Intake Temperature Sensor Positioning for Off-Road Vehicle Accuracy
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Solution Overview
Problem
Intake temperature sensors in off-road straddle-type vehicles are challenged by heat interference from engines, leading to inaccurate temperature readings and susceptibility to damage from debris and environmental factors during rough terrain travel.
Innovation Solution
The intake temperature sensor is positioned forwardly of the upper rear end of the front fork, protected by a sensor protective part such as a Zeichen plate, which keeps it away from heat sources and debris, allowing for accurate atmospheric temperature detection without the need for correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the intake temperature sensor is arranged in the vicinity of the throttle body to measure air quantity accurately, then the measurement precision is improved, but the sensor is exposed to heat from the engine and exhaust system causing temperature detection errors
Solution Approach 1:
The patent relocates the intake temperature sensor from the conventional position near the throttle body to a new spatial dimension - specifically, forwardly of the upper rear end of the front fork. This dimensional relocation places the sensor in a region where air flows directly from the front of the vehicle, away from heat-generating components, thereby solving the temperature interference problem while maintaining measurement capability
2Measurement precision
If the intake temperature sensor is kept away from heat generating sources to avoid temperature correction, then the temperature detection accuracy is improved, but the sensor becomes exposed to mud, water, pebbles, and debris causing damage
Solution Approach 1:
The patent introduces a protective structure (such as azeichen plate or fairing) that acts as an intermediary between the intake temperature sensor and harmful environmental factors. This mediator shields the sensor from mud, water, pebbles, and debris while allowing air flow to reach the sensor, thus protecting the sensor without compromising its exposure to atmospheric air for accurate temperature detection
3Reliability
If the intake temperature sensor is positioned in a high location to avoid debris, then the reliability is improved, but the sensor may be exposed to travel wind affecting temperature measurement
Solution Approach 1:
The patent creates a localized protective environment around the sensor by positioning it forwardly of the upper rear end of the front fork, where a specific air flow pattern exists. The protective structure (zeichen plate or fairing) is designed to manage local air flow characteristics, allowing atmospheric air to reach the sensor while blocking harmful debris, thus achieving both protection and accurate measurement through localized quality control
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 precise air temperature measurement while protecting the sensor from damage, eliminating the need for temperature correction and reducing exposure to heat and debris, thus ensuring reliable operation in harsh off-road conditions.
Implementation Method 1
an intake temperature sensor that detects temperature of air sucked into an engine
Data Source
AI summary
A straddle-type vehicle that exactly detects temperature of air sucked into the engine while protecting an intake temperature sensor of a fuel injector from damage. A front fork supports a front wheel rotatably. An engine is arranged rearward of the front fork to produce a driving force. A Zeichen plate protects the intake temperature sensor. The intake temperature sensor is arranged forwardly of an upper rear end of the front fork, and the Zeichen plate is arranged forwardly of the intake temperature sensor.