Arduino Relay and timer Project

Hello

I am new to Arduino and would be very great full for some help with a project that I am working on. I basically have a go cart type device that I want to be able to use with an Arduino for different control purposes.

Currently the brains behind this go cart is Yiyun-Model # YK43 1000w 36v motor controller with the throttle directly connected to the controller. I want to add the Arduino to this circuit by connecting the throttle to the Arduino instead of the Yiyun YK43 then have the Arduino route the throttle signal to the YK43 to control the motor.

The reason why I am trying to do this is because I want to be able to have the Arduino limit the max throttle output signal to the YK43 after a certain time period. I want to be able to set the time limit to either 30 to 60mins etc. When the set time is reached I want the Arduino to limit the max signal being sent out by 30- 50% for example and after another time period have the signal limit dropped again.

this means that if the throttle is set to 100% Arduino will be limiting the output signal to the controller based on what the Arduino is limiting. I want to to be able to control the time limit with buttons if possible and have a LCD showing how much time is left until the throttle limit drops.
Do you guys think its doable just looking for items I might need and code recommendations.

Thanks in Advanced

Wade W

mrjamrock2012:
Yiyun-Model # YK43 1000w 36v motor controller with the throttle directly connected to the controller

You need to understand the interface between the throttle and the motor controller in electrical/electronic terms. What sort of interface does the Arduino need to provide to the throttle? What sort of interface does it need to provide to the motor controller?