Vehicle Driving Force Control Mode Selection
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Solution Overview
Problem
Existing vehicle driving force control systems fail to simultaneously provide fuel-efficient and powerful driving characteristics, leading to a compromise between the two, which does not satisfy diverse driver preferences and results in suboptimal performance in varying driving conditions.
Innovation Solution
A driving force control device that allows selection and temporary switching between multiple driving modes, each with distinct characteristics, using a mode selection control, temporary changeover mode setting, and driving force indication values based on the selected mode and driving state, enabling drivers to choose the preferred driving force characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a map is automatically selected based on driving region to control throttle opening degree, then fuel efficiency is improved during low-speed traveling, but acceleration performance deteriorates during high-speed traveling
Solution Approach 1:
The system dynamically switches between automatic map selection mode and manual mode selection mode based on driver input. The throttle opening degree control transitions from fully automatic to manually selectable modes, allowing the driver to choose between fuel-efficient and powerful driving characteristics as needed.
Solution Approach 2:
The system changes the control parameter from automatic map-based throttle control to manual mode selection with distinct driving force characteristics. By introducing multiple selectable modes (fuel-efficient mode and powerful mode), the system allows parameter adjustment to match different driving conditions and preferences.
2Use of energy by moving object
If engine power is suppressed for fuel-efficient driving, then fuel consumption is reduced, but acceleration capability deteriorates
Solution Approach 1:
The system provides dynamic switching between fuel-efficient mode with suppressed power and powerful mode with full acceleration capability. The driver can transition between these dynamic states based on immediate driving needs, such as when passing other vehicles or responding to traffic conditions.
Solution Approach 2:
The system implements distinct driving force characteristics through parameter changes in the control maps. The fuel-efficient mode uses a map that suppresses throttle opening degree to reduce fuel consumption, while the powerful mode uses a map that allows full throttle response for maximum acceleration capability.
3Power
If a vehicle is configured for powerful driving force characteristic, then acceleration performance is improved, but fuel efficiency deteriorates
Solution Approach 1:
The system makes a single vehicle universal by incorporating multiple driving force characteristics that can be selected based on driving conditions. The vehicle can function as both a fuel-efficient vehicle and a powerful performance vehicle depending on the selected mode, eliminating the need for separate vehicles for different driving preferences.
Solution Approach 2:
The system uses parameter changes in the control maps to provide distinct driving force characteristics. By switching between different maps (fuel-efficient map and powerful map), the vehicle's fundamental parameters are adjusted to deliver either fuel efficiency or acceleration performance as required.
4Adaptability or versatility
If multiple driving force characteristics are provided, then driver preferences are satisfied, but device complexity increases
Solution Approach 1:
The system achieves multi-functionality by integrating multiple driving force characteristics into a single control system. Rather than requiring separate systems for different driving modes, the invention provides a unified controller that can switch between fuel-efficient and powerful characteristics, simplifying the overall vehicle configuration while satisfying diverse driver preferences.
Solution Approach 2:
The system manages complexity by using parameter changes in software-based control maps rather than requiring complex hardware modifications. The multiple driving force characteristics are achieved through different control parameters and maps within the existing electronically controlled throttle system, avoiding additional mechanical linkages or complex actuation mechanisms.
Data Source
AI summary
A driving force control device can set driving force characteristics which conform to tastes of drivers using one vehicle thus giving the easy-to-drive feeling to the drivers. An E/G13ECU possesses three modes 1 to 3 as control modes and selects one mode from these modes based on a manipulation input using a mode selection switch. Further, any one of the mode out of these modes 1 to 3 is preset in the E/G13ECU as a temporary changeover mode, and the E/G13ECU changes over a mode selected by the mode selection switch and the preset temporary changeover mode alternatively by the temporary changeover switch.