US4538574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged internal combustion engine with a cylinder head having four valves per cylinder
Assignee: Fiat Auto SpA
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Filing: 1984-03-20
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Granted: 1985-09-03
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Expires: 2004-03-20
Abstract
Abstract The present invention relates to a supercharged internal combustion engine having two or more cylinders, with a cylinder head having four valves per cylinder and provided with at least two turbo-compressor units, in which, with each combustion chamber separated by an imaginary line along the longitudinal axis of the cylinder head, an exhaust valve and an induction valve provided with the associated ducts connected to the first of the two turbo-compressor units are located on a first side of the imaginary line, while the other two valves lie in the half of the combustion chamber on the other side of the imaginary line and are connected to the second of the two turbo-compressor units.
Inventors
- 👤 Claudio Lombardi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:16
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/107; F02; F02B; F02B37/00; F02B37/007; F02B37/02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02B1/00; F02B1/02; F02B1/04; F02F2001/244; F02F2001/245; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
An internal combustion engine comprising: (a) at least two in-line cylinders forming combustion chambers, (b) at least two turbo-compressor units for supercharging said cylinders and with said units being placed at the sides of the engine, (c) a cylinder head having four valves per cylinder with each set of said valves being arranged progressively around the circumference of the respective combustion chamber with alternating induction and exhaust valves, (d) each said turbo-compressor unit being connected to induction and exhaust manifolds which are in turn respectively associated with induction and exhaust valves which are disposed on one side of a longitudinal axis passing through said cylinder head of said engine.
Claim 2
Dependent Claim
109 words
An internal combustion engine comprising: (a) at least two in-line cylinders forming combustion chambers, (b) at least two turbo-compressor units for supercharging said cylinders and with said units being placed at the sides of the engine, (c) a cylinder head having four valves per cylinder with each set of said valves being arranged progressively around the circumference of the respective combustion chamber with alternating induction and exhaust valves, (d) each said turbo-compressor unit being connected to induction and exhaust manifolds which are in turn respectively associated with induction and exhaust valves which are disposed on one side of a longitudinal axis passing through said cylinder head of said engine.
Claim 3
Dependent Claim
43 words
An internal combustion engine according to claim 1, characterised by the fact that the connection of the exhaust and induction valves with the turbo-compressor units include two exhaust manifolds and two induction manifolds disposed on each of the two sides of the engine.
Claim 4
Dependent Claim
49 words
An internal combustion engine according to claim 1, characterised by the fact that the connection of the exhaust valves and induction valves with the turbo-compressor units include two exhaust manifolds disposed on the sides of the engine and two induction manifolds disposed on the cylinder head of the engine.
Claim 5
Dependent Claim
49 words
An internal combustion engine according to claim 1, characterised by the fact that the connection of the exhaust valves and induction valves to the turbo-compressor units include two exhaust manifolds disposed on the sides of the engine and an induction manifold disposed on the cylinder head of the engine.
Claim 6
Dependent Claim
32 words
An internal combustion engine according to claim 4, characterised by the fact that to the induction manifold there are connected two induction ducts for each of two valves for each combustion chamber.
Claim 7
Dependent Claim
41 words
An internal combustion engine according to claim 4, characterised by the fact that to the induction manifold there is connected a common induction duct which splits into two ducts to connect to each of the two valves for each combustion chamber.
Claim 8
Dependent Claim
46 words
An internal combustion engine provided with two banks of cylinders with at least two cylinders in line in each bank, characterised by the fact that it is provided with four turbo-compressor units disposed on the two sides of each of the two banks of the engine.
Claim 9
Dependent Claim
46 words
An internal combustion engine provided with two banks of cylinders with at least two cylinders in line in each bank, characterised by the fact that it is provided with four turbo-compressor units disposed on the two sides of each of the two banks of the engine.
Claim 10
Dependent Claim
34 words
An internal combustion engine according to claim 7, characterised by the fact that the two turbo-compressor units between the banks of the cylinders are replaced by a common turbo-compressor unit having an equivalent capacity.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |