Vehicle Oxygen Sensor Bush Alignment via Intermediary Positioning
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Solution Overview
Problem
Existing oxygen sensors in vehicles face alignment issues due to improper assembly of the contact bush, leading to inaccurate oxygen concentration detection and signal transmission, especially under external impacts.
Innovation Solution
The oxygen sensor design includes a contact bush with an upper and lower bush, supported by a disc spring and positioning unit, ensuring the bush is centered within the sleeve, preventing movement and maintaining alignment through elastic support and positioning grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bush is used to support the contact terminal in the housing, then the sensor element is protected from movement due to external vibration or impact, but the bush may be assembled without being centered in the sleeve, causing misalignment of other parts within the sleeve
Solution Approach 1:
A positioning unit is introduced as an intermediary component between the contact bush and the sleeve. This positioning unit includes positioning protrusions that fit into positioning grooves on the contact bush, ensuring precise centering and alignment of the contact bush within the sleeve during assembly, thereby eliminating the misalignment problem while maintaining vibration protection
2Ease of manufacture
If the contact bush is loosely fitted in the sleeve, then assembly is easy, but the contact bush moves due to external impact, causing problems in detecting precise oxygen concentration and signal transmission
Solution Approach 1:
The positioning unit acts as a mediator that provides precise positioning of the contact bush within the sleeve. The positioning protrusions and grooves ensure that the contact bush is accurately centered, preventing movement that would affect detection precision, while still allowing for relatively easy assembly through the defined positioning interfaces
3Reliability
If the contact bush is tightly fixed in the sleeve, then movement due to external impact is prevented, but the assembly complexity increases and manufacturing difficulty rises
Solution Approach 1:
The positioning unit provides a standardized intermediary interface between the contact bush and sleeve. This interface uses simple positioning protrusions and grooves that guide the contact bush into precise alignment during assembly, achieving stable fixation against external impact without requiring complex assembly procedures or additional fastening 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 design stabilizes the contact bush within the sleeve, enhancing the accuracy of oxygen concentration detection and signal transmission while preventing displacement from external impacts, thus improving the durability and reliability of the oxygen sensor.
Implementation Method 1
a positioning unit coupled with the contact bush. The positioning unit may maintain a gap between a circumference of the contact bush and an inner side surface of the sleeve
Data Source
AI summary
The proposed technology relates to an oxygen sensor for a vehicle, the oxygen sensor including a housing, a sleeve coupled to the housing, a sensor element configured to determine an oxygen concentration and provided within an inner space defined by the housing and the sleeve, a contact terminal connected to the sensor element, a contact bush including an upper bush and a lower bush, and a positioning unit coupled with the contact bush and maintaining a gap between a circumference of the contact bush and an inner side surface of the sleeve. In particular, the contact bush is coupled with the sensor element and the terminal at the center of the sleeve, and movement due to external impact is prevented.