US4230075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Purification Sciences Inc
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Filing: 1978-12-26
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Granted: 1980-10-28
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Expires: 1998-12-26
Abstract
Abstract An internal combustion engine method and apparatus wherein most or all of the air compression required for combustion is done outside of the internal combustion engine and out of heat exchange contact with the combustion chamber. The engine includes direct regeneration of exhaust heat and the compressor includes means for varying the compression ratio thereof in response to various parameters such as throttle demand and ambient temperature. Fuel injection and/or carburetion are used in various combinations with the compressor, and pulsed compressed air is fed from the compressor into the combustion chamber in matched relationship to the position of the piston in the cylinder.
Inventors
- 👤 Frank E. Lowther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:18
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/14; F02B3/00; F02B3/06; F02B3/08; F02B33/00; F02B33/32; F02B33/34; F02B33/36; F02B41/00; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F02M31/066; F02B1/00; F02B1/02; F02B1/04; F02D; F02D2200/00; F02D2200/02; F02D2200/06; F02D2200/0606; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
152 words
A method for operating an internal combustion engine having an engine block including at least one combustion chamber comprising: (a) compressing air to be fed into said combustion chamber externally of said engine block; in a rotary sliding vane compressor having a pulsed output and matching the pulses thereof with the position of the piston in said cylinder; (b) maintaining the air being compressed out of heat exchange contact with said engine block during said compressing step; (c) mixing fuel with the air to be fed into said combustion chamber prior to the below-recited igniting step; (d) feeding said compressed air into said combustion chamber; (e) igniting a mixture of fuel and said compressed air in said combustion chamber; and (f) regenerating the heat in the exhaust gas from said combustion chamber by heat exchanging it with said compressed air prior to said step of feeding compressed air to said combustion chamber.
Claim 2
Independent Claim
152 words
A method for operating an internal combustion engine having an engine block including at least one combustion chamber comprising: (a) compressing air to be fed into said combustion chamber externally of said engine block; in a rotary sliding vane compressor having a pulsed output and matching the pulses thereof with the position of the piston in said cylinder; (b) maintaining the air being compressed out of heat exchange contact with said engine block during said compressing step; (c) mixing fuel with the air to be fed into said combustion chamber prior to the below-recited igniting step; (d) feeding said compressed air into said combustion chamber; (e) igniting a mixture of fuel and said compressed air in said combustion chamber; and (f) regenerating the heat in the exhaust gas from said combustion chamber by heat exchanging it with said compressed air prior to said step of feeding compressed air to said combustion chamber.
Claim 3
Dependent Claim
18 words
The method according to claim 1 including providing two pressure pulses for each charge of said combustion chamber.
Claim 4
Dependent Claim
18 words
The method according to claim 1 including providing four pressure pulses for each charge of said combustion chamber.
Claim 5
Dependent Claim
21 words
The method according to claim 3 including providing two of said pulses as air-fuel mixtures and two as solely air charges.
Claim 6
Independent Claim
160 words
An apparatus comprising: (a) an internal combustion engine including at least one piston-cylinder-combustion chamber system; (b) means for compressing air to be fed into said combustion chamber, said compressing means being separate from said internal combustion engine and out of heat exchange contact therewith, and comprising a rotary sliding vane compressor having a pulsed output and means for matching the pulses thereof with the position of said piston in said cylinder, (c) means for mixing fuel with air to form an air-fuel mixture to be ignited in said combustion chamber; (d) means for feeding compressed air from said compressor into said combustion chamber; (e) means for igniting an air-fuel mixture in said combustion chamber; (f) exhaust duct means for feeding hot exhaust gas from said combustion chamber; and (g) means for regenerating the heat in the hot exhaust gas from said combustion chamber including at least one heat exchanger between said exhaust duct means and said compressed air feeding means.
Claim 7
Independent Claim
160 words
An apparatus comprising: (a) an internal combustion engine including at least one piston-cylinder-combustion chamber system; (b) means for compressing air to be fed into said combustion chamber, said compressing means being separate from said internal combustion engine and out of heat exchange contact therewith, and comprising a rotary sliding vane compressor having a pulsed output and means for matching the pulses thereof with the position of said piston in said cylinder, (c) means for mixing fuel with air to form an air-fuel mixture to be ignited in said combustion chamber; (d) means for feeding compressed air from said compressor into said combustion chamber; (e) means for igniting an air-fuel mixture in said combustion chamber; (f) exhaust duct means for feeding hot exhaust gas from said combustion chamber; and (g) means for regenerating the heat in the hot exhaust gas from said combustion chamber including at least one heat exchanger between said exhaust duct means and said compressed air feeding means.
Claim 8
Dependent Claim
23 words
The apparatus according to claim 5 including means for providing two pressure pulses from said compressor for each charge in said combustion chamber.
Claim 9
Dependent Claim
20 words
The apparatus according to claim 5 including means for providing four pressure pulses for each charge in said combustion chamber.
Claim 10
Dependent Claim
30 words
The apparatus according to claim 7 including means for providing two of said four pulses as air-fuel mixtures and the remaining two of said four pulses solely as air charges.
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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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |