- #1

i_am_imbact

- 4

- 0

Hello guys

I have a motorcycle engine in which I know the ratios of the transmission. and given the diagram of Power and rpm I made a function of P(ω) which is a polynomial of 6 order.

Then I said that F(friction)*u=P(ω) then I substitute ω=u*r/v v(ratio) and have F(u).Next knowing the Pmax and the ratios I found the speed in which we should change the gear 1st to 2nd and etc (Fu=Pmax) and in the end I have 5 equation of F (5 gears in the transmission).

In the end I tried to solve the first differential for the first gear (Fu-1/2*b*cd*u^2=m*du/dt) but there is no solution(tried to solve it with matlab).Do you know what I have to change or where I did a mistake in order to solve my problem?

Thank you for your time

I have a motorcycle engine in which I know the ratios of the transmission. and given the diagram of Power and rpm I made a function of P(ω) which is a polynomial of 6 order.

Then I said that F(friction)*u=P(ω) then I substitute ω=u*r/v v(ratio) and have F(u).Next knowing the Pmax and the ratios I found the speed in which we should change the gear 1st to 2nd and etc (Fu=Pmax) and in the end I have 5 equation of F (5 gears in the transmission).

In the end I tried to solve the first differential for the first gear (Fu-1/2*b*cd*u^2=m*du/dt) but there is no solution(tried to solve it with matlab).Do you know what I have to change or where I did a mistake in order to solve my problem?

Thank you for your time

Last edited by a moderator: