Vehicle Drive Control Device Adaptability
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Solution Overview
Problem
Conventional vehicle travel control devices require changing the driving force command calculation method when the target of the driving force command changes, which is inefficient for vehicles with different driving force sources.
Innovation Solution
A vehicle travel control device with a target acceleration computation section and a driving force computation section that includes adjustment, first conversion, second conversion, and output means, allowing the same driving force command calculation method to be used for different driving schemes by adjusting and converting the driving force commands based on predetermined ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the driving force command calculation method is changed to accommodate different driving schemes, then the control device can adapt to various driving force sources, but the device complexity increases
Solution Approach 1:
The control device is designed with a universal calculation method that can handle multiple driving schemes (engine-only, electric motor-only, hybrid) through a single integrated approach. The system uses conversion ratios and adjustment means that work across all driving configurations without requiring separate calculation methods for each scheme, thereby achieving multi-functionality while maintaining relatively simple device architecture.
Solution Approach 2:
The system manages different driving schemes by changing parameters (conversion ratios between driving force sources) rather than changing the fundamental calculation method. By adjusting these parameters based on the active driving scheme, the control device achieves adaptability without increasing structural complexity, as the same computational framework is used with different parameter values.
2Adaptability or versatility
If multiple conversion means are added to support different driving force sources, then the system can output commands for various rotation parts, but the device complexity increases
Solution Approach 1:
The patent merges the conversion functions for different driving force sources into a unified calculation framework. Instead of implementing separate conversion means for engine-to-wheel, electric motor-to-wheel, and hybrid conversions, the system uses a single set of conversion ratios that can be applied universally. This combining approach reduces the number of distinct conversion components while maintaining support for all driving schemes.
Data Source
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AI summary
Provided is a vehicle travel control device that outputs a driving force command requested for a target by a driving force source, to vehicles having different driving schemes without changing a driving force command calculation method even when the driving force command requested by the driving force source has a different target. The vehicle travel control device includes a target acceleration computation section for calculating a target acceleration in accordance with a calculated target vehicle speed and with a detected actual vehicle speed, and a driving force computation section for calculating a driving force command from the target acceleration and outputting the calculated driving force command. The driving force computation section outputs at least one of a plurality of driving force commands, which are converted by using a plurality of predetermined conversion ratios, in accordance with a connected driving force source.