Throttle Valve Stopper Layout for Compact Opening Control
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Solution Overview
Problem
Existing throttle devices are either oversized due to separate full-close and full-open control mechanisms or lack a compact fully opened opening control mechanism, leading to a need for improved designs that can be downsized while maintaining effective control.
Innovation Solution
A throttle device with a cylindrical spring guide featuring full-close and full-open stoppers arranged with a gap, and fully closed and fully opened opening regulation members that allow for compact control mechanisms between the spring guide and throttle shaft, utilizing a coil spring and electronic control to manage the throttle valve's opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate full-close and full-open control mechanisms are provided on the outer circumferential side of the throttle gear, then both fully closed and fully opened opening control functions are achieved, but the device size increases
Solution Approach 1:
The patent combines both full-close and full-open control functions into a single integrated mechanism located between the spring guide and throttle shaft. The opening regulation member integrates both the full-close abutment and full-open abutment functions, eliminating the need for separate control mechanisms on the outer circumferential side of the throttle gear, thereby reducing device size while maintaining complete opening control functionality
Solution Approach 2:
The patent relocates the control mechanism from the outer circumferential side of the throttle gear to the radial space between the spring guide and throttle shaft. This dimensional repositioning allows the control mechanism to utilize previously unused radial space, achieving compact integration of both full-close and full-open control functions without increasing the overall device footprint
2Volume of stationary object
If control mechanisms are integrated between the spring guide and throttle shaft, then device size is reduced, but control precision may be compromised
Solution Approach 1:
The opening regulation member features locally optimized abutment surfaces with precise geometries tailored for their specific functions. The full-close abutment and full-open abutment have distinct local characteristics that ensure precise control at each extreme position, maintaining high control precision despite the compact integrated arrangement between the spring guide and throttle shaft
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 design enables a compact throttle device that effectively controls intake passage opening and closing, reducing size and production costs by integrating control mechanisms and eliminating the need for additional outer circumferential parts, thus achieving downsizing while maintaining operational efficiency.
Implementation Method 1
a coil spring interposed between the throttle body and the rotor
Data Source
AI summary
A throttle device includes a throttle body, a throttle valve, a throttle shaft, a throttle gear, and a coil spring. A cylindrical spring guide disposed in the coil spring is provided on the throttle body. A full-close stopper and a full-open stopper arranged at a prescribed interval in a circumferential direction are provided on the spring guide. A fully closed opening regulation lever includes a full-close abutment configured to abut against the full-close stopper and full-open abutment configured to abut against the full-open stopper.