Chapter 151: Carburetor and EFI

Nande looked at the A6 shape design drawings in his hand, his heart was shocked, a pair of rough and steady hands that often deal with machinery, he couldn't suppress the excitement in his heart and trembled slightly, he swallowed a mouthful of saliva with difficulty, and asked nervously: "Boss, this is the new car of the C-type platform that we are going to develop?" ”

Ye Kai nodded calmly and said, "Yes, look at it, is there anything else that needs to be modified?" ”

Revise? Nande thought with a wry smile in his heart, such an eye-catching design, even those Austrian designers who are famous for their design, can only kneel when they see such a design. Pen ~ fun ~ pavilion www.biquge.info

Nande didn't say anything, because he really couldn't find the words to express it, so he just handed the drawings in his hand to the other people around him who were about to turn into giraffes, and let the others continue their shock!

After waiting for about half an hour, the three drawings returned to Nande's hands, and Nande pinched the drawings in his hands, but he was really reluctant to return them to Ye Kai.

Ye Kai took all this into his eyes, and did not open his mouth to ask Nande for it, but cleared his throat and said: "You have seen the appearance design of our head office on the new model, do you have any comments you want to make?" ”

In the face of such a perfect design plan, who can still have an opinion? Who can speak out of their conscience? I'm afraid that if such a person really comes out, without Ye Kai's move, everyone may use an old fist to blast him out of the conference room, because such a person with poor character is really not worthy of working with them.

Ye Kai's gaze swept over everyone's faces one by one, and everywhere he looked, he shook his head very tacitly, Ye Kai saw that everyone had no objections, so he continued: "Since everyone has no opinion, then after the meeting, Nande handed over the drawings to the automobile shape design department, and they converted the drawings into physical objects and conducted various tests. ”

As soon as Ye Kai's words fell, he saw that everyone's eyes were on a middle-aged man with slightly curly hair sitting in the middle, and the middle-aged man's face was filled with excitement. Seeing this scene, without Nande's introduction, Ye Kai also knew that this man was the person in charge of the appearance design department.

"Because it is a new car shape, so big that the chassis, the headlights of the trail, we have made changes, and SÜD has to hand over these parts to the corresponding departments for processing." Ye Kai continued. "Nande, you have a lot of responsibilities and a lot of departments, you can hand over the previous work to your assistant, and you can concentrate on the development of new models. Because, we're going to buy the full-time all-wheel drive technology back soon, and when the time comes, all of our high-end models will have a full-time all-wheel drive system, and you'll be responsible for implementing that technology into our new cars. ”

Nande nodded calmly.

Ye Kai continued: "A car has almost finished talking, now it's the turn of the engine, Nande, you tell me what the situation of our engine is." ”

"We now produce our own engines." Nander thought for a moment and replied. "It's basically the same as the engines of other car manufacturers on the market. And as Europe and the Americas are becoming more and more stringent in the management of automobile exhaust emissions, we are concentrating on tackling key problems in engine technology, because the carburetor used in the engine is the main culprit of excessive exhaust gas, and auto parts manufacturers all over the world are tackling key problems in this area, and in general, there is little progress. ”

Of course, there is not much progress, no matter how to improve the carburetor, how can its inherent defects not be repaired, only the subsequent EFI fuel technology is the best technical solution to make up for this defect, but no matter how to improve, as long as the fuel is used, in the face of increasingly stringent automobile exhaust emission standards, it is impossible to fully meet the requirements, otherwise the previous life of Audi and many car factories in order to be listed, will not take data fraud to fool the test.

According to Ye Kai's memory, the current exhaust emission standards have been relatively strict, forcing the car factory to begin to seek a solution to replace the carburetor, and the continuous improvement of the EFI technology is being developed in the laboratory, until the previous life of 86 years, after the European exhaust emission standards were more stringent, the car factory was forced to forcibly eliminate the carburetor technology in the country where the standard was implemented.

The carburetor, a component that has been accompanied by the engine since the advent of the car, mainly uses high-speed air flow to atomize gasoline into very small oil droplets, and fully mixes it with air, and then the cylinder sucks the mixture into and ignites the workmanship, but the control of the carburetor is not precise enough, and it cannot quickly respond to the change of engine load and adjust the concentration of the mixture during normal driving. As a result, the engine is often in a state of insufficient combustion, so the content of harmful substances in the exhaust emissions cannot meet the increasingly stringent emission regulations, and at the same time, it will produce high fuel consumption.

Spare parts suppliers led by Bosch, Siemens, Ford, General Motors, Denso and other manufacturers are now working hard to develop EFI technology. The EFI technology is to pressurize the gasoline, and directly spray the gasoline into the intake pipe in the form of a mist through high pressure, and then be sucked into the cylinder. Because the nozzle can control the amount of fuel injected more precisely, the mixture concentration can be adjusted at any time, so that the operation response is sensitive and the driving performance is improved.

Therefore, the key to EFI technology is how to accurately control the amount of fuel injected, which cannot be completed simply by mechanical ability, but must be handed over to the electronic device that is more stable than the human brain, which is commonly known as the engine ECU.

"Are you talking about EFI technology?" Ye Kai asked. "How's the technology going?"

"Yes." Nande replied respectfully. "EFI technology appeared very early, the initial use of discrete components to control the EFI components, but the effect is not obvious, and later the use of customized microprocessors to control the EFI components, but because the hardware and software are in the exploration stage, there are great limitations in the application, there are also some vehicles using this set of components, although there is no obvious difference between the use and carburetors, but the harmful substances of automobile exhaust emissions have an obvious attenuation effect."

There is an obvious role on the right, the current control device is limited by the development of electronic technology, not fully show the technical advantages of EFI, but also have to wait for the supplier of EFI components to develop a special microprocessor, the fuel injector to carry out further improvements.

In the past life, with the advent of dedicated microprocessors, the previously complex control circuits were simplified and more functions were achieved with fewer integrated circuits.