US4588415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel compositions
Assignee: Ethyl Corp
•
Filing: 1985-09-20
•
Granted: 1986-05-13
•
Expires: 2005-09-20
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 dihydrocarbyl phosphite. 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 03:23
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/23; C10L1/231; C10L1/26; C10L1/2633; C10L1/2641
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
60 words
Distillate fuel for indirect injection compression ignition engines containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 2
Dependent Claim
60 words
Distillate fuel for indirect injection compression ignition engines containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 4
Dependent Claim
85 words
Distillate fuel for indirect injection compression ignition engines containing at least the combiantion of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR4## wherein R is a C 1 to C 20 hydrocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression igniton engines operated on such fuel.
Claim 5
Dependent Claim
85 words
Distillate fuel for indirect injection compression ignition engines containing at least the combiantion of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR4## wherein R is a C 1 to C 20 hydrocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression igniton engines operated on such fuel.
Claim 6
Dependent Claim
15 words
The composition of claim 3 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 7
Dependent Claim
13 words
The composition of claim 3 wherein said dihydrocarbyl group is a dialkyl group.
Claim 8
Dependent Claim
12 words
The composition of claim 5 wherein said dihydrocarbyl phosphite is dioleyl phosphite.
Claim 9
Dependent Claim
12 words
The composition of claim 5 wherein said dihydrocarbyl phosphite is dicyclohexyl phosphite.
Claim 10
Dependent Claim
12 words
The composition of claim 5 wherein said dihydrocarbyl phosphite is di(nonylphenyl) phosphite.
Claim 11
Independent Claim
70 words
A method of inhibiting coking, especially throttling nozzle coking, in the prechambers or swirl chambers of indirect injection compression ignition engines, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 12
Independent Claim
70 words
A method of inhibiting coking, especially throttling nozzle coking, in the prechambers or swirl chambers of indirect injection compression ignition engines, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 13
Independent Claim
95 words
A method of inhibiting coking, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR5## wherein R is a C 1 to C 20 hyorocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 14
Independent Claim
95 words
A method of inhibiting coking, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines, which method comprises supplying said engine with a distillate fuel containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR5## wherein R is a C 1 to C 20 hyorocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to inhibit such coking in an indirect injection compression ignition engine operated on such fuel.
Claim 15
Dependent Claim
15 words
The method of claim 9 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 16
Dependent Claim
15 words
The method of claim 10 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 17
Dependent Claim
13 words
The method of claim 10 wherein said dihydrocarbyl group is a dialkyl group.
Claim 18
Dependent Claim
12 words
The method of claim 13 wherein said dihydrocarbyl phosphite is dioleyl phosphite.
Claim 19
Dependent Claim
12 words
The method of claim 13 wherein said dihydrocarbyl phosphite is dicyclohexyl phosphite.
Claim 20
Dependent Claim
12 words
The method of claim 13 wherein said dihydrocarbyl phosphite is di(nonylphenyl) phosphite.
Claim 21
Dependent Claim
61 words
An additive fluid concentrate for use in distillate fuels containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 22
Dependent Claim
61 words
An additive fluid concentrate for use in distillate fuels containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 23
Dependent Claim
29 words
A concentrate of claim 17 comprising about 5 to 95% by weight of said organic nitrate ignition accelerator and about 5 to 95% by weight of said dihydrocarbyl phosphite.
Claim 24
Dependent Claim
86 words
An additive fluid concentrate for use in distillate fuels containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR6## wherein R is a C 1 to C 20 hydrocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 25
Dependent Claim
86 words
An additive fluid concentrate for use in distillate fuels containing at least the combination of (i) organic nitrate ignition accelerator, and (ii) a dihydrocarbyl phosphite having the formula: ##STR6## wherein R is a C 1 to C 20 hydrocarbyl group selected from alkyl, alkaryl, aralkyl, alkenyl, cycloalkyl and cycloalkenyl groups, said combination being present in an amount sufficient to minimize the coking characteristics of such fuel, especially throttling nozzle coking in the prechambers or swirl chambers of indirect injection compression ignition engines operated on such fuel.
Claim 26
Dependent Claim
15 words
A concentrate of claim 19 wherein said ignition accelerator is a mixture of octyl nitrates.
Claim 27
Dependent Claim
13 words
A concentrate of claim 19 wherein said dihydrocarbyl group is a dialkyl group.
Claim 28
Dependent Claim
12 words
A concentrate of claim 21 wherein said dihydrocarbyl phosphite is dioleyl phosphite.
Claim 29
Dependent Claim
12 words
A concentrate of claim 21 wherein said dihydrocarbyl phosphite is dicyclohexyl phosphite.
Claim 30
Dependent Claim
12 words
A concentrate of claim 21 wherein said dihydrocarbyl phosphite is di(nonylphenyl) phosphite.
Claim 31
Dependent Claim
28 words
An additive fluid concentrate comprising about 5 to 95% by weight of a mixture of octyl nitrates and from about 5 to 95% by weight of dioleyl phosphite.
Claim 32
Dependent Claim
28 words
An additive fluid concentrate comprising about 5 to 95% by weight of a mixture of octyl nitrates and from about 5 to 95% by weight of dioleyl phosphite.
References Cited (Backward Citations)
US2280217A
Cited
US3309431A
Cited
US3523099A
Cited
US3558470A
Cited
US3807974A
Cited
US4177768A
Cited
US4529528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |