Hybrid Vehicle Drive Planning for Preset Motor-Only Route Sections
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Solution Overview
Problem
Hybrid electric vehicles may fail to appropriately travel in the motor mode in preset travel sections, such as areas around the user's home or hospital, due to combining consecutive travel sections based on predetermined conditions.
Innovation Solution
The vehicle includes an engine, motor, energy storage device, and control device that acquires travel section information from map data, combines consecutive sections based on predetermined conditions, and creates a drive assistance plan to ensure motor mode travel in specific sections without combining them, using a hybrid electronic control unit (HECU) to manage engine and motor operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If consecutive travel sections are combined based on predetermined conditions, then the drive assistance plan can be simplified and processing efficiency is improved, but the vehicle may fail to appropriately travel in motor mode in preset travel sections
Solution Approach 1:
The travel route is segmented into multiple travel sections, and the control device processes each section individually to determine whether it is a preset motor mode travel section. This segmentation allows the system to apply different combining rules to different sections, ensuring that preset motor mode sections are not incorrectly combined while still allowing other sections to be combined for processing efficiency.
Solution Approach 2:
Different combining rules are applied to different travel sections based on their characteristics. Preset motor mode travel sections are excluded from combining, while other sections can be combined based on predetermined conditions. This local differentiation ensures that the reliability of motor mode travel is maintained in critical sections while preserving processing efficiency in other sections.
2Device complexity
If preset motor travel sections are combined with other travel sections, then the overall route processing is simplified, but the vehicle cannot appropriately travel in motor mode in those preset sections
Solution Approach 1:
The control device identifies and flags preset motor mode travel sections before performing the combining operation. By performing this preliminary identification, the system can then apply specific combining rules that prevent the merging of preset sections with other sections, ensuring that motor mode operation reliability is maintained while still simplifying the processing of non-preset sections.
Solution Approach 2:
Instead of combining all travel sections and then trying to preserve motor mode sections, the system inverts the approach by first identifying preset motor mode sections and then explicitly excluding them from combining. This inverted logic ensures that motor mode operation reliability is prioritized while still achieving route processing simplification for other sections.
Data Source
AI summary
The control device of hybrid electric vehicle acquires the plan based on the map information and the own vehicle position or the information for each travel section in the estimated traveling route, and combining the continuous travel section based on the predetermined condition, and creates a drive assistance plan on whether the vehicle travels in the motor drive mode or the normal drive mode based on the information of the combined travel sections. When the travel sections in the travel route include a predetermined motor travel section in which the hybrid electric vehicle is supposed to perform the motor driving, the control device creates the drive assistance plan without combining the predetermined motor travel section.