Active Grille Shutter Fault Detection for Missing Vanes
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Solution Overview
Problem
Current diagnostic methods for active aerodynamic systems, such as active grille shutters, lack effectiveness in monitoring and ensuring proper functionality, which affects aerodynamic efficiency and fuel efficiency in internal combustion engine vehicles and range in electric vehicles.
Innovation Solution
Incorporating a modified frame design with spring-like features that remain out of the way of vane motion when all vanes are present but bind when any vane is missing, allowing the system to sense operational faults and lock in a safe position if an error is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional diagnostic methods are used for active grille shutters, then the system structure remains simple, but the ability to detect faults and ensure proper functionality is insufficient
Solution Approach 1:
The system uses the existing actuator motor to drive the diagnostic process without requiring external diagnostic equipment. The motor attempts to rotate the vanes, and the spring features automatically detect binding conditions caused by missing vanes, enabling self-diagnosis through the system's own operational components
Solution Approach 2:
Spring features are introduced as intermediary elements between the actuator and the vanes. These springs normally remain compressed and out of the way during operation, but when a vane is missing causing binding, the springs extend to contact the actuator motor, transmitting the fault condition signal without requiring direct complex sensing mechanisms
2Reliability
If no diagnostic mechanism is implemented, then the device complexity is low, but the aerodynamic efficiency and fuel efficiency cannot be guaranteed
Solution Approach 1:
The system establishes a feedback loop where the actuator motor's operational status is monitored through the spring features. When binding is detected due to missing vanes, the motor current changes or the motor fails to complete rotation, providing feedback about the vane configuration status to ensure aerodynamic performance
Solution Approach 2:
The spring features are pre-positioned and pre-compressed during normal operation, ready to immediately detect binding conditions. This preliminary preparation allows for instant fault detection without requiring additional sensors or complex diagnostic procedures when vanes are missing
3Reliability
If the system operates without vane presence verification, then the operation is simple, but the aerodynamic benefit is compromised
Solution Approach 1:
The system automatically verifies vane configuration through the spring-actuator interaction during normal operation. The springs and actuator motor work together to self-verify the presence and proper configuration of all vanes without requiring manual inspection or complex verification procedures
Solution Approach 2:
Spring features serve as intermediary elements that automatically indicate vane presence or absence. When all vanes are properly installed, the springs remain compressed and invisible. When a vane is missing, the corresponding spring extends to contact the actuator, automatically indicating the fault without requiring direct observation or complex detection mechanisms
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 the system to reliably detect missing vanes, prevent further rotation, and alert operators, ensuring optimal aerodynamic performance and preventing overheating by locking the mechanism at a partially open position for cooling purposes.
Implementation Method 1
spring-like features that remain out of the way of vane motion when all vanes are present but bind when any vane is missing
Data Source
AI summary
An active grill shutter assembly incorporating at least one locking mechanism in the case where a vane component is missing to improve the ability of an actuator to sense damage within the active aerodynamic system. This functionality may be achieved by including these features within the frame as an integral component, or it may be added as a separate component.