EcoModder Forum Orbis Wheel

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Not Doug

Join Date: Jun 2012
Location: Show Low, AZ
Posts: 9,871

Chorizo - '00 Honda Civic HX, baby! :D
90 day: 35.35 mpg (US)

Mid-Life Crisis Fighter - '99 Honda Accord LX
90 day: 31.32 mpg (US)
Thanks: 6,634
Thanked 1,884 Times in 1,430 Posts
Quote:
 Originally Posted by Taylor95 I would say the mpg increase would be closer to 50-75% depending on the vehicle. These wheels add 100 hp, which is very significant when you consider that most engines make around 160-180 hp at the crank. That would end up being like 125 or so hp to the wheels. Your engine would have to work half as hard to maintain 60 mph. What if your mpg increased to say 110 mpg? Then would it be worth it?
Are we talking about an F150? If you have all of the numbers, you can use this to calculate how many horsepower your car needs: https://ecomodder.com/forum/tool-aer...resistance.php

I could not find all of the numbers for an F-150, so I am just quoting this:
Quote:
 Originally Posted by darcane Power required to overcome aerodynamic drag is proportional to velocity cubed. If you know how much power is needed at a specific speed to overcome aero drag, you can figure it out at other speeds. If it takes 12hp to keep your car going at 60mph on level ground (assume 10hp for aero, 2hp for rolling resistance) you'll need 24hp at 80mph and 46hp at 100 just to overcome aero drag. Rolling resistance is directly proportional to velocity, so it would be about 26hp and 50hp total, respectively.
https://ecomodder.com/forum/showthre...tml#post376742

I do not know for what weight vehicle the 12 HP figure would be accurate, but let's take my 1,075 kg and 115-pound HX, remove the back seat, drop in a 540 kg Tesla battery, and now I have a 1,615 kg 225 HP 2-seater that needs a suspension upgrade.

Now I need 18 HP at 60 MPH and... what is the point of a car like this? To need to fill up and charge, which I really do not think you would want to do at the same time?

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Master EcoModder

Join Date: Aug 2018
Location: USA
Posts: 346

Jeep - '97 Jeep Cherokee Sport
90 day: 19.36 mpg (US)

Blueberry - '07 Toyota Camry SE
Thanks: 121
Thanked 61 Times in 55 Posts
Quote:
 Originally Posted by Xist Are we talking about an F150? If you have all of the numbers, you can use this to calculate how many horsepower your car needs: https://ecomodder.com/forum/tool-aer...resistance.php I could not find all of the numbers for an F-150, so I am just quoting this: https://ecomodder.com/forum/showthre...tml#post376742 I do not know for what weight vehicle the 12 HP figure would be accurate, but let's take my 1,075 kg and 115-pound HX, remove the back seat, drop in a 540 kg Tesla battery, and now I have a 1,615 kg 225 HP 2-seater that needs a suspension upgrade. Now I need 18 HP at 60 MPH and... what is the point of a car like this? To need to fill up and charge, which I really do not think you would want to do at the same time?
Does this system need to be charged? If so, that takes away most of the value I placed on Orbis. I thought it would be like a regular hybrid. I haven't come across anything that said it needs to be charged.

I actually have a Silverado in mind, which is pretty similar in terms of weight and cd. It would be used for towing occasionally as well as being a daily. Having the orbis wheels would be great on this--as long as charging is not a requirement.

In my experience, increasing horsepower will increase mpg as long as you don't drive the vehicle aggressively in most applications.

Cyborg ECU

Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,092

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,307
Thanked 2,023 Times in 1,380 Posts
Quote:
 Originally Posted by Taylor95 Does this system need to be charged? ...
They were never very direct about that, even though they talk about EV only operation. Since they have sold some rights to something like a venture capital firm, rather than continuing to market, I think we can see where they were finessing their reporting to the public. They also gave the impression that it could work seamlessly as AWD with the existing throttle and such but never explained the motor controller or throttling in any detail. We'll see if it ever really comes to market now. They musta just gotten quite a payday.
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

 The Following 2 Users Say Thank You to California98Civic For This Useful Post: Taylor95 (08-09-2019), Xist (08-09-2019)
 08-09-2019, 07:47 PM #34 (permalink) Not Doug     Join Date: Jun 2012 Location: Show Low, AZ Posts: 9,871 Chorizo - '00 Honda Civic HX, baby! :D 90 day: 35.35 mpg (US) Mid-Life Crisis Fighter - '99 Honda Accord LX 90 day: 31.32 mpg (US) Thanks: 6,634 Thanked 1,884 Times in 1,430 Posts It needs to be powered somehow. If they developed a Mr. Fusion that is a much bigger deal than this.
Cyborg ECU

Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,092

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
Thanks: 2,307
Thanked 2,023 Times in 1,380 Posts
Quote:
 Originally Posted by Xist ... Mr. Fusion ...
lol
__________________
See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

 08-09-2019, 11:47 PM #36 (permalink) Master EcoModder   Join Date: Aug 2018 Location: USA Posts: 346 Jeep - '97 Jeep Cherokee Sport 90 day: 19.36 mpg (US) Blueberry - '07 Toyota Camry SE Thanks: 121 Thanked 61 Times in 55 Posts Why can't the engine charge the batteries? Isn't that how a prius works?
Not Doug

Join Date: Jun 2012
Location: Show Low, AZ
Posts: 9,871

Chorizo - '00 Honda Civic HX, baby! :D
90 day: 35.35 mpg (US)

Mid-Life Crisis Fighter - '99 Honda Accord LX
90 day: 31.32 mpg (US)
Thanks: 6,634
Thanked 1,884 Times in 1,430 Posts
Quote:
 The Prius HSD has two motor-generators, call MG1 and MG2. MG1 is smallish and used to spin the ICE and to transfer power from the ICE to MG2. MG2 is larger and is used as a prime mover and for regenerative braking. Both MG1 and MG2 are sometimes used as electric motors, and sometimes as generators. The electricity generated from MG1 and MG2 is either used to move the car or charge the HV (traction) battery. The small 12V battery, which is like the battery on a "normal" car, is charged from the HV battery by means of a DC to DC converter, which steps down the high voltage to that of the 12V battery. The DC to DC converter also supplies the 12V accessory needs when the Prius is in run mode (lights, radio, MFD, etc.).

A standard alternator would be absolutely inadequate. If Orbis Wheels worked, they should be able to provide regenerative braking, but you would need a far more powerful alternator to charge the battery the rest of the time, and the Toyota system uses the "alternators" as motors, too.