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

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Fleet and Field EvaluationsTopic:Point of Contact:Test Objective:Vehicle:Test Procedure:<strong>Fuel</strong> Requirement:Duration:Test Results:Intake Valve StickingTest (Vanagon)Larry EckhardtPhone: (210) 522-2980Fax: (210) 684-7523The objective of this test is to test fuel performance in theprevention of intake valve sticking at low temperature.The vehicle used in this test is a 1991 VolkswagenVanagon vehicle with 2.1-L four-cylinder engine and fourspeedtransmission.1. This 13-cycle dynamometer test consists of 6 minutesat 1,500 rpm, 5 minutes at 1,700 rpm, followed with a10-minute hot soak for each cycle.2. This is followed by 16 hours of cold soak at 0°F.3. Cylinder pressures are measured during three coldcranks at cold temperature.4. Steps 1-3 are repeated during the next two days.The fuel requirement for this test is 25 gallons.Duration is 2 weeks.(PASS/FAIL) A fuel passes the test if the crankingcompression of each cylinder is over 100 psi following thethree-day evaluation.Note:4SOUTHWEST RESEARCH INSTITUTESan Antonio, TexasJuly 2010
Topic:Point of Contact:Test Objective:Vehicle:Test Procedure:<strong>Fuel</strong> Requirement:Duration:Test Results:Intake Valve StickingTest (GM 5.0L V-8)Larry EckhardtPhone: (210) 522-2980Fax: (210) 684-7523The objective of this test is to test fuel performance in theprevention of intake valve sticking at low temperature.The vehicle used in this test is a 1990-1995 GMC-1500pickup truck with a 5.0-liter eight-cylinder engine withautomatic transmission.1. The 60-minute driving cycle consists of 56 minutes at55 mph and a 3-minute idle period. The remainingone minute is required to accelerate and deceleratethe engine and drivetrain during the driving period.The driving cycle is repeated three more times duringeach day for an approximate total mileageaccumulation of 200 miles.2. The driving cycle is followed by 16 hours of cold soakat –4 degrees F.3. Cylinder pressures are measured during three coldcranks at cold temperature.4. Steps 1-3 are repeated during the next two days.The fuel requirement for this test is 50 gallons.Duration is 2 weeks.(PASS/FAIL) A pass shall result in no stuck valves duringany of the three cold starts. A stuck valve is defined asone in which the cylinder pressure is less than 80% of thenormal average cylinder compression pressure.Note:5SOUTHWEST RESEARCH INSTITUTESan Antonio, TexasJuly 2010
Page 3 and 4: QUALITY CERTIFICATIONSThe Fuels and
Page 6 and 7: Diesel EmissionsTopic:Diesel Fuel Q
Page 10 and 11: Topic:Truck Fuel EconomyImprovement
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Page 16: Topic:Vehicle Driveability TestingP
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Page 23 and 24: Light- and Heavy-Duty Vehicle Emiss

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