- #1
kvkskumar
- 5
- 0
Hi,
I'm creating software based simulations for different components of a car. I've some query regarding this. Also please let me know if what I'm doing is correct or not
1. Engine component
It would take the acceleration request and fuel injection(set at the beginning) and would compute output power accordingly. (power = some factor * fuel * request)
Here my query is if I'm considering that engine is not connected to anything. Its output is a shaft turning at some rpm with some torque. How do I know what torque is it generating and what is the rpm
2. gear train
It is combination of gears that connects to shafts. According to the gear ratio, the output torque and rpm would change.
Here my query is what would happen if the two ends at the time of engaging them are at different rpms or torque (not related by the gear ratio)
3. car body
It takes the input torque from engine via gear and performs motion
Here I'm taking the torque from engine via gear(with gear ratio) and converting it to drive force. I'm subtracting the resistive forces(drag, friction...) and then dividing it with mass to get acceleration
I've read from some forums that drive speed of wheels may be calculated from rpm of shaft from engine via gears.
I'm thinking that, the speed of car would start from zero to increase with the acceleration obtained from engine torque and would go till the max value of drive speed from engine rpm. Am I correct? If I'm correct what would happen if the speed goes beyond drive speed found from the engine rpm using the formula(already have it)
Please remember I need to create each component thinking that are not connected to anything and I cannot depend on numbers from other components for generating torque/power/rpm in engine
Any formulas/references may be helpful
Thanks in advance
I'm creating software based simulations for different components of a car. I've some query regarding this. Also please let me know if what I'm doing is correct or not
1. Engine component
It would take the acceleration request and fuel injection(set at the beginning) and would compute output power accordingly. (power = some factor * fuel * request)
Here my query is if I'm considering that engine is not connected to anything. Its output is a shaft turning at some rpm with some torque. How do I know what torque is it generating and what is the rpm
2. gear train
It is combination of gears that connects to shafts. According to the gear ratio, the output torque and rpm would change.
Here my query is what would happen if the two ends at the time of engaging them are at different rpms or torque (not related by the gear ratio)
3. car body
It takes the input torque from engine via gear and performs motion
Here I'm taking the torque from engine via gear(with gear ratio) and converting it to drive force. I'm subtracting the resistive forces(drag, friction...) and then dividing it with mass to get acceleration
I've read from some forums that drive speed of wheels may be calculated from rpm of shaft from engine via gears.
I'm thinking that, the speed of car would start from zero to increase with the acceleration obtained from engine torque and would go till the max value of drive speed from engine rpm. Am I correct? If I'm correct what would happen if the speed goes beyond drive speed found from the engine rpm using the formula(already have it)
Please remember I need to create each component thinking that are not connected to anything and I cannot depend on numbers from other components for generating torque/power/rpm in engine
Any formulas/references may be helpful
Thanks in advance