Motorcycle Throttle Body Sensor Triangular Layout
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Solution Overview
Problem
Conventional air intake devices for two-wheeled motor vehicles face challenges in reducing the axial dimension of the throttle body and making the sensor housing compact due to the placement of air intake pressure and temperature sensors, which hinder weight reduction and compactness.
Innovation Solution
The sensors are positioned on the apexes of a triangle centered on the valve shaft axis, with the air intake pressure sensor's detection hole and passage configured to prevent foreign matter entry, and the throttle sensor is aligned with the valve shaft axis to concentrate sensors upstream, allowing for a more compact design and reduced axial length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the air intake pressure sensor is disposed downstream of the valve shaft in the sensor housing, then the sensor can detect air intake pressure accurately, but the dimension of the throttle body cannot be reduced in the axial direction
Solution Approach 1:
The patent applies dimensional repositioning by moving the air intake pressure sensor from the downstream side to the upstream side of the valve shaft, and arranging both sensors (temperature and pressure) on apexes of a triangle in the upstream region. This spatial reconfiguration in the upstream dimension allows the throttle body axial length to be reduced while maintaining accurate pressure detection capability.
Solution Approach 2:
The patent merges the placement of multiple sensors (air intake temperature sensor and air intake pressure sensor) into a concentrated upstream region defined by triangular apexes. This consolidation of sensor positions in the upstream area eliminates the need for downstream sensor placement, enabling throttle body compactness while integrating multiple sensing functions in a coordinated manner.
2Measurement precision
If the air intake temperature sensor and air intake pressure sensor are disposed distributed between upstream and downstream sides of the air intake path with the valve shaft as border, then each sensor can be positioned for optimal detection, but the sensor housing cannot be made compact
Solution Approach 1:
The patent transitions from a distributed linear arrangement of sensors across the valve shaft to a triangular spatial configuration positioned entirely in the upstream region. By defining sensor positions as apexes of a triangle in the upstream area, the design achieves compact sensor housing volume while preserving detection accuracy through optimized positioning within this triangular geometry.
Solution Approach 2:
The patent combines both air intake temperature sensor and air intake pressure sensor placements into the upstream region, eliminating the downstream placement. This merging of sensor locations into a single upstream triangular configuration reduces sensor housing volume while maintaining the functional detection capabilities of both sensors through their coordinated positions at the triangle apexes.
Data Source
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AI summary
An air intake device for an engine for a two-wheeled motor vehicle is provided in which a throttle sensor (18), an air intake temperature sensor (19) and an air intake pressure sensor (20) are disposed so that the centers thereof are positioned on apexes of a triangle (35) on a sensor housing (17) further upstream in an air intake path (2) than an axis (Y) of a valve shaft (5a), the air intake pressure sensor (20) is disposed so that the center thereof is on the uppermost apex of the triangle (35), the throttle sensor (18), and the air intake temperature sensor (19) and the air intake pressure sensor (20) are disposed in a concentrated manner further upstream in the air intake path (2) than the axis (Y) of the valve shaft (5a) in the sensor housing (17). Thus, it becomes possible to reduce the axial length of the throttle body (1) further downstream in the air intake path (2) than the valve shaft (5 a) without interfering with the air intake pressure sensor (19) in particular, and it also becomes possible to make the throttle body (1) compact, lighten the weight, and at the same time make the sensor housing compact (17).