By Samubar - 25.02.2020
Wcx digital summit 2020
Sign-up now to watch a replay of our previously held SAE Leadership Roundtable Series webcasts originally scheduled for WCX World Congress. Title, WCX Digital Summit. Dates, June Location, Online & On-Demand Event. Organised by, SAE International.
The following summary details a number of WCX wcx digital summit 2020 of which, wcx digital summit 2020 not all, were presented at the Digital Summit—on wcx digital summit 2020, engine emissions, and related technologies. Please log in to view the full version of this article subscription bitsler 2020. The stage was set for these topics by Ameya Joshi of Corning, who presented a review of recent regulatory and technical developments in vehicle efficiency and emission control technologies .AUTOCOM DIGITAL SUMMIT 2020 17.08
The EU CO2 targets have attracted a lot of attention due to their EV-forcing character, but they also drive advancement in internal combustion engines.
In both regulations, the focus is to ensure low emission levels for NOx and other pollutants under all real driving conditions, including slow urban driving.
A number of regulatory changes are considered in Europe. Wcx digital summit 2020 before the Euro 7 stage, the particle number measurement will likely be modified to include smaller particles, down to 10 nm from the current 23 nm.
PFI engines can produce high PN emissions, especially in hybrid powertrains, due to frequent engine stop-starts.
If an NH3 emission limit is adopted, gasoline engines may require a passive SCR catalyst or an wcx digital summit 2020 slip catalyst. High Efficiency Engines The summit included a number of presentations on high efficiency engine concepts and various approaches to improving link efficiency.
The focus of most here these papers was for light-duty SI engines. Hybridization offers opportunities to wcx digital summit 2020 improve ICE efficiency.
For example, wcx digital summit 2020 speed torque requirements in SI engines are commonly met through compromises such as reduced compression ratio that affect efficiency over the entire engine map. With a hybrid drive powertrain, even 5 kW of crankshaft link at these low speeds can reduce the low speed torque required from the ICE that can enable the wcx digital summit 2020 of a higher compression ratio and allow the turbocharger to be re-optimized.
Near rated power conditions, the re-optimized wcx digital summit 2020 can lower residual gas fraction and allow combustion phasing to be advanced and enrichment to be reduced to considerably lower fuel consumption and CO emissions while maintaining rated power and exhaust temperature limits.
Figure 1. Thus, while the Hybrid EV strategy may be appropriate for vehicles continue reading under relatively light engine loads such as that experienced by passenger vehicles in urban driving, the Hybrid Boost strategy can provide larger fuel economy gains for highly loaded vehicle operation.
GM is developing a pragmatic engine concept that maximizes wcx digital summit 2020 and minimizes pollutant emissions through aggressive downsizing, exhaust energy recovery and a multi-mode combustion system .
WCX Digital Summit
The design has 3-cylinders of which wcx digital summit 2020 provide power while the third one is used for exhaust compounding, Figure 2. Brake thermal efficiency BTE of The peak efficiency was obtained over a wide load range relevant for typical drive cycles.
Figure 2. From about bar BMEP, the combustion process is based on a double injection strategy that creates into a quasi-homogeneous background, a richer region that is ignited by the spark-plug mixed-mode combustion.
ADL Presence in SAE WCX Digital Summit
Combustion of the richer region wcx digital summit 2020 the temperature and pressure in the cylinder and triggers autoignition of the background mixture.
Combustion phasing is controlled by varying the NVO duration and in the low load region of mixed mode combustion, spark timing can be varied as well. A low-lift cam profile is used for the intake and exhaust and the expander cylinder is bypassed during NVO operation.
At about 5. Simultaneously, exhaust from the wcx digital summit 2020 cylinders go here directed into the expander cylinder.
Under these conditions, exhaust re-breathing is used wcx digital summit 2020 stabilize combustion.
In the higher load range of mixed-mode combustion, rebreathing is no longer required. While dilute combustion wcx digital summit 2020 use a Michigan Technological University and Roth Engine Science summarized simulation results for an example implementation of the true Atkinson Cycle using a multi-link mechanism in a light-duty SI engine .
Autonomous Vehicle Engineering - September 2020 - 28
At light to medium load conditions, the efficiency benefit derives almost exclusively from overexpansion. However, at higher loads, additional benefits arise because spark timing can be better optimized for efficiency wcx digital summit 2020 avoiding knock.
This compares with At higher loads, a third benefit arises from the ability to meet exhaust temperature limits with little https://obzor-catalog.ru/2020/bitcoin-mining-roi-2020.html no enrichment.
Drone 2020 overexpansion concept proposed by EcomanIQ uses deactivated cylinders to achieve overexpansion at part load .
At part load conditions https://obzor-catalog.ru/2020/lol-worlds-2020-opening-ceremony.html some cylinders can be deactivated, the non-firing cylinders are used to further expand wcx digital summit 2020 gas from the firing cylinders.
In a second paper using a passive prechamber, stoichiometric operation over the entire engine load range was targeted while keeping engine cost increases to a minimum .
The concept used increased compression ratio, Miller cycle valve timing and low pressure EGR, port fuel injection and a variable geometry turbocharger.
When optimized as an engine for a hybrid vehicles using a A paper by the University of South Australia demonstrated some interesting aspects of exhaust waste heat recovery for a stationary genset .
They carried out some detailed sizing calculations for the WHR system for wcx digital summit 2020 1.
New crypto 2020 wcx digital summit 2020 The wcx digital summit 2020 of the genset is about Thermal Management Thermal management strategies will be critically important for meeting the proposed California lower NOx emission standards for heavy-duty engines.
The LLC cycle provides very little enthalpy to the aftertreatment system—in fact, the exhaust produced during low load operation will actively cool down components that were initially warm.
Research at the SwRI—conducted as part wcx digital summit 2020 the low NOx diesel engine demonstration for California—strongly suggests the NOx emission targets can be met using a dual dosing SCR configuration in combination with cylinder deactivation CDA and additional como conseguir bitcoins 2020 measures to ensure rapid engine warming after cold start  .
Aftertreatment aging is still on-going and please click for source results should be available later this year.
Tenneco conducted a simulation study of a heavy-duty aftertreatment system, and proposed an alternative thermal management approach to meet the California lower NOx emission standards . Two thermal management strategies were examined, including a mini fuel burner and an electric exhaust heater.
The very ripple stock forecast wcx digital summit 2020 thanks burner was able to meet the system objectives on the LLC cycle while utilizing an wcx digital summit 2020 7.
On-Demand Technical Presentation Topics
When the mini-burner was combined with CDA, the fuel consumed by the mini-burner was reduced by 2. The electric exhaust heater, even though limited in maximum power relative to the mini-burner, was also able to satisfy the thermal wcx digital summit 2020 of the LLC cycle.
These wcx digital summit 2020 suggest that the combination of mini-burner or an electric heater and CDA may present a viable alternative to the configuration proposed by the SwRI. Of course, the mini-burner consumes more fuel than cylinder deactivation which actually saves fuel.
However, Wcx digital summit 2020 alone is insufficient during cold start, and the additional engine measures that must be used to heat the aftertreatment system may very well consume more fuel than the mini-burner. In addition to the conventional heavy-duty aftertreatment configuration, the Tenneco study also includes an https://obzor-catalog.ru/2020/rx-570-mining-2020.html of a system with dual click here SCR.
Three cylinders were deactivated using a calibration that was part of some initial performance development activity for the SuperTruck II program. For most of the low load cycles tested, the engine operated in CDA mode for most of the cycle.
The results presented were for warmed-up engine operation—i. The highest NOx and CO2 reductions tended wcx digital summit 2020 be found for wcx digital summit 2020 cycles that operated at the lowest loads.
For the heavy-duty systems being developed, CDA is unable to significantly accelerate aftertreatment system warm-up after a cold start and more conventional strategies that also consume significant amounts of fuel may still be required for wcx digital summit 2020 task.
Using a light duty 4-cylinder SI engine 1. DSF increases the load on the firing cylinders and allows more combustion phasing retard before combustion instability becomes too high.
The higher cylinder load also allows intake cam phasing to be advanced wcx digital summit 2020 increase residual fraction and provide some wcx digital summit 2020 benefits without degrading combustion stability.
All of the tested, aged configurations could comfortably meet the relevant PN as well https://obzor-catalog.ru/2020/bitcoin-memes-2020.html HC emission limits. Bigger TWC volume i.
High Efficiency Engines
An interesting case study by Cummins evaluated the catalytic performance wcx digital summit 2020 a sulfur-poisoned Cu-SSZ SCR catalyst that had been exposed to high sulfur diesel fuel . It was found that both physical poisoning by ammonium bisulfate ABS and chemical poisoning Cu-S species contributed to the reduced NOx wcx digital summit 2020.
Catalyst activity could be partially restored after exposure to high temperatures.AUTOCOM DIGITAL SUMMIT 2020 18.08
Industrial Power Alliance and the University of Wcx digital summit 2020 investigated EGR cooler deposits from non-road diesel fueled equipment . The EGR coolers from construction vehicles that had accumulated over 10,h of operation were removed and analyzed.
They discovered that the density of the field aged deposit samples was over 5 times higher when compared to typical samples wcx digital summit 2020 on an engine bench visit web page that the mass and density of deposits at the outlet end of the cooler was greater wcx digital summit 2020 at the inlet side.
In most cases, the outlet deposits contained a higher proportion of volatiles.
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