System and method for improving vehicle performance on grade
First Claim
1. In a vehicle having a front, rear, left side and right side, a system for improving vehicle performance on a surface oriented at a grade, said system comprising:
- an engine;
a global positioning system for calculating data representing an acceleration of the vehicle;
an acceleration sensor for sensing a sum of acceleration due to vehicle acceleration along the grade and a component of gravity along the grade and providing data based on the sensed sum;
a controller for determining the grade using the data from the global positioning system and the data from the acceleration sensor, calculating a dynamic weight shift of the vehicle from a first wheel to a second wheel due to the vehicle acceleration, calculating a static weight shift of the vehicle from the first wheel to the second wheel due to the gravity and the grade, and determining a maximum amount of torque that can be transmitted by the first wheel before the first wheel slips; and
a torque transfer device for adjusting an amount of torque sent to each of the first and second wheels, whereby slipping of the first wheel is avoided by the controller preemptively by diverting torque from the first wheel to the second wheel through the torque transfer device so that an amount of torque sent to the first wheel is less than the maximum amount of torque.
1 Assignment
0 Petitions
Accused Products
Abstract
A system and method for improving vehicle performance on a grade comprises an engine, an acceleration sensor, a global positioning system, a controller and a torque transfer device. The controller determines the grade from information obtained from the global positioning system and the acceleration sensor. The controller calculates a dynamic weight shift of the vehicle from a first wheel to a second wheel due to acceleration and a static weight shift of the vehicle from the first wheel to the second wheel due to gravity and the grade. The controller then determines the maximum amount of torque that can be transmitted to the first wheel before the first wheel slips and avoids slipping by preemptively diverting torque from the first wheel to the second wheel before the first wheel slips.
-
Citations
20 Claims
-
1. In a vehicle having a front, rear, left side and right side, a system for improving vehicle performance on a surface oriented at a grade, said system comprising:
-
an engine; a global positioning system for calculating data representing an acceleration of the vehicle; an acceleration sensor for sensing a sum of acceleration due to vehicle acceleration along the grade and a component of gravity along the grade and providing data based on the sensed sum; a controller for determining the grade using the data from the global positioning system and the data from the acceleration sensor, calculating a dynamic weight shift of the vehicle from a first wheel to a second wheel due to the vehicle acceleration, calculating a static weight shift of the vehicle from the first wheel to the second wheel due to the gravity and the grade, and determining a maximum amount of torque that can be transmitted by the first wheel before the first wheel slips; and a torque transfer device for adjusting an amount of torque sent to each of the first and second wheels, whereby slipping of the first wheel is avoided by the controller preemptively by diverting torque from the first wheel to the second wheel through the torque transfer device so that an amount of torque sent to the first wheel is less than the maximum amount of torque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A method of controlling torque distribution between first and second wheels of a vehicle on a surface having a grade comprising:
-
obtaining information about the vehicle from a global positioning system; sensing an acceleration of the vehicle using the information obtained from both the global positioning system and an acceleration sensor; calculating a dynamic weight shift of the vehicle from a first wheel to a second wheel due to the acceleration; calculating the grade of the surface utilizing the information obtained from both the global positioning system and the acceleration sensor; calculating a static weight shift of the vehicle due to gravity and the grade; determining a maximum amount of torque that can be transmitted to the first wheel before the first wheel slips; and preemptively diverting torque from the first wheel through a torque transfer device to the second wheel to avoid slipping of the first wheel. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification