Electronically controlled throttle control apparatus
US6986336B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2005 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Mar 15, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2009/0294
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electronically controlled throttle control apparatus prevents a throttle valve from malfunctioning due to deterioration in sliding resistance ascribable to abrasive dust at a sliding contact portion between a valve gear of a geared reduction device and a coil spring. The outer periphery of a spring inner periphery guide is provided with a plurality of groove portions as abrasive dust removing means for removing abrasive dust at least from a sliding contact portion between the outer periphery of the spring inner periphery guide and the inner periphery of a default spring, so that individual edge portions of the plurality of groove portions can rub the inner periphery of the default spring to scrape off abrasive dust from the inner periphery of the default spring and direct the abrasive dust into the plurality of groove portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.