For car companies, the core technology of the engine determines how high the brand can reach, such as Porsche's opposed engine, Audi's Quattro four-wheel drive, Toyota's THS hybrid, and Honda's VTEC. ..It is these "hard goods" that support such amazing cars as the Porsche 911, Audi Q7, Corolla Twin Engine, and Honda Civic TYPE?R. In the domestic car market, Chery's third-generation ACTECO? 1.6T engine (F4J16) was once known as the strongest in its class. It is used in many models of the Tiggo series, Jietu, and Xingtu, and has both power reserve and economy. Widely recognized. But after all, this 1.6T engine suffers from displacement and cannot support the positioning of a high-end car.
Until Chery’s latest F4J20 2.0T turbocharged engine enters service, the data of 254 horsepower/390 Nm is close to the Honda K20 series (Crown Road, UR-V, Civic TYPE?R), which also means The Xingtu VX and the future Tiggo and Jietu series of high-end cars will also be more convincing.
The cylinder block is printed with the "F4J20" logo
Chery's 2.0T engine also belongs to the third-generation ACTECO series. We can also see this from the code name. It is SQRF4J20, and it only differs from the previous 1.6T engine (SQRF4J16) by the last two numbers representing the displacement.
As the latest series of engines developed, this engine also inherits the "excellent tradition" of 1.6T in tuning. It has a maximum power of 254 horsepower and a peak torque of 390 Nm, which is more powerful than the Volkswagen EA888 with the same displacement. (Tiguan L), Ford EcoBoost (Edge), Toyota 8AR-FTS (Highlander) are all more powerful. Even compared to the Honda K20C? 2.0T (Crown Road) engine, which has a red-head engine pedigree, its peak torque has certain advantages.
350Bar direct injection
In the technical application part, the latest 2.0T engine increases the injection pressure of the direct injection system from 200Bar (1.6T) to 350Bar, a higher injection pressure It is believed that better fuel atomization effect will help improve fuel economy and reduce cylinder wet wall or carbon deposits. Of course, after the National VI emission standards are fully implemented, 350bar direct injection from Bosch or Schaeffler has become more common, but there are only a few who are still using 200bar direct injection systems.
Other aspects include mainstream new technologies and technologies such as CVVT, twin-scroll supercharging, electronically controlled relief valves, variable displacement oil pumps, dual balance shafts, and cylinder head integrated exhaust (reverse layout). New design ideas are also reflected in this engine. Referring to the previous 1.6T model, its thermal efficiency exceeds 37%, which is relatively outstanding data for an engine that focuses on high performance.
Exhaust side valve lift control
It is worth mentioning that this engine also adds a CVVL valve lift control system based on the 1.6T engine, which can achieve medium and high speeds. The high-lift mode can be activated to provide a faster and more violent burst of torque, which can also be seen from the peak torque of 390Nm. It is reported that this valve control system imitates the working principle of Honda's VTEC valve control system. In specific cases, the cylinder head must be disassembled to "real hammer".
Chery's current 1.6T engine is matched with the 7DCT300 transmission from Getrag, which can no longer withstand the "violent output" of 390 Nm. It is reported that Chery will develop a new 7-speed dual-clutch transmission (7DCT380) and hand it over to SAIC Liuzhou Automobile Transmission Co., Ltd. for OEM production. It will not only bear greater torque, but also be compatible with the four-wheel drive system of the transverse platform.
The transmission may be "manufactured" by Liuzhou SAIC
Judging from the previous bidding announcement, SAIC Liuzhou Transmission Company has already transformed the production line for Chery's transmission, so it has not It is not just a parts supplier. The property rights most likely belong to Chery, not SAIC.
Judging from the serial number, the maximum torque that this transmission can withstand seems to be 380 Nm, while the maximum power of Chery's 2.0T engine is 390 Nm. We guess that the mass-produced model may have a maximum torque of 380 Nm. It will be appropriately relaxed. Of course, it may also be controlled by the ECU to limit the engine's torque output when the transmission is in low gear.
Actually, the code name of 7DCT380 does not mean that this transmission can only withstand a peak torque output of 380 Nm. The official maximum torque of the Volkswagen DQ380, DQ381, and DL382 we are familiar with all reaches 420 Nm.
Summary:
In the past ten years, with the continuous improvement of the domestic automobile industry system, major independent brands have also found their own path. As a SASAC auto company, Chery has been able to inherit the sense of crisis and development momentum of private enterprises. Its persistence and achievements in the field of forward research and development have also put many large state-owned enterprises to shame. With the 1.6T and 2.0T entering service one after another, and the Tiggo 8, Xingtu, and Jietu series continuing to be popular, Chery is vaguely looking to return to the "turbulent era" of the past.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.