Hybrid Drive Train Condition Monitoring Using Actuator Parameters
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Solution Overview
Problem
Existing methods for determining the condition of a hybrid drive train in motor vehicles produce an excessive number of conditions, leading to potential 'deadlock' situations and inefficiencies.
Innovation Solution
A method that uses pre-determined condition parameters from the actuating device, specifically three logical parameters, to reduce the number of actual conditions in a hybrid drive train, focusing on the engagement status of clutches between the combustion engine and electrical engine, and the flow of force to the output, resulting in eight distinct conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods are used to determine drive train conditions, then comprehensive monitoring is achieved, but the number of conditions increases to twelve causing complexity and potential deadlocks
Solution Approach 1:
The patent extracts only the essential condition parameters from the actuating device (clutch engagement status, combustion engine operation status, and force flow direction) to determine drive train conditions. This selective extraction reduces the number of conditions from twelve to eight while maintaining reliable monitoring by focusing on the most critical parameters that actually define the operational state.
Solution Approach 2:
The three logical parameters serve multiple functions simultaneously: they determine the current drive train condition, enable prediction of future conditions, support multiple operating functions (combustion engine operation, electrical engine operation, charging, discharging), and provide a unified basis for control decisions. This multi-functionality reduces the need for separate monitoring systems for each function.
2Measurement precision
If more condition parameters are monitored, then more accurate condition determination is achieved, but the likelihood of deadlock situations increases
Solution Approach 1:
The patent extracts only the three most essential and independent parameters from the actuating device that truly define drive train conditions. By removing redundant or less critical parameters, the system achieves sufficient measurement precision for accurate condition determination while eliminating the parameter combinations that could lead to deadlock situations.
Solution Approach 2:
The patent changes the parameter set from a traditional comprehensive monitoring approach to a streamlined set of three logical parameters. This parameter transformation maintains the ability to accurately determine all necessary drive train conditions while using a simpler parameter space that is less prone to contradictory states and deadlocks.
3Duration of action of moving object
If actual conditions are maintained longer, then operational continuity is improved, but outdated conditions may be used
Solution Approach 1:
The patent uses the determined actual conditions to predict future drive train conditions in advance. By performing this predictive action, the system can prepare for upcoming condition changes and update its state information proactively, ensuring that the maintained conditions remain accurate and relevant even during extended operation periods.
Solution Approach 2:
The system continuously monitors the three logical parameters and uses this feedback to update the actual drive train conditions. This feedback mechanism ensures that even when conditions are maintained for extended periods, the system can detect and respond to changes, preventing the use of outdated information by continuously validating the maintained conditions against current parameter readings.
Data Source
AI summary
A method for determining conditions of a hybrid drive train of a motor vehicle. The method determines, the actual conditions (1, 2, 3, 4, 5, 6, 7, 8) of the drive train from predetermined condition parameters of the actuating device of the hybrid control. The condition parameters include whether or not a flow of force is present between a combustion engine (VM) and an electrical engine (EM), whether or not the combustion engine (VM) is operating, and whether or not a flow of force to the output is present.