Patent US4681071A successfully refreshed from Google Patents.
US4681071A
Expired / Lapsed
US
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Method and apparatus for starting a diesel engine at a subfreezing temperature
Assignee: Individual
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Filing: 1985-12-05
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Granted: 1987-07-21
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Expires: 2005-12-05
Abstract
Abstract Method and apparatus for starting a glow-plug assisted diesel engine at a subfreezing temperature involves directing a flow of concentrated oxygen at a predetermined rate and pressure to the intake manifold of the diesel engine. The concentrated oxygen flow is directed directly into the intake manifold to fill the intake manifold with a high concentration of oxygen. When drawn into the firing chamber of the engine, the high concentration of oxygen is compressed during the compression stroke of the engine. Fuel is injected into the chamber with the compressed oxygen and ignited to start the engine.
Inventors
- 👤 Robert J. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:21
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/001; F02B; F02B3/00; F02B3/06; F02P; F02P19/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
94 words
Method of starting a glow-plug assisted diesel engine at a subfreezing temperature, said diesel engine having an intake manifold, comprising the steps of: delivering a flow of concentrated oxygen at a predetermined rate and a predetermined pressure to said intake manifold; and directing said concentrated oxygen flow directly into said intake manifold to fill said manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said diesel engine for drawing said predetermined amount of oxygen into said diesel engine during an intake stroke of said diesel engine.
Claim 2
Dependent Claim
94 words
Method of starting a glow-plug assisted diesel engine at a subfreezing temperature, said diesel engine having an intake manifold, comprising the steps of: delivering a flow of concentrated oxygen at a predetermined rate and a predetermined pressure to said intake manifold; and directing said concentrated oxygen flow directly into said intake manifold to fill said manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said diesel engine for drawing said predetermined amount of oxygen into said diesel engine during an intake stroke of said diesel engine.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein said step of directing said concentrated oxygen flow includes directing said concentrated oxygen flow into said intake manifold in the same direction as said available air would enter said intake manifold.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said method further comprises the step of storing a supply of said concentrated oxygen.
Claim 5
Dependent Claim
35 words
The method of claim 3 wherein said step of delivering said concentrated oxygen flow to said intake manifold includes the step of controlling the rate of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 6
Dependent Claim
36 words
The method of claim 3 wherein said step of delivering said concentrated oxygen flow to said intake manifold further includes the step of regulating the pressure of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 7
Dependent Claim
96 words
Apparatus for starting a glow-plug assisted diesel engine at a subfreezing temperature, said diesel engine having an intake manifold comprising means for delivering a flow of concentrated oxygen at a predetermined rate and a predetermined pressure to said intake manifold; and means for directing said concentrated oxygen flow directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said diesel engine for drawing said predetermined amount of oxygen into said diesel engine during an intake stroke of said diesel engine.
Claim 8
Dependent Claim
96 words
Apparatus for starting a glow-plug assisted diesel engine at a subfreezing temperature, said diesel engine having an intake manifold comprising means for delivering a flow of concentrated oxygen at a predetermined rate and a predetermined pressure to said intake manifold; and means for directing said concentrated oxygen flow directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said diesel engine for drawing said predetermined amount of oxygen into said diesel engine during an intake stroke of said diesel engine.
Claim 9
Dependent Claim
39 words
The apparatus of claim 6 wherein said means for directing said concentrated oxygen flow includes means for directing said concentrated oxygen flow into said intake manifold in the same direction as said available air would enter said intake manifold.
Claim 10
Dependent Claim
24 words
The apparatus of claim 6 wherein said means for delivering said concentrated oxygen flow includes container means for storing a supply of concentrated oxygen.
Claim 11
Dependent Claim
32 words
The apparatus of claim 8 wherein said means for delivering said concentrated oxygen flow further includes regulator means for regulating the pressure of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 12
Dependent Claim
32 words
The apparatus of claim 8 wherein said means for delivering said concentrated oxygen flow further includes valve means for controlling the rate of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 13
Dependent Claim
120 words
Method of starting a diesel engine at a subfreezing temperature, said engine having an intake manifold and a firing chamber, said firing chamber having a glow plug, comprising the steps of: directing a flow of concentrated oxygen directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said engine; drawing said predetermined amount of oxygen in said intake manifold into said firing chamber during an intake stroke of said diesel engine; compressing said predetermined amount of oxygen in said firing chamber; injecting fuel into said firing chamber; and igniting said compressed oxygen and said injected fuel with said glow plug to start said engine.
Claim 14
Dependent Claim
120 words
Method of starting a diesel engine at a subfreezing temperature, said engine having an intake manifold and a firing chamber, said firing chamber having a glow plug, comprising the steps of: directing a flow of concentrated oxygen directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said engine; drawing said predetermined amount of oxygen in said intake manifold into said firing chamber during an intake stroke of said diesel engine; compressing said predetermined amount of oxygen in said firing chamber; injecting fuel into said firing chamber; and igniting said compressed oxygen and said injected fuel with said glow plug to start said engine.
Claim 15
Dependent Claim
36 words
The method of claim 11 wherein said step of directing said concentrated oxygen flow includes directing said concentrated oxygen flow into said manifold in the same direction as said available air would enter said intake manifold.
Claim 16
Dependent Claim
29 words
The method of claim 11 wherein said method further comprises the step of delivering said concentrated oxygen flow to said engine at a predetermined pressure and a predetermined rate.
Claim 17
Dependent Claim
22 words
The method of claim 13 wherein said step of delivering said concentrated oxygen flow includes storing a supply of said concentrated oxygen.
Claim 18
Dependent Claim
28 words
The method of claim 14 wherein said step of delivering said concentrated oxygen flow includes regulating the pressure of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 19
Dependent Claim
28 words
The method of claim 14 wherein said step of delivering said concentrated oxygen flow includes controlling the rate of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 20
Dependent Claim
116 words
Apparatus for starting a diesel engine at a subfreezing temperature, said engine having an intake manifold and a firing chamber, comprising: means for directing a flow of concentrated oxygen directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said engine; means for drawing said predetermined amount of oxygen in said intake manifold into said firing chamber during an intake stroke of said diesel engine; means for compressing said predetermined amount of oxygen in said firing chamber; means for injecting fuel into said firing chamber; and means for igniting said compressed oxygen and said injected fuel to start said engine.
Claim 21
Dependent Claim
116 words
Apparatus for starting a diesel engine at a subfreezing temperature, said engine having an intake manifold and a firing chamber, comprising: means for directing a flow of concentrated oxygen directly into said intake manifold to fill said intake manifold with a predetermined amount of oxygen higher than the amount of oxygen in air available to said engine; means for drawing said predetermined amount of oxygen in said intake manifold into said firing chamber during an intake stroke of said diesel engine; means for compressing said predetermined amount of oxygen in said firing chamber; means for injecting fuel into said firing chamber; and means for igniting said compressed oxygen and said injected fuel to start said engine.
Claim 22
Dependent Claim
37 words
The apparatus of claim 17 wherein said means for directing said concentrated oxygen flow includes means for directing said concentrated oxygen flow in said manifold in the same direction as said available air would enter said manifold.
Claim 23
Dependent Claim
28 words
The apparatus of claim 17 wherein said apparatus further comprises means for delivering said concentrated oxygen flow to said engine at a predetermined pressure and a predetermined rate.
Claim 24
Dependent Claim
24 words
The apparatus of claim 19 wherein said means for delivering said concentrated oxygen flow includes means for storing a supply of said concentrated oxygen.
Claim 25
Dependent Claim
31 words
The apparatus of claim 20 wherein said means for delivering said concentrated oxygen flow further includes means for regulating the pressure of said concentrated oxygen flow from said concentrated oxygen supply.
Claim 26
Dependent Claim
32 words
The apparatus of claim 20 wherein said means for delivering said concentrated oxygen flow still further includes means for controlling the rate of said concentrated oxygen flow from said concentrated oxygen supply.
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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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |