Results 141 to 150 of about 1,268 (175)

Improving the Precision of the HFRR Lubricity Test

SAE Technical Paper Series, 2006
<div class="htmlview paragraph">Researchers and cooperative groups worldwide conducted research and developed several test methods to gauge the lubricity of diesel fuel. This was necessary because the more recent fuel specifications require a higher level of hydrotreating which in turn can result in a reduction of diesel fuel lubricity.
Manuch Nikanjam, Jim Rutherford
openaire   +1 more source

Methodology of Lubricity Evaluation for DME Fuel based on HFRR

SAE Technical Paper Series, 2011
<div class="section abstract"><div class="htmlview paragraph">The methodology of lubricity evaluation for DME fuel was established by special modified HFRR (High-Frequency Reciprocating Rig) such as Multi-Pressure/Temperature HFRR (MPT-HFRR).
Mitsuharu Oguma, Shinichi Goto, Tadanori Yanai, Yasuhiko Mikita   +3 more
openaire   +1 more source

Loss of Electric Power Supply Transient in an Irradiation Test Loop of HFRR

Lecture Notes in Mechanical Engineering
Amitanshu Mishra, Paban Kumar Guchhait, Samiran Sengupta   +2 more
exaly   +2 more sources

Pushing the Boundaries of the HFRR: Impact of Increased Test Severity on Wear

SAE Technical Paper Series, 2013
<div class="section abstract"><div class="htmlview paragraph">The high frequency reciprocating rig (HFRR) was developed in the early 1990s as a test method to assess diesel fuel lubricity in order to provide wear protection for fuel injection pumps.
Ben Hornby, Georgina Cuckston, Rinaldo Caprotti, Iain More   +3 more
openaire   +1 more source

Determining the Sensitivity of Fuel Lubricity Additive Concentration on HFRR Test Parameters

Materials Performance and Characterization, 2018
Abstract In diesel engines, fuel pumps and injectors are subjected to tremendous pressures that can reach upward of 200 MPa in modern systems. In order to generate and maintain this level of pressure, the internal pump and injector components are made to an exacting standard.
Gregory A. T. Hansen, Peter M. Lee, Steven R. Westbrook, George R. Wilson   +3 more
openaire   +1 more source

Evaluation of ball and disc wear scar data in the HFRR lubricity test

Lubrication Science, 2007
AbstractThe high‐frequency reciprocating rig (HFRR) lubricity tester has become a widespread method for determining the lubricity of diesel fuels. The test is a ball‐on‐disc method, in which a steel ball scrapes over a steel disc immersed in the liquid to be tested. According to standards, the wear scar generated on the ball, in the form of the average
openaire   +1 more source

Diesel Fuel Lubricity Comparisons with HFRR and Scuffing Load Ball-on-Cylinder Lubricity Evaluator Methods

SAE International Journal of Fuels and Lubricants, 2014
<div class="section abstract"><div class="htmlview paragraph">Diesel fuel requires sufficient lubricity to prevent excessive wear in fuel injection equipment. The processes for removing sulfur from diesel fuel also eliminate compounds that are responsible for its lubricating properties.
Kalle Lehto, Aki Vepsäläinen, Ulla Kiiski, Markku Kuronen   +3 more
openaire   +1 more source

Diesel Fuel Lubricity Comparisons with HFRR and Scuffing Load Ball-on-Cylinder Lubricity Evaluator Methods, part II

SAE Technical Paper Series, 2015
<div class="section abstract"><div class="htmlview paragraph">The sulphur level of diesel fuels began to be limited in Europe at the end the 20th century. Quite soon after that it was noticed that the processes for removing sulphur also removed other polar compounds and the natural lubricity of the diesel fuel was lost.
Markku Aaro Kuronen, Ulla Kiiski, Kalle Lehto   +2 more
openaire   +1 more source

Diesel fuel. Assessment of lubricity using the high-frequency reciprocating rig (HFRR)

2013
  +6 more sources

Characterization of wear in images of samples from the HFRR test

Proceedings of the 26th International Congress of Mechanical Engineering, 2021
Maxwell Jácome, José Josemar de Oliveira Júnior   +1 more
openaire   +1 more source