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Method of operating a direct injection spark-ignited engine with a fuel composition

a fuel composition and direct injection technology, applied in the petroleum industry, liquid carbonaceous fuels, fuel additives, etc., can solve the problem that the excellent control of one deposit type does not ensure control

Inactive Publication Date: 2003-09-25
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] A further object of the present invention is to provide for the cleanliness of the fuel injectors and combustion chambers of a direct injection spark-ignited engine.

Problems solved by technology

Excellent control of one deposit type does not insure control of the other.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

demonstrate the effectiveness of the method of the present invention in controlling deposits in the combustion chambers and fuel injectors of a direct injection spark-ignited engine in real world, vehicle tests. This controlling of deposits in the combustion chambers and fuel injectors is directly correlated to vehicle performance. Excellent control of one deposit type does not insure control of the other. The present invention provides a method to optimize performance for both injector and combustion chamber deposits in DISE engines. The greater the HLBm value for the nitrogen-containing dispersant and fluidizer when present, the greater the assurance that both injector and combustion chamber deposit control will be achieved provided the other three requirements of molecular volume factor, nitrogen concentration and actives concentration are met.

1TABLE I Vehicle Keep Clean Field Test.sup.1 Avg Inj Example Fuel Treated HLBm Average CCD.sup.3 Flow Loss.sup.4 1 No -- 9.2 3.2% 2 PIBEDA...

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Abstract

The present invention is directed to a method to clean up or keep clean the fuel system of a direct injection spark-ignited engine by operating the engine with a fuel composition that includes a liquid fuel and a fuel additive composition. The fuel additive composition useful in the present invention has at least one nitrogen-containing dispersant and optionally a fluidizer where the dispersant has a specific lipophilic parameter and the dispersant or the dispersant and the fluidizer have a specific hydrophilic-lipophilic parameter, the dispersant provides about 0.15 to about 50 ppm by weight nitrogen in the fuel composition, and the fluidizer and / or the dispersant provide about 10 to about 10,000 ppm by weight active components in the fuel composition. The method of the present invention is effective in controlling deposits in fuel injectors and combustion chambers of a direct injection spark-ignited engine.

Description

[0001] 1. Field of the Invention[0002] The present invention involves a method of operating a direct injection spark-ignited engine (DISE) using a fuel composition comprising a liquid fuel and a fuel additive composition. The method provides for the cleanliness of the fuel system of the DISE.[0003] 2. Description of the Related Art[0004] The direct injection spark-ignited engine is a new technology that has been commercially introduced in Japan and Europe by manufacturers Mitsubishi, Nissan and Toyota. The DISE offers significant performance benefits relative to a conventional port fuel injection gasoline engine (PFIGE). The specific power output of a DISE relative to a PFIGE is increased, which results in better fuel economy and driveability in terms of throttle response and acceleration. The DISE, when coupled with current catalyst systems for reducing exhaust emissions, also meets exhaust emission standards. The overall performance of a DISE is directly related to the cleanliness...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/14C10L1/16C10L1/18C10L1/22C10L1/238C10L1/2383C10L1/2387C10L10/00
CPCC10L1/143C10L1/146C10L1/1616C10L10/00C10L1/238C10L1/2383C10L1/2387C10L1/1985C10L10/04C10L10/06
Inventor ARTERS, DAVID C.JACKSON, MITCHELL M.DALY, DANIEL T.MACDUFF, MALCOLM G.J.
Owner THE LUBRIZOL CORP