In the past two years, the progress of domestic automobiles has been obvious to all, as the eldest son of the new Chinese automobile industry, the development of Hongqi Automobile in recent years has attracted much attention, especially what kind of engine Hongqi uses, whether it can be localized is a hot discussion.
Due to the blue whale engine of Chang'an in the past two years, chery's Kunpeng engine reputation and quality have steadily improved, and the entire domestic engine industry has shown a situation of a hundred flowers.
But in large-displacement engines, independent brands still have a long way to go. Judging from the fact that there are already mass-produced models, there are only the 3.0 T V6 twin-turbo engine of the Great Wall and the 3.0 T V6 supercharged engine of the Hongqi.
The two models are both 3.0 displacement, but the wind evaluation is very different, today let us understand where the gap between the two engines is.
First of all, from the engine data.
Great Wall's 3.0T engine has a maximum power of 260KW and a peak torque of 500 Nm.
The Engine of the Hongqi 3.0T has a maximum power of 248KW and a peak torque of 445 Nm.
Purely from the data, the red flag has fallen into the downwind.
The performance of the data is only one aspect, and the bigger difference between the two is in the way the pressurization is carried out.
The Great Wall 3.0T engine uses turbocharging, and it is the world's first V6 engine to use a dual VTG turbocharger, but it has achieved brand surpassing in terms of technological breakthroughs.
The biggest role of the VTG supercharger is that the ultra-high efficiency can always be maintained under different operating conditions. The dynamic response is very good, and the power delay caused by the common turbocharging is relatively rare on the Great Wall's 3.0T engine. The overall power output is smoother. Compensates for the lack of power caused by the Miller cycle in technology.
This power combination has a global perspective and is also one of the technologies located at the head.
At present, the biggest unknown of the Great Wall 3.0T engine lies in the durability of the VTG supercharger, which also requires time and case verification. It is believed that the Great Wall can make up for this shortcoming through technology.
Hongqi's 3.0T engine supercharging method is completely different, in today's turbocharging prevalence, or the use of traditional mechanical supercharging, the advantage is to completely eliminate the delay caused by turbocharging. The overall power output is faster and smoother.
But the biggest problem of mechanical supercharging is still mechanical loss, after all, such a high-intensity work, the power loss at high speed will be greater, the biggest problem is the fuel economy problem. More fuel consumption than a normal turbocharged engine.
In addition to the pressurization method and the oil supply method, the Great Wall and Hongqi have also taken two completely different roads.
Great Wall adopts two parallel dual injection systems of direct injection + airway injection, and is also one of the most advanced technologies in the industry, such as Volkswagen's EA888 engine and Toyota's 2.0T engine using this fuel supply mode.
The advantage of the dual injection system is that the use of two injection methods will make better use of fuel economy and reduce fuel consumption. At the same time, it can also reduce the problem of carbon deposition, after all, such a high-powered engine, if the low-speed driving time of urban road sections is too long, carbon deposition is always a problem that cannot be avoided.
The Great Wall engine adopts the direct injection of fuel in the cylinder, which is one of the more conservative oil supply technologies. Therefore, there is still a certain gap compared with the Great Wall in terms of fuel consumption and emissions.
Hongqi 3.0T engine is not useless, using a relatively advanced mid-mounted oil pressure control valve double VVT design, timing chain placed in the front section of the engine, the intake tract design also adopts the design concept of variable rolling current. In order to achieve smoother power, the red flag also changed the length of the piston connecting rod and the design of the piston top.
It is worth mentioning that the new generation of Hongqi V6 engine has been successfully trial-produced, and the news released so far has been learned that the maximum power is 340KW and the peak torque is 600 Nm. In terms of data performance, it has surpassed the current 3.0T engine of the Great Wall and is already comparable to The high-power version of Audi's EA839.
Through the comparison of the above aspects, I believe that everyone has an understanding of the current performance of domestic engines. On the whole, this 3.0T engine of the Great Wall has more advantages, after all, it is the latest work of the Great Wall. Hongqi's 3.0T engine has been on the market for about 2 years, and it is normal to have a gap.
The engine design of Hongqi can be seen in the shadow of the reference Totidi EA837 engine, but due to a variety of reasons, it has not completely copied the design, and has also been optimized in many aspects.
Engine development is not an overnight thing, often after years of hard work and experience accumulation. Especially for high-end engines like this, each breakthrough in a technical bottleneck needs to improve the technical level several times.
In the early stage of research and development, there will inevitably be a large amount of personnel and financial investment, and it is likely to be in a state of insufficient income for a long time. But only by breaking through these technical bottlenecks can the future road of domestic automobiles become wider and wider. Although the road ahead is very long, the eldest son of the Republic, hongqi, still has to go step by step and go down in a down-to-earth manner.