Enhanced throttle control

1. A throttle control system for a vehicle, the throttle control system comprising:

a suspension sensor operable to detect suspension amplitudes of a suspension system of the vehicle;

a grade sensor operable to detect an angular position of the vehicle;

a selection switch operable to set an operating mode of the vehicle to one of a first operating mode and a second operating mode, wherein said first operating mode is a four-wheel drive low mode and said second operating mode is one of a two-wheel drive mode and a four-wheel drive high mode; and

a controller receiving first operational data from said suspension sensor, second operational data from said grade sensor, and said operating mode of the vehicle, said controller determining if the vehicle is operating in said first operating mode or said second operating mode;

said controller controlling a throttle opening of the vehicle proportional to a position of an accelerator based on determining that the vehicle is operating in said second operating mode; and

said controller determing if said first or second operational data is beyond a predetermined threshold based on determining that the vehicle is operating in said first operating mode, and said controller then controlling said throttle opening to reduce said throttle opening to an amount less than proportional to said position of said accelerator based on said first operational data and said second operational data in response to determining that said first or second operational data is beyond the predetermined threshold and only after determining said vehicle Is operating in said first operating mode.

2. The throttle control system of claim 1 , further comprising a speed sensor associated with a non-driven wheel of the vehicle.

3. The throttle control system of claim 2 , wherein said speed sensor provides a signal to said controller indicative of a speed of said non-driven wheel.

4. The throttle control system of claim 3 , wherein said controller uses said received speed signal from said speed sensor in controlling said throttle.

5. The throttle control system of claim 1 , further comprising a brake system having a series of brakes associated with wheels of the vehicle.

6. The throttle control system of claim 5 , wherein said brake system is an anti-lock brake system selectively supplying pulsations to said brakes at a predetermined duty cycle based on driving conditions.

7. The throttle control system of claim 6 , wherein said duty cycle is supplied to said controller.

8. The throttle control system of claim 6 , wherein said duty cycle is used by said controller in controlling said throttle.

9. The throttle control system of claim 1 , further comprising a roll sensor in communication with said controller, said roll sensor configured to detect a tilt of the vehicle and provide a signal indicative of said detected tilt to said controller, said controller configured to control said throttle opening based on said tilt signal when said vehicle is determined to be operating in said first operating mode.

10. The throttle control system of claim 1 , further comprising a position sensor associated with said selection switch, said position sensor providing said controller with said operating mode of a vehicle.

11. The throttle control system of claim 1 , wherein said selection switch sets said operating mode of the vehicle based on an at least one of a manual input and a speed of a wheel of the vehicle.

12. The throttle control system of claim 11 , further comprising a speed sensor sensing a speed of said wheel.

13. The throttle control system of claim 11 , wherein said wheel is a non-driven wheel.

14. The throttle control system of claim 13 , wherein said controller automatically sets said operating mode of said vehicle to said first operating mode when said controller determines via said speed sensor that said non-driven wheel is rotating at a lower rotational speed than a driven wheel.

15. The throttle control system of claim 9 , wherein when said controller determines the vehicle is operating in said first operating mode, said controller then determines if said first and second operational data and said signal from said roll sensor are each beyond a predetermined threshold, and upon such determination, said controller controls said throttle opening to reduce said throttle opening to an amount less than proportional to said position of said accelerator based on said first operational data, said second operational data and said signal from said roll sensor.