Steel Air Tank,Pressure Air Tank Compressor,High Pressure Air Tank Compressor,Air Compressor Vs Air Tank Jiangsu Minnuo Machinery Manufacturing Co., Ltd. , https://www.minnuoindustry.com
It has been stressed that Cummins, which only uses EGR emissions aftertreatment systems on heavy-duty diesel engines and uses SCR emissions aftertreatment systems on medium-sized diesel engines, began to change its direction.
Cummins has publicly stated that it will use SCR on heavy-duty diesel engines to meet the 2010 EPA 2010 emission standards (equivalent to Euro VI). According to the relevant person in charge of Cummins, the advantage of SCR is that this technology will improve the fuel economy of the vehicle. Therefore, the use of SCR in heavy-duty diesel engines will result in a significant increase in the fuel economy of Cummins products, which in turn will reduce the operating costs of users.
Cummings defeats Navistar alone
After Caterpillar withdrew from the heavy-duty engine market and Cummings fought against SCR, currently only Navistar International Corp. in the US is alone in the EGR field. It is understood that Navistar will cooperate with particulate filter (DPF) on the basis of EGR to achieve EPA 2010 through high-pressure fuel injection technology without any post-treatment of nitrogen oxides.
In June of this year, Caterpillar announced to the outside world that it will withdraw from the expressway truck engine market in 2010 and instead cooperate with Navistar to develop the truck business in the global market. Two months later, Cummins publicly stated that it will introduce SCR technology on heavy-duty diesel engines. They believe that the use of SCR technology will further improve the effectiveness of energy conservation and emission reduction.
When Caterpillar announced its withdrawal from the North American truck engine market, analysts predicted that Caterpillar's strategy will lead to a more concentrated North American truck engine market share, Cummins, Navistar, Paka and Daimler (North America ) will benefit from this.
Why Cummins?
In the 1990s, to meet North American EPA 1998 emission standards at the time, heavy-duty diesel engine suppliers adopted EGR technology; with the implementation of the EPA 2002 standard, manufacturers disagreed on the emission upgrade technology route, and Cummins and other companies adopted CEGR technology upgraded based on EGR; in 2007, Cummins continued to optimize CEGR technology and launched a diesel engine that meets EPA 2007 emission standards as scheduled. Cummins once firmly stated that the use of EGR technology on heavy-duty diesel engines is why this time?
Perhaps it is the pressure of high oil prices.
Since 2008, international oil prices have remained high and climbed to US$147/barrel. Fuel economy has become the focus of engine companies. It is understood that SCR has higher fuel economy than EGR, and test data shows that the fuel economy of an engine using SCR is increased by about 3%. Therefore, some analysts believe that Cummins is using SCR on heavy-duty diesel engines for this purpose.
However, another said that the reason for Cumming’s reversal lies in the bottleneck of EGR technology advancement, but Steve Charlton, Cummins’s heavy-duty engine division, denied this claim.
Market decides the technical route
In the development of SCR, many difficulties still remain. The establishment of some infrastructure necessary for urea supplementation and distribution of urea have all become reasons for SCR opponents. Recently, a related association in the United States held a meeting to discuss how to complete some of the infrastructure required for urea filling.
Another factor hindering the development of SCR technology is the price of urea. The European Union started to use SCR technology earlier. From the latest statistics, the urea and Ad Blue required for SCR technology are rising in price, and Ad Blue is already in short supply.
The "Commercial Automotive News" reporter learned that during the implementation of the US Emission Standard, the dispute between EGR and SCR has never stopped. Even though the US National Environmental Protection Agency has emphasized SCR as a designated development technology a few years ago, there are still Manufacturers insist on using EGR.
In fact, neither EGR nor SCR will be the technical end point. With the increasing demand for automobile emissions from relevant organizations, the corresponding technologies will become more and more advanced. Perhaps in the subsequent Euro VI era, SCR will be replaced by new technologies.
View related topics: Cummins - world-class engine manufacturer
Cummins Inverted Gome Engine Company Favored