In this year's compact plug-in hybrid SUV segment, BYD Song Pro's biggest competitor will be launched in March. Prior to this, we conducted an in-depth test drive of the Chery Fengyun T6 that has not yet been listed, and first give a summary, this car has a good experience in terms of mechanical quality and use experience, whether it is the gearbox shift logic, or the power performance of the vehicle, the gearbox, engine and motor have played their respective advantages. And expect surprises at the price point.
Friends who are familiar with Chery products should know that this car is also built using the C-DM system, which is oriented to the plug-in hybrid market, and uses mature engine technology + electrification technology to achieve low fuel consumption performance. And its feed fuel consumption, reached 4The 9L 100km result is a good performance for an SUV model.
So what is the technical strength of such a product? Do you have any advantages in the same class?
This time, the Chery Fengyun T6 is still a product of the C-DM hybrid platform, using the 1. of the SQRH4J15In addition to the 5T turbocharged engine, it is not matched with a 1-speed DHT or a 3-speed DHT, but a 2-speed DHT gearbox that has been used on the Jietu Shanhai L9. This is a new change in the use of hardware.
Let's talk about Chery's engine technology first, Chery's engine R&D technology belongs to the first echelon in the domestic brand, so it has certain advantages in the field of plug-in hybrid. The power part of this C-DM platform, which happens to be Chery's specialty, has been iterated to the fifth-generation engine, and the thermal efficiency has been increased to 445%, which is more than the level of 43% of mainstream products on the market.
The fuel consumption performance of this engine was officially declared to be 42L 100km, but now on the SUV model, the fuel consumption of the feed has been achieved to 49L 100km, also acceptable.
Chery's 15T engine, technology used:
Deep Miller cycle, key technologies to improve engine thermal efficiency and optimize fuel consumption;
**i-HEC combustion system, improve combustion efficiency, in order to reduce energy loss;
350bar in-cylinder direct injection system, the mainstream high-pressure direct injection level in the industry;
It also includes HTC high-efficiency pressurization system, I-LS intelligent lubrication system, HIDS high dilution system and other major technologies.
The sole purpose of these technologies is to ensure that the thermal efficiency of the engine reaches 445% of this high level, and can have a good performance, 115kw maximum power and 220 Nm of maximum torque, and low energy consumption while achieving high performance, is the characteristics of this engine.
In order to take advantage of the characteristics of low energy consumption and high performance, a Miller cycle system is required, and in this case Chery, the Miller cycle achieves the fuel economy of the engine by closing the valve early, and can also be matched with any supercharger, including the turbocharger. Therefore, after the Miller cycle adds the turbocharger, and then adjusts the turbine pressure to match the proportion of the gas mixture, so as to save fuel + high power.
Judging from the use of this technology, the adjustment of the intake valve matching technology of this engine should be very large. And this 1The 5T engine is currently the best and most mature technology that Chery can come up with5T plug-in hybrid engine.
Different from the past, this time Chery Fengyun T6 uses a set of 2-speed DHT gearbox, and now the C-DM platform has included three gearboxes, but why does this car use a 2-speed DHT gearbox?
This set of 2-speed DHT hybrid gearbox uses a dual motor structure of P2 motor + P3 motor, and the P2 motor is just an ISG motor, which is integrated at the crankshaft end of the engine, with a maximum output of 92kW and a maximum torque of 150 Nm; The P3 motor is the power motor, which is directly connected to the final reducer, with a maximum speed of 12000rpm and a gear ratio of 3941, maximum power 105kw, maximum torque 240 Nm.
Among them, the P2 motor can act as a generator or a power motor, for example, when high power output is required, the P2 motor can drive the generator crankshaft to rotate together to increase the output torque, which means that the two motors + engine form three power sources, which can output power at the same time. If this set of 2-speed DHT is installed on the Jietu Shanhai L9, the total torque output of the two motors can reach the maximum power of 199kW and the maximum torque of 395Nm, which is only the power output of the pure electric drive part.
The above data is the data of the Jietu Shanhai L9, and the structure will definitely not be adjusted significantly if the 2-speed DHT transmission is used on the Fengyun T6, but because it is positioned as a compact SUV, there may be a possibility of downward adjustment in the performance data.
What kind of performance does it look like?
With the addition of a 2-speed DHT shift on the engine side, lower revs and more economical fuel consumption can be achieved in the mid-to-high speed range by decelerating and increasing torque. Then, with the addition of two motors, the maximum power of the whole system reached 314kW, but the maximum power of the system of Fengyun T6 should most likely not reach the level of 300kW.
So, why use this set of 2-speed DHTs?
One of the main reasons is the high level of motivation. The output capacity of Chery's 3-speed DHT transmission with motor assembly is only about 165kW, and the output power of this 2-speed DHT gearbox with motor has reached a maximum of 199kW, which is 54kW higher than the current BYD DM-i's 145kW. The reason is simple, this set of 2-speed DHT is a combination of dual motor drive, and 1The 5T engine assists it in a mid-size SUV, and if it is used in a smaller SUV like the Fengyun T6, the performance will be better if the motor performance is not reduced.
The second reason, of course, is the pursuit of better energy performance. The high power output of the dual motors can basically cover most of the working conditions in the low-speed range, which reduces the use scenarios of the engine to intervene in direct drive, so that the fuel consumption of the Fengyun T6 can reach 4The performance of about 9L is 15L engine Song Pro 5The fuel consumption performance of 3L is lower (04l/100km）。
Then the last question, why does Chery still use 2 gears when it has 3 DHT gears?
First of all, the positioning of the 3-speed DHT in Chery's product system is for high-end cars, and it needs to do much more than the 2-speed DHT. For example, it is necessary to achieve good power performance in the low-speed, medium-speed and high-speed range; It is also necessary to ensure the smoothness of the power output in each speed range, and one more gear will also greatly improve the smoothness; The second is that under the complex structure, there is limited room for cost reduction.
In contrast, the appearance of 2nd gear is much better, compared with 3rd gear, it is more purely for the performance of energy consumption and power to the extreme; Regarding the smoothness, there is not much difference in texture when driving.
Overall, this typhoon cloud T6, is a product that can take into account both performance and fuel consumption, although the performance will not be adjusted to the extreme, but in terms of SUV models of the same level, there is no problem with the first echelon, and then its fuel consumption is because of the addition of dual motors, so that the low-speed domain and the medium and high-speed range can be covered.