It is no longer a few months since the implementation of the sixth phase of motor vehicle pollutant discharge standards nationwide on July 1, 2019. I believe that many card friends are planning to change the car. After a few laps in the 4S shop, many card friends said that the car of the sixth country is no different from the car of the country five. In fact, the knowledge in this area is relatively deep. Today, Xiaobian talks with you from the engine level how to meet the national six emission standards.
When it comes to the engine, it has to mention the leading engine of domestic engine--- Weichai . For the sixth country, high horsepower is not the primary goal. Environmental protection is the most important thing. Pollutant emission standards are regulations for vehicle emissions that are designed to reduce pollution and protect the environment. The exhaust gas is produced by the combustion of the fuel through the engine, so the engine plays a vital role in meeting the requirements of the national six emission standards.
Weichai WP13 engine
In terms of environmental protection, Weichai has already been at the forefront of the industry. In 2013, Weichai has successfully passed the Euro VI certification of engine products. As the earliest R&D and supporting enterprise of the domestic six products, Weichai's Guoliu products have been fully positioned at the high end. Whether it is a light engine or a heavy-duty engine, Weichai has a corresponding "customized solution".
WP13 can be said to be a well-known star product in the field of heavy-duty engines. As the leader in the Weichai heavy-duty engine series, WP13 has already made a good start in terms of emission upgrades. At the 2019 Business Annual Meeting, the WP13 prototype exhibited by Weichai uses high-pressure common rail, supercharged intercooler and SCR post-processing. While the power is as strong as ever, this engine adopts an efficient control strategy with minimum fuel consumption. Up to 185g/kWh, the post-treatment conversion efficiency can reach more than 99%. The technical route of DOC+DPF+HiSCR greatly reduces the emission of nitrogen oxides and PM in polluted air.
Weichai WP13 engine
Weichai's other EGR+DOC+DPF+SCR technology route is applied in the light machine field. Take the WP4.1 engine as an example, four-valve, high-pressure common rail, supercharged intercooler (arrangement) type and other configurations. Complete sample, also meets Euro 6 emission standards, and the independent ECU, high-efficiency SCR technology, DPF passive regeneration solution can also make fuel consumption lower, truly meet the national emission standards while reducing the burden on card friends.
Weichai WP4.1 engine
Generally speaking, in order to meet the national six emission standards, the engine should reduce the content of nitrogen oxides and PM particles in the combustion exhaust gas, and the precise control of the fuel injection amount by the engine ECU makes the combustion of the combustible mixed gas more fully reduce the generation of particles, and EGR The technique causes a portion of the gas to return to the combustion chamber for secondary combustion to further convert the nitrogen oxides into harmless gases. The specific solution difference is due to the difference between the matching model and the operating cost. The main direction of the light vehicle is to make the size and cost of the aftertreatment system as low as possible while meeting the emission regulations, and the heavy truck has a larger displacement, etc. Increasing fuel economy in DPF regeneration and improving the low temperature properties of SCR technology, as well as the use of new catalysts and reducing agents for cleaner and more economical combustion are the key development directions.
Does it feel that there are so many doorways in the country that seems to have changed little? Although it seems that the difference is not big, but the technical content of it is to test the technical reserves and research and development capabilities of enterprises. While the emission standards are constantly improving, it will inevitably promote scientific and technological progress, and defending the common blue sky is the goal of the development of the industry. Weichai insists on reform and innovation, and it can be said that it is always at the forefront of the blue sky defense war!
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