Although there is still a big gap between domestic 2.0T engines and many foreign 2.0T engines, the experience is still acceptable.
Chery's 2.0T engine
The engine data is very good.
Chery's latest model, 2.0T, code-named SQRF4J20, is an engine used on Starway VX, which has not yet been listed. The maximum horsepower is 254 horsepower and the maximum torque is 390Nm.
This data is already excellent in ordinary family cars, but many joint venture cars still can't match it. For example, EA888 on Magotan's high-power version has a maximum horsepower of 220 horsepower and a maximum torque of 350Nm.
Ford Mondeo's 2.0T engine has a maximum horsepower of 207 horsepower and a maximum torque of 354 Nm. Compared with Honda, the gap between this data and Honda is very small.
For example, K20C3 on UR-V has a maximum horsepower of 272 horsepower and a maximum torque of 370Nm. You see, the data are similar, but the prices are quite different, right?
Mainstream engines are used, plus black technology.
Good data is inseparable from the support of technology. This engine adopts 350bar high-pressure direct fuel injection, CVVL double scroll supercharging, electronic pressure relief valve, variable displacement oil pump, double balance shaft and cylinder head integrated reverse exhaust system.
The full name of CVVL is "continuously variable valve lift", which is similar to Honda's VTEC technology and is also helpful to improve horsepower and torque.
There is also a paper "Dynamic Simulation of Continuously Variable Valve Lift Mechanism" in Automobile Engine magazine.
CVVL can match the optimal valve lift according to the engine speed and load, thus improving the high-speed power and low-speed torque of the engine.
To put it bluntly, CVVL system can automatically adjust the valve lift, and it can explode when power is needed.
It's like: a person wears a ski suit when skiing, wears an evening dress when partying, and does corresponding things on corresponding occasions. Moreover, CVVL technology also has the effect of saving fuel.
Refer to the paper "Study on the Influence of Continuously Variable Valve Lift System on the Fuel Economy of Turbocharged Direct Injection Engine" in the Journal of Internal Combustion Engine Engineering.
The fuel consumption of supercharged direct injection engine can be reduced by 9% at 2000 rpm.
To sum up: good power and low fuel consumption, you can have both, but this car and engine are not on the market yet, and it depends on how it is used.
Geely's 2.0T engine
Next, let's talk about Geely. The code name of 2.0T engine is JLH-4G20TD, which is a series of engines with many different versions.
Geely xingrui uses ordinary JLH-4G20TD.
That is, the Drive-E 2.0T low-power engine above the lectra has a maximum horsepower 190 horsepower and a maximum torque of 300Nm.
Geely Interstellar uses JLH-4G20TDB with a maximum horsepower of 238 horsepower and a maximum torque of 350Nm.
In addition, JLH-4G20TDC is a Lectra 03+ and 05 engine with a maximum horsepower of 254 horsepower and a maximum torque of 350Nm.
Take JLH-4G20TD of Geely Xingrui as an example. In-cylinder direct injection, dual VVT, overhead injector, resin intake manifold, etc. All the mainstream technologies are used, and they are quite satisfactory.
The engine adjustment is also more inclined to the front output, that is, due to the use of low inertia turbine, the maximum torque of 300Nm can be output at 1400 rpm.
In other words, the low twist performance is still good. Moreover, this engine uses an electric coolant pump, which can also reduce energy consumption to some extent.
This paper is published in the journal Internal Combustion Engine and Accessories, and it is related to the Research of Electric Water Pump for Automobile. Compared with the traditional mechanical water pump, the electric water pump is not affected by the engine speed, and can work flexibly according to the actual cooling demand of the engine, reducing heat transfer loss and mechanical loss and fuel consumption. So in general, the data of this engine is average compared with the mainstream 2.0T engine.
More like a good student, he is ok in all subjects and has a good relationship with his classmates around him. No one particularly likes him, and no one particularly hates him. There is no digression, so it tastes like this.
Changan's 2.0T engine
Next, let's talk about Changan's 2.0T blue whale engine code JL486ZQ3. The code name of version 6 of the Bank of China was changed to JL486ZQ4, and 100% is under development. Applause!
74 patents were applied, including 24 invention patents. The engine data is ok, with a maximum horsepower of 233 horsepower and a maximum torque of 360Nm.
Compared with the two brands mentioned above, this engine is the so-called "old-timer".
However, technology is not backward. DVVT, in-cylinder direct injection, variable displacement oil pump, low inertia turbine, cylinder wall mesh design, high tumble combustion and other technologies are readily available.
Take DVVT technology as an example, it is called "intake and exhaust dual variable valve timing system".
There is a paper in Automobile Engine magazine, which mentioned the experimental study on the influence of DVVT on the performance of in-cylinder direct injection turbocharged engine.
According to the different working conditions of the engine, by adjusting the valve closing timing, the power performance and fuel economy of the engine can be improved, knocking can be suppressed, and the stability of idle running can be enhanced.
Just like a season with little precipitation, the reservoir opens to release water to alleviate the drought; In rainy season, the sluice is closed to store water in case of flood.
Great wall 2.0T engine
Finally, the Great Wall, a 2.0T engine code-named GW4C20B, won the "China Heart" Top Ten Engine Award in 20 19. The gold content is not as good as "Ward's Top Ten Engines", but it is still possible to refer to it.
Haval H6, H9 and other models all use this engine, with a maximum horsepower of 224 horsepower and a maximum torque of 385 Nm.
Technically, the mainstream things are similar, such as in-cylinder direct injection, dual VVT, variable displacement oil pump and so on.
In particular, this engine adopts a sodium-filled exhaust valve, which can effectively control the exhaust temperature.
There is a paper in the journal of Mechanical Research and Application, which mentioned the thermal performance analysis of hollow sodium-filled valve.
Sodium-filled exhaust valve can effectively prevent heat accumulation and sudden temperature rise of exhaust valve disk. Compared with solid valves, the highest temperature can be reduced by 1 13.78℃ under the same working conditions.
If the exhaust temperature is too high, the cylinder pressure will increase, which will lead to the decrease of intake efficiency and engine power. This situation can be effectively avoided by using this technology.
Most domestic 2.0T products don't have much black technology.
All in all, most domestic 2.0T engines don't have much black technology, and the data and technology are quite satisfactory.
Just like the dishes cooked in restaurants, they are neither delicious nor particularly delicious. The taste is passable every time, the price is more affordable than others, the quality is guaranteed and the competitiveness is getting higher and higher.