[Diy_efi] Area under torque curve?

[Mike Schwall]

Suggested reading: http://www.vettenet.org/torquehp.html

Mike


> -----Original Message-----
> From: diy_efi-admin at diy-efi.org 
> [mailto:diy_efi-admin at diy-efi.org] On Behalf Of mrbeau0
> Sent: Saturday, January 04, 2003 3:41 PM
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] Area under torque curve?
> 
> 
> All,
> 
> Not to beat this to death, but there's another way of looking 
> at this which
> may help understand the difference between torque and HP.
> 
> We're interested in increasing the velocity over time (i.e. 
> m/s^2).  This is
> called the acceleration (or "a") of a vehicle.  The vehicle's 
> energy (J for
> joules) is proportional to it's mass times the velocity 
> squared ( 1/2 * m *
> v^2).  Assuming the mass stays the same, if you increase the 
> energy of the
> vehicle, you are speeding it up.  This change in energy happens over a
> period of time, and the change of energy per unit time is the 
> definition of
> power (which is J / s).
> 
> So, if the vehicle accelerates from 10 m/s to 20 m/s in 2 s, 
> and it weighs
> 1000 kg, what power did it take?
> 
> Easy:  .5 * 1000 kg * (20^2-10^2) m^2 / s^2
>        ---------------------------------
>                       2 s
> 
> =  75000 J / s  =  75000 W = 75 kW = ~100 hp
SNIP


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