Hybrid PTO Control System for Seamless Power Source Transition
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Solution Overview
Problem
Hybrid-electric drivetrains often fail to provide sufficient power to power take off (PTO) systems, necessitating the shutdown of PTO operations to start the internal combustion engine for power or battery recharging, which disrupts vehicle functionality and efficiency.
Innovation Solution
A system comprising an internal combustion engine, hybrid-electric motor and generator, a power take off mechanism, a hybrid control module, and an engaging mechanism that allows seamless transition between hybrid-electric and internal combustion engine power sources for the PTO, enabling dynamic power allocation based on load requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the PTO is powered by the hybrid-electric drivetrain, then fuel efficiency is improved, but power sufficiency deteriorates when high power is required
Solution Approach 1:
The system dynamically switches between hybrid-electric drivetrain operation and internal combustion engine operation based on real-time power demands. The control system monitors PTO power requirements and automatically transitions power sources, allowing the system to operate in fuel-efficient hybrid mode during low-power tasks while switching to full-engine power when high power is needed, thus resolving the contradiction between fuel efficiency and power sufficiency.
2Power
If the PTO is stopped to start the internal combustion engine, then power sufficiency is improved, but operational continuity deteriorates
Solution Approach 1:
The control system performs preliminary assessment of power requirements before PTO operation begins. When high power is anticipated or required, the system proactively starts the internal combustion engine before PTO engagement, eliminating the need to stop PTO operation to start the engine. This preliminary action ensures both power sufficiency and operational continuity are maintained.
3Power
If the internal combustion engine is used to power the PTO, then power sufficiency is improved, but fuel consumption increases
Solution Approach 1:
The system changes operational parameters by dynamically adjusting the power source based on PTO load requirements. During low-power PTO operations, the system operates in hybrid-electric mode with the internal combustion engine off, minimizing fuel consumption. When power demands increase beyond hybrid-capable thresholds, the system transitions to full engine operation, optimizing the balance between power sufficiency and fuel consumption through parameter-based decision making.
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
Enables efficient power distribution to PTO systems, reducing fuel consumption by utilizing hybrid-electric power for light-duty tasks and switching to internal combustion engine for high-power demands, ensuring continuous operation of PTO accessories without constant engine runtime.
Implementation Method 1
a hybrid-electric motor and generator couples to the internal combustion engine. The power take off mechanism receives torque from at least one of the internal combustion engine and the hybrid-electric motor and generator
Implementation Method 2
an internal combustion engine, a hybrid-electric motor and generator
Data Source
AI summary
A power take off system for a hybrid-electric vehicle comprises an internal combustion engine, a hybrid-electric motor and generator, a power take off mechanism, a hybrid control module, and an engaging mechanism. The hybrid-electric motor and generator couples to the internal combustion engine. The power take off mechanism couples to the internal combustion engine and the hybrid-electric motor and generator. The power take off mechanism receives torque from at least one of the internal combustion engine and the hybrid-electric motor and generator. The hybrid control module is disposed in electrical communication with an electronic system controller. The hybrid control module generates output signals for controlling the internal combustion engine. The engaging mechanism is disposed in electrical communication with the electronic system controller. The engaging mechanism has a first mode and a second mode. The power take off mechanism is decoupled from the internal combustion engine and the hybrid-electric motor and generator in response to an output signal generated by the electronic system controller.