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Technical Paper

Continued Evaluation of Diesel Fuel Lubricity by Pump Rig Tests

1998-05-04
981363
Diesel fuel lubricity has continued to be a topic of interest for the suppliers of diesel engines, diesel fuel injection equipment, diesel fuel and diesel fuel additives. The term “lubricity” has become commonly used to mean the ability of a diesel fuel to prevent or minimize wear in diesel fuel injection equipment systems that rely on the fuel to provide lubrication. Distributor and rotary type injection pumps are examples of systems that rely totally on the fuel for lubrication. These systems are commonly used in light and medium duty diesel engines. Shell Canada has been investigating the lubricity performance of diesel fuels for a number of years. We have continued to evaluate the lubricity performance of various diesel test fuels and additives in a specifically designed distributor type pump rig that has been described previously (1, 2, 3).
Technical Paper

Diesel Fuel Lubricity - Base Fuel Effects

2001-05-07
2001-01-1928
Many modern diesel fuel injection equipment designs rely totally on the fuel to provide lubrication. The ability of a diesel fuel to lubricate diesel fuel injection equipment has become commonly referred to as its “lubricity”. If a diesel fuel has insufficient lubricity then the performance of the fuel injection equipment can be compromised resulting in reduced durability and increased vehicle emissions. We have been studying diesel fuel lubricity since the early 1990s using a test rig. The test rig consists of a motored distributor type fuel injection pump, injectors and a fuel handling/circulation system. This paper reviews test rig results on a total of twenty three different base fuels. The pump test rig results are compared to the inspection properties of the test fuels and conclusions derived.
Technical Paper

Investigation of Diesel Fuel Lubricity and Evaluation of Bench Tests to Correlate with Medium and Heavy Duty Diesel Fuel Injection Equipment Component Wear - Part 1

2002-05-06
2002-01-1700
A study was conducted to investigate the effects of diesel fuel lubricity on diesel engine fuel injection equipment (FIE) wear and failure rates, for diesel fuels with poor to moderate lubricity characteristics, with and without lubricity additives. Five tests were used to evaluate diesel fuel lubricity characteristics: 1) a modified Falex Corporation Ball-on-Three-Disk (BOTD) lubricity test rig; 2) a high-speed Detroit Diesel Corporation (DDC) 8V71T engine test rig operated at maximum load and speed conditions under elevated fuel, coolant and ambient temperatures; 3) a Wärtsilä VASA 9R32, medium-speed, diesel engine electric power generation unit in Iqaluit, Nunavut, Canada, 4) a fuel pump rig (FPR) and 5) a high frequency reciprocating rig (HFRR).
Technical Paper

The Lubricity of Winter Diesel Fuels - Part 3: Further Pump Rig Tests

1996-10-01
961944
The durability and performance of diesel fuel injection equipment in actual use continues to be a concern for the manufacturers of diesel powered equipment, diesel fuel injection equipment suppliers and diesel fuel suppliers This concern has been caused by recent changes to both the equipment and the diesel fuel driven by environmental legislation The term “lubricity” has become commonly used to describe the ability of a diesel fuel to prevent or minimise wear in diesel fuel injection equipment Of particular interest are distributor and rotary type fuel injection pumps that rely totally on the fuel for lubrication These pump types are commonly used in light and medium duty diesel engines Earlier work has shown that fuels with good low temperature properties have inherently poorer lubricity performance than summer quality diesel fuels (1, 2)* Due to the need for such fuels in Canada we have been investigating the lubricity performance of winter diesel fuels for a number of years Most recently we have studied the lubricity performance of various fuels and additives in rotary type pumps and related these results to the test fuel properties, including lubricity as measured in a number of current lab bench tests
Technical Paper

The Lubricity of Winter Diesel Fuels - Part 2: Pump Rig Test Results

1996-05-01
961180
In the last few years there have been sporadic complaints regarding field failures of diesel fuel injection equipment. Upon investigation these complaints have been associated with: i) rotary or distributor type pumps as used in light and medium duty diesel engines, and ii) the use of “winter” grade diesel fuels or diesel fuels that have been altered to meet the requirements of environmental regulations. Rotary and distributor type diesel fuel pumps rely totally on the fuel for lubrication. The fuel's ability to prevent or minimize wear in these types of pumps is important. This ability has recently been referred to as the fuel's “lubricity”. Shell Canada has been investigating this issue for the past few years. Recently we have investigated the “lubricity” performance of various diesel fuels using two diesel fuel pump endurance rigs. One rig consists of two rotary type pumps, the other two distributor type pumps.
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