Method for deploying a torque reduction and torque limitation command through per wheel torque control of a controllable 4-wheel-drive system
First Claim
1. A method for deploying torque commands from a vehicle stability assist (VSA) control system to a four wheel drive system in a vehicle comprising the steps of:
- utilizing a firewall within a four wheel drive system electronic control unit to analyze torque commands sent from a vehicle stability assist electronic control unit to the four wheel drive electronic control unit;
integrating within the four wheel drive system electronic control unit the torque commands from the vehicle stability assist electronic control unit, when the vehicle control system is in operation, with torque commands independently generated by the four wheel drive electronic control unit;
generating resultant wheel torque commands to be provided to each individual wheel in the four wheel drive system;
wherein the commands sent from the vehicle stability assist control system are requests to limit wheel torques; and
further including the step of calculating a maximum torque release rate and when the operational status of the VSA changes from operational to non-operational, maintaining the rate of resultant torque change below the maximum torque release rate.
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Accused Products
Abstract
A method for deploying torque commands from a vehicle stability assist control system to a four wheel drive system in a vehicle that includes utilizing a firewall within a four wheel drive system electronic control unit to analyze commands sent from a vehicle stability assist electronic control unit to the four wheel drive electronic control unit. Additionally, the commands from the vehicle stability assist electronic control unit, when the vehicle control system is in operation, are integrated with commands independently generated by the four wheel drive electronic control unit, and resultant wheel torque commands are generated to be provided to each individual wheel in the four wheel drive system.
31 Citations
11 Claims
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1. A method for deploying torque commands from a vehicle stability assist (VSA) control system to a four wheel drive system in a vehicle comprising the steps of:
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utilizing a firewall within a four wheel drive system electronic control unit to analyze torque commands sent from a vehicle stability assist electronic control unit to the four wheel drive electronic control unit; integrating within the four wheel drive system electronic control unit the torque commands from the vehicle stability assist electronic control unit, when the vehicle control system is in operation, with torque commands independently generated by the four wheel drive electronic control unit; generating resultant wheel torque commands to be provided to each individual wheel in the four wheel drive system; wherein the commands sent from the vehicle stability assist control system are requests to limit wheel torques; and further including the step of calculating a maximum torque release rate and when the operational status of the VSA changes from operational to non-operational, maintaining the rate of resultant torque change below the maximum torque release rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for deploying torque commands from a vehicle stability assist (VSA) control system to a four wheel drive system in a vehicle comprising the steps of:
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utilizing a firewall within a four wheel drive system electronic control unit to analyze torque commands sent from a vehicle stability assist electronic control unit to the four wheel drive electronic control unit; integrating within the four wheel drive system electronic control unit the torque commands from the vehicle stability assist electronic control unit, when the vehicle control system is in operation, with torque commands independently generated by the four wheel drive electronic control unit; generating resultant wheel torque commands to be provided to each individual wheel in the four wheel drive system; wherein the commands sent from the vehicle stability assist control system are requests to reduce wheel torques; and
further including the step of calculating a maximum torque release rate and when the operational status of the VSA changes from operational to non-operational, maintaining the rate of resultant torque change below the maximum torque release rate. - View Dependent Claims (9, 10, 11)
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Specification