In the past few days, the Chery engine "virtual mark" incident has aroused the attention of many people. In a live horsepower test conducted by a certain self-media, the Xingtu Lanyue equipped with a Chery 2.0T direct injection engine ran out of the maximum horsepower of 253.83Ps, which was almost the same as the official 254Ps (187kW), and the maximum torque was 448.06Nm. It is far more than the official value of 390Nm.
The most sensational thing is that after connecting the external computer (equivalent to computer overclocking), because Lanyue exceeded the load-bearing torque set by the horsepower machine in a test, a "red screen" warning appeared.
This rare live broadcast accident instantly ignited the enthusiasm of the audience. Everyone said that Chery was a serious "virtual standard", but it was humble.
So, is this 2.0T engine really so strong?
horsepower machine test reliable?
The first question that needs to be answered is, is it reliable to measure engine power like this?
Horsepower machine, also called dynamometer, is not a new thing in the automotive industry. In recent years, it has entered the public view mainly because of the rise of live broadcast and short video-by testing the true power output level of the vehicle, let’s take a look at the manufacturer. Whether it is "kindness" or "virtual standard" is the biggest attraction of this type of program. It can be said that it is similar to the rise of "blind box".
However, entertainment belongs to entertainment. The power tested by the horsepower machine and the power of the car engine are actually two different things. Regarding the power of a car, there are three concepts that need to be clarified: rated power, net power, and on-wheel power.
The rated power refers to the power output by the crankshaft end point when the engine is running alone without any external accessories;
The net power refers to the engine connected to the generator, air conditioner, electric power assist system, particle trap and other accessories After that, the power output by the end of the crankshaft;
The power on the wheel, as the name implies, is the power that finally reaches the wheel end after the net power is transmitted through the gearbox, gear, etc.
In other words, the maximum rated power of the engine>the maximum net power>the maximum on-wheel power.
For product promotion needs, car manufacturers generally emphasize the rated power of the engine to attract consumers, but national regulations require that the maximum net power of the engine must be marked on the car nameplate. As for the wheel power, although it can better reflect the true power output level of the vehicle, it must be tested by professional equipment such as a horsepower machine.
When these concepts are clear, it is not difficult to understand that the actual on-wheel power cannot be equal to or even exceed the maximum net power of the engine.
Some viewers also questioned the test of the Moon Moon: why the horsepower of this Moon Moon machine is almost equal to the nominal maximum net power of the Chery 2.0T engine? Is there almost nothing in the transmission process of gears and gearboxes? Is it a loss?
This involves a professional compensation parameter-TCF during the horsepower machine test.
takes into account the loss in the conduction process, so when the horsepower machine is tested, you can set an estimated loss ratio, that is, the TCF value. For example, the TCF value of the horsepower machine for this moon test is set to 1.15. That is, 15% loss, and then the horsepower machine will automatically multiply the actual on-wheel power by 1.15 to reverse the actual net power of the engine.
The problem is that the true power loss value of different models is not necessarily 15%, it may be high or low, then theoretically it may appear. The net power of the reversed calculation is higher than the data provided by the manufacturer. In the past, it was from the media A similar situation occurred when testing BMW models.
However, despite such problems, if a unified standard can be achieved, such a test can still objectively reflect the actual power level differences between different models.
comparable to the BMW 2.0T high-power version
After clarifying the test standards of the horsepower machine, it is easier to draw conclusions about the actual power level of Lan Yue.
The maximum horsepower pulled down by Lanyue in the original factory state is 253.83Ps after the reverse push. Previously, this self-media machine used the same horsepower machine, also based on the 1.15 TCF value, to pull the 2.0T high-power version of the BMW 530Li. The maximum horsepower output is 255.66Ps,The two are basically at the same level. But in terms of torque, the 448.06Nm (speed 2651rpm) data drawn by the Lanyue 2.0T horsepower machine exceeds the 400.79Nm (speed 3710rpm) of the BMW 530Li by more than 10%.
Since the torque is actually calculated by the power value and the engine speed, when the power is almost the same, the torque of Lanyue can far exceed the BMW 530Li, the reason is that it can reach the maximum at a lower speed Torque, that is to say, the 2.0T engine can reach the peak torque faster.
It is no exaggeration to say that, as shown by the official parameters, this Chery 2.0T engine on Lanyue is matched with a 7-speed wet dual-clutch gearbox, and the final actual power level has surpassed the 2.0 carried by the BMW 530Li. T high-power engine + 8AT gearbox, and the price of the two has more than doubled.
Another point is that in the case of "overclocking", Lanyue broke out with a horsepower of 280.73Ps and a torque of 489.23Nm. In extreme cases, it exceeded the safety setting of the horsepower machine. Red screen”, but after recovery, the vehicle can still continue testing. It shows that not only this 2.0T engine is powerful, but the 7-speed wet dual-clutch gearbox also has great potential.
Regarding this result, some people questioned it, thinking that with such a strong power, the acceleration performance of 100 kilometers in less than 8 seconds to the moon was "low".
This question has also been answered when we communicated with StarTour engineers.
With the quality of this engine, Lanyue can be adjusted more radically, but considering the durability, reliability and comfort orientation of Lanyue as a large and medium-sized 7-seater SUV, the engineers finally decided on the power of the engine. After the "seal", the acceleration level that can run into 8 seconds is completely enough. In fact, with a curb weight of 1.7 tons, the 530Li acceleration level of 100 kilometers for the eccentric movement is 6.9 seconds, which is less than one second faster than the 1.9-ton moon.
In addition, according to the data from the authoritative third-party organization Cubs’s fuel consumption statistics,The actual fuel consumption level of Lanyue 2.0T also surpasses that of a number of joint venture models, and ranks among the best among large- and medium-fuel SUVs. Considering that Lanyue owners’ pick-up time is mostly close to the Spring Festival holiday, it may increase slightly in the later period, but overall Still a very good level.
So on the whole, Star Road Lanyue 2.0T can be described as "the strongest independent" in terms of power level and economy, and the actual performance has been able to surpass the 2.0T high-power version of luxury brands. , At the world-class level.
At the same time, according to live broadcast information, Lanyue 2.0T was tested with 92# mixed 95# gasoline during the horsepower engine test. Since Chery announced the net power value of the 2.0T engine is based on the results of the 92# gasoline test, if it is fully used No. 95 engine oil, adjusted slightly more radically, whether the power level will reach or exceed the top 2.0T engine with 265Ps horsepower (195kW) and 400Nm torque on the BMW X5 is also unknown, and the price of the latter is already a month. More than three times as much.
Currently, according to the latest information on the website of the Ministry of Industry and Information Technology, Xingtu has declared a new model of Lunar 400T. The maximum power and torque have been upgraded to 192kW and 400Nm respectively. It may be the legendary 2.0T high-power version. I believe it will be in the near future. After it was officially launched on the market, whether it will be equipped with an AT gearbox and the actual power level have become the focus of attention of netizens.
Summary
After this "virtual standard" incident, Chery Polytech's male image has become more and more strengthened. If you don’t speak, the blockbuster engine research and development capabilities have also helped Xingtu take the moon. Presence.
Chinese brands have built engines that surpass joint venture brands, which is a great thing for consumers and the Chinese auto industry. Tianyajun also hopes that such "virtual standards" will be more and more fierce in the automotive core technology field, so that Chinese brands can "break the defense" of joint venture brands as soon as possible and bear fruit in the global market.
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