"I think the direction of R&D is the right one. Pen, fun, pavilion www. biquge。 info" Ye Kai said. "And you must be wondering why I'm bringing the team here."

The team brought over by Ye Kai this time was relatively large, and the original employees of Aodi sat in two piles, which was very eye-catching. In the past, there were some department heads who thought that these people were here to replace them, and they were more or less repulsed, even Nande was no exception, because every company is like this, after changing the boss, the boss will always install his cronies in.

However, since Ye Kai announced that Nande would continue to be the head of the R&D department, Nande has let go of his thoughts, and at the same time he is also curious about what the team brought by Ye Kai is doing.

didn't let Nande and them wait for a long time, and soon Ye Kai solved their doubts: "There are two teams I brought, one is related to the factory, which is specifically responsible for transforming the factory; The other is to develop ECUs for EFI components. This team used to be in Fairchild, a well-known company in the semiconductor industry in the United States, and was mainly responsible for the development of the F8 microprocessor. ”

"This microprocessor is going to be used as the main control of the ECU, so this team will be involved in the research and development of the engine, mainly responsible for the improvement of the chip, the testing and sampling of various parameters of the engine. Therefore, after the SÜD meeting, you will arrange them all. ”

"I'm going to talk about a little bit of my insight into EFI technology." Ye Kai continued. "Since the 60s, with the increasing number of cars, the rising exhaust emissions and fuel consumption of automobiles have plagued people, and different exhaust emission standards have been introduced in various countries, forcing manufacturers to look for a new technology device that can purify the exhaust of the car and save fuel to replace the carburetor that has been around for decades, and electronic fuel injection technology came into being in this situation."

So, in the late 60s, Bosch bought a company to test the EFI technology that was not successful, and on this basis, successfully developed the D-type electronically controlled gasoline injection device for use in Volkswagen cars. This kind of device is based on the pressure in the intake pipe as a parameter, but compared with the carburetor, it still has the disadvantages of complex structure, high cost and instability. In response to these shortcomings, Bosch has developed a type of electronically controlled gasoline injection device called L-shape, which takes the air flow in the intake pipe as a parameter, and can directly determine the intake air volume according to the relationship between the intake air flow and the engine speed, and then inject the corresponding gasoline. ”

Ye Kai knew that this kind of device was widely used by automobile manufacturing companies in Europe and Japan due to its reasonable design and reliable operation, and laid the Zou type of electronically controlled fuel injection device in the previous life.

And from this year, General Motors, Ford, Fuso's Toyota, Mitsubishi, Nissan and other automobile companies have launched their own electronically controlled gasoline injection devices, especially the promotion of multi-valve engines, so that electronically controlled injection technology has been rapidly popularized and applied. Therefore, in the past life, more than 95% of the fuel supply systems of cars in major automobile producing countries such as Omi Fuso were equipped with fuel injection devices.

After briefly recalling the advantages of EFI in his mind, Ye Kai continued: "Therefore, the EFI engine is very different from the carburetor engine, and the operation method is also quite different. When starting an EFI engine (including cold start), there is generally no need to step on the accelerator. Because the EFI engine has the functions of cold start and thickening, automatic cold car fast idle, it can ensure that the engine starts smoothly regardless of whether it is cold or hot. ”

"Before and during the start of the engine, it is ineffective to repeatedly and quickly press the accelerator pedal to increase the amount of fuel injected as in the case of a starting carburetor engine. Because the accelerator pedal of the EFI engine only controls the opening of the throttle, its fuel injection volume is completely determined by the computer according to the air intake parameters; In the state of lack of fuel in the tank, the EFI engine should not run for a long time. This is because electric petrol pumps are cooled by the fuel that flows through the petrol pump. Running the engine for a long time when the tank is starved of fuel can cause the electric gasoline pump to burn out due to overheating. ”

"Therefore, we have to develop the EFI system at all costs." Ye Kai made a concluding speech. "What kind of talent is lacking, you can recruit, what key basic technology is missing, you can buy, Nande I will give you the power, and I will also ask the finance to give you the green light for your funds, I hope you can be worthy of the company's trust in you."

"Okay, no problem." Nande, who was full of energy, stood up, looked a little red and thick-necked because of excitement, and assured Ye Kai in a hoarse voice, and then his tone slowed down, and he asked Ye Kai embarrassedly: "Boss, can you continue to talk about your insights on EFI technology?" Especially in terms of technical implementation. ”

This can be said, after all, it is my own company, pointing out a clear path in advance, which can avoid them from taking detours, wasting research funds and wasting time, Ye Kai thought in his heart, but said modestly: "I don't know much about the technical implementation, but with reference to the technology circulating on the market, I discussed with the think tank team of the head office for a long time, verified a lot of solutions, and finally decided that our company's EFI technology is mainly developing in two aspects." ”

Hearing that Ye Kai was going to reveal the company's future technological development direction, the people in the conference room held their breath, pricked up their ears, concentrated, and listened attentively to Ye Kai's next words, for fear of missing a word. That's the lovely thing about the technicians, as long as they have the technology they're interested in, all other distractions will disappear in an instant.

"We will focus on the development of multi-point injection systems and single-point injection systems." Ye Kai said word by word. "The multi-point injection system is to install a central injection device at the intake valve of each cylinder, and the ECU controls the injection device to inject fuel, and because of this injection method, the fuel distribution uniformity is good. But the corresponding control system can become complex and costly. Therefore, this injection system is only applied to high-end models for the time being. ”

The single-point injection system is to install a central injection device above the throttle valve, and the sequential injection method is used to concentrate the fuel injection by 1-2 injectors. Due to the simple structure, this system has few failures and is easy to maintain and adjust, so we mainly apply it to low-end models, such as the A1 model that will be developed. ”

As soon as I heard Ye Kai talk about the working principles of the two systems, I automatically simulated the working mode of the two systems in my mind, and felt that the plan was indeed completely feasible, and I couldn't help but look at Ye Kai with admiration.

Ye Kai cheekily enjoyed the adoring gaze of everyone, waved his big hand, and yelled very heroically: "Break the meeting!" ”