Patent US4993225A successfully refreshed from Google Patents.
US4993225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two cycle engine vapor emission control
Assignee: Motors Liquidation Co
•
Filing: 1989-06-21
•
Granted: 1991-02-19
•
Expires: 2009-06-21
Abstract
Abstract An emission system especially for controlling evaporative emissions from the fuel system of a two cycle engine having a split exhaust wherein a combustor is provided to burn fuel vapor mixed with scavenging air exhausted from the engine and the combustor exhaust may be mixed with the engine blowdown gas for further treatment in a catalytic device or other treatment means. Additional control features are disclosed.
Inventors
- 👤 Roy A. Giacomazzi
- 👤 Mark G. Kosowski
- 👤 Steven D. Stiles
- 👤 Jeffrey S. Stueven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:05
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2882; F02; F02M; F02M25/00; F02M25/08; F01N2250/00; F01N2250/04; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
An emission control system in combination with a source of fuel vapor and a two cycle engine of the type having exhaust splitter means that separate exhaust gas into relatively fuel rich exhaust blowdown gas discharged through a first outlet and relatively fuel lean scavenging air discharged through a second outlet, said emission control system comprising a combustor for burning evaporative emissions from the the fuel vapor source, exhaust treatment means for treating exhaust gases from the engine and combustor, first means connecting the first outlet with the treatment means for conducting exhaust blowdown gas directly to the treatment means, second means connecting the second outlet with the combustor for conducting scavenging air to the treatment means for use in burning fuel vapor, and third means connecting the fuel vapor source with the combustor for conducting fuel vapor to the combustor for burning.
Claim 2
Dependent Claim
143 words
An emission control system in combination with a source of fuel vapor and a two cycle engine of the type having exhaust splitter means that separate exhaust gas into relatively fuel rich exhaust blowdown gas discharged through a first outlet and relatively fuel lean scavenging air discharged through a second outlet, said emission control system comprising a combustor for burning evaporative emissions from the the fuel vapor source, exhaust treatment means for treating exhaust gases from the engine and combustor, first means connecting the first outlet with the treatment means for conducting exhaust blowdown gas directly to the treatment means, second means connecting the second outlet with the combustor for conducting scavenging air to the treatment means for use in burning fuel vapor, and third means connecting the fuel vapor source with the combustor for conducting fuel vapor to the combustor for burning.
Claim 3
Dependent Claim
29 words
An emission control system as in claim 1 and further including fourth means connecting the combustor with the treatment means for conducting combustor exhaust gas to the treatment means.
Claim 4
Dependent Claim
27 words
An emission control system as in claim 1 and further including pump means in the third means for assisting delivery of the fuel vapor to the combustor.
Claim 5
Dependent Claim
43 words
An emission control system as in claim 1 wherein the fuel vapor source includes a fuel tank and control means are provided in the third means for controlling the delivery of fuel vapors to the combustor for maintaining a desired air/fuel ratio range.
Claim 6
Dependent Claim
82 words
An emission control system as in claim 1 wherein the fuel vapor source includes a fuel tank and control means are provided in the third means for controlling the delivery of fuel vapors to the combustor for maintaining a desired air/fuel ratio range, the system further including pump means in the third means for assisting delivery of the fuel vapor to the combustor, and fourth means connecting the combustor with the treatment means for conducting combustor exhaust gas to the treatment means.
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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |