Throttle Device Vertical Arrangement Miniaturization
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Solution Overview
Problem
Conventional throttle devices for multi-cylinder engines face challenges in miniaturization and flexibility due to the concentration of gears, sensors, and motors, which limits the compactness and vertical arrangement freedom, necessitating wider intake passage intervals.
Innovation Solution
A throttle device design where the rotation transmission mechanism, including a first and second transmission member, and the position sensor are positioned between throttle bodies, allowing the position sensor to detect the second transmission member's displacement without protruding outside the throttle body width, thereby reducing the overall device width and enhancing arrangement flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the position sensor and rotation transmission mechanism are arranged on the center side of the throttle body, then the overall width of the throttle body can be prevented from increasing, but the interval between the two intake passages at the center must be widened
Solution Approach 1:
The patent transitions from horizontal arrangement (on the center side) to vertical arrangement (between throttle bodies in the thickness direction). This dimensional change allows the position sensor and rotation transmission mechanism to be positioned without increasing the throttle body width or requiring wider intake passage intervals, as they are now arranged in the thickness direction between the first and second throttle bodies
2Length of stationary object
If the position sensor and rotation transmission mechanism are concentratedly arranged on the center side, then the throttle body width can be controlled, but the degree of freedom of arrangement in the vertical direction is limited
Solution Approach 1:
The patent utilizes the thickness direction (vertical dimension) between the first and second throttle bodies as a new arrangement space. This provides additional degrees of freedom for positioning the position sensor and rotation transmission mechanism, enabling more flexible mounting configurations on two-wheeled vehicles without being constrained to the horizontal plane
3Adaptability or versatility
If the position sensor protrudes outside the throttle body width range, then the arrangement flexibility is maintained, but the throttle device cannot be miniaturized
Solution Approach 1:
The patent nests the position sensor and rotation transmission mechanism within the thickness direction between the first and second throttle bodies. This nesting arrangement allows the components to be contained within the overall throttle body envelope without protruding outward, achieving miniaturization while maintaining functional flexibility through vertical positioning
Data Source
AI summary
A throttle device, comprising: a throttle valve (13) disposed in a plurality of intake passages (12) of a throttle body (11); a throttle shaft (14) supporting the throttle valve (13); a motor (15) for driving the throttle valve (13) to open and close through the throttle shaft (14); a rotation transmission mechanism (20) interposed between the motor (15) and the throttle shaft (14); and a position sensor to detect a displacement in the rotation transmission mechanism (20). The rotation transmission mechanism (20) includes a pinion (21) driven by the motor (15) and a control gear (23) interlocked with the pinion (21) and integrally connected to the throttle shaft (14). The position sensor (30) to detect an angular displacement of the control gear (23) and the rotation transmission mechanism (20) are disposed between the plurality of intake passages 12.