BMW million luxury cars use this kind of engine, why on earth?

2020-08-03 03:54:16 0 Comment 1930 views
abstract

"Three-cylinder engine" has always been a sensitive topic in the automotive circle, so much so that many car manufacturers equipped with three-cylinde

"Three-cylinder engine" has always been a sensitive topic in the automotive circle, so much so that many car manufacturers equipped with three-cylinder engines will deliberately avoid this problem in their external publicity. But no matter how you "make good use of your strengths and avoid weaknesses", after opening the engine compartment cover, the compact three-cylinder engine will still make you "seeing is believing".

BMW million luxury cars use this kind of engine, why on earth?

Actually, many people don’t like three-cylinder engines. Most of it is because it is very general in NVH (Noise, Vibration, Harshness) control. Due to physical characteristics, the inherent jitter problem of three-cylinder engines can only be optimized by acquired technology.Decades ago, three-cylinder engines gave people the impression of being noisy, jittery, and low horsepower.

BMW million luxury cars use this kind of engine, why on earth?

Since everyone is so repulsive of three-cylinder engines, why now Many big factories are beginning to focus on the development of three-cylinder engines? Today, let's briefly sort out the problems about three-cylinder machines. It is recommended to forward and favorite~!

BMW million luxury cars use this kind of engine, why on earth?

BMW million luxury cars use this kind of engine, why on earth?

Before talking about the three-cylinder engine, let’s talk about who “started” first. Back in 1979, this is the first car Equipped with an in-line three-cylinder four-stroke engine. It is the Fronte from Japan's Suzuki. The first-generation Suzuki Alto at the same period also matched this three-cylinder engine with a displacement of 0.5L, with a maximum power of only 31 horsepower (23kW).

BMW million luxury cars use this kind of engine, why on earth?

BMW million luxury cars use this kind of engine, why on earth?

Forty years have passed, and now three-cylinder engines have sprung up in front of our consumers. The above table briefly summarizes the current mainstream three-cylinder engines in the domestic market. , They are basically equipped with a turbocharger on the small displacement three-cylinder engine to make it have a stronger power performance.

BMW million luxury cars use this kind of engine, why on earth?

BMW million luxury cars use this kind of engine, why on earth?

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Due to everyone's prejudice against three-cylinder engines, some models equipped with three-cylinder engines have more or less been resisted by the market, and the sales results are naturally not optimistic. Even the 1.2T three-cylinder engine of PSA Group, which won the title of the world's top ten engines, also dragged down the sales of popular compact cars such as Peugeot 308. And like Buick Hideo, which has always been able to break the wrist with the Volkswagen Lavida before, its sales have dropped severely because of the replacement of the three-cylinder engine.

BMW million luxury cars use this kind of engine, why on earth?

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Some people say that the sales of three-cylinder engine models are "shaked off".The technology does not seem to be fully established. Nowadays, major manufacturers use technical components such as balance weights, balance shafts, rubber damping gears, ductile iron curves, and pendulum-type dual-mass flywheels to solve the problem of engine vibration. At the same time, the sound insulation cotton is thickened, and the joint between the engine and the body is also equipped with a foot pad for better vibration reduction. Through a series of acquired technical optimizations, it is difficult for ordinary consumers to notice the difference between it and the four-cylinder engine in the car.

BMW million luxury cars use this kind of engine, why on earth?

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Because the 4-cylinder is cheaper than the 6-cylinder, and the 6-cylinder is cheaper than the 8-cylinder and 12-cylinder, many people think that the three-cylinder engine isIn order to have one less cylinder, the cost will be cheaper than a four-cylinder engine. In fact, the material cost of a three-cylinder engine is indeed slightly cheaper than that of a four-cylinder engine. However, in order to solve the problems of power, jitter, etc., a large cost will be invested in the R&D and production process. The actual cost is not necessarily higher. The four-cylinder machine is much less.

BMW million luxury cars use this kind of engine, why on earth?

Fuel saving is the original intention of car companies to develop three-cylinder engines First, as the emission law becomes more stringent, the engine displacement also tends to decrease. In addition to a series of technologies such as mixed injection, Atkinson cycle, and weak mixing system, more obvious energy saving and emission reduction effects can be obtained by reducing cylinders.

BMW million luxury cars use this kind of engine, why on earth?

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Although many countries The time limit for the ban on the sale of traditional fuel vehicles has been given. The electrification of vehicles is the general trend. However, due to some technical bottlenecks of pure electric vehicles, traditional fuel vehicles will not be eliminated all at once. However, the future internal combustion engine will be in the entire power system. The status and function of the electric energy will inevitably be gradually weakened. Electric energy will intervene in the form of hybrid and gradually increase its proportion, or directly cut off the direct drive of the internal combustion engine, and provide power for the vehicle in an extended range. Therefore, the traditional internal combustion engine will increasingly The less you need multiple cylinders, large displacement, high power, and large torque, the more you need it.

BMW million luxury cars use this kind of engine, why on earth?

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For mixed For motor vehicles, batteries and motors tend to have heavier weight. In the pursuit of lightweight, the weight advantage of three-cylinder engines with one less cylinder has emerged. Moreover, the three-cylinder engine with a more compact structure The cylinder machine can leave a lot of space for the layout of electrical equipment, which is also a good thing for family cars that pursue space.

BMW million luxury cars use this kind of engine, why on earth?

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From the universal curve of the engine, it is not difficult to see that the engine can reach its best working condition at high speed, and the energy conversion efficiency will be higher than that of the electrical system, and at the start , Under low-speed acceleration, idling and other conditions, fuel consumption and power characteristics are generally lower than electrical systems. The reason why hybrid cars are fuel efficient is exactly the same. The performance of the three-cylinder engine is definitely not as good as the four-cylinder engine when starting jitter or rapid acceleration, but the intervention of electric drive can make up for this disadvantage, and the power output of the three-cylinder engine can also achieve the best work during high-speed cruising. status. The perfect combination of the two brings a good driving experience, while also meeting the regulatory requirements for energy saving and consumption reduction.

BMW million luxury cars use this kind of engine, why on earth?

In this way, the three-cylinder engine has the feeling of being invincible in the world, but it is actually only suitable for compact cars or SUVs. Small cars are often used as urban transportation tools, and pure electrification will quickly become popular in small cars; and in fields such as medium and large cars, the power output of small displacement three-cylinder engines will definitely have problems with small horse-drawn vehicles.

BMW million luxury cars use this kind of engine, why on earth?

Although compact cars are only a market segment, From the perspective of sales rankings, compact family cars and compact SUVs are the most popular family cars among Chinese people. This also makes the three-cylinder engine have a lot of room for survival in the market, especially when there is no fundamental breakthrough in battery or fuel cell technology, and the two-cylinder or single-cylinder engine cannot meet the power requirements.Next, three-cylinder engine or three-cylinder engine + hybrid power form will gradually become the mainstream in the market. This is one of the important reasons why many manufacturers study three-cylinder engines.

BMW million luxury cars use this kind of engine, why on earth?

From the perspective of market strategy, manufacturers have developed three The motivation of the cylinder engine is not just related to the immediate cost and emission standards, but to meet the needs of the gradual electrification of future cars. It is very important for an automobile manufacturer to be prepared for danger in times of peace. Even in today's fast replacement of cars, it takes several years to develop a mature and reliable power system, and the three major components of the car such as power and chassis It is often an important part of whether a car company can establish technical barriers.

BMW million luxury cars use this kind of engine, why on earth?

From the perspective of our consumers, many people may not care about a car at all How many cylinders are there, as long as you can walk on the accelerator, the driving experience is excellent. The main reason for the serious decline in sales of three-cylinder models is that the previous impressions of "jitter" and "cheap" of three-cylinder models are deeply ingrained in people's minds. In fact, automakers only need to use better technical means to perfectly solve the NVH problem of the three-cylinder engine. After a good reputation, consumers will naturally pay for it.

BMW million luxury cars use this kind of engine, why on earth?

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