New research seeks to improve sensors that monitor diesel fuel quality

Jul 26, 2010

Sensors currently used to monitor the quality of diesel fuel and biodiesel blended fuels during engine operation are unable to adequately detect certain important fuel quality concerns. Alan Hansen, professor of agricultural and biological engineering at the University of Illinois, and his colleagues are working to develop new technologies to improve these commercially-available sensors.

"Our research is contributing to the development of a sensor that, when placed in the fuel line prior to where the fuel enters a diesel engine, can detect if there are any contaminants in or other problems with the fuel," Hansen said. "Also, if biodiesel is used, the sensor would determine the quality and quantity of biodiesel entering the engine."

Biodiesel, a derived from natural oils like , is typically blended at 2 to 5 percent with regular .

"In some cases, engine manufacturers will support warranties on engines using higher percentages of biodiesel—up to 20 percent. However, they are reluctant to support engines running too much biodiesel because there is some concern that it would affect the engine in a negative way," Hansen said.

Hansen is investigating the use of electrochemical sensors to detect contaminants and other quality issues that today's sensors are missing. By using electrochemical processes, the sensors are expected to be significantly more sensitive to the of diesel fuel.

"Electrochemical sensors can be designed to detect specific chemicals, such as sulfur or sulfur-based compounds," he said. "One could then create a system to warn the operator or shut down the engine when the fuel has high sulfur content."

Sulfur is an important contaminant to monitor in diesel fuel, as it can contribute to the release of harmful exhaust emissions. Sulfur damages the catalysts in filters that are part of the engine's after-treatment system. Such filters are needed to comply with the Environmental Protection Agency's (EPA) strict regulations on emissions levels.

"To stay within the EPA's emissions limits, it is no longer possible to simply optimize the combustion process. We now have to capture some of the emissions after the engine, using filters or other methods," Hansen said.

Hansen also noted that when sulfur is involved in the combustion process, it creates sulfuric acid, which is a very corrosive by-product that can damage the engine.

"We've run tests to evaluate how well current sensors work with a range of different fuels, including biodiesel blends. The tests have shown us the limitations of the sensors," Hansen said. "If we can improve these sensors to successfully detect sulfur and monitor other diesel fuel quality concerns, it will be an important breakthrough."

Explore further: Lifting the brakes on fuel efficiency

add to favorites email to friend print save as pdf

Related Stories

EPA mandates ultra-low-sulfur diesel fuel

Jun 05, 2006

The Environmental Agency has quietly issued a rule requiring U.S. oil refineries to produce ultra-low-sulfur diesel fuel to substantially reduce emissions.

Biodiesel fuel use growing steadily

Jul 03, 2006

Biodiesel fuel, a renewable energy source, is beginning to integrate into the U.S. farming and trucking industries, the San Francisco Chronicle says.

Engineer works to clean and improve engine performance

Sep 17, 2008

The five engines in Song-Charng Kong's Iowa State University laboratory have come a long way since Karl Benz patented a two-stroke internal combustion engine in 1879. There are fuel injectors and turbochargers ...

EPA enters partnership with BorgWarner

Apr 18, 2006

The U.S. Environmental Protection Agency says it has formed a partnership with BorgWarner to develop cleaner, more fuel efficient engines and vehicles.

Recommended for you

Lifting the brakes on fuel efficiency

17 hours ago

The work of a research leader at Michigan Technological University is attracting attention from Michigan's Governor as well as automotive companies around the world. Xiaodi "Scott" Huang of Michigan Tech's ...

Large streams of data warn cars, banks and oil drillers

Apr 16, 2014

Better warning systems that alert motorists to a collision, make banks aware of the risk of losses on bad customers, and tell oil companies about potential problems with new drilling. This is the aim of AMIDST, the EU project ...

User comments : 0

More news stories

LinkedIn membership hits 300 million

The career-focused social network LinkedIn announced Friday it has 300 million members, with more than half the total outside the United States.

Researchers uncover likely creator of Bitcoin

The primary author of the celebrated Bitcoin paper, and therefore probable creator of Bitcoin, is most likely Nick Szabo, a blogger and former George Washington University law professor, according to students ...

Impact glass stores biodata for millions of years

(Phys.org) —Bits of plant life encapsulated in molten glass by asteroid and comet impacts millions of years ago give geologists information about climate and life forms on the ancient Earth. Scientists ...