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In early 2020, UK-based independent testing firm Emissions Analytics published a study claiming that tire particulate wear emissions were 1,000 times worse than exhaustemissions ( earlier post ). —Emissions Analytics. Quoting such ratios, however, needs careful interpretation.
However, during development, the project team was able to exceed the program expectation for engine-out NO x and exhaust temperature control in the catalyst warm-up mode and concluded that the tailpipe NO x targets can be met without the close coupled light-off SCR. Configuration of the downstream underfloor ATS unit.
Exhaust particle size distributions measured by ELPI (color map) and particle concentration measured by CPC (white line) during individual engine braking conditions (speed change from 32 km/h to 0 km/h). The exhaust sample was taken from the exhaust manifold. The exhaust sample was taken from the exhaust manifold.
Summary of significant emissions results from the fuel testing. Given equivalent deployment of butanols and ethanol, the results suggest emissions of unburned alcohols would decrease, but carbonyl emissions would increase; some of these compounds have poorly understood health effects, they note. Credit: ACS, Ratcliff et al.
In a US Department of Energy (DOE)-sponsored project, engineers at Cummins are developing a Tier 2 Bin 2 emissions compliant diesel for application in a light duty pickup (ATLAS, Advanced Technology Light Automotive Systems, earlier post ). US Light Duty Diesel Emission Standards (full useful life: 150,000 miles).
There is no immediate concern for copper resources, but the average ore grade is declining as higher grade deposits become exhausted. In light of the sheer scale of the hydrogen challenge, several questions demand close consideration. The NWIS comprises mostly gas-fired generation and has a GHG emission factor of 620 g CO 2 -e kWh -1.
IAV has developed a particularly closed-coupled diesel exhaust gas aftertreatment (EAT) system. A key contribution to this performance must come from the exhaust gas aftertreatment system—across the entire speed and load range. This way, exhaust gas flows through DOC and SCRF before it enters the turbine. Click to enlarge.
One of its outstanding features is the in-line six, which meets the EU Stage V emission standard for locomotives without the need for an exhaust after-treatment system (EATS). This means that a single technical solution equally covers emission requirements for all currently recognised emissions threshold values up to EU Stage V.
It is the only diesel engine operating on the road capable of meeting CARB’s 2027 regulation, which requires a 90% reduction in emissions of NO x compared to current standards. The catalyst light-off mode delivers the capability that allows Achates to manage extremely low engine-out NO x and also very high exhaust gas temperatures.
Corning Incorporated has boosted its light-duty vehicle filter capacity at its manufacturing facility in Kaiserslautern, Germany for both gasoline and diesel engined vehicles. Diesel vehicle manufacturers are striving for greater engine performance and fuel economy while meeting Euro 6 emissions standards under a myriad of driving conditions.
With SCR twin dosing technology in the exhaust gas system, the diesel unit now undercuts the Euro 6d emission standard limits while also running quietly and smoothly, according to the company. In 2015, the emissions scandal erupted over the use of defeat devices in Volkswagen engines for MY 2009 through 2015.
By using light-activated quantum dots to fire particular enzymes within microbial cells, the researchers were able to create “living factories” that eat CO 2 and convert it into products such as biodegradable plastic, gasoline, ammonia and biodiesel. Therefore, these resting cells function as nano-microbial factories powered by light.
The EPA has issued a new rule governing the exhaustemissions of passenger cars and light duty trucks but red states have sued to block it. The post Repugnican States Sue To Block Already Weakened ExhaustEmissions Rules appeared first on CleanTechnica.
Volkswagen has launched a new range of diesel engines (TDI) characterized by extremely low nitrogen oxide emissions (NO x ). The Touareg V8 TDI, generating 310 kW (421 PS) ( earlier post ), is among the first Volkswagens to feature an exhaust purification system that brings NO x to these low level: it emits between just 0.01
A study by a team from UC Riverside has assessed the potential of increasing ethanol content in California reformulated gasoline (CaRFG) by investigating the exhaustemissions from a fleet of 20 Tier 3 light-duty vehicles. Acetaldehyde and ethanol emissions responded strongly with ethanol across the fleet of 20 vehicles.
The global economic recession of 2008—which severely depressed light-duty vehicle sales—resulted in an increase in the age of the light-duty vehicle fleet in the US that likely slowed the rate of decrease of fleet average emissions, according to a study by Gary Bishop and Donald Stedman at the University of Denver.
Based on on-road measurements in their study, a team from the University of California Berkeley has estimated that, as of 2010, light-duty (LD) gasoline vehicles were responsible for 85% of CO; 18% of NO x ; 18% of organic aerosol (OA); and 6% of black carbon (BC) emissions from on-road motor vehicles in the United States.
A study by European researchers has found that two-stroke (2S) scooters, although constituting a small fraction of the fleet, can dominate urban vehicular pollution through organic aerosol and aromatic emission factors up to thousands of times higher than from other vehicle classes. Emission factors (EFs) from scooters and other vehicles.
Power management company Eaton and Tenneco announced a joint development agreement between Eaton’s Vehicle Group and Tenneco’s Clean Air business group to produce an integrated exhaust thermal management system that will enable commercial truck and light vehicle manufacturers to meet upcoming emissions regulations.
In-use testing of three light duty diesel vehicles—certified to US-EPA Tier2-Bin5 and California LEV-II ULEV emissions limits— found a wide variation in real world emissions performance relative to the regulatory limits. diesels and one 3.0L diesel) over pre-defined test routes exhibiting diverse driving conditions.
Researchers have used a novel near-infrared light imaging technique to capture the first cross-sectional images of carbon dioxide in the exhaust plume of a commercial jet engine. The researchers used their new chemical species tomography setup to capture the first images of carbon dioxide exhaust from a commercial aircraft engine.
In a paper presented at the 2019 Vienna Motor Symposium this week, Delphi Technologies will unveil a new 500+ bar GDi system that can reduce particulate emissions by up to 50% compared to state-of-the-art 350 bar system without expensive engine design modifications. Delphi 500+ bar GDi pump. Delphi 500+ bar GDi injector. —Walter Piock.
A team led by researchers from Oak Ridge National Laboratory (ORNL) is developing a lower-cost cast aluminum (Al) alloy capable of at least a 50 ˚C temperature increase over the current cylinder head alloys 319 and 356 for use in light duty engines. Materials for exhaust and energy recovery.
Southwest Research Institute (SwRI) announced preliminary test results of its Dedicated-Exhaust Gas Recirculation (D-EGR) demonstration vehicle ( earlier post ) at the SAE 2014 World Congress in Detroit. Terry Alger, assistant director in SwRI’s Engine, Emissions and Vehicle Research Division. Overall, the engine offered a 13.1%
The result is a set of usable conversion factors for distance-based CO 2 emissions among the different driving cycles. For the study, the ICCT team simulated CO 2 and efficiency results over the test cycles for a variety of vehicle and technology packages using a vehicle emission model developed by Ricardo Engineering.
Exhaust gas after-treatment paired with innovative features inside the engine enables the GTI engine to meet the new EU 6AG (Euro 6d-TEMP) emission standard. One key aim when developing the new TSI was to ensure the lowest possible emissions. The fuel consumption and emission levels of the up! The 85 kW / 115 PS 1.0
-alumina supports along with a small amount of lanthanum oxide can efficiently turn the carbon monoxide in automotive exhaust into carbon dioxide at temperatures as low as 40 ?Celsius, C as a target for achieving removal of pollutants from exhaust. Atoms are: oxygen/red, aluminum/gray, palladium/dark blue, and lanthanum/light blue.
The e-catalyst enables lowest emissions in real operation—something that is becoming increasingly important in light of forthcoming regulations such as Euro 7. The challenge of plug-in hybrids: CO 2 efficiency and low cold engine start emissions. —Rolf Brück, head of Catalysts and Filters at Vitesco Technologies.
The results represent a light-load indicated efficiency improvement of 15-30% (up to 40.9%). The test engine for the paper was a 250cc single-cylinder unit with dual-camshaft-actuated reciprocating sleeve valves for induction and exhaust. There is no ISFC improvement at high load. Click to enlarge.
a new 5-liter V8 diesel engine designed to power pickup-and-delivery vehicles, other light- and medium-duty trucks, school buses and motorhomes. will serve customers in the United States and Canada, and will be certified to US EPA 2013 NO x and PM emissions levels. The new ISV 5.0 Click to enlarge. Cummins Inc. introduced the ISV5.0,
PM mass emissions rates for the FTP and US06 drive cycles as function of vehicle mileage. The efficiency advantage is not as large as with diesel engines, making use of gasoline particulate filters (GPF) a less practical solution to PM emissions aftertreatment. Credit: ACS, Maricq et al. Click to enlarge. Earlier post.)
The transportation sector was responsible for over 7 million tons of NO x emissions in the US in 2014, with 50% of this sector’s NO x attributed to heavy-duty on- and off-road vehicles and equipment. CO 2 and NO x certification test data for heavy-duty diesel engines certified from 2002 through 2019. Source of data: US EPA (2019).
Different chemical structures absorb light at specific wavelengths, producing unique spectral fingerprints. The combination of technologies provides simultaneous FTIR and mass spectrometry data, allowing accurate and rapid identification of exhaust stream components. Real-time information is important,” Seuser said.
Top: Gravimetric PM mass, PM mass calculated based on the IPSD method, black carbon, and EC/OC emissions over the LA92 cycle. Bottom: Total particle-phase PAH emissions, expressed in ng/mile, for both test vehicles over the LA92 cycle. Yang et al. Click to enlarge.
Below this GVW the technology has already been acquired by Valeo as a supercharger for cars and light commercial vehicle applications. Unlike a turbocharger, Cobra is not dependent on the exhaust gases flowing to do its work. Earlier post.) The benefits of Cobra to the engine developer and end user depend on the application.
Run with an ethanol/1-octanol combination, the MCC system achieves a large reduction in soot-emissions, even at very low NO x -levels below 0.1 The MCC system achieves a large reduction in soot-emissions, even at very low NOx-levels below 0.1 An open-access paper on the work is published in the journal Fuel. —Honecker et al.
Five technology paths for very-low-NO x and GHG emissions from heavy-duty natural gas engines. The “Pathways to Near-Zero-Emission Natural Gas Heavy Duty Vehicles” report, authored by GNA on behalf of Southern California Gas Co. An 80% reduction of GHG emissions is targeted for 2050, relative to 1990 levels. Click to enlarge.
These areas of interest apply to light, medium and heavy duty on-road vehicles. Applications need to use an integrated approach to design, develop, and optimize an assembly consisting of what would have been at least four light duty vehicle components made from traditional metals.
In the spring 2014, the GasOMeP project (Gasoline Vehicle Emission Control for Organic, Metallic and Particulate Non-Legislative Pollutants) got underway. The carcinogenic potential in one cubic meter of exhaust gas from gasoline direct injectors is up to 1,700 times higher than the EU limit for clean air. Click to enlarge.
Researchers at Oak Ridge National Laboratory (ORNL) have developed a ternary mixed oxide catalyst composed of copper oxide, cobalt oxide, and ceria (dubbed “CCC”) that outperforms synthesized and commercial platinum group metal (PGM) catalysts for CO oxidation in simulated exhaust streams while showing no signs of inhibition—i.e.,
Such heavy-duty vehicles (HDVs) are responsible for around a quarter of CO 2 emissions from road transport in the EU. Without action, HDV emissions in 2030-2050 are projected to remain close to current levels. The Commission has developed a computer simulation tool, VECTO, to measure CO 2 emissions from new vehicles. Background.
Operation with natural gas or biomethane makes the compact model economical and more climate-friendly with low emissions. Its turbocharger with variable turbine geometry makes optimal use of the exhaust gas energy for early and harmonious torque development. Lower costs, lower emissions. The A3 Sportback 30 g-tron 1.5
Researchers at the National Institute of Standards and Technology (NIST) and their colleagues have demonstrated a room-temperature method that could significantly reduce carbon dioxide levels in fossil-fuel power plant exhaust, one of the main sources of carbon emissions in the atmosphere.
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