Multi-purpose Vehicle Mode Control for Torque and Emission Trade-off
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Solution Overview
Problem
Conventional multi-purpose vehicles face high environmental load and fuel consumption due to engine exhaust and power requirements, necessitating a reduction in both.
Innovation Solution
A multi-purpose vehicle configuration featuring an engine and motor as power sources for different wheels, with a mode change switch allowing operation in two-wheel engine driving, two-wheel motor driving, four-wheel hybrid, and OFF modes, enabling efficient power usage based on need.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the engine is used as the power source for both first and second travel apparatuses, then sufficient travel torque is ensured, but environmental load and fuel consumption increase due to engine exhaust
Solution Approach 1:
The power transmission system is segmented into two independent paths: one from the engine to the first travel apparatuses, and another from the motor to the second travel apparatuses. This allows selective engagement of either power source or both simultaneously, enabling the vehicle to use only the motor for low-torque situations, thereby reducing environmental load and fuel consumption while maintaining sufficient travel torque when needed
Solution Approach 2:
The vehicle is designed with multi-functionality by incorporating both engine and motor as power sources that can operate independently or together. The mode control device enables the vehicle to switch between different operating modes (engine-only, motor-only, or combined), making the power system adaptable to various driving conditions and reducing the need for constant engine operation
2Power
If the engine is continuously operated to ensure sufficient power, then travel performance is maintained, but fuel consumption and emissions increase
Solution Approach 1:
The power transmission system incorporates dynamic switching capability through the mode control device, which allows the vehicle to transition between different power sources and modes based on real-time driving conditions. This dynamic adaptation enables the system to use the motor for low-power requirements and switch to the engine or combined mode when higher power is needed, optimizing fuel consumption while maintaining travel performance
3Adaptability or versatility
If a mode change switch is provided to allow mode selection, then operational flexibility is improved, but device complexity increases
Solution Approach 1:
The mode control device is designed to provide multiple operating modes (two-wheel engine driving mode, two-wheel motor driving mode, and four-wheel hybrid driving mode) through a unified control system. This multi-functional approach allows the vehicle to adapt to different driving conditions while using a single integrated control mechanism, balancing operational flexibility with manageable system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces environmental load and fuel consumption by allowing mode selection to optimize power usage, ensuring sufficient torque while minimizing engine usage and emissions.
Implementation Method 1
a battery that provides driving electric power to the motor
Data Source
AI summary
A multi-purpose vehicle is disclosed that includes a mode change switch for operating a travel mode of a vehicle body and a mode control device for switching the travel mode of the vehicle body in response to an operation of the mode change switch. The mode control device switches the travel mode of the vehicle body between a two-wheel engine driving mode in which only an engine is driven, a two-wheel motor driving mode in which only a motor is driven, a four-wheel hybrid driving mode in which both of the engine and the motor are driven, and an OFF-mode in which none of the engine and the motor is driven.