Patent US4539946A successfully refreshed from Google Patents.
US4539946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the combustion cycle in a combustion engine
Assignee: Individual
•
Filing: 1982-09-06
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Granted: 1985-09-10
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Expires: 2002-09-06
Abstract
Abstract In a combustion engine, the amount of working medium is controlled by allowing the engine to suck in an amount of working medium corresponding to full gas operation, of which a portion is then allowed to flow out again without being compressed, while an amount proportional to the current load is retained and compressed, the compression ratio being regulated as a function of the amount of working medium retained. In such an engine there is a movable member (4) for adjusting the compression ratio, the position of said member being controlled by a control means (9). Furthermore, there is at least one spill flow valve (12), the open-time of which is variable as a function of the current load of the engine.
Inventors
- 👤 Lars G. B. Hedelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:33
CPC Classifications
F; F02; F02D; F02D13/00; F02D13/02; F02D13/0203; F02D13/0215; F02D13/0242; F02D13/0249; F02D15/00; F02D15/04; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A method of controlling the combustion cycle in an internal combustion piston engine in which a gaseous working medium is compressed, is combusted and performs work, and in which the compression ratio is varied during operation, comprising: regulating the amount of working medium by operating the engine to draw in a maximum amount of working medium corresponding, to full gas operation and then causing a portion of the working medium to flow out again without being compressed; retaining and compressing an amount of the working medium proportional to the current load; and regulating the compression ratio as a function of the amount of working medium retained to obtain a substantially constant compression pressure under varying operating conditions.
Claim 2
Independent Claim
117 words
A method of controlling the combustion cycle in an internal combustion piston engine in which a gaseous working medium is compressed, is combusted and performs work, and in which the compression ratio is varied during operation, comprising: regulating the amount of working medium by operating the engine to draw in a maximum amount of working medium corresponding, to full gas operation and then causing a portion of the working medium to flow out again without being compressed; retaining and compressing an amount of the working medium proportional to the current load; and regulating the compression ratio as a function of the amount of working medium retained to obtain a substantially constant compression pressure under varying operating conditions.
Claim 3
Dependent Claim
49 words
The method of claim 1 in which retaining and compressing the amount of the working medium comprises closing a valve controlling the flow of working medium out of a chamber defined in the engine when the amount of working medium in the chamber is proportional to the current load.
Claim 4
Dependent Claim
49 words
The method of claim 2, further comprising determining the position of a piston in the chamber and sensing the pressure in the chamber immediately after the valve is closed; regulating the compression ratio comprising varying the compression ratio in accordance with the determined piston position and the sensed pressure.
Claim 5
Dependent Claim
18 words
The method of claim 3 in which varying the compression ratio comprises varying the volume of the chamber.
Claim 6
Dependent Claim
22 words
The method of claim 1 in which regulating the compression ratio comprises varying the volume of a chamber defined in the engine.
Claim 7
Dependent Claim
29 words
The method of claim 1, further comprising injecting an amount of fuel into the compressed working medium to obtain a substantially constant working medium/fuel ratio under varying operating conditions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |