US4522029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system of exhaust for internal combustion engine
Assignee: Honda Motor Co Ltd
•
Filing: 1983-12-20
•
Granted: 1985-06-11
•
Expires: 2003-12-20
Abstract
Abstract Exhaust system control apparatus for internal combustion engine having an exhaust line and a branch line thereon, and an opening and closing valve on said branch line adapted to open when the engine operates at low speed and to close when the engine operates at high speed. The ratio between the cross-sectional areas of the branch line and the exhaust line is about 0.6 to 0.8.
Inventors
- 👤 Takao Tomita
- 👤 Masahiro Akiba
- 👤 Hideki Toyota
- 👤 Yasuo Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:12
CPC Classifications
F; F02; F02B; F02B27/00; F02B27/04; F02B27/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
Exhaust system control apparatus for an internal combustion engine having an exhaust line, a sub-chamber, a branch line on said exhaust line connecting the latter to said sub-chamber, and an opening and closing valve located on said branch line, said valve being adapted to open when said engine operates at low speed and to close when said engine operates at high speed, the ratio between the cross-sectional areas of said branch line and said exhaust line being about 0.6 to 0.8.
Claim 2
Dependent Claim
81 words
Exhaust system control apparatus for an internal combustion engine having an exhaust line, a sub-chamber, a branch line on said exhaust line connecting the latter to said sub-chamber, and an opening and closing valve located on said branch line, said valve being adapted to open when said engine operates at low speed and to close when said engine operates at high speed, the ratio between the cross-sectional areas of said branch line and said exhaust line being about 0.6 to 0.8.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |