Vehicle Heater Catalytic Converter Spacer for Low-Complexity Assembly
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Solution Overview
Problem
Existing heating devices for vehicles face challenges in flexibly and cost-effectively integrating catalytically active components, particularly due to the complexity and cost of positioning catalytic converters close to the exhaust gas outlet, which requires complex forming steps and welding or soldering processes.
Innovation Solution
A heating device design that includes a catalytic converter element positioned between the burner flange and heat exchanger, with a spacer fitted onto the burner flange to fix the catalytic converter in a defined position near the exhaust gas outlet, eliminating the need for complex material bonding and allowing for a force-fit or form-fit fixation, thereby simplifying assembly and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If catalytic converter is positioned close to exhaust gas outlet for optimal exhaust gas temperatures, then catalytic efficiency is improved, but device complexity and manufacturing cost increase due to complex forming steps and welding or soldering processes
Solution Approach 1:
The heating device is divided into modular components: burner device, heat exchanger, and catalytic converter assembly. The catalytic converter is positioned in the exhaust gas flow between the burner device and heat exchanger, allowing independent assembly and positioning without complex integration into the main structure.
Solution Approach 2:
The catalytic converter serves as an intermediary component in the exhaust gas flow path, positioned between the burner device and heat exchanger. This intermediary positioning allows optimal exposure to hot exhaust gases for catalytic conversion of CO and HC without requiring complex welding or forming operations.
2Strength
If material bonding (welding or soldering) is used to attach components, then structural strength is improved, but manufacturing time and flexibility are reduced
Solution Approach 1:
Traditional material bonding methods (welding or soldering) are replaced with a mechanical retention system using a retention ring and retention spring. The glow plug is retained in the connecting member through these mechanical means, eliminating the need for thermal bonding processes and significantly reducing assembly time and complexity.
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 design enables efficient, low-emission, and quiet operation of the heating device by optimizing the position of the catalytic converter for optimal exhaust gas temperatures and flow characteristics, while reducing production complexity and costs.
Implementation Method 1
The catalytic converter element (22) is suitable for converting CO and HC contained in the combustion exhaust gases leaving the combustion chamber to CO2 and H2O in a catalytic reaction.
Implementation Method 2
The catalytic converter element (22) is suitable for converting CO and HC contained in the combustion exhaust gases leaving the combustion chamber to CO2 and H2O in a catalytic reaction.
Implementation Method 3
a heat exchanger for heating a fluid in a flushable volume of the heating device
Implementation Method 4
a heat exchanger for heating a fluid in a flushable volume of the heating device
Data Source
AI summary
The invention relates to a heating device, preferably a fuel-operated heating device for a vehicle, comprising the following: a heat exchanger for heating a fluid in a heating device volume through which flow can pass; a burner device, which has a burner flange, the burner device being disposed within the heat exchanger; and an exhaust gas outlet for discharging exhaust gases from the heating device; a catalytic converter element, which is disposed between the burner flange and the heat exchanger; a spacer which can be attached to the burner flange and which has a height with respect to an exhaust gas flow direction in order to at least one of: position and fix the catalytic converter element in a predefined position near the exhaust gas outlet.