How to find the shift pattern?

Hi,

I've got a curve (and data) in which the Rpm-schedule of an engine is plotted, and the purpose is to find the shift pattern of the car.

Does anyone know how to find that out? Or to find out when the shifting takes place?

I've also got the data/curve of the vehicle speed and fuel consumption, just in case I'm using the wrong curve to find my answer.

Below is the curve I'm using.

Thanks in advance!

Answer 1

[Kartik Adsule]

If you have the vehicle speed, you can compute the gear ratio = vehicle speed/ engine speed, whenever the gear ratio changes there is a gear shift happening. That should probably work.

[HV]

Thanks,

But how do I compute those two?

[HV]

I tried to do what you suggested, but I got this out of it.

What did I do wrong?

Answer 2

[Kartik Adsule]

Sorry for the late reply.

Your vehicle speed needs to be in rpm (basically angular velocity). Also, can you show the plot of vehicle speed, it looks like its zero throughout. Is the sampling time of engine speed and vehicle speed same?

[HV]

Yes, it is the same.