The national five standards are more stringent, requiring a lower amount of nitrogen oxidation and particulate emissions, and the number of particle numbers is added, and the main manufacturers have also exhibited a big exhibition, or decreased. Engine power, either upgrade exhaust gas treatment.
The national six engine processing is roughly divided into two categories: ➤GR + DOC + DPF + SCR, this set is also a generally used process, more mainstream, widely used in China's major host plants. ➤ Small part of the manufacturer is in use, for efficient SCR + DOC + DPF, canceling the presence of EGR during the entire process, increasing the urea injection amount of the SCR portion, and can also achieve the effect of reducing nitrogen oxides. What does these EGR, DOC, DPF, and SCR do?
EGR-exhaust gas recirculation system | As the name refer to install an exhaust gas recirculation device on the engine exhaust pipe, control the exhaust throttle valve according to the directive of the ECU engine, divide the exhaust gas of the engine into two channels, all the way to enter the EGR back to the engine to participate again Burning, all the way into the turbocharger push the turbine. The main significance is to reduce the combustion temperature in the cylinder and reduce the nitrogen oxide content in the exhaust gas.
Because the national six regulations have strict control on the content of the exhaust gas nitrogen. After the EGR enters the secondary combustion of the engine, the tail gas is discharged from the exhaust gas, and the exhaust gas discharged from the single combustion is reduced by about 30% to 50%.
DOC-diesel oxide catalyst | DOC is the first step of after the exhaust gas treatment, and is a device that converts carbon monoxide, hydrocarbon in the oxidized exhaust gas, and converts NO2 and NO2. Excessive sulfur and phosphorus elements are produced in the exhaust gas, which can easily result in failure of the device.
What should be prevented from failing?
Use high quality low-sulfur phosphorus to lubricate oil, CK-4 full synthetic lubricant, advanced low gray dispensing side design, and low sulfur, low phosphorus, better protect the tail gas post-treatment device DOC, calibration should be demanding Summer six emission standards.
DPF-Diesel Particle Filter | DPF is placed behind the DOC, which can be captured before the particulate emissions enters the atmosphere, thereby reducing the particulate matter discharged from the exhaust gas. When the device captures the particulate matter, the captured particulate matter is also oxidized, and the DPF is regenerated.
However, when excessive ash is generated in the exhaust gas, it is easy to cause blockage, when active, passive regeneration process does not decompose, then replace the DPF filtering device.
How to avoid replacement of expensive DPF filtering devices?
To avoid DPF blocking, it is necessary to reduce the generation of ash, and the CK-4 full synthetic lubricants, advanced low gray, low-fluctophosphorus formulation design, better protect the tail gas post-treatment device DPF, and avoid clogging.
SCR-selective reduction catalytic technology | SCR is a treatment process for NOx in the exhaust gas emission of diesel vehicles, i.e., under the action of the catalyst, inserting the reductant agent ammonia or urea, reducing NOx in the exhaust gas into N2 and H2O.
The implementation of the national six standards is not only the challenge of host vendors, but also a challenge for car lubrication products. With the upgrade of engine technology, the requirements for lubricating oil are getting higher and higher.
The largest of the national six on the lubricant is the post-treatment discharge device DPF (diesel car particle trap) and GPF (gasoline car particle capture). The engine, the diesel oil can only be CJ-4, CK-4 and E6, E9 standard oil, and the turbine oil can only select the European standard C series of oil.
Editor: lq, reading full text, original title: What are the differences in Guixiu diesel engines?
Article Source: [Micro Signal: GH_C9C741F44FCF, WeChat public number: Auto Electric Circuit Bottle "] Welcome to add attention! Please indicate the source of the article.
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