Fuel Additives & Fuel Economy Abstracts - Southwest Research ...

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Topic:Point of Contact:Test Objective:Vehicle:Test Procedure:Fuel Requirement:Combustion ChamberDeposit (CCD)EvaluationsKevin BrunnerPhone: (210) 522-3579Fax: (210) 684-7523The objective of this test is to evaluate the capability of atest fuel or fuel additive to prevent CCD growth or to cleanCCDs previously formed.Various vehicles may be used for this test procedure.For CCD Thickness Measurements:Use a Fisher Permascope® thickness measurementdevice linked to a computer for data storage.For CCD Weight Measurements:Deposits are manually scraped into specially designedenvelopes. Deposits are then weighed to the nearest 0.1mg.Various amounts of fuel may be used for this procedure.Duration: This test procedure usually requires 10,000 to 20,000miles for deposit stabilization. The driving route shouldinclude a mix of city, suburban, and highway driving with asoak period.Test Results:Note:CCD thickness and weight measurements for the pistontop and combustion chamber regions of each cylinder aredetermined.CCD evaluations are usually incorporated into a fleetprogram that also includes intake valve deposit (IVD) andoctane requirement increase (ORI) evaluations.10SOUTHWEST RESEARCH INSTITUTESan Antonio, TexasJuly 2010
Test:Point of ContactTest ObjectiveApparatusTest ProcedureFuel RequirementSCPI Fuel InjectorPoppet Sticking TestKevin BrunnerPhone: (210) 522-3579Fax: (210) 684-7523The objective of this test is to evaluate the ability ofgasoline deposit control additives to prevent fuel injectorpoppet nozzles to stick closed. This test is part of the TOPTIER DETERGENT GASOLINE DEPOSIT CONTROLPERFORMANCE STANDARD.1998 to 2001 General Motors light-duty van equipped witha 4.3-L V6 engine and a Sequential Central Port Injection(SCPI) fuel injection system1. Flush vehicle fuel system with test fuel and install newinjectors.2. An automatic control system starts and idles the vehiclefor five minutes.3. The engine is then shut off and allowed to hot-soak for25 minutes.4. This cycle is repeated for a total of 192 cycles (96hours).5. The engine is allowed to hot-soak for 48 hours, duringwhich time the engine is not started but is maintained atoperating temperature.6. At the end of the 48-hour hot soak, the block heatersare turned off and the engine is allowed to coolnaturally to room temperature.7. An injector balance test is conducted to determinewhether any poppet nozzles are stuck closed.The fuel requirement for this test is 20 US gallons.11SOUTHWEST RESEARCH INSTITUTESan Antonio, TexasJuly 2010
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Fuel Additives & Fuel Economy Abstracts - Southwest Research ...

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