Yuchai is optimistic about the future launch of new gas engines in the natural gas market

When the natural gas commercial vehicle market is “declining”, why does Yuchai “contrary” to the launch of new gas engines ?

This question may be a topic that many people are concerned about.

Optimistic about the future of the natural gas market can still be expected

Recently, the "Yuchai Machinery 2015 Young Machine New Energy Power Press Conference" was held at the Beijing National Convention Center. At the occasion of the 2015 China International Combustion Engine Show , Yuchai’s two new products for light gas engines were unveiled. In the same period, Yuchai also held the launching ceremony of “Yuchai Machinery's new energy power point in 2015, North China Green”.

When the natural gas commercial vehicle market is “declining”, why does Yuchai “contrary” to the launch of new gas engines?

However, natural gas models are no longer as beautiful as they were in the past due to the reduction in oil prices and rising gas prices. The launch of natural gas products at this time does not seem like a good time.

However, forward-thinking companies do not think so. Tan Guirong, vice president of Yuchai, said that first, from the perspective of passenger car development, natural gas as a supplement to energy, the future market is certainly there. Second, the current situation of natural gas cooling and the decline in diesel prices are relatively large. Once oil prices rebound, the promotion of natural gas will be relatively large. Thirdly, from the perspective of natural gas emission control, natural gas is better than diesel.

As for the development prospects of the gas engine market, Tan Xuefeng, deputy manager of the vehicle engine development department of Yuchai’s shares sales company, also believes that the market capacity of the gas engine itself is not too high. In the future, with the adjustment of gas prices and oil prices by the state for several years, two The difference between the two will be further widened, and the gas engine market is still promising.

“First of all, considering the environmental protection factor, the passenger car market may also need to prioritize natural gas engines. Second, due to the impact of national policies, small-displacement natural gas opportunities usher in a certain market, because the subsidies for hybrid electric vehicles require pure electric power. The mileage is longer and longer, then, when the vehicle is matched, its battery capacity will be more and more matched, and the power requirement for the engine output will be lower and lower. Therefore, as the battery is more equipped, The engine will be smaller and smaller, and there is a trend that next year's hybrid market may be keen on cars from 8 meters to 9.3 meters, so a small-displacement natural gas engine equipped with a gas-electric hybrid bus will also have a corresponding However, for trucks, the user is likely to look at the cost of use first, because the truck is solely for profit, if the cost of use of the gas engine is superior to that of the diesel engine, then the user must select the gas engine. Therefore, the development of the gas engine market depends on the difference between the gas price and the oil price, and see how the national policy is adjusted."

In addition, for the natural gas truck market, Tan Xuefeng is more optimistic about its application in the field of urban logistics and sanitation vehicles. “City logistics is paying more attention to emissions, so more gas engines will be used. There is also a market for sanitation vehicles that is worth looking forward to. Now many of Beijing’s sanitation vehicles start to use natural gas power. This is because municipal vehicles have to consider political factors. There will be requirements for environmental protection, and, nowadays, Sanitation vehicles are powered by chassis, one is top-loaded, and there are two engines in a car, once the gas engine is promoted, the market capacity is still very impressive, especially the small 3L engine. It is appropriate to do upper-loading power, and the power of top-loading power does not need to be too large. For example, the latest 4FAN engine released by Yuchai is very suitable and its applicability is even stronger.”

Pushing small displacement gas engines to fill industry gaps

Based on the optimistic judgment of the future gas engine market, Yuchai has recently released two natural gas engines, namely the 3L YC4FAN and the 4.7L YC4EGN .

"At present, in the engine area of ​​about 3L displacement, there is a lack of a natural gas product with stable overall performance and reliable quality. Therefore, after 3 years of research and development, Yuchai has developed the 4FAN 3L gas engine," explained Tan Xuefeng.

According to reports, the YC4FA series is a 3.0L light-duty diesel engine jointly developed by Yuchai and AVL Consulting. It is a 3.0L light-duty diesel engine newly developed in strict accordance with the German FEV company's machinery development program, and is the mainstream power for this displacement segment. “4FAN is a gas engine developed and designed on the basis of 4FA. The power covers 90 horsepower to 110 horsepower. The market is positioned at 6-7 meters of road buses, buses and buses, 4X2 light trucks, municipal sanitation and other special vehicles. Valve products, the maximum torque up to 300N.m."

Another newly released 4EGN product mainly covers three power segments, 140 horsepower, 160 horsepower and 170 horsepower. Tan Xuefeng said, “At present, the entire industry is missing a competitive product in the four-cylinder 160 hp range of 10 horsepower segments, which is also a blank area for the entire industry gas engine. Therefore, the launch of YC4EGN fills this gap.” It is understood that 4EGN was developed on the basis of Yuchai 4EG diesel engine, and its target is located in the special car market of 7.5-8.5 meters passenger cars, 4X2 medium-duty trucks, municipal sanitation and other special vehicles.

After the addition of the two new products, Yuchai Light Engine currently has corresponding products for each grade from 3L, 4.2L, 4.7L to 5.2L, 6.5L, and 7.8L. "A power section of 20 horsepower has covered 260 horsepower all the time. Now the model of Yuchai's light aircraft is very complete," said Tan Xuefeng.

Has many advantages Yuchai light gas engine wins in quality

What are the advantages of these two light natural gas engines after three years of research and development?

“At present, in the entire industry, the compression ratio of gas engines is generally 11:1, and the larger one is 11.5:1. To ensure that this 4FAN product is powerful and economical, it has a compression ratio of 12:1. This is the highest gas engine compression ratio in the industry so far. At the same time, we have optimized the cylinder head of our product and made a small vortex flow ratio to the cylinder head, which has greatly improved the engine's power and responsiveness." Tan Xuefeng said.

Another major breakthrough is that Yuchai's light natural gas engine has optimized the supercharger and made it a low-inertia turbocharger, which makes the low-speed dynamic and external characteristic torques approach the torque curve of the same-power diesel engine.

At the same time, based on the research and development of the diesel engine platform, these two engines have been optimized for the reliability of natural gas engines. "In terms of supercharger first, because of the high exhaust temperature of natural gas engines, we have water-cooled the supercharger, that is, our supercharger has a water-cooled intermediate. Second, the natural gas engine valve is dry friction. The valve and the temperature of the exhaust pipe are very high, so all of our valve and valve seats are made of imported materials to achieve high temperature resistance and corrosion resistance. In addition, in order to prevent surge or knocking of the supercharger, the boost pressure is increased. In terms of durability and reliability, we also added an anti-surge valve to the supercharger. This will allow us to use the low-inertia booster while ensuring the low-speed dynamics and economy of the engine, said Tan Xuefeng.

He told reporters that in addition to the above advantages, 4EGN products have increased in-cylinder braking in order to meet the demand for braking on 8 meters. This is a relatively new technology application in the industry.

Compared with competing products, Tan Xuefeng believes that Yuchai's natural gas engine is superior to quality. "YC4FAN engine, for example, the majority of the domestic natural gas engine is not enough to strengthen the body, run tens of thousands of kilometers began to change the machine, change the basic parts. Our advantage is that, first of all, the engine's body enhancement degree after so many years of vehicle applications , It is already mature.Second, our gas system has obvious advantages.In China, because small engines are cost-conscious, other manufacturers generally use domestic components when integrating their systems;the main gas we use now is zero. The components are imported, the nozzles are made of high-quality Japanese nozzles, the spark plugs are Bosch spark plugs, the ignition coils are Bosch ignition coils, and now the control system is independently developed by Yuchai, which is more suitable for domestic use environments. Several aspects have determined that it has a qualitative improvement compared to competing products."

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