Shielding Element With Integrated Electrical Heating
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Solution Overview
Problem
Existing shielding parts for internal combustion engine exhaust systems primarily focus on thermal and acoustic insulation, but they lack the ability to actively heat specific areas, which is necessary for effective catalytic converter operation during cold starts and meeting emission limits.
Innovation Solution
Incorporating an electrical heating system within the shielding part, featuring a resistance conductor with a meandering course and electrical insulation, allowing for targeted heating of pipe sections up to 550°C, integrated into the thermal insulation and fixed using sewing or stapling, with switchable heating cascades for precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an electrical heating system is integrated into the shielding part, then the ability to actively heat specific pipe sections is improved, but the device complexity increases
Solution Approach 1:
The heating system is integrated directly into the shielding part structure, merging the thermal insulation function with the active heating function in a single component. The resistance conductor is embedded within the thermal insulation material of the shielding part, eliminating the need for separate heating apparatus and reducing overall system complexity despite adding heating capability.
Solution Approach 2:
The shielding part is transformed into a multi-functional component that simultaneously provides thermal insulation, acoustic damping, and active heating capabilities. This universal design allows a single component to perform multiple functions that would traditionally require separate devices, thereby improving versatility without proportionally increasing complexity.
2Manufacturing precision
If a resistance conductor with meandering course is used, then heat distribution homogeneity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The resistance conductor is configured with a meandering course pattern that changes its spatial arrangement to optimize heat distribution. By varying the conductor's path geometry rather than using a simple linear or spiral configuration, the design achieves more uniform thermal distribution across the pipe surface while maintaining manufacturability through standardized routing patterns.
3Ease of operation
If the shielding part is designed as segmented sections, then ease of assembly is improved, but the number of components increases
Solution Approach 1:
The shielding part is divided into multiple sections that can be assembled around the pipe in a step-by-step manner. Each section contains a portion of the heating system and thermal insulation, allowing for easier installation and positioning while maintaining the integrated functionality of heating and insulation across the entire pipe section.
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 solution enables efficient heating of exhaust gas to support catalytic converter operation, meeting emission standards by providing a compact, easily assembled, and thermally insulated shielding part that can be retrofitted, maintaining structural integrity and reducing noise pollution.
Implementation Method 1
the heating system is designed as a resistance conductor that is electrically insulated from the profile and is provided with a meandering pattern extending over a length
Implementation Method 2
the heating system is fixed in or on a thermal insulation of the shielding part
Data Source
Figure 1~4
Figure 2~3
AI summary
The invention relates to a shielding element (2) which comprises at least two sub-pieces (4, 5) which are designed to be connected together in a linearly abutting manner on at least one separation surface (6) in order to surround a three-dimensionally shaped profiled section or tubular part (R) of an exhaust line (1) of an internal combustion engine over a length when in use. The aim of the invention is to develop a shielding element of the aforementioned type with additional positive properties, thereby increasing the effect of the shielding element. This is achieved in that each of the sub-pieces (4, 5) of the shielding element (2) comprises at least one electric heating system (3) which thermally faces the tubular part (R) to be surrounded in an installed position.