Lateral Exhaust Pipe Routing for Sensor Placement and Ground Clearance
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Solution Overview
Problem
The arrangement of exhaust gas sensors in vehicle exhaust systems is restricted by other components, making it difficult to achieve accurate detection of exhaust gas components, particularly in off-road motorcycles with large-capacity expansion chambers, which limits the positioning of sensors and affects detection accuracy.
Innovation Solution
The exhaust pipe is routed along the lateral side of the engine, with the catalytic device positioned in the middle and exhaust gas sensors placed on both upstream and downstream sides of the catalytic device, allowing for effective detection without impairing the detection accuracy and optimizing space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the exhaust pipe is routed through the middle of the engine to accommodate a large-capacity expansion chamber, then the expansion space is maximized for improved output, but the arrangement space for exhaust gas sensors is severely restricted
Solution Approach 1:
The exhaust pipe is routed from the front side of the engine to the lateral side, changing the spatial dimension of the exhaust flow path. This dimensional change creates available space on the lateral side for sensor arrangement, resolving the conflict between expansion chamber volume and sensor arrangement complexity
2Measurement precision
If exhaust gas sensors are arranged in restricted spaces, then the overall vehicle structure is maintained, but the detection accuracy of exhaust gas components is impaired
Solution Approach 1:
By routing the exhaust pipe to the lateral side of the engine, the patent creates a new spatial dimension for sensor arrangement. This allows sensors to be positioned in locations that provide adequate detection accuracy while maintaining overall vehicle structural constraints
3Reliability
If the catalytic device is positioned centrally in the exhaust pipe, then exhaust gas purification is optimized, but the device may be grounded during off-road travel
Solution Approach 1:
The exhaust pipe extending to the lateral side positions the catalytic device away from the ground level, eliminating the grounding issue during off-road travel while maintaining effective exhaust gas purification through proper catalytic converter placement
4Length of moving object
If the exhaust pipe extends rearward from the lateral side, then space clearance and ground height are maintained for improved mobility, but the exhaust flow path length increases
Solution Approach 1:
The exhaust pipe is designed with flexible routing that extends rearward from the lateral side, dynamically adapting to vehicle movement and terrain variations. This maintains adequate clearance and ground height for mobility while managing exhaust flow path length through optimized pipe configuration
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 configuration enables accurate detection of exhaust gas components, enhances exhaust gas purification performance, and improves vehicle mobility by maintaining sufficient clearance and ground height, while preventing the catalytic device from being grounded during off-road travel.
Implementation Method 1
a catalytic device that purifies exhaust gas flowing through the exhaust flow path
Implementation Method 2
a first exhaust gas sensor that detects a predetermined component in the exhaust gas
Data Source
AI summary
An arrangement structure of an exhaust gas sensor includes an exhaust pipe that extends from an engine for a vehicle to form a part of an exhaust flow path, a catalytic device that purifies exhaust gas flowing through the exhaust flow path, and a first exhaust gas sensor that detects a predetermined component in the exhaust gas. The exhaust pipe is led out from a front side of the engine to one side in a left-right direction of the engine, and extends rearward so as to be routed on a lateral side of the engine. The catalytic device is arranged in the middle of the exhaust pipe on the lateral side of the engine. The first exhaust gas sensor is arranged on the lateral side of the engine and on an upstream side or a downstream side of the catalytic device in the exhaust pipe.