Master Control Unit Torque Distribution for Hybrid Drive Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern drive systems in hybrid vehicles face challenges in coordinating multiple control units due to increased computing power requirements, leading to potential errors and reduced driving comfort, particularly when individual drive units cannot achieve their assigned target torques under varying conditions.
Innovation Solution
A method where a master control unit calculates a total target torque and divides it among drive units, considering threshold torques determined by each unit's control units, allowing for redistribution of torque differences to ensure all units operate within their capabilities, thereby maintaining system performance and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple control units are used to handle computing power requirements, then the system can manage complex drive coordination, but coordination errors increase and driving comfort decreases
Solution Approach 1:
A torque interface is introduced as an intermediary component between the master control unit and slave control units. This torque interface centrally calculates and distributes target torques to individual drive units, acting as a mediator that coordinates the multiple control units and prevents coordination errors while maintaining the necessary computing power distribution.
Solution Approach 2:
The system implements feedback mechanisms where actual torques of drive units are determined and fed back to the torque interface. This feedback loop enables the torque interface to compare actual torques with target torques and adjust distributions accordingly, ensuring accurate coordination among multiple control units and maintaining driving comfort.
2Productivity
If target torque is assigned to each drive unit without considering individual capabilities, then total torque target is achieved, but individual units cannot achieve their assigned torque under varying conditions
Solution Approach 1:
The torque interface dynamically changes the target torque parameters assigned to each drive unit based on their individual capabilities and current operating conditions. Instead of fixed torque assignments, the system continuously adjusts target torques to match actual drive unit capabilities, ensuring both total torque targets are met and individual units can achieve their assigned values.
Solution Approach 2:
The system implements dynamic torque distribution where the torque interface continuously adapts target torque assignments to changing operating conditions. This dynamic approach allows the system to maintain optimal torque delivery accuracy by adjusting individual unit targets in real-time based on their current capabilities, while still achieving the overall torque objective.
3Reliability
If one drive unit reduces torque production due to threshold limitations, then that unit operates within safe limits, but overall system performance deteriorates
Solution Approach 1:
When one drive unit reduces its torque production due to threshold limitations, the torque interface compensates by increasing the target torque assigned to other available drive units. This counterbalancing approach ensures that the total torque output is maintained despite individual unit limitations, while still keeping each unit operating within its safe operational thresholds.
Data Source
AI summary
The invention relates to a method for controlling a drive system with at least two drive units (20), each of which is paired with at least one control unit (22), wherein —a total target torque (30) is calculated by means of a master control unit (22a), —the total target torque (30) is divided into respective individual target torques (32) for each of the drive units (20) by the master control unit (22a), and —the drive units (20) are actuated by the paired control units (22) on the basis of the corresponding individual target torques (32). The invention is characterized in that the threshold torques (34) corresponding to the drive units (20) are ascertained and taken into consideration by the master control unit (22a) when dividing the total target torque (30).