Hybrid Power Transmission Mechanism for Engine and Motor Control
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Solution Overview
Problem
Existing hybrid vehicle power systems face inefficiencies in power transmission and control, particularly in combining the outputs of internal combustion engines, motors, and generators to optimize energy use and reduce exhaust emissions.
Innovation Solution
A power system comprising an internal combustion engine, a motor, a generator, a power transmission mechanism, and a control apparatus that allows for flexible power transmission from any or all of these sources to a driven load, with the control apparatus performing specific control processes to optimize power usage and reduce engine operation when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the internal combustion engine operates continuously to provide power, then the power delivery capability is maintained, but exhaust emissions increase and energy efficiency decreases
Solution Approach 1:
The system dynamically switches between series hybrid drive mode (engine generates electricity, motor drives vehicle) and parallel hybrid drive mode (both engine and motor drive vehicle), allowing the internal combustion engine to operate only when necessary for optimal efficiency and emission reduction while maintaining power delivery capability through motor assistance or direct engine drive.
Solution Approach 2:
The power transmission mechanism is designed to universally transmit power from any combination of power generation sources (internal combustion engine, motor, generator) to the driven load, enabling flexible operation modes including series hybrid drive, parallel hybrid drive, and engine-only drive, thus reducing engine operation time and emissions while maintaining adequate power delivery.
2Power
If the motor and generator operate simultaneously to provide power, then the power delivery capability increases, but the risk of overheating increases
Solution Approach 1:
The control apparatus continuously monitors the operating states of the motor and generator, including temperature parameters, and adjusts their operation accordingly. When temperatures approach critical levels, the control system reduces the power output or switches to alternative power sources, preventing overheating while maintaining optimal power delivery capability during normal operation.
3Adaptability or versatility
If the power transmission mechanism is designed to transmit power from all three sources simultaneously, then the versatility of power delivery is improved, but the device complexity increases
Solution Approach 1:
The power transmission mechanism is segmented into separate transmission paths for the internal combustion engine, motor, and generator, with selective engagement capabilities. This allows the system to transmit power from individual sources or combinations of sources independently, providing versatility while avoiding the need for a single complex integrated transmission system that would handle all power combinations simultaneously.
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 enables efficient power transmission to a driven load, reduces exhaust emissions by minimizing internal combustion engine operation, and prevents overheating of the motor and generator, while maintaining high power delivery capabilities.
Implementation Method 1
a motor 3 capable of performing power running
Implementation Method 2
a generator 4 capable of performing power generating operation
Implementation Method 3
an internal combustion engine 2
Data Source
AI summary
A power system includes: an internal combustion engine; a motor to perform power running; a generator to perform power generating operation and the power running; a power transmission mechanism via which the internal combustion engine, the motor, and the generator are connected to drive a driven load by at least one of the internal combustion engine, the motor, and the generator and to perform power transmission between the internal combustion engine and the generator; and a processor configured to perform a first control process to control the motor to perform the power running so that the driven load is driven only by the motor and to perform a second control process to control both the motor and the generator to perform the power running so that the driven load is driven by both of the motor and the generator.