-18, 03:55 PM
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Quote:
Originally Posted by knutsp View Post
Link: https://insideevs.com/tesla-model-3-...t-606-2-miles/

It has been suggested that optimal speed for Ioniq is about 70 - 80 km/h (43 - 50 mph), but I suspect that speed, giving maximum range, is far lower, like 35 - 50 km/h (22 - 30 mph). It seems the testers here chose such low speed.
From what I've seen, 70-80km/h tends to be optimal for the gas engine, while 35-40 km/h is optimal for the electric motor.
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post #6 of 34 (permalink) Old 28-05-18, 04:54 PM
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I made a spreadsheet calculating the theoretical energy requirement for the Ioniq to travel 100km. Some are assumptions such as rolling resistance constant since I can't find the actual numerical value for the Michelin Energy Saver tires. Same goes for the frontal area, I just guess-timated based on the graph.

No idea whatís optimal, but it gives an idea of the theoretical maximum distance.
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post #7 of 34 (permalink) Old 28-05-18, 05:00 PM
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a steady 50mph / 80kph is the best speed for hyper miling I found, but 60-62mph / 95-100kph s the best compromise for speed and economy from the many miles of fun I have had
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post #8 of 34 (permalink) Old 28-05-18, 05:22 PM
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If you really want to hypermile, your best results are likely to accelerate to 60 mph (pulse), and coast to 25 mph (glide). Steady state speed is not hypermiling.

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post #9 of 34 (permalink) Old 28-05-18, 06:08 PM
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Quote:
Originally Posted by sth128 View Post
I wonder if one can hypermile more by going up and down a mountain road...
YES ! I live in Colorado and do this all the time. I'm about 5 miles from the foothills and drive through that area frequently. If I make a loop through the hills that ends back at my house, my gas mileage as reported by the car always goes up a few tenths of MPG where it does not if a similar length trip is made on the flats.

Similarly if I make a longer trip such as up over the mountains on I-70 then back home again a few days later, my mileage is higher than if I just make a highway trip to Denver an back (which is on the way to the mountains).

This was the same effect with my former Prius. In the end, the car seems to get better gas mileage improvement on the downhill than it loses on the uphill.
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post #10 of 34 (permalink) Old 29-05-18, 05:30 AM
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Quote:
Originally Posted by knutsp View Post
Link: https://insideevs.com/tesla-model-3-...t-606-2-miles/

It has been suggested that optimal speed for Ioniq is about 70 - 80 km/h (43 - 50 mph), but I suspect that speed, giving maximum range, is far lower, like 35 - 50 km/h (22 - 30 mph). It seems the testers here chose such low speed.
Speed can't be that low with a Cd of 0.24. Momentum MUST play it's part, before the drag starts to exponentially increase.
Momentum not only adds `drag-free` distance (with regen off) , but also possible regen assistance when it's on...

Simon Evans
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