Recent content by harvi101

i am a msc automotive student looking for simulink tutorials related to the hybrid electric powertrains.

this how i calculated the forces Vehicle Data Vehicle selected for engine sizing is Small Hatch back Vehicle type Mass (kg) CdA (m2) rtypre(m) Vmax(Km/h) Small hatch 950 (unladen) 0.61 0.27 144 Calculations for the payload Assuming weight of one passenger =...

losses rolling resistance = 139.80 aero drag = 11403.05 gradient = 342 Total Losses = 11884.55 = 12 kw is it ok

thanks man 55kw seems ok . at least now i have starting point . i am thinking of taking bmep = 9 bar and port velocity = 70 m/s and three cylinder 2 valve engine with wedge shape.

but i don't know how he calculated d/D = 0.45 ( d= valve dia, D= bore) in step C.

yes i have already mentioned it SI NA 4- stroke

thanks xxChrisxx i'll try to solve it my taking 40 kw as the required power

its our assignment and this the example given by our teacher

any good method to calculate the power required from engine to achieve the 144 kmph speed from speed trap method hp = weight x (velocity/234)x(velocity/234)x(velocity/234) hp = 117.09844102277 horsepower ( without the passanger weight ) = 87.32 kw which is really high for a small car

engine size example required power = 50 kw A. choose 2 valve wedge/bathtub SI NA 4- stroke combustion chamber B. bmep : 10 bar (torque peak and this value is assumed ) would be appropriate; also 20% back up so bmep@power peak = 10/1.2 = 8.33 bar C. allow Pmax (choose max port velocity)...

how can i size the engine for small hatch back car.

how to calculate the horse power ? if the car weights 950 kg and its top speed is 144 km per hour. how can i size the engine from this data aerodynamic drag coffi = 0.65, tyre radius = 0.27m. please help.

hi i am doing a project on the Hybrid Powertrain Solutions for Niche Vehicles any suggestion on how to start this project it involves designing as well as optimizing. how can we calculate the power requirement of the vehicle and how to optimize the packing of the vehicle. which software...