US3734074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opposed piston two-stroke cycle internal combustion engines
Assignee: MARINE DESIGN CONSULTANTS Ltd
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Filing: 1971-06-18
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Granted: 1973-05-22
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Expires: 1991-06-18
Abstract
Abstract A multi-cylinder, opposed piston, two-stroke cycle internal combustion engine, of the kind in which air is admitted to the cylinders under pressure through ports in the cylinder walls at or near the lower ends thereof (i.e. the ends nearest the crankshaft), and exhausted through ports in the cylinder walls at the other ends of the cylinders, has two exhaust driven turbochargers. The gases are exhausted from each cylinder through two sets of ports, the one set of ports for each cylinder being linked to one turbocharger and the other sets to the other turbocharger, so that each turbocharger is driven by approximately half the exhaust gases leaving the engine.
Inventors
- 👤 J Butler
- 👤 J Jordan
- 👤 F Orbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:27
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/28; F02B25/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/03; F02B2700/037
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A multi-cylinder in lien, opposed piston, two stroke cycle, internal combustion engine of the kind in which the pistons are operatively connected to separate cranks on a single crank-shaft and in which air for scavenging and combustion is admitted under pressure to the engine cyclinder through ports in the cylinder wall in the region of one end thereof, the exhaust taking place through ports in the cylinder wall in the region of the other end thereof, and having a first exhaust driven turbocharger at one end of the engine, and a second exhaust driven turbocharger at the other end of the engine, the first turbocharger having passageways directing exhaust gases from the exhaust ports on one side of each cylinder of the engine through a common manifold line to said first turbocharger, and the second turbocharger having passageways directing exhaust gases from the the exhaust ports on the other side of each cylinder of the engine through a common manifold to said second turbocharger.
Claim 2
Dependent Claim
164 words
A multi-cylinder in lien, opposed piston, two stroke cycle, internal combustion engine of the kind in which the pistons are operatively connected to separate cranks on a single crank-shaft and in which air for scavenging and combustion is admitted under pressure to the engine cyclinder through ports in the cylinder wall in the region of one end thereof, the exhaust taking place through ports in the cylinder wall in the region of the other end thereof, and having a first exhaust driven turbocharger at one end of the engine, and a second exhaust driven turbocharger at the other end of the engine, the first turbocharger having passageways directing exhaust gases from the exhaust ports on one side of each cylinder of the engine through a common manifold line to said first turbocharger, and the second turbocharger having passageways directing exhaust gases from the the exhaust ports on the other side of each cylinder of the engine through a common manifold to said second turbocharger.
Claim 3
Dependent Claim
70 words
An engine as claimed in claim 1 in which each cylinder is surrounded by an exhaust manifold arranged to direct exhaust gases issuing from the exhaust ports at the said one side of the engine towards the said one end of the engine, and arranged to direct exhaust gases issuing from the exhaust ports at the said other side of the engine towards the said other end of the engine.
Claim 4
Dependent Claim
118 words
An engine as claimed in claim 2 in which there are provided six cylinders and twelve pistons in said cylinders, air being admitted to each cylinder in the region of the end nearer the crankshaft, in which the turbochargers supply air to compressors which in turn supply air to the cylinders, and in which each cylinder is provided with four exhaust ports, two such ports being linked to each turbocharger by rectangular passageways and by exhaust manifolds, the said ports, passageways and exhaust manifolds being arranged to direct the flow of exhaust gas in the same sense as the direction of swirl of the gas in the cylinder, and the passageways increasing in height in the radial direction.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |