Crank Angle Sensor Heat Shield with Airflow Deflection
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Solution Overview
Problem
Existing systems fail to adequately protect crank angle sensors from heat sources that can cause electrical components to overheat, leading to potential damage and malfunction.
Innovation Solution
A protective system comprising a protective member with a heat insulating member spaced from the sensor and an airflow deflecting member that directs air to cool the sensor, preventing heat transfer and maintaining a cool environment around the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the crank angle sensor is positioned near the exhaust manifold or other heat sources to reduce the number of parts, then device complexity is reduced, but the sensor temperature increases causing electrical components to overheat
Solution Approach 1:
The protective cover is divided into distinct functional segments: a main cover body providing physical protection, a heat insulating member (such as a heat shield or insulating material) specifically positioned between the sensor and heat sources, and integrated airflow paths. This segmentation allows each component to address specific protection needs without requiring entirely separate systems.
Solution Approach 2:
A heat insulating member is introduced as an intermediary element positioned between the crank angle sensor and the exhaust manifold or other heat sources. This intermediary blocks thermal transfer while allowing the sensor to remain in its protective integrated housing, thus reducing device complexity without compromising thermal protection.
2Temperature
If a protective cover is added to shield the crank angle sensor from heat sources, then the sensor is protected from overheating, but the device complexity and number of parts increase
Solution Approach 1:
The protective cover is merged with the sensor housing or mounting structure to form an integrated assembly. The heat insulating member is integrated into the cover structure rather than being a separate component. Airflow deflecting features are incorporated directly into the cover geometry. This merging reduces the number of discrete parts while maintaining comprehensive protection functionality.
Solution Approach 2:
The protective cover is designed to perform multiple functions simultaneously: physical protection of the sensor, thermal insulation from heat sources, airflow management to maintain cooling, and structural integration with existing engine components. This multi-functionality eliminates the need for separate dedicated components for each protection aspect.
3Temperature
If heat insulating material is placed between the protective member and heat source, then heat transfer to the sensor is reduced, but the device complexity increases
Solution Approach 1:
A thin heat insulating film or shield is used between the protective cover and the heat source. This thin-film approach provides effective thermal blocking while minimizing space requirements and structural complexity. The insulating material can be applied as a coating, thin sheet, or integrated layer within the cover structure rather than requiring thick insulating barriers.
4Temperature
If airflow is directed to cool the sensor, then the sensor operates at lower temperature, but additional components are required
Solution Approach 1:
The protective cover incorporates integrated airflow deflecting features that utilize existing engine airflow patterns to cool the sensor. The cover geometry itself directs airflow across the sensor housing without requiring external fans, blowers, or separate cooling systems. The structure serves its own cooling needs through clever geometric design.
Solution Approach 2:
Airflow cooling is achieved by utilizing the three-dimensional space around the sensor and the vertical dimension of airflow movement. The protective cover creates airflow channels and deflects air from above, below, or surrounding areas to reach the sensor. This spatial approach to cooling avoids the need for additional active cooling components.
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
Effectively protects the crank angle sensor from overheating by maintaining a cool air environment, reducing the risk of electrical component damage and ensuring reliable operation.
Implementation Method 1
a heat insulating member substantially spaced from the protective member; and where the heat insulating member is disposed between the protective member and a heat source
Implementation Method 2
an airflow deflecting member associated with the protective member; and where the airflow deflecting member is configured to direct air into the interior portion of the protective member and thereby cool the portion of the sensor disposed within the interior portion
Data Source
AI summary
A system for protecting a crank angle sensor is disclosed. The system includes a protective member, a heat insulating member and an airflow deflecting member. The heat insulating member insulates against heat from adjacent heat sources. The airflow deflecting member directs driving wind into an interior portion of the protective member to cool the air adjacent to a portion of the crank angle sensor. The protective member also includes holes to receive the driving wind directed from the airflow deflecting member.