“Guo Si”The emission standards will be fully implemented on December 1.
Avoid these perceptionsMisunderstandingWalk into the world of the fourth national agricultural machinery together

Cognitive Misunderstanding of the Fourth National Agricultural Machinery

Urea tank is not installed（SCRSystem）Agricultural machinery

Don't belong“Guo Si”Model❌

There are two main paths for the fourth national emission standard.。

The first kindIs to let the fuel in the engine burn at a higher temperature and then use selective catalytic reduction.（SCR）Technology，Nitrogen oxides produced by high temperature combustion in tail gas are treated by urea solution.；

The second kindYes, throughEGR（Exhaust gas recirculation）The technology combines carbon and hydrogen in the tail gas and the tail gas,（CH）、Carbon monoxide（CO）、Carbon particles and other incomplete combustion products are introduced into the engine intake duct for secondary combustion.，Reuse particulate trap（DPF）Or an oxidation catalyst（DOC），Secondary treatment of a small fraction of the particulates produced by combustion。

Conclusion：UseEGRThe fourth national model of technology does not need to be equipped with urea tank.（SCRSystem）。

The second cognitive misunderstanding of the fourth national agricultural machinery
Dilute the urea solution with waterAnd that use cost of the vehicle can be reduce.❌

Concentration less than 32% after dilution with water.5%However, the urea solution can not reduce the exhaust gas.，Make nitrogen oxides(NOx)Emissions are still too high。Use by adding water for a long time，Will lead toSCRThe system does not work properly for a long time.，OBDThe system directly reduces engine output and increases fuel consumption，At the same time, it will be damaged.SCRComponents of the system。

Conclusion：The practice of choosing diluted solution reduces the cost of equipment in the short term.，In fact, the loss outweighs the gain。

The third cognitive misunderstanding of the fourth national agricultural machinery

Adding Urea to Agricultural Machinery Will Increase Driving Costs❌

The addition of urea will increase fuel consumption and thus increase the running cost of agricultural machinery, which is a misunderstanding in most people's minds.。Urea is used in the fourth national agricultural machinerySCRSystem，SCRThe system passedOBDSystematicECUContact with the engine，IfSCRThe system is not working properly，OBDThe system reduces the power output of the engine，And increase fuel consumption。But ifSCRThe system is working properly，The fourth engine with high pressure common rail technology burns more fully.，More stable output power of equipment，After engine optimization，5% reduction in diesel fuel consumption%Left and right，After the addition of urea，Fuel consumption will be further reduced。

Conclusion：Therefore, urea will not increase or reduce the fuel consumption of the engine.，Special urea can guaranteeSCRThe system is working properly，Assist in reducing fuel consumption。

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