Which is better, Great Wall Motors DVVT and CL technology?

The essence of the two technologies is the same, one is to let the opening and closing of the valve change with the engine speed, and the other is to continuously adjust the valve lift, both for sufficient air intake. It's just that the first one uses dual control technology, which will be better.

1. Basic introduction to VVT.

Principle. The principle of variable valve timing technology (VVT) is to adjust the amount of intake (exhaust), and the opening and closing time and angle of the valve according to the operation of the engine, so that the amount of air entering can reach the best and improve the combustion efficiency. The advantage is that it is fuel-efficient, and the power-to-rise ratio is large, while the disadvantage is that the torque in the middle section is insufficient.

VVT technology.

The VVT of Korean cars is based on Toyota's VVT-i and Honda's VTEC technology in Japan, but compared with Toyota's VVT-I variable timing valve technology, VVT is only variable valve technology and lacks timing technology, so the VVT engine is indeed more fuel-efficient than the general engine, but it is not as fuel-efficient as the Toyota and Honda cars of Japanese cars. BMW has already adopted this technology in previous generations of engines, such as Honda's VTEC, i-VTEC, and current engines; Toyota's VVT-i; Nissan's CVVT; Mitsubishi's Mivec; Suzuki's VVT; modern VVT; Kia's CVVT; JAC's VVT; The Great Wall's VVT and other products are also gradually being used. In general, it is actually a technology, with a different name.

2. CVVT:

This is Kia's name, which is the same as Toyota's VVT technology, but the name is different, and it is imitated from Toyota's VT technology.

3. DVVT (Intake and Exhaust Dual Continuously Variable Valve Timing System).

The DVVT engine is the continuation and development of the VVT, which solves the technical difficulties that the VVT engine failed to overcome. DVVT stands for Dual Variable Valve Timing, which can be said to be the most advanced form of valve variable timing system technology at present. The DVVT engine uses a similar principle to the VVT engine, using a relatively simple hydraulic cam system to achieve its functions.

The difference is that the VVT engine can only adjust the intake valves, while the DVVT engine can adjust the intake and exhaust valves at the same time, and has the excellent characteristics of low rpm and high torque, high rpm and high power, and is in a leading position in technology. In layman's terms, just like the human breath, being able to control "exhaling" and "inhaling" rhythmically as needed certainly has a higher performance than just being able to control "inhalation". It is based on this technological leadership that the specifications of the models equipped with the DVVT engine are the largest in their class.

In the past, DVVT engines were mostly used in mid-to-high-end models, such as LaCrosse's Ecotec engine, BMW 325 DVVT, Opel Astra, Crown and Ruizhi. In order to enhance the competitiveness of the product, some of the leading A-class cars have begun to apply DVVT technology, such as Roewe 550 and Chevrolet Cruz, and the upcoming 2011 Chery A3 is equipped with the second-generation engine of the Acteco series, model SQRE4G16, with a maximum power of 93kW and a maximum torque of 160Nm at 3900 rpm.

DVVTI, of course

Engines with DVVT technology are more efficient, energy-efficient and environmentally friendly than engines with intake valve timing technology that are currently used in the market.

Benefits of DVVT Technology for Automotive Engines:

1. Reduce fuel consumption: reduce fuel consumption by 5%, increase power by 10%, and reach the power index of displacement 2. Exhaust gas standard: exhaust gas emissions meet national standards;

3. It can fully improve the air-fuel ratio: the most suitable air-fuel ratio can be achieved by controlling the gasoline and air mixture in the combustion chamber of the engine;

4. Improve car idling: improve the stability of idling to obtain better comfort.

Safe and fuel-saving within 100,000 at present there is no rival The A3 2011 model that will be launched next month is DVVT (data from the Ministry of Industry and Information Technology, with CVT automatic, ESP, independent suspension.

China's No. 1 price-performance ratio.

In 2010, Chery became the first automobile company in China to fully master the four key technologies of chassis, engine, transmission and engine electronic management system (EMS).

Chery, you can check it on the Internet, the most important chassis of the car, engine, gearbox, safety, etc., the best domestic independent engine is Chery's, the export volume of passenger cars has ranked first in China for 10 consecutive years, BYD electronic technology is absolutely bull, so BYD's cars are more electronic control functions, Geely has been acquiring, Volvo's production line, Australia's gearbox.

BYD's technology is the most advanced, although the public has a suspicion of copycat for him, I think it is a bit similar in appearance, but the internal configuration and electronic technology are their own innovation, including gearbox to engine, and then to the driving computer, and it is also the only manufacturer of domestic independent research and development of automotive computers. However, judging from the development process of domestic cars, there is no domestic car that is not developed by reference. For example, take the current Chery high-end car G6 as an example, all his internal things are a copy of the Audi A4.

The Cowin is a remake of Fiat's model. Geely's early cars are also realized by testing the reproduction of mature models.

The so-called DVVT I don't think it's really fuel-efficient. Geely's car has a large fuel consumption for all to see.

In terms of these independent brands in China, there is no core product that can really have independent intellectual property rights, all products are reverse engineered, the so-called advanced is just a howl, remember one point, advanced is not necessarily reliable, only mature products can be accepted by consumers!

It is recommended that you buy the Great Wall, the Great Wall car has been really good in recent years, I Linyi, and now this car is out of stock.

CVVT is the abbreviation of English Continue Variable Valve Timing, translated into Chinese is continuous variable valve timing mechanism, which is one of the many variable valve timing technologies that have been gradually applied to modern cars in recent years. For example, BMW calls it Vanos, Toyota calls it VVTI, and Honda calls it VTEC, but whatever they are called, their aim is to match the best valve overlap angle (valve timing) for different engine conditions, but the method of achieving this is different.

VVT: is variable valve timing;

CVVT : Continuously variable valve timing;

DVVT: Dual Variable Valve Timing;

VVTI: Intelligent Variable Valve Timing System;

VTEC: Variable Valve Phase and Lift Control System;

VVT: Yes Variable Valve Timing, CVVT: Continuously Variable Valve Timing, DVVT: Dual Variable Valve Timing, DVVT OK.

The engine is the power source of the car. Automobile engines are mostly thermal power units, referred to as heat engines. The heat engine converts the heat energy generated by fuel combustion into mechanical energy with the help of the state change of the working fluid.

DVVT technology is the most competitive with high efficiency and low consumption.

The engine is the "heart" of the car, in today's emphasis on energy saving and environmental protection, our requirements for the automobile engine, simply put, are to use the least oil to achieve the maximum output of power and torque, and stable, continuous, reliable, and with low emission added value. The reason why the Roewe 550 has attracted wide attention after its launch is precisely because it adopts the most advanced DVVT intake and exhaust dual variable valve timing technology, which can increase power and reduce fuel consumption when needed.

cvvt

Continuously variable valve timing;

DVVT: Dual Variable Valve Timing DVVT; First of all, VVT refers to variable valve timing. We know that the opening and closing of the intake and row doors of the general engine rely on the mechanical timing transmission mechanism to open and close at the corresponding position of the crankshaft angle, which has nothing to do with the speed and load of the engine. In other words, no matter how high or low the speed, the opening and closing time of the door corresponds to the rotating position of the crankshaft, and the pursuit of perfection in engine technology now requires the best performance at any load state and speed.

So someone has developed a mechanism that can change the phase of the gas distribution, which is achieved by hydraulic or electronic control. DVVT and CVVT are both this technology, where DVVT refers to dual variable valve timing, and his valve opening phase has two moments, which can be opened in position 1 or position 2, which can be adjusted according to the speed and load. CVVT is continuously variable valve timing, which can be continuously adjusted between two limit phases in the permissible valve phase, which should be said to achieve better control, but requires a high degree of control accuracy.

Toyota's VVT-i is a CVVT.

cvvt stands for Continue

variable

The abbreviation of valvetiming, translated into Chinese, is continuously variable valve timing mechanism, which is one of the many variable valve timing technologies that have been gradually applied to modern cars in recent years. For example: BMW is called.

Vanos, Toyota calls it VVTI, Honda calls it VTEC, but no matter what it's called, their purpose is to match the best valve overlap angle (valve timing) for different engine operating conditions, but the method of achieving it is different.

So DVVT technology is more advanced

The so-called DVVT is.

The intake and exhaust are all using variable valve technology, which can be understood as:

Dual CVVT.

But there are car logos CVVT, but in fact it is.

DVVT Don't look at the signs. The main thing to look at is the actual odd and even.

Also, it doesn't matter if you have CVVT or not

It depends on the actual effect. VVT is not high-tech anymore. It also depends on the actual power performance.

In fact, these technologies are called variable valve timing, but the names are different, because the manufacturers have registered their own technology, and the same name cannot be used! It is to let the computer control the correct opening time of the engine intake and exhaust valves under different working conditions, and the engine increases the power while reducing fuel consumption, and now many brands of cars use technology; If you have to say which one is better, Honda's i-VTEC performs the best, followed by Toyota's VVT-i, and Hyundai's CVVT is not so good! In fact, Mercedes-Benz, BMW, and Volkswagen have already had this technology!

It's just that they don't put a sign on the rear of the car like Toyota and Honda to hype! Their approach is very low-key, hehe, if you don't believe it, you can take a look at the engines of Mercedes and BMW!

The Great Wall follows the outdated and eliminated VVT technology of Toyota in Japan, and the result is a bit deformed, the car engine is a hard injury for many years, so the Great Wall decided to give up the field of cars at the end of 2014, specializing in SUV series, the Great Wall diesel engine has been in its own research and development, so the diesel engine series is good, and the footsteps are more steady. However, Geely has been focusing on self-service engine research and development from a very early stage, and now uses DVVT technology to be at the forefront of the domestic industry, which is at least synchronized with the development of the international automobile engine industry. Unlike the VVT technology introduced by the Great Wall and imitated and eliminated, it was over after a few years of bluffing, and finally simply gave up the car and didn't do it.

I can't bluff anymore