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Good article and I agree 110%. Diesel isn't going anywhere anytime soon. They may be trying to in one state, but as a whole, I believe we will see diesel electric hybrids before the actual death of diesel technology.
Good article and I agree 110%. Diesel isn't going anywhere anytime soon. They may be trying to in one state, but as a whole, I believe we will see diesel electric hybrids before the actual death of diesel technology.
which actually confirms my feelings on the latest DI gasoline engines: that they, too, emit soot particles into the air through their exhausts. I've always wondered why the exhaust tips of modern gas vehicles are black. I once saw an accelerating gas car emitting black stuff out of the exhaust. If diesel vehicles are in the minority of current vehicles in personal use in this country, then due to their overwhelming majority, they then possibly have to be polluting more than our diesel powered trucks and other diesel vehicles. JMHO.
From the article:
Although today's passenger vehicle engines are cleaner than ever before, their exhaust can still contain significant numbers of nanoscopic soot particles that are small enough to penetrate the lungs and bloodstream. This new computer model should help car makers improve their engines to cut soot formation.
Gasoline engines are not traditionally associated with soot—it's a problem usually linked with diesel vehicles. But over the last decade, to boost fuel efficiency, manufacturers have made their gasoline engines more diesel-like, adopting "direct injection" technology that sprays fuel directly into the engine cylinder.
"Sometimes you get fuel-rich pockets where there's not enough air for complete combustion or sometimes the fuel hits the cylinder wall and forms a pool fire," said S. Mani Sarathy from the KAUST Clean Combustion Center, who co-led the work. Both of these scenarios generate soot.
A new study led by Empa scientists finds that some direct-injection gasoline engines emit just as many soot particles as unfiltered diesel cars did in the past. Particle filters can remedy this.
Worldwide, three new cars roll off the line every second – that's 73 cars and 18 million utility vehicles per year. Most run on gasoline. In industrialized nations, the trend is moving towards so-called downsizing engines: smaller but with direct gasoline injection and turbocharging. This technology is more environmentally friendly and saves fuel, according to manufacturers. Experts estimate that by 2020, 50 million of these direct-injection gasoline engines will be running on the roads across Europe, and researchers are now studying the cocktail of exhaust emissions from these engines.
Researchers of the GasOMeP project, along with collaborators, selected seven direct-injection gasoline cars, including a Mitsubishi Carisma (2001 model, exhaust emission standard Euro 3). The other vehicles were all built between 2010 (VW Golf, Euro 4) and 2016 (Citroën C4, Euro 6b). By way of comparison, a current Peugeot 4008 (2013, Euro 5b) with a diesel engine and a particle filter was also included. All the vehicles were tested based on the WLTP cycle (Worldwide Light-Duty Vehicles Test Procedure), which will be mandatory for newly licensed models as of September 2017 (see p. 10).
The results were sobering: Every single one of the tested gasoline cars emitted 10 to 100 times more fine soot particles than the diesel Peugeot. Under the microscope, the particles from the gasoline engines were similar in size to the soot particles that had given diesel a bad name: primary particles measuring 10 to 20 nanometers in size, which congregate into particle agglomerates measuring 80 to 100 nanometers before leaving the exhaust. "Once inhaled, these particles remain in the body forever," explains Norbert Heeb. The evidence shows that they can penetrate the membrane of human alveoli in the lungs and thus get into the bloodstream.
However, the particles are not the only problem, as Heeb is well aware: "Liquid or solid chemical toxins from the combustion process, including polycyclic aromatic compounds, accumulate on the surface of the particles, which can then smuggle these substances into the bloodstream – like a Trojan horse."
This came across my Goggle feed today. I know it's a competitor's engine but to sum up my feelings and thoughts that diesel AIN'T going anywhere anytime soon. Scr*w the tree huggers!
This came across my Goggle feed today. I know it's a competitor's engine but to sum up my feelings and thoughts that diesel AIN'T going anywhere anytime soon. Scr*w the tree huggers!
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
