Motorcycle Exhaust Gas Sensor Shielding by Main Frame
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Solution Overview
Problem
On and off-road motorcycles face challenges in protecting exhaust gas sensors from flying stones and sprayed mud without increasing vehicle weight, as existing solutions either fail to consider lateral protection or require additional weighty protective covers.
Innovation Solution
The exhaust gas sensor is positioned and attached in a manner that it is shielded by the main frame and other structural components, such as the exhaust pipe and mud flap, ensuring protection against stones and mud from various directions without the need for a dedicated protective cover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective cover is installed to protect the exhaust gas sensor from flying stones and sprayed mud, then the sensor's reliability is improved, but the vehicle weight increases
Solution Approach 1:
The patent merges the protective function with existing structural components. The main frame's lateral extension serves dual purposes: structural support and sensor protection. The exhaust pipe's positioning and the mud flap work together to create a protective system without adding separate protective covers, thus protecting the sensor while maintaining lightweight design.
Solution Approach 2:
Existing structural components are given multiple functions. The main frame not only provides structural support but also shields the exhaust gas sensor from lateral impacts. The exhaust pipe serves both exhaust function and protective enclosure. The mud flap provides both mud protection and contributes to the overall protective shielding of the sensor assembly.
2Reliability
If the exhaust gas sensor is positioned to be shielded by the main frame, then protection against flying stones and sprayed mud is improved, but the device complexity increases
Solution Approach 1:
The protective function is merged into existing structural components rather than adding separate protective elements. The main frame's lateral extension, exhaust pipe positioning, and mud flap work together as an integrated protective system that utilizes already-present structural elements, avoiding the need for additional complex protective assemblies.
3Measurement precision
If the exhaust gas sensor is attached to the exhaust pipe, then the sensor's detection function is maintained, but the sensor becomes vulnerable to sprayed mud from lateral sides
Solution Approach 1:
The exhaust gas sensor is nested within the protective enclosure formed by the main frame, exhaust pipe, and mud flap. This nested arrangement allows the sensor to maintain its detection function while being shielded from sprayed mud. The sensor is positioned in the space enclosed by these structural components, creating a protective niche that preserves both detection capability and protection from harmful factors.
Data Source
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AI summary
The present invention relates to a vehicle, in particular a motorcycle (1), comprising a main frame (4) extending obliquely longitudinally of the vehicle; an engine (10) mounted to the main frame; an exhaust pipe (9) connected to the engine (10); and an exhaust gas sensor (25) attached to the exhaust pipe, wherein the exhaust gas sensor (25) is shielded by the main frame (4) on the outside thereof in a vehicle width direction.