Working Vehicle Automatic Mode Switching by Pump Pressure
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Solution Overview
Problem
Existing working vehicles face issues with fuel consumption inefficiency due to manual switching between economy and standard modes, leading to wasteful energy consumption when large work power is required, and increased fuel consumption when operating in standard mode.
Innovation Solution
A working vehicle system that automatically switches between economy and standard modes based on hydraulic pump discharge pressure and engine load factors, using a vehicle-controller to transmit control commands to an ECU for optimal mode selection, eliminating the need for manual operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the working vehicle operates in economy mode to suppress fuel consumption, then fuel consumption is reduced, but when large work power is required, the operator must manually switch to standard mode, increasing operational complexity
Solution Approach 1:
The vehicle controller automatically monitors hydraulic pump discharge pressure and engine load factor to determine when mode switching is needed, eliminating the need for operator intervention. The system serves itself by detecting work conditions and autonomously selecting between economy and standard modes.
Solution Approach 2:
The system continuously monitors discharge pressure from the hydraulic pump and engine load factor, using this feedback to dynamically adjust operating mode. When discharge pressure reaches a reference value or engine load factor exceeds a threshold, the system automatically switches from economy to standard mode.
2Power
If the working vehicle continues to operate in standard mode, then sufficient work power is maintained, but energy is consumed wastefully, increasing fuel consumption
Solution Approach 1:
The operating mode is dynamically adjusted based on real-time work conditions rather than remaining fixed. The system transitions between economy and standard modes according to the actual power demands detected through hydraulic pressure and engine load monitoring, optimizing energy usage.
Solution Approach 2:
The system changes operational parameters by switching between different control modes (economy vs. standard) based on monitored conditions. When discharge pressure or engine load factor exceeds thresholds, the control parameters are changed to standard mode; otherwise, economy mode parameters are applied.
3Use of energy by moving object
If the operator manually switches between standard mode and economy mode, then fuel consumption can be optimized, but operational complexity and troublesomeness increase
Solution Approach 1:
The vehicle controller autonomously manages mode switching without requiring operator input. It self-determines when to transition between economy and standard modes based on monitored hydraulic pressure and engine load, completely eliminating the manual switching operation.
Solution Approach 2:
The vehicle controller acts as an intermediary between the operator and the engine control unit. It receives operational data, processes it according to predetermined conditions, and automatically sends appropriate control commands to the ECU, shielding the operator from complex mode switching operations.
Data Source
AI summary
A working vehicle includes an engine, a first hydraulic pump, a second hydraulic pump, a travel unit, a working unit, an operation unit, an ECU and a vehicle-controller. The vehicle-controller transmits a control command of a standard mode to the ECU when the travel unit stopped and a first period is elapsed, with a discharge pressure from the hydraulic pump being equal to or higher than a reference value, an engine load factor being equal to or higher than a predetermined upper limit, the vehicle-controller transmits the control command of the economy mode to the ECU when a second period is elapsed, with the engine load factor being equal to or lower than a predetermined lower limit, and the vehicle-controller transmits the control command of the standard mode to the ECU when the travel unit is operated.