Hybrid Vehicle Control Device Dynamic Schedule Reset
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Solution Overview
Problem
Conventional hybrid vehicle control devices struggle to maintain fuel efficiency when resetting the operating schedule as the remaining distance to the destination shortens, leading to increased fuel consumption and decreased battery power utilization.
Innovation Solution
A control device for hybrid vehicles that calculates a projected driving route and sets a target battery charge amount, adjusting the operating schedule of the internal combustion engine and rotary electrical machine based on the remaining distance to the destination, allowing for dynamic resetting of the schedule to optimize fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the operating schedule is reset using a fixed threshold value, then the battery charge deviation can be corrected, but the fuel efficiency deteriorates when the remaining distance is short
Solution Approach 1:
The reset request value is made dynamic by adjusting it according to the remaining distance to the destination. When the remaining distance is long, a larger reset request value is used, while when the remaining distance is short, a smaller reset request value is used. This dynamic adjustment allows the system to maintain reliability in correcting battery charge deviation while preventing fuel efficiency deterioration in short-distance scenarios.
Solution Approach 2:
The threshold parameter (reset request value) is changed based on the remaining distance condition. Instead of using a fixed threshold value, the system varies the reset request value according to the remaining distance, thereby optimizing the balance between correcting battery charge deviation and maintaining fuel efficiency under different operating conditions.
2Reliability
If the operating schedule is reset frequently to correct battery charge deviation, then the target charge amount can be maintained, but the degree of freedom for optimization decreases
Solution Approach 1:
The reset request value parameter is adjusted based on remaining distance to control the frequency and timing of operating schedule resets. By making this parameter variable rather than fixed, the system can maintain target charge amount reliability while preserving optimization flexibility under different distance conditions.
Solution Approach 2:
The system dynamically adapts the reset condition based on remaining distance, allowing greater optimization freedom when distance is long and more conservative reset behavior when distance is short, thereby maintaining both reliability and adaptability.
Data Source
AI summary
A control device for a vehicle comprises a projected driving route calculating part calculating a projected driving route up to a destination, a target charge amount setting part setting a target amount of charge of the battery at each point on the projected driving route, an operating schedule setting part setting the operating schedule of the internal combustion engine and rotary electrical machine so that the amount of charge of the battery becomes the target amount of charge, and an operating schedule resetting part resetting an operating schedule when the difference between the amount of charge of the battery and the target amount of charge becomes a reset request value or more. The operating schedule resetting part is configured so as to reduce the reset request value when the remaining distance on the projected driving route is short compared to when it is long.