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At present, advanced and highly efficient diesel and gas-powered technologies are relatively mature and form a certain industrial base. Under the demand for clean, environmentally friendly, economical and safe power, the diversified development trend of engine energy becomes more and more obvious, and a new round of technology upgrading competition for passenger car power is being staged. On May 23, at the 13th China International Transport Technology and Equipment Exhibition, Shi Lei, head of the forward-looking technology research and development department of Cummins (China), told reporters. 
Yuchai, Weichai, Cummins and other engine companies took their various power products to participate in the traffic technology equipment exhibition. Diesel, natural gas, hybrid and other engine products are in full bloom. Among them, Yuchai focused on promoting hybrid products for passenger cars of 8 to 10 meters. Cummins and Fiat brought new gas engines that meet European V/Euro VI emission standards. The project, Weichai and China National Heavy Duty Truck respectively demonstrated diesel and natural gas engines for passenger cars.
Diesel engine technology optimization
It is undeniable that diesel engines are still at the forefront of the current passenger car power market. The vast market space and demand prompted companies to continue their efforts in upgrading diesel technology.
China National Heavy Duty Truck demonstrated the adoption of Mantech's diesel engine using a variety of advanced technologies. According to Zhou Weijun, Marketing Manager of China National Heavy Duty Truck Group Hangzhou Engine Sales Co., Ltd., CNHTC carried out technical upgrades on diesel engines. For example, the fuselage uses a large number of aluminum alloys and the filter system is integrated to make the body lighter and smaller. , The key part of the fuselage uses vermicular cast iron to improve the fuselage strength and can extend the service life.
Weichai staff also told reporters that Weichai has improved the lubrication system of the engine, cylinder head, and crankshaft by optimizing the lubrication and cooling system, increasing the oil pressure, and expanding the speed range of the low fuel consumption area. Powerful, comfortable, and economical upgrades. In addition, the WP9H/WP10H series diesel engines demonstrated by Weichai were designed on the new H platform, and they can meet the Euro V emission standards at the start and are equipped with ECU independently developed by Weichai.
In addition, Cummins demonstrated its unique charm in the upgrade of diesel technology. The ISB 6.7 Euro VI engine uses Cummins's automatic start-stop technology. The software and hardware upgrades are more flexible and convenient to operate. The interaction with the vehicle's electrical system is stronger. It adapts to the operating characteristics of frequent urban bus starts and parking operations, resulting in lower CO2 emissions. The efficiency is higher and the maintenance cost is lower.
Gas engine upgrade opportunity to be <br> <br> spite of the market price of natural gas and electric double impact extrusion, natural gas engine market continued to show sluggish, but still its natural gas engine combustion advantage harmful emissions and less use of economic, commercial It is an important position in the upgrading of vehicle power. Engine companies still attach great importance to the improvement of natural gas engine technology.
At this exhibition, Fiat Power Technology (FPT) first launched a new natural gas engine, the Cursor9, to further expand its natural gas product line. According to reports, the maximum power of the Cursor9 natural gas engine is comparable to the 9L diesel engine. At the same time, the Cursor9 natural gas engine adopts a three-way catalytic technology and can meet the stringent Euro VI emission standards without using SCR (Selective Reducing Catalytic Technology) and EGR (Exhaust Gas Recirculation System).
Relevant person in charge of FPT told the reporter that environmental protection pressure and national energy conservation and emission reduction policies have a certain role in promoting the development of natural gas engines. Natural gas prices are also one of the important factors affecting the gas engine market. “In the future, with the increase in diesel prices, natural gas engines will Usher in a better development," he said.
In the face of the market potential of natural gas engines, Cummins has also launched a unique upgraded version of ISLGNearZero, which uses equivalent combustion combined with EGR and three-way catalysts to reduce nitrogen oxide (NOx) emissions by 90% to meet Euro VI requirements. standard. Quasi-zero-emission natural gas engines have advantages over pure electric products in terms of design and manufacturing costs. The use cost of "ISLGNearZero's zero-reduction emissions' natural gas power is equivalent to only half the cost of an equivalent electric vehicle," said Shi Lei.
New energy and hybrid power can be considered as "In the future, the use of hybrid power for passenger cars is becoming more and more obvious." Fan Chaoqun, deputy general manager of Yuchai's stock sales company, told reporters that under the Euro VI emission requirements, hybrid power is more comprehensive. A good solution is that "compared with diesel engines, the R&D costs and the use costs of hybrids have declined."
Fan Chaoqun revealed that one of Yuchai's customers has clearly stated that he wants to install plug-in hybrid products. Yuchai has already laid out new energy and hybrid products. The YC4EG170N-50 hybrid engine is a lightweight engine jointly developed by Yuchai and Ricardo in the UK. It is suitable for hybrid buses of 8 to 9 meters.
“This year the 8-10m hybrid bus market started to receive state subsidies. We believe that hybrid power will have a lot of market space and growth potential in the next few years. 4EGN is one of our flagship products in this market segment and is currently Xiamen Jinlong, Zhengzhou Yutong and other mainstream manufacturers have achieved volume support, and this year is expected to sell 1,000 to 2,000 units," Fan Chaoqun said.
In addition, CNHTC staff also stated that from a national strategic point of view, new energy buses will become the mainstay of the future market, and CNHTC is also seeking breakthroughs. At present, it also puts passenger-specific hybrid engines into the market, such as supporting Shenyang’s buses. 300 hybrid engines.