A few days ago, Iveco and Fiat Powertrain made a technical demonstration in a technical forum in Turin in a cooperative manner, including a unique solution that they announced last year to meet Euro 6 emissions requirements, and they will reduce fuel consumption for future customers. Depletion and operational cost planning.

The Iveco and Fiat Powertrain industries have always been committed to technological innovations that reduce operating costs, of which fuel consumption is the basic point to achieve this goal. When the Euro IV/V emissions standards were introduced in 2005, Iveco and Fiat Powertrain Industries had already chosen the SCR (Selective Catalytic Reduction) technology route. This technique can adjust the engine, in order to fully optimize combustion efficiency, to reduce fuel consumption, and the resulting nitrogen oxides is more SCR exhaust after treatment system clean.

In view of the fact that the requirements of end-users for high-efficiency fuel engines have not changed, Iveco and Fiat Powertrain Industries have maintained the same technical route as Euro IV/V for Euro VI emissions regulations. Compared with the need to intervene in the combustion chamber and the exhaust system, Iveco can make the best use of the scientific and technological achievements made by the unremitting efforts of the Fiat Powertrain industry and further improve efficiency through SCR technology. The Fiat Powertrain industry has been fully patented for an efficient SCR system that can achieve unprecedented efficiency.

The post-processing technology of the Fiat Powertrain Industry, which uses a single SCR on Euro 6 cars, is unique because it can eliminate extreme exhaust gas recirculation and rely solely on catalytic reduction systems to meet extremely stringent nitrogen oxide emission limits.

Emissions: Overview

Due to the chemical reaction caused by combustion, diesel engines emit a series of pollutants, the most harmful of which are nitrogen oxides (NOx) and particulate matter (PM).

The Euro 6 emission regulations apply to all heavy-duty commercial vehicles and passenger cars that are on the market after January 1, 2014. The regulations require that the emission of hazardous pollutants from tailpipes must be significantly reduced: Compared with Euro 5, the amount of nitrogen oxides emissions must be reduced by 80 % (ETC test cycle, emissions equivalent); compared with Euro 5, particulate emissions need to be reduced by 66% (ETC test cycle, emissions equivalent). Plans to further introduce granule limits will lead to a reduction in total particulate emissions by more than 95%; and the introduction of ammonia emission limits.

In addition to this, the Euro VI emissions regulations have also updated a range of operational aspects: they apply to new test cycles in the transient and steady state globally. The transient cycle will repeat twice: once when the engine is cold and once after the engine has stopped for a while. Cylinder emissions are included without the use of a closed system. Emissions have been met for a period of up to 700,000 km or extended to 7 years for the largest model. Further enhance the performance of on-board diagnostic systems. Use portable measuring systems (PEMS) to check emissions during use and check and control emissions outside the cycle. Take measures to facilitate access to vehicle repair and maintenance information to ensure that independent operators can obtain this information.

Since the first use of the global unified engine certification test cycle, the introduction of the Euro VI legislation represents a milestone in the development of global emissions standards.

Efficient SCR system

To achieve Euro 6 emission limits, only by using the SCR system, this system can be used alone or in combination with EGR (Exhaust Gas Recirculation System).

The use of the EGR system reduces the emission of nitrogen oxides in the combustion chamber through the recirculation of exhaust gas, but correspondingly increases the emission of particulate matter and reduces the combustion efficiency. In addition, exhaust gas containing more particulate matter discharged by the engine must be reprocessed by a DPF (diesel particle filter).

However, Fiat Powertrain Industry has taken a different approach by increasing the efficiency of the engine by not using exhaust gas recirculation and reducing the particulate matter produced by combustion. The remaining particulates are burned through the passive diesel particulate filter, while the nitrogen oxides are reduced through the exhaust system while improving fuel consumption, performance, and reliability.

The high-efficiency SCR system of Fiat Powertrain Industry can reduce nitrogen oxide emissions by more than 95%.

Specifically, the system consists of the following components: Diesel Catalyst (DOC), Passive Diesel Particulate Filter (DPF), Additive Blue Dosing Module, Adder Blue Mixer, Selective Catalytic Reduction (SCR), Cleanup Catalyst (CUC)

Finally, a sensor integrated network is used to control the emissions of nitrogen oxides and excess ammonia.

The "single SCR" technology is a new comprehensive method introduced under the extensive research of the Fiat powertrain industry. These studies have brought a number of important patents: "closed" control: it can accurately control the amount of blue ration to Lower NOx emissions at the SCR catalyst inlet.

Self-adapting blue dispensing system: Due to the use of nitrogen oxide and ammonia sensors, the control system can provide accurate information on the composition of the exhaust gas. Insulation high turbulent mixing: Allows uniform hydrolysis of urea and proper distribution of exhaust gas flow. Improved thermal management: Accelerate the activation of the SCR system in the cooling section of the discharge cycle.

All components of the entire exhaust after-treatment system are contained within a compact, fully enclosed structure that does not interfere with retrofit work or installation of chassis equipment and minimizes weight.

Euro six engine

By continuously making technical improvements to the advanced engine range, the Euro 6 engine has introduced technology remanufactured products that allow Iveco vehicles to maintain their leading technological characteristics.

The key to optimizing combustion efficiency is to have high average cylinder pressure and high injector pressure. To achieve these goals, important changes have been made to the engine block and cylinder head design, including increased structural rigidity, increased coolant flow, and increased working volume.

The Euro 6 engine series uses the latest generation common rail injection system with a maximum injection pressure of up to 2200 bar.

Euro 6 engine introduced a new electronic control unit to manage engine parameters and precise control of the post-processing system. The new electronic control unit aims to optimize the compactness of the structure and fully integrate the functions of all engines, SCRs and DPFs. The Cursor engine uses a variable geometry turbocharger, which features an electronic control unit to optimize engine response at low speed loads and improve engine braking efficiency. In addition, all engines are equipped with an engine brake throttle to support passive regeneration of the DPF, and it can increase engine braking performance by 30% compared to the current Euro 5 engine.

In order to achieve the best environmental performance, the Euro 4/5 engine is equipped with a closed-circuit engine intake system, while the Euro 6 engine retains this configuration. In order to prevent the engine gas mist, a high-performance oil separation system was also introduced to minimize the possibility of fuel contamination of the DPF.

Due to the optimized combustion scheme, the amount of particulates emitted from the engine has been reduced, so there is no need to use DPF regeneration, which is very important for controlling fuel consumption and regular maintenance. In addition, since the engine only inhales clean filtered air and does not inhale any recirculated exhaust gas, the engine wear can be kept at a very low level and the oil change cycle can be increased to 150,000 kilometers. This also brings advantages in operating costs and reduces downtime due to scheduled maintenance.

Its advantages can be summarized as follows: Higher reliability; Higher output power without an advanced air management system; Increased maintenance cycles due to reduced engine wear (up to 150,000 km depending on the application ), Operating costs are reduced; engines and efficient post-processing systems are compact, well-designed, lighter, and require less space for installation.

Iveco

Iveco is a Fiat Industrial company that designs, manufactures and sells a full range of light, medium and heavy commercial vehicles as well as off-highway trucks, urban, intercity buses and coaches. Iveco also produces other special vehicles such as firefighting, off-road, military vehicles and police vehicles.

Iveco uses advanced technology and operates in 11 countries around the world, with nearly 25,000 employees. In addition to Europe, Iveco also operates in China, Russia, Australia and Latin America. With over 5,000 sales and service stations in more than 160 countries, Iveco's technical support is ensured anywhere in the world where Iveco vehicles work.

Fiat Powertrain Industry

Fiat Power Industries, a Fiat Industrial company, specializes in the design, production and sale of powertrains for road and off-highway vehicles, marine engines and power transmission systems for power stations. Fiat Power Industries has 9 factories and 5 R&D centers and employs about 8,000 employees. The company's sales network covers more than 100 dealers and more than 1,300 service outlets in 100 countries. With a broad product portfolio (5 series engines output from 37 to 640 kW and gearboxes with a maximum torque of 300 to 500 Nm) and a great emphasis on R&D, Fiat Power Industry has become the world leader in industrial powertrain production. Business.

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