Some people may think that this is the choice that users of low-end models will face. Actually, it is not. Today's Tri-cylinder is not what Li Xia and Otto were 30 years ago. Take the luxury brand BMW as an example, it not only introduced the three-cylinder model in the entry product 1 series, but also introduced the three-cylinder BMW 3 18i as early as 20 17. Why do so many people say that the three-cylinder machine is not good, and major manufacturers and even luxury brands continue to list three-cylinder products one after another? ?
In fact, the popularity of three-cylinder engines is an inevitable product of the times. Now, the whole world is advocating energy conservation and emission reduction. At a time when pure electricity and even hydrogen energy can't fully popularize and replace fuel vehicles, the three-cylinder engine is indeed the best energy-saving and emission-reduction scheme. Foreign three-cylinder engines developed earlier and were highly accepted by people. "Three-cylinder engine" has not only won awards frequently in the international annual engine selection, but also has a market share of over 65,438+05% in Europe. Some authoritative organizations even predict that by 2027, 1.0- 1.5L displacement three-cylinder engine models of GM, Ford, Toyota and other brands will account for more than 75%. ?
As for China, the three-cylinder engine is always criticized for its small displacement and large jitter. Why are China people so impressed by this? In fact, this is related to some black history of the three-cylinder machine. Looking back on the development history of three-cylinder engine, Suzuki fronte, the first mass-produced three-cylinder model, was born in 1979, which is famous for its small displacement and low power consumption. In China, the development history of the three-cylinder engine originated from the national car Li Xia. At that time, "Little Li Xia cars swept all over China" was a household name. In addition to its strong and durable impression, it is more of a deep memory of its shaking. If you don't understand the jitter of a three-cylinder engine, suddenly someone tells you, think about the earliest Li Xia car in those days, it was a three-cylinder one, right?
Then according to this logic, the core point that the domestic three-cylinder machine does not accept is jitter, so if this problem is solved, will the three-cylinder machine be perfect? First of all, it is a fact that jitter is not the patent of a three-cylinder engine. Traditionally, it is believed that the jitter of three-cylinder engine is a structural problem of the engine and a natural defect. In fact, the four-cylinder engine also has this problem, but the jitter is directly proportional to the displacement and speed. Therefore, 1.8L, four-cylinder models above 2.0L are basically equipped with two balance shafts to suppress jitter. As for many four-cylinder models of 1.5L, similarly, the jitter suppression technology of three-cylinder machines is becoming more and more mature. Of course, this requires more R&D costs, not just cylinder reduction. The research and development cost of three-cylinder machine is about 20% higher than that of four-cylinder machine.
Three-cylinder engine models have returned to China, and China's own brands have also done well, which is a representative performance. Geely Automobile's application in three-cylinder technology is in line with international standards, and there is no lack of its own innovation. Take Geely ICON as an example. Firstly, it is the direct hardware to suppress jitter, which consists of 12 key components, with double flywheels and balance shafts as the core. Through the cooperation of two symmetrical flywheels and the balance shaft, the basic function of suppressing jitter is realized.
Secondly, the adoption of 48V further magnifies the advantages of the three-cylinder engine. The original BSG motor with the same displacement, because the three-cylinder motor has a longer stroke and a larger cylinder diameter, plus 48V, so the low torque is better than the four-cylinder motor? With the support of BSG motor, it directly transits to the range of 800 rpm to avoid the 200 rpm jitter when the three-cylinder and four-cylinder are started. No matter the starting reaction speed or acceleration, it is better than the traditional four-cylinder machine matching 48V motor Geely ICON. Maximum power 140Kw and maximum torque of 300 Nm are the best examples. At the same time, the three-cylinder machine is smaller and lighter than the four-cylinder machine, and it is obviously helpful to save fuel by losing one cylinder. BSG cars can also bring 15% fuel saving rate, which can be said to be relatively economical.
Therefore, the current three-cylinder engine can completely solve the problem of jitter, and at the same time, it has good performance and fuel economy. Is there any reason why we don't choose a three-cylinder engine? Don't underestimate the three-cylinder engine. This is the core display of a car company's technology on the engine. Higher research and development costs bring more advanced technology. As for the three-cylinder engine that some people worry about, "a new car will definitely shake if it doesn't shake for three years, and it will shake for five years if it doesn't shake for three years." In fact, if you know a little about the engine principle, because the new three-cylinder engine balances the jitter through new technologies such as balance shaft, dual-mass flywheel and silent belt, and the design life of these accessories is the same as that of the engine, as long as these parts are not out of order, the three-cylinder engine will naturally have the same normal NVH level as the four-cylinder, and there will be no jitter problem in three to five years.
Therefore, we should treat the three-cylinder engine correctly. There are three-cylinder engines that are well done and four-cylinder engines that are not well done. After all, when the four-cylinder machine was just popularized, it was also dismissed by the six-cylinder party. Now F 1 is a four-cylinder machine, and the times are developing. We should keep up with the times.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.