Variable-valve-actuation apparatus for internal combustion engine
US6390041B2 · kind B2 · utility
28Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2305/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A VVA apparatus includes an operating mechanism that changes a valve-lift amount, and a microcomputer-based controller that controls the operating mechanism to change the valve-lift amount in accordance with engine operating conditions. A first portion of the valve-lift amount between a high lift and a low lift is changed continuously, and a second portion of the valve-lift amount between the low lift and zero lift is changed with one of the low lift and zero lift selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.