Variable valve operating apparatus for internal combustion engine
US8186318B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Jan 31, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2820/031
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
To provide a variable valve operating apparatus for an internal combustion engine which can reduce a range where heat treatment is required, thereby favorably suppressing distortion which occurs in a camshaft during heat treatment, to a low level. A changeover mechanism is provided which includes a slide pin which is adapted to move within a predetermined reciprocating range thereby switching between operational states of a variable mechanism, and a guide rail provided in an outer peripheral surface of the camshaft and guides the movement of the slide pin from one end to a remaining end of the reciprocating range. A projection part which is engageable with the guide rail is provided in the slide pin. Restriction means which performs at least one of a restriction of contact between a top surface of the projection part and a bottom surface of the guide rail opposing the projection part, and a restriction of movement of the slide pin beyond a distance from the above-described one end to the above-described remaining end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.