Exhaust Gas Sensor Installation in Collecting Pipe
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Solution Overview
Problem
The existing installation structure of exhaust gas sensors in straddle-type vehicles, where two exhaust pipes are connected to a single collecting pipe, results in inaccurate detection of exhaust gas components from one pipe due to the sensor's proximity, leading to biased detection and reduced accuracy.
Innovation Solution
The exhaust gas sensor is installed in a collecting pipe where the outlets of the two exhaust pipes are adjacent to each other, positioned orthogonally to their adjacent direction in a sectional view, allowing for even detection of exhaust gas components from both pipes without the need for individual sensors on each pipe, thus improving detection accuracy and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the exhaust gas sensor is installed close to one of the two exhaust pipes in the collecting pipe, then the installation structure is simple, but the detection accuracy of exhaust gas from the other exhaust pipe deteriorates
Solution Approach 1:
The patent applies dimensional positioning by installing the exhaust gas sensor at a specific location in the collecting pipe that is distant from both exhaust pipe outlets in a direction orthogonal to the direction where the outlets are adjacent. This spatial arrangement in multiple dimensions ensures the sensor detects exhaust gas from both pipes equally without being biased toward one pipe, thereby resolving the contradiction between simple installation and accurate detection.
2Measurement precision
If the exhaust gas sensor is installed at a position distant from both exhaust pipes in the collecting pipe, then the detection accuracy of exhaust gas from both pipes is improved, but the installation complexity increases
Solution Approach 1:
The patent specifies a precise installation position using orthogonal directional relationships: the sensor is placed distant from both exhaust pipe outlets in a direction orthogonal to the direction where the outlets are adjacent to each other in a sectional view. This dimensional specification provides a clear, reproducible installation guideline that maintains detection accuracy while avoiding unnecessary installation complexity.
Data Source
AI summary
An installation structure of an exhaust gas sensor includes: two exhaust pipes on a downstream side of a multi-cylinder engine; a collecting pipe configured to collect the two exhaust pipes; and an exhaust gas sensor installed in the collecting pipe. Outlets of the two exhaust pipes are connected to the collecting pipe so as to be adjacent to each other. In the collecting pipe, the exhaust gas sensor is installed at a position away from the outlets of the two exhaust pipes in a direction orthogonal to a direction in which the outlets of the two exhaust pipes are adjacent to each other in a sectional view.