Official Baja SAE Forums Homepage
Forum Home Forum Home > General > Design Discussion
  New Posts New Posts RSS Feed - Gears and CVT
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Gears and CVT

 Post Reply Post Reply
Author
Message
zeeshan View Drop Down
Bolt Sorter
Bolt Sorter
Avatar

Joined: Dec/03/2012
Status: Offline
Points: 4
Post Options Post Options   Thanks (0) Thanks(0)   Quote zeeshan Quote  Post ReplyReply Direct Link To This Post Topic: Gears and CVT
    Posted: Dec/03/2012 at 4:56am

Is it a good idea to use 2 constant reduction gears alongwith CVT 
1 can be for climbing where high traction is required and other can be for high speed
Also how to decide these ratios
for high speed its alright but for traction how do I calculate the reduction ratio
Back to Top
zglazer View Drop Down
Baja Godfather
Baja Godfather


Joined: May/27/2012
Location: Metro Detroit
Status: Offline
Points: 593
Post Options Post Options   Thanks (0) Thanks(0)   Quote zglazer Quote  Post ReplyReply Direct Link To This Post Posted: Dec/03/2012 at 12:54pm
Selecting gearbox ratios is one of the most difficult aspects of drivetrain design and it's something that you'll have to figure out yourself based on the other components in your drivetrain as well as the design aspects and goals for the entire baja vehicle. Whether or not that gives you a two-speed gearbox as an ideal solution will depend on your specific situation.

For selecting ratios, you just need to look at the different physical conditions your baja will be under throughout its life and decide which aspects you want to optimize it for and in what way it should be optimized. I'm not going to be more specific than that because it's a very open-ended problem and there are many different approaches to it.

One thing I will say is that traction doesn't depend on your ratio; it's a function of the interaction between your tires and the ground surface as well as the vehicle weight. A larger reduction increases the amount of force you have at the ground which will allow you to take better advantage of the amount of traction you have, but if the reduction is too high then you'll break traction with the ground which isn't desirable.
Zack Glazer
McGill Baja Racing Alumnus 2009-2013 http://baja.mcgilleus.ca/
2012-2013 Drivetrain Designer
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.094 seconds.