Yuchai engine "downsizing" note

"Downsizing" is the pursuit of many female beauty, this is It is evident to anyone. But did you ever listen to a cold engine and it's trying to "thin"? Surely a lot of people do not understand this, perhaps not heard at all.

Is the engine also beautiful? This is beyond doubt, the engine of the appearance, shape, structure will consider the stringent requirements of customers for beautiful. But here to say engine "downsizing" and the pursuit of beauty is not the same, after all, not the engine by the beautiful appearance to attract users, eyeball economy in engine industry doesn't work.

"I am thin and I am proud, I save the fabric for our country.." This is the thin people of a joke, but the transmission of a very important reason, raw material saving, cost. For Yuchai, engine "downsizing" can effectively reduce the consumption of raw materials, reduces the production cost of the enterprise; to loyal user of Yuchai products for engine "downsizing" vehicle fuel consumption will be reduced, the operating costs will reduce, earn money more. At the same time, the engine light weight or energy saving, an important means of environmental protection.

The reason is very good, but the engine "downsizing" means. According to the relevant experts, said the relative vehicle to fall back, the engine lighter weight requirements higher, more difficult to implement.

Yuchai Technicians Association, science and Technology Association President g. interview introduction, lightweight engine is a complex system engineering. It relates to talent, design, manufacture, process, materials in many aspects.

Moreover, the engine parts are numerous, in particular emissions upgrades, the engine has increased some of the necessary external accessories, each adding a component, are increasing the weight of the engine. Therefore, it can be said that the engine downsizing is Yuchai, Yuchai three core interests of suppliers and customers.

Make structure more excellent

From the structure of the engine "plastic" is a very difficult thing, because any changes are the whole body and the pull. Nevertheless, in order to achieve lightweight, enhance the competitiveness of the purpose of the product, the necessary structural optimization or the efforts of the R & D personnel to achieve.

Tan Dahui, vice president of Yuchai Engineering Research Institute said, starting from the structure optimization of YC6L cylinder cover typical weight loss. By optimizing the design, reducing the contact surface of cylinder cover, thereby reducing the machining area, and achieving the weight loss effect..

For each tiny change, we have to do the full CAE calculations, analysis, to ensure its performance stability." Tan Dahui stressed.

Learned from the Yuchai Engineering Research Institute where the relevant technical personnel, the lightweight engine is the continued pursuit of yuchai. This will remove the YC6L by Yuchai cylinder reinforcing plate to achieve weight reduction, the reduction effect of up to 23.4 kg. The safety and stability of the engine is the factor that the engine must consider.. "We are doing a durability test and vibration test for its bench.." The technician added to.

On the basis of ensuring the casting performance, the design of the structure of the casting is miniaturization, thin wall, hollow, etc., and the redundant part is also the effective way to realize the engine light weight..

To save costs, the foundry this year will cast a heavy focus on the job. The two workshop casting sand core weight loss effect, optimizing casting process method, D30 body weight than the original casting is reduced by 2 kilograms. Don't underestimate the two kilograms of hot metal, according to the factory's annual production outline, due to the weight loss of casting and the cost is considerable.

High strength thin body jacket high-end technology "is the latest achievement of Chen Jinyuan and his team made the manufacturing technology. Application of this new technology, make 2 mm ultra-thin sand core of water jacket in the manufacturing department, and cast body blank smooth inner wall, no sticky sand, no sintering, the level of technology catching up with Mercedes Benz and BMW.

G. this very confident, he said, the success of this technology, Yuchai high strength thin jacket manufacturing technology provides a new platform, more important is tempered by the pursuit of a high-end technology outstanding team.

Engine structure lightweight means and design of modular parts, accessories lightweight, for some parts of finite element analysis and the topology optimization and so on, Yuchai in this way the search will continue.

Application of new materials

New material application is an important way to lighten the weight of the engine.. At present, the application of high strength material and some application of some lightweight alloy material is the most outstanding..

Vermicular graphite cast iron is a kind of high strength material, its mechanical physical properties and casting process performance between gray cast iron and nodular cast iron, it is suitable for manufacturing high strength requirements and requirements under thermal cyclic load parts, such as cylinder block and cylinder head.

To reduce the weight of the individual parts but also reduce the effective way of the total weight of the engine, while the body as the engine of the core components, accounting for a quarter of the total weight, Yuchai engine "downsizing" of course start from it.

Chen Chin said: "from the beginning of January 2013, under the arrangement of Yuchai shares, deputy general manager Liang Qingyan manufacturing technology of Ministry of actively carry out the four models of the body lightweight process test, which we do d2500 body in drop weight is to use vermicular cast iron to replace the original gray cast iron to high strength and thin objective, each casting can reduce weight of 25 kg.

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