US4623363A
Expired / Lapsed
US
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Fuel compositions
Assignee: Ethyl Corp
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Filing: 1985-11-27
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Granted: 1986-11-18
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Expires: 2005-11-27
Abstract
Abstract Coking in and around the injector nozzles of indirect injection compression ignition engines is reduced by means of distillate fuel with which has been blended suitable concentrations of (i) organic nitrate ignition accelerator and (ii) a P 2 S 5 -terpene reaction product. Also described are additive mixtures of (i) and (ii) for use in distillate fuels in amounts sufficient to reduce the coking tendencies of such fuels when used in the operation of indirect injection compression ignition engines.
Inventors
- 👤 Edward F. Zaweski
- 👤 Leonard M. Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:47
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L10/00; C10L10/04; C10L1/22; C10L1/23; C10L1/231; C10L1/26; C10L1/2691
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
73 words
Distillate fuel for indirect injection compression ignition engines containing, in an amount sufficient to minimize coking, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel, at least the combination of (i) organic nitrate ignition accelerator and (ii) a P 2 S 5 -terpene reaction product which, when added to said fuel in combination with said organic nitrate ignition accelerator minimizes said coking.
Claim 2
Dependent Claim
73 words
Distillate fuel for indirect injection compression ignition engines containing, in an amount sufficient to minimize coking, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel, at least the combination of (i) organic nitrate ignition accelerator and (ii) a P 2 S 5 -terpene reaction product which, when added to said fuel in combination with said organic nitrate ignition accelerator minimizes said coking.
Claim 3
Dependent Claim
15 words
A composition of claim 1 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 4
Dependent Claim
24 words
A composition of claim 1 wherein said P 2 S 5 -terpene reaction product is a P 2 S 5 -dicyclic terpene reaction product.
Claim 5
Dependent Claim
24 words
A composition of claim 3 wherein said P 2 S 5 -α-dicyclic terpene reaction product is a P 2 S 5 -α-pinene reaction product.
Claim 6
Dependent Claim
24 words
A composition of claim 3 wherein said P 2 S 5 -dicyclic terpene reaction product is a P 2 S 5 -turpentine reaction product.
Claim 7
Independent Claim
94 words
A method of inhibiting coking, especially throttling nozzle coking, in the prechambers or swirl chambers of an indirect injection compression ignition engine, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator and (ii) a P 2 S 5 -terpene reaction product capable of inhibiting said coking when added to said fuel in combination with said organic nitrate ignition accelerator, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 8
Independent Claim
94 words
A method of inhibiting coking, especially throttling nozzle coking, in the prechambers or swirl chambers of an indirect injection compression ignition engine, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator and (ii) a P 2 S 5 -terpene reaction product capable of inhibiting said coking when added to said fuel in combination with said organic nitrate ignition accelerator, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 9
Dependent Claim
17 words
A method of claim 6 wherein said organic nitrate ignition accelerator is a mixture of octyl nitrates.
Claim 10
Dependent Claim
23 words
A method of claim 6 wherein said P 2 S 5 -terpene reaction product is P 2 S 5 -dicyclic terpene reaction product.
Claim 11
Dependent Claim
24 words
A method of claim 8 wherein said P 2 S 5 -dicyclic terpene reaction product is a P 2 S 5 -α-pinene reaction product.
Claim 12
Dependent Claim
24 words
A method of claim 8 wherein said P 2 S 5 -dicyclic terpene reaction product is a P 2 S 5 -turpentine reaction product.
Claim 13
Dependent Claim
73 words
An additive fluid concentrate for use in distillate fuels comprising, in proportions sufficient to minimize the coking characteristics of such fuels, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuels, (i) organic nitrate ignition accelerator, and (ii) a P 2 S 5 -terpene reaction product, which when added to said fuel in combination with said organic nitrate ignition accelerator minimizes said coking.
Claim 14
Dependent Claim
73 words
An additive fluid concentrate for use in distillate fuels comprising, in proportions sufficient to minimize the coking characteristics of such fuels, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuels, (i) organic nitrate ignition accelerator, and (ii) a P 2 S 5 -terpene reaction product, which when added to said fuel in combination with said organic nitrate ignition accelerator minimizes said coking.
Claim 15
Dependent Claim
15 words
A concentrate of claim 11 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 16
Dependent Claim
32 words
A concentrate of claim 11 comprising about 5-95 percent by weight of said organic nitrate ignition accelerator and about 5-95 percent by weight of said P 2 S 5 -terpene reaction product.
Claim 17
Dependent Claim
24 words
A concentrate of claim 11 wherein said P 2 S 5 -terpene reaction product is a P 2 S 5 -dicyclic terpene reaction product.
Claim 18
Dependent Claim
24 words
A concentrate of claim 14 wherein said P 2 S 5 -dicyclic terpene reaction product is a P 2 S 5 -pinene reaction product.
Claim 19
Dependent Claim
24 words
A concentrate of claim 14 wherein said P 2 S 5 -dicyclic terpene reaction product is a P 2 S 5 -turpentine reaction product.
References Cited (Backward Citations)
US2137410A
Cited
US2280217A
Cited
US2561773A
Cited
US2689258A
Cited
US2934047A
Cited
US2799655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |