Isuzu State IV heavy-duty engine is still where EGR

At the 16th Shanghai International Auto Show , commercial vehicle halls had a total of nine truck booths, of which six were exhibiting engines, enough to see the status of engines in commercial vehicle companies, and Isuzu at the Qingling Auto Show . The 6UZ1-TCG40 heavy-duty engine is the only state-four heavy-duty engine that uses EGR technology. It is not known that the partners have found it. Then the question arises. Why the four-heavy engine in the Zhongguo is SCR, and only the Isuzu alone EGR? ?

Isuzu 6UZ1-TCG40 Heavy Duty Engine

According to the China Truck Network reporter, the Isuzu 6UZ1-TCG40 heavy-duty engine has a displacement of 9.5 liters, a maximum horsepower of 370 horsepower, and a maximum torque of 1422 N·m. Its background can be summarized by three “unique” factors. The first one is Isuzu "the only" a heavy-duty engine for the domestic market was launched in the domestic market in 2014. The second one is the engine used by Qingling's "only" heavy-duty truck, and Qingling Union Isuzu entered the country. The third and most important point is that the heavy truck market is a milestone-like driving force. It is the only national heavy-duty engine that allows the use of EGR technology and represents the highest level of Isuzu’s heavy-duty engines in China.

The Isuzu 6UZ1-TCG40 engine, which uses EGR technology, is controlled by two EGR valves to control emissions. The unique two-stage EGR pipe can be used to cool the exhaust gas through a two-stage cooling exhaust gas recirculation device to further reduce nitrogen. Oxide emissions, but also to prevent particulate matter increase, in addition to Japan's Denso common rail fuel injection system, the maximum injection pressure up to 2000bar, can achieve a cycle of five fuel injection, atomization effect is good, fuel more fully, with The large combustion chamber ensures more fuel, combined with a high-performance variable-section turbocharger to ensure that fuel and harmful substances are fully burned at the same time, and at the same time, it can effectively improve low-speed torque to ensure that the vehicle has a strong full speed range. Power output.

Comprehensively, the Isuzu heavy-duty engine can meet State IV emissions only through EGR+DOC, slightly improve even up to the country's five emission standards, and the main emission index can even be reduced by more than 10% compared to domestic engines. Compared with SCR, the use cost is lower, the noise is smaller, the fuel consumption is more economical, and the most important thing is that there is no need to use urea, which will save the user a lot of money each year. In foreign countries, the “mann” diesel engine is through EGR+. PM-KAT filter to meet Euro IV and Euro 5 emission regulations. However, the current domestic heavy-duty engine market SCR technology has been widely recognized in the domestic national quadruple card market has occupied a dominant position, Isuzu State four heavy-duty engines in order to break this market structure, Xiao Bian that should also address the following issues.

First of all, the EGR technology used in the Isuzu engine has made large changes to the engine, which has made the overall structure of the engine more complicated, resulting in a relatively high failure rate. Once a problem arises, the maintenance cost will be greater. The SCR system is independent of the engine, and it is also relatively easy to maintain. The changes to the engine are relatively small, making it easier to use and replace.

Secondly, in order to improve transportation efficiency, domestic heavy-duty engines generally tend to be large-horse-powered for R&D. At present, the maximum power of domestic engines can reach 500 horsepower or more. However, the heavy-duty engine of Isuzu has a maximum power of less than 400 horsepower and cannot fully adapt to the domestic market. The different needs, so there are still some limitations in the choice of horsepower segment.

In addition, the Isuzu 6UZ1-TCG40 heavy-duty engine has just entered the country in 2014. Currently, it only matches the Qingling VC46 heavy-duty tractor, and the Qingling VC46 is just a new model produced to match this heavy-duty Isuzu engine, and Qingling in China. The heavy truck market has a low influence, and the SCR technology has already been deeply rooted in people's minds. With Qingling Auto's platform, it is more difficult to promote the Isuzu State IV EGR heavy-duty engine.

Obviously, in today's heavy truck market where SCR technology is popular, the Isuzu 6UZ1-TCG40 is unique, and it is necessary to wait and see if we can stick to EGR.

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