For SUVs, strong power is a major reason why many consumers choose this model, and many automakers produce SUV models that use large-displacement engines.

For the two SUVs that Tianming company is about to develop, Zhou Jingming has high hopes, so in terms of power, Zhou Jingming's requirements for this car are very high, which can be seen from the development structure of the engine "V6", at present, Tianming Company's three models, Phoenix brand car, Kirin car and Xiaofuwa car, in addition to the Kirin car is equipped with a rotary engine, the other two models, mainly in-line four-cylinder engine.

Although in the initial period of the company's establishment, at the request of Zhou Jingming, the Engine Research Institute also successfully developed an in-line six-cylinder engine QM6L1, which was originally intended to be used as an optional Phoenix car, but the positioning of the Phoenix car is only a compact car, and the four-cylinder engine has been able to meet the needs of consumers.

Therefore, unless the customer has special requirements, all models produced by Tianming Company are equipped with four-cylinder engines. This time, Zhou Jingming specifically requested that the engine used for the SUV must be a six-cylinder engine, which is enough to see how high Zhou Jingming's requirements for the power of the SUV are.

Of course, the power that a simple six-cylinder engine can provide is still not up to Zhou Jingming's requirements for the power of this SUV, but if it is equipped with a more than six-cylinder engine, the cost of the whole car will rise a lot, which is beyond Zhou Jingming's positioning for this car.

Therefore, if you want to further increase the output of the engine while keeping the number of engine cylinders unchanged, only turbocharging technology can be realized.

The so-called turbocharging technology was invented as early as 1905, and in 1960, General Motors of the United States has tried to equip its small cars with turbocharged engines, but at that time, turbocharging was mainly used in the gasoline engine of the car, and the diesel engine rarely used this technology.

The SAAB99 model launched by the company in 1977 spread turbocharging technology more widely, and it was from that time that turbocharging technology began to really enter the eyes of major car manufacturers.

The main function of turbocharging is to increase the air intake of the engine, thereby increasing the power and torque of the engine, making the vehicle more dynamic. When a turbocharger is installed on an engine, the maximum power can be increased by 40% or more compared to when the turbocharger is not installed, which means that the same engine can output more power after being supercharged.

Take our most common 1.8T turbocharged engine as an example, after supercharging, the power can reach the level of a 2.4L engine, but the fuel consumption is not much higher than that of a 1.8L engine, which is to improve fuel economy and reduce exhaust emissions.

Generally speaking, when a "turbo" or "T" sign appears on the rear of a vehicle, it means that the engine of the car is turbocharged.

According to the way of supercharging, turbocharging can be divided into mechanical supercharging system, air wave supercharging system, exhaust gas turbocharging system and composite supercharging system, and what we call turbocharging generally refers to exhaust gas turbocharging.

"Turbocharging?" Wang Yuanchao curiously took the information handed over by Zhou Jingming, and said while flipping through it, "I have seen this technology in the literature before, but it seems to be used in trucks, can models like SUVs also be used?"

After all, Wang Yuanchao has been in charge of the engine factory for so many years, and he still has a great understanding of engine forward-looking technology, and he also knows a little about this turbocharging technology.

"As long as the engine can be used, it has little to do with the purpose of the vehicle. Now that you know the technology, it's a little more convenient for me to say. Zhou Jingming smiled, and then continued, "You should know that there are many classifications of turbocharging, right?"

Wang Yuanchao nodded, "I probably know a little, but I don't know much about the specific working principle of these turbochargers." ”

"This time I'm going to put the turbo on the V6 engine, which is the most common exhaust gas turbo, and I'll probably explain to you how this turbo works. As he spoke, Zhou Jingming took out a pen and paper, and simply drew a simple diagram of the turbocharger on the paper, and then continued,

"Exhaust gas turbocharging uses the inertial impulse of exhaust gases discharged from the engine to push the turbine in the turbine chamber, which in turn drives the coaxial impeller, and the impeller presses the air sent by the air filter duct to pressurize it into the cylinder. When the engine speed increases, the exhaust gas discharge speed and the speed of the wheel also increase, the impeller will compress more air into the cylinder, the pressure and density of the air can increase to burn more fuel, and the corresponding increase in fuel can increase the output power of the engine. ”

While explaining, Zhou Jingming drew the flow direction of the air flow in the turbocharger on the sketch diagram, so as to vividly represent the working principle of exhaust gas turbocharging.

"The turbocharger we are going to develop this time is a system similar to this, after you go back, first convey such ideas to the engine research institute, if there is anything you don't understand, in the later stage, Tianming University will be responsible for organizing relevant training, I can invite experts in this area from Swedish Saab to give professional guidance and training to our designers. ”

In terms of turbocharging technology, no company can be more authoritative than Saab Company, but it is a pity that Tianming Automobile Company does not have the technology to take advantage of, otherwise Zhou Jingming would have already hit the idea of Saab's turbocharging technology.

"Okay, then I got it. Tomorrow, I will go to the research institute in Gusu City, convene relevant experts to discuss countermeasures, before the formal training, I think it is better to let these technicians take the initiative to understand the technology of turbocharging, otherwise when the experts come, they will hear in the clouds. Wang Yuanchao said with a smile.

"It's better to do this, and active learning is better than passive training. Zhou Jingming nodded, and then looked at He Yingxun again, "Da Xun, for this gearbox, I don't have any special requirements, it is still on the existing manual automatic gearbox to transform, but because it is necessary to access the Quattro system and our own research and development of the time-sharing four-wheel drive system, the design of the front and rear axles must pay special attention, this is the first time our company has developed a four-wheel drive car, and the development must be rigorous." ”

"I know brother-in-law, we have studied the four-wheel drive technology very thoroughly, the development of the gearbox and the axle, you just put your heart in your stomach. He Yingxun said confidently.

After talking about the engine and gearbox for a long time, He Yingxun suddenly asked curiously, "By the way, brother-in-law, this SUV doesn't have a name yet, do you have any ideas?"

Zhou Jingming thought about it seriously, and then suddenly had an idea, "Let's call it Yixuan." ”

This SUV is a gift for a newborn son.

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