Vehicle Thermoelectric Generator with Adaptive Exhaust Routing
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Solution Overview
Problem
Existing vehicle thermoelectric generation systems face inefficiencies in fuel economy due to limited electricity generation and high costs, as well as degraded coolant warming effects when sequentially arranged with exhaust heat recovery systems.
Innovation Solution
A thermoelectric generator for vehicles that includes a heat exchange unit, a thermoelectric generation unit, and a driving unit with valves to selectively route exhaust gas through different passages based on driving modes, allowing for adaptive heat exchange and electricity generation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If exhaust gas is sequentially arranged through thermoelectric generation system and exhaust heat recovery system, then electricity can be generated, but coolant warming effect is degraded
Solution Approach 1:
The patent implements dynamic switching between different heat exchange modes (first, second, and third modes) through controllable valves. The system can dynamically route exhaust gas through different passages based on operational requirements, allowing optimization between electricity generation and coolant warming effects in different driving conditions.
Solution Approach 2:
The patent divides the heat exchange system into multiple independent passages (first flow passage for heat exchange, second flow passage for thermoelectric generation, third flow passage for bypass). This segmentation allows selective activation of different paths, enabling the system to prioritize either electricity generation or coolant warming based on operational needs.
2Loss of energy
If thermoelectric element is used to generate electricity from exhaust heat, then fuel economy is improved, but manufacturing cost increases due to expensive thermoelectric element
Solution Approach 1:
The patent designs a system where the exhaust heat recovery system serves multiple functions: it can perform direct heat exchange to warm coolant, enable thermoelectric electricity generation, or allow bypass flow. This multi-functionality reduces reliance on expensive dedicated thermoelectric components while maintaining fuel economy benefits through flexible operational modes.
Solution Approach 2:
The patent changes operational parameters by switching between different heat exchange modes (first, second, third modes) controlled by valves. This allows the system to optimize performance based on driving conditions without requiring expensive thermoelectric elements, achieving fuel economy improvement through controlled heat recovery rather than costly electricity generation.
3Loss of energy
If exhaust heat recovery system is used to warm coolant, then fuel economy is enhanced during engine start, but exhaust gas is bypassed under other conditions reducing system efficiency
Solution Approach 1:
The patent implements dynamic valve control to switch between different operational modes. During engine start, the system can prioritize coolant warming through the first flow passage. Under other conditions, it can switch to the second or third flow passages to maintain system efficiency, preventing exhaust gas bypass while optimizing for different operational requirements.
Solution Approach 2:
The patent changes the operational parameters of the exhaust heat recovery system by controlling valve positions to select different flow paths. This allows the system to adapt its behavior based on driving conditions, maintaining high efficiency across different operational states rather than being fixed in a single mode.
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
Enhances fuel economy by optimizing heat exchange and electricity generation based on driving modes, reducing manufacturing costs through single motor operation of valves, and improving coolant warming efficiency.
Implementation Method 1
a thermoelectric generation unit for converting thermal energy of the exhaust gas into electrical energy
Implementation Method 2
a heat exchange unit, through which a coolant to exchange heat with the exhaust gas circulates
Data Source
AI summary
A thermoelectric generator for a vehicle utilizing heat of exhaust gas discharged from an engine of the vehicle includes a heat exchange unit, through which a coolant circulates, a thermoelectric generation unit for converting thermal energy of exhaust gas into electrical energy, a first flow passage for guiding the exhaust gas to pass through the heat exchange unit, a second flow passage for guiding the exhaust gas to pass through the thermoelectric generation unit, a third flow passage for guiding the exhaust gas to bypass the heat exchange unit and the thermoelectric generation unit without passing therethrough, a first valve for opening or closing the first flow passage, a second valve for selectively opening or closing the second flow passage and the third flow passage, and a driving unit for operating the first valve and the second valve by a single power source.