help me in design calculation for hybrid car

[chipsmore29]

Hye everyone....
My project is regarding with hybrid car.can someone show me the calculation and the formula used to proved this value.taking example honda insight:

for engine:

Engine Type: In-Line 4-Cylinder
Displacement (cc): 1339
Horsepower @ rpm (Combined: engine (SAE net) + electric motor): 98 @ 5800
Torque (lb-ft @ rpm, combined engine (SAE net) + electric motor): 123 @ 1000-1700
Bore and Stroke (mm): 73 x 80
Compression Ratio: 10.8 : 1
Valve Train: 8-Valve SOHC i-VTEC®

how do they get the horsepower and torque?what is the formula used?

for electric motor (BLDC motor):

Power (hp @ rpm): 13 @ 1500
Torque (lb-ft @ rpm): 58 @ 1000

how do they get the horsepower and torque?what is the formula used?

additional info:

battery specs:

Output (Volts): 100.8
Rated Capacity: 5.75 Ah

I really stuck here...Please help me.Thank you all

[shorod]

Are you looking for a formula that will give you the HP and torque numbers based on the inputs (engine displacement, motor supply)? Not gonna happen, there are several other factors that come in to play, including efficiencies and build quality.

That's one of the things I dislike about vacuum cleaner ads - "12 amps of cleaning power!" I'm pretty sure I could loosely hand wind an electric motor and put it in a vacuum with undersized bushings that draws 20 amps of inrush current, but doesn't have anywhere near the suction of a Dirt Devil hand vac.

-Rod

[chipsmore29]

thanks shorod....yes im looking for a formula that will give me the hp and torque numbers based on the input....can someone show me the calculation/formula/other factor needed for this?just use the example given above and justify it....can show me the flow of calculation and formula needed including efficiency etc....thanks in advance

[crd14]

What your asking is for someone to teach you mechanical and electrical engineering and then prove to that all they are teaching you is true. That's a pretty tall order and I don't think you'll get any takers.

I can tell you that the electric motor will produce an output power equivalent to the input power times the efficiency. In this case they claim 13HP but I can tell you that with less than 6 ampere hour capacity this will be for a very short duration. 13HP is over 12000 Watts of power into the motor at 80% efficiency. If the battery can maintain 80 volts under full load then current draw would be in the vicinity of 150 amperes. So, at full load the battery charge has a theoretical life of about 2.3 minutes and I can tell with absolute certainty it will, in real life, be considerably shorter. This is a best case scenario! When the temperature departs from optimum and/or the battery sulfates everything goes down hill from there.