Modular Design Achieves Outstanding Operational Economy of Scania Engines

Referring to SCANIA, many people in the industry may think of the world's top heavy trucks and the king of highways, but she is also an important engine manufacturer. At the bauma China 2016 exhibition in Shanghai, Scania focused on the theme of “Professionalism is strong only” and exhibited DC 9L (power range 202~294kW) and DC 13L (power range 257~405kW) based on the latest platform. ) And DC 16 liters (power range 405 ~ 566kW) industrial engine series products, fully meet the relevant emission regulations in Europe, the United States, China, Russia and India, as well as cleaner, more durable, more economical engine technology solutions.

Based on Scania's unique modular design concept and production system, Scania's industrial engines are manufactured using the same basic components. This simplifies inventory management, reduces maintenance difficulty and downtime, and enables “customization on demand”. The diversified configuration meets the diversified needs of different construction machinery customers in specific application scenarios; in addition, lower fuel consumption and operating costs, higher reliability and attendance, and up to 500 hours of engine maintenance cycle This gives Scania Industrial engines even more outstanding operating economy.

Tian Junqiang, Senior Sales Manager of Scania China Engine, explained to the reporter: “Modular design has several advantages: First, the versatility of parts is strong. All engine types are manufactured using the same basic components, the main difference is the number of cylinders. It can be 5 cylinders, 6 cylinders or 8 cylinders, and the second is more convenient inventory management, which greatly reduces the number of spare parts and facilitates inventory management, and the third is more maintainability.Because of the versatility of parts, it means more protection. And shorter maintenance time; Fourth, strong product continuity. While maintaining the versatility of parts and components, it can provide a variety of product configurations and will not change greatly due to product upgrades."

In addition, Scania has some unique designs that have greatly increased the value of its engines. “Dual oil filter system that can provide the best filtration effect and minimum fuel loss. It can effectively remove the carburizing ring of carbon deposits and other residues on the piston. The PDE electronic fuel injection system can change the fuel injection amount and injection time. Electronic control of all functions of the engine management system (EMS)." Tian Junqiang said.

Zhao Erli, Scania's Chinese engine application manager, added: “Every engine burn will produce some carbon deposit on the piston. If there is a lot of carbon deposition, it will damage the cylinder liner after a long time. The role of scraping carbon ring is As the carbon piston goes up, it will scrape off the carbon deposits around the piston, and the scraped carbon will be discharged along with the engine exhaust gas.Experiments have shown that the life of the Scania engine equipped with scraped carbon rings will be extended by 35. %."

For our country's engineering equipment, first, the working environment is rather harsh; second, the working time is relatively long; and third, there is no strict retirement system, so the engine life and maintenance convenience are particularly important. In the unique design of the Scania engine, crankshafts with overhaul value were highlighted. "The crankshaft journals are hardened to a depth of 3 to 5 mm, so they can be repaired after being worn by precision grinding. The hardening depth can be tolerated up to six grindings and has a superior service life." Zhao Erli stressed that "unique The single-engine maintenance design of the engine not only improves the convenience and efficiency of engine maintenance, but also reduces the number of maintenance engineers and reduces labor costs."

Scania DC13 engine

With the escalation of emission regulations, diesel engine manufacturers continue to adopt new technologies in order to meet increasingly stringent emission standards. For example, from three stages to four stages, some manufacturers have adopted a selective catalytic reducer (SCR) + diesel particulate trap (DPF) to effectively reduce nitrogen oxides (NOx) and particulate matter (PM). Scania uses an ultra-high pressure fuel injection system (XPI) + SCR technology, injection pressure up to 2400bar, do not use DPF. Zhao Erli said: "The biggest benefit of doing so is to reduce the space occupied by the engine for industrial equipment and reduce the maintenance costs in the later period. Moreover, from the second stage to the third stage and the fourth stage, the footprint of the Scania engine is also universal. Yes, the OEM does not need to change the design of the engine's space location due to the upgrade of the emission."

Scania's unique centrifugal oil filter design is also unique in reducing the cost of use. “The centrifugal oil roughing filter consists of a stator and a rotor. The rotor rotates around a vertical axis. A small hole in the rotor jets oil. The pressure of the oil pushes the rotor to rotate quickly. The oil also rotates along with it. Impurities According to the principle of centrifugal force, heavier impurities will be thrown on the inner wall of the rotor, and in the maintenance, only the sludge on the inner wall of the rotor needs to be scraped off, and no additional filter paper needs to be replaced. O-rings reduce maintenance costs," said Zhao Erli.

In the comparison between Tian Junqiang's strength and the competing engine maintenance costs, the reporter saw the same 13 litre diesel engine. Under the same conditions, Scania's maintenance cost is only about half of the competing products.

Regarding questions about the Scania service network that people are worried about, Tian Junqiang said: “Scania has 1,650 maintenance centers worldwide, spanning Eurasia, the Americas, Africa and Oceania. As of July 2016, there have been 13 owners in China. The distributors, 23 dealership sub-stations and service points are distributed in East, Central, and West, and the key areas have been covered by the service radius of 200 kilometers. In addition, the Scania service network also focuses on 'flight doctors'. 'Conservation training' and 'self-service philosophy'. As time goes by, the service will be more and more perfect."

Scania DC16 engine

Wang Jinxing, deputy secretary-general of the China Construction Machinery Industry Association, said: "The Chinese construction machinery industry is beginning to recover. Construction machinery manufacturers continue to improve product quality. Enterprises welcome high-quality, internationally renowned suppliers of construction machinery parts and components to enter the domestic market. Products, advanced concepts, and a global service support network provide support.”

With the continuous advancement of the “One Belt and One Road” initiative, China’s engineering construction and equipment are also accelerating to go abroad. Scania’s industrial engines with more than 100 years of history are bound to have much to offer.

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