Intake control device for internal combustion engine
US5315975A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1993 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Apr 5, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D9/104
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An intake control device for an internal combustion engine having a body member 1 and a throttle valve 5 disposed within an air passage 4 . The external circular edge of the throttle valve 5 is divided, with a throttle shaft 6 into a first edge portion 5a which moves toward the upstream side of the air passage 4 and a second edge portion 5b which moves toward the downstream side of the air passage 4. On an inner wall 7 of the air passage 4 of the body member 1 are formed an upstream-side spherical wall surface 8 in a position facing the first edge portion 5a and a downstream-side spherical wall surface 9 in a position facing the second edge portion 5b. A first clearance 13 formed between the first edge portion 5a and the upstream-side spherical wall surface 8 is smaller than a second clearance 14 formed between the second edge portion 5b and the downstream-side spherical wall surface; the second edge portion 5b of the throttle valve 5 may not come into contact with the downstream-side spherical wall surface 9 even when a high intake manifold vacuum is built on the downstream side of the throttle valve 5 when the throttle valve 5 is in a position for closing the air passage 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.