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IP.com Disclosure Number: IPCOM000250128D
Publication Date: 2017-Jun-02

Publishing Venue

The IP.com Prior Art Database

Related People

The Lubrizol Corporation: OWNER


Fuels with a deposit control additive ("DCA") having elliptical micelles to increase the power output of clean engines without deposits, resulting in a "power gain". Diesel fuel compositions with DCA comprising quaternary ammonium salt detergents. Quaternary ammonium salts having non-spherical (ellipsoidal) micelles in a hydrocarbon medium that result in power gain. Elliptical DCAs include DCAs having micelle structures with a minor axis and a major axis wherein the length of the major axis is longer than the length of the minor axis, including micelle shapes that are rod-like, worm-like or thread-like.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 5% of the total text.

Copyright June 2017 The Lubrizol Corporation, All Rights Reserved 1



[0001] The field of the disclosed technology is generally related to fuel compositions having quaternary ammonium salts. 5


[0002] Hydrocarbon based fuels generally contain numerous deposit-forming sub- stances. When used in internal combustion engines (ICE), deposits from these sub-

stances can form on and around constricted areas of the engine which come in contact

with the fuel. In diesel engines (and direct injection gasoline engines), the fuel injector 10

tips are particularly prone in deposit formation. The deposits typically form on the fuel

injector tips and in the nozzles or spray holes. These injector tip deposits can disrupt the

spray pattern of the fuel, potentially causing a reduction in power and fuel economy.

Deposit formation in diesel fuel injector nozzles can be highly problematic, resulting in

incomplete diesel combustion, and therefore power loss and misfiring. 15

[0003] Deposits may also form inside the injectors in addition to forming on the tips. These internal deposits are commonly called internal diesel injector deposits (IDIDs).

IDIDs can cause engines to stall or make them more difficult to start, or even prevent

starting entirely

[0004] As deposits form on the injector tips, the flow of fuel through the injectors is 20 reduced and a loss of power can be observed. This observation of “power loss” can be

measured by comparing the power output of the engine having the injector deposits with

the power output the engine had when it was clean or free of deposits. (Power loss can be

measured using the CEC F-98-08 DW10 diesel fuel injector fouling test. The test uses a

2.0 L, 4-cylinder Peugeot DW10 direct injection turbocharged, common rail engine. Other 25

acceptable tests include CEC F-23-01 XUD9 nozzle coking test. The test uses a 1.9 L 4-

cylinder Peugeot XUD 9 engine.) While stalling and starting issues are generally more

common in engines with IDID, power loss has also been observed in engines with IDID

(for example, some John Deere and Cummins engines).

[0005] Modern diesel engines are equipped with high pressure direct injection fuel 30 systems (“HP injector systems”) in order to meet the current emissions and fuel econ-

omy legislation. These HP injector systems typically operate at greater than >35MPa

and have solenoid or piezoelectric valves to control the fuel injection time and quantity,

Copyright June 2017 The Lubrizol Corporation, All Rights Reserved 2 thereby providing better fuel atomization. To lower engine noise, the engine's electronic

control unit can inject a small amount of diesel fuel just before the main injection event

("pilot" injection), thus reducing its explosiveness and vibration, as well as optimizing

injection timing and quantity to mitigate variations in fuel quality.

[0006] Detergents, or deposit control additive...