Hybrid Traction Chain Control for Delayed Engine Start-Up
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Solution Overview
Problem
Existing hybrid vehicle energy management systems lack consistency and repeatability under similar conditions, leading to uncontrolled motor switching and inefficient energy use.
Innovation Solution
A method for controlling the traction chain of a hybrid vehicle that blocks the start request for the thermal engine until specific conditions of distance traveled and vehicle speed are met, with parameters like battery charge level and driving mode influencing these conditions, ensuring consistent and repeatable performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a predictive energy management system uses various parameters from driving history to predict future driving cycles and optimally manage engine activation, then energy management optimization is improved, but the system complexity increases and repeatability under similar conditions deteriorates
Solution Approach 1:
The control method segments the complex energy management decision-making process into distinct phases: an initial phase where thermal engine starting is blocked regardless of other conditions, and a subsequent phase where normal parameter-based control applies. This segmentation simplifies the overall system logic while maintaining optimization capabilities.
Solution Approach 2:
The system performs a preliminary action by blocking thermal engine starts during an initial period after vehicle startup, before other control parameters are evaluated. This preliminary blocking action establishes a consistent baseline behavior that improves repeatability, after which normal predictive control based on driving history parameters resumes.
2Loss of energy
If the thermal engine is started and stopped based on multiple parameters to optimize energy management, then energy efficiency is improved, but the repeatability and controllability of engine management deteriorates
Solution Approach 1:
The control logic is segmented into a mandatory initial blocking period followed by parameter-based thermal engine control. This segmentation ensures that the first phase behavior is always identical under similar conditions (improving repeatability), while the second phase allows for optimized energy management based on multiple parameters.
Solution Approach 2:
A preliminary blocking action is applied to thermal engine starting requests during the initial period after vehicle startup. This preliminary action creates a consistent, repeatable behavior pattern that is independent of other varying parameters, establishing reliability before transitioning to optimized parameter-based control.
3Adaptability or versatility
If the vehicle management system allows thermal engine starting based on multiple dynamic parameters, then adaptability to different driving conditions is improved, but consistency and repeatability of vehicle operation deteriorates
Solution Approach 1:
The vehicle operation is segmented into an initial consistent phase with blocked thermal engine starting, followed by an adaptive phase where thermal engine control responds to multiple parameters. This segmentation ensures consistency during the critical initial startup period while maintaining adaptability for ongoing operation.
Solution Approach 2:
The system applies a preliminary action of blocking thermal engine starts during the initial period, establishing a consistent operational baseline. This preliminary consistent behavior is maintained regardless of other parameters, ensuring repeatability during vehicle startup while allowing adaptability to emerge in subsequent operation.
Data Source
Figure 1~5
AI summary
The invention relates to a method for controlling the traction chain of a hybrid vehicle, comprising a heat engine and an electric machine, said method comprising the action of emitting a request to start the heat engine according to a plurality of parameters. The action of emission of a request to start the heat engine is blocked (20) from the moment of the start-up (18) of the vehicle, said blockage (20) being lifted (24) when a certain distance D is covered and/or a speed V of the vehicle is reached (22), after the moment of said start-up (18). The invention also relates to a hybrid vehicle implementing said method.