Hybrid Work Vehicle Powertrain Control for Maximum Efficiency
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Solution Overview
Problem
Existing work vehicles, such as tractors, face inefficiencies in their powertrain systems, leading to high fuel consumption due to operating points that maximize internal combustion engine efficiency but not overall vehicle efficiency.
Innovation Solution
A control method for a work vehicle that optimizes the powertrain assembly by determining an operating point that maximizes overall efficiency, incorporating a hybrid-electric drivetrain with an electric generator and motor, energy storage, and an electronic control unit to manage energy distribution and storage, ensuring efficient operation across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a hybrid architecture is implemented to optimize overall efficiency, then device complexity increases, but this may lead to higher fuel consumption if not properly managed
Solution Approach 1:
The electronic control unit acts as an intermediary that coordinates the complex interactions between the internal combustion engine, hybrid electric drivetrain components, and energy storage systems. By centralizing control and using intelligent algorithms, the system manages the complexity of the hybrid architecture while achieving optimized overall efficiency, preventing the system from becoming unmanageable despite increased component count.
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 method allows the powertrain to operate at maximum efficiency, reducing fuel consumption and managing excess power for storage, thereby improving the vehicle's overall efficiency and fuel economy.
Implementation Method 1
an electric generator and motor in a hybrid-electric configuration
Implementation Method 2
an electric generator and motor in a hybrid-electric configuration
Implementation Method 3
energy storage, and an electronic control unit to manage energy distribution and storage
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
There is described a method for controlling a work vehicle (1) comprising: a body movable on the ground by means of a plurality of ground-engaging means (5); and a powertrain assembly (3) carried by said body and comprising an internal combustion engine (6) and a drivetrain assembly (8) operatively interposed between said internal combustion engine (6) and said ground-engaging means (5); the method comprising the steps of: • receiving a request to operate said powertrain assembly (3) to provide at output a useful power (Pi); • determining the operating point (Q1) of said powertrain assembly (3) wherein said powertrain assembly (3) is able to provide at output said useful power (Pi) and at the same time has the maximum efficiency, and • controlling said powertrain assembly (3) to operate at the operating point (Q1) determined in step b).