"Such a cylinder head designer can not meet the requirements of direct injection in the cylinder, you see, this part is counted in the combustion chamber, such a mechanism is not conducive to the movement of the air flow in the combustion chamber and the formation of the mixed gas, and here, if the mixed gas is ignited, the propagation of the flame will also be disturbed......"

Zhou Jingming took the cylinder head drawings designed by Wang Yuanchao and commented carefully.

The division of labor between the two people is very clear, the core components in the direct injection of the cylinder, the high-pressure oil pump and the injector, are all responsible for Zhou Jingming, and the minor components such as the cylinder head and the intake pipe are handed over to Wang Yuanchao, as for the follow-up electronic control components, Zhou Jingming intends to complete the design of these specific structures, and then consider.

Wang Yuanchao held several cylinder heads of other engines in his hand, thoughtfully, these cylinder heads, both on the Shencheng brand car, but also VR6 engine just designed, Wang Yuanchao was originally referring to these cylinder heads, coupled with the special requirements of direct injection in the cylinder, made such a design, I thought it was not bad, but I didn't expect there to be so many defects.

For designers in the 80s, because computer technology is not yet mature, technology has not yet been applied to engineering, if you put it in the back, only need a computer simulation, Zhou Jingming can just say the content is very intuitive to Wang Yuanchao, but now, can only rely on his own imagination to understand.

However, once there is an opportunity, Zhou Jingming will not hesitate to introduce computers to assist in design.

"If you still don't understand, I can give you my design ideas, and you can compare them and see where the differences are. Seeing that Wang Yuanchao had been silent, Zhou Jingming was worried that it would hit his self-confidence, so he said so.

"Let me think about it first, tomorrow I want to go to the VR6 engine project team again, their experimental conditions are good, I will observe it on the spot at that time." Wang Yuanchao shook his head and said.

"It's the best way, if you can figure it out yourself, it will be a valuable experience for your future design work. ”

"Don't just talk about me, how is the high-pressure oil pump on your side?" asked Wang Yuanchao, leaning his head over.

"The rest is okay, but the lift of the oil pump has not been completely determined, which also needs to be related to the specific performance of the engine, the life of the roller tappet and the profile of the drive cam, I still need to do further theoretical calculations, but it should be around 3.5MM. Zhou Jingming pointed to the drawings on the table and said.

Wang Yuanchao seriously picked up the drawings and looked at them, compared to his only preliminary design drawings, Zhou Jingming was responsible for the design of the high-pressure oil pump, which was much more detailed, the specific installation location, the injection pressure of the oil pump and even the model and production materials, all marked out, once the lift was determined, then the design of the high-pressure oil pump was completed.

The two of them obviously started work at the same time, and Zhou Jingming's design structure was more complex than his own, but the progress was faster than his own, which made Wang Yuanchao have to admire.

The next day, Zhou Jingming took Wang Yuanchao to the VR6 engine joint project team again, and with the help of the instruments and equipment of the project team, he once again strengthened his understanding of the engine injection system.

Two days later, Su Wangting also took several teachers from Runzhou Institute of Technology to the innovation studio, and they were responsible for the body styling design has made a breakthrough, according to the principle of aerodynamics, they have used the concept of streamlining to the extreme, but they are not engaged in industrial design after all, theoretical design may not be a problem, but if it rises to the level of aesthetics, it may be a little unsatisfactory.

"Here, the front fender shrinks forward, and the rear fender shrinks backwards, and at the same time, the windshield glass is as flat as possible on the premise of ensuring the driver's wide field of vision, and the roof should be smoothly transitioned, as well as the front engine hood, rear trunk lid and the compartment should be smoothly and smoothly connected, so that it looks like the whole body shape is integrated......

Zhou Jingming held a pencil in his hand, and analyzed the sketches and partial drawings brought by Su Wangting in detail, and Su Wangting and others were also listening and making records, they may not be bad in terms of theoretical research, but in terms of body aesthetics, they can't compare to Zhou Jingming, after all, this kind of rounded body shape makes them who are used to seeing the square body, and they don't feel much beauty at all.

"Teachers, reducing the drag coefficient is only a goal of the body design, but not all the goals, and from the design just now, there are obvious protrusions in the body decorations such as the lights, which is not conducive to reducing the drag coefficient for high-speed cars, so although the drag coefficient calculated by your theory is about 0.35, the actual drag coefficient must be far more than that. ”

After reporting the body design project, Zhou Jingming introduced the direct injection project they were studying to several teachers.

"Mr. Su, I have to trouble you again in this aspect of body design, but relying on theoretical calculations alone, it is impossible to further reduce the wind resistance coefficient, and it is best to do a wind tunnel test to effectively test the results of the design. Zhou Jingming took Su Wangting outside the studio and said as he walked.

"The wind tunnel laboratory needs a lot of money to build, where do you get the money to build it? Su Wangting said with a wry smile.

"Don't worry about money, Mr. Su, what do you think we are doing in the tank for direct injection, as long as this patent is in our hands, no one will spend money to buy it. Zhou Jingming replied with a smile.

In a few months, the design of direct injection in the cylinder will come to an end, and then it will be time to lay out the field of patent application.

***

The time soon came to August, and Zhou Jingming had seen the scorching summer in Shencheng, especially at this time, there was no concept of air conditioning in China, and only an electric fan was squeaking and turning in the stuffy cabin.

After more than four months of hard work, the design of the main components of the direct injection in the cylinder has basically been completed, but because of the limited experimental conditions, Zhou Jingming did not have the opportunity to optimize these designs, but this does not prevent the next patent application, because the patent is more focused on the "idea", as for the follow-up commercial value, further development is needed.

After all, the engine parameters of each company are different, and the parameters of direct injection in the cylinder will also be different.

"Cylinder head, high-pressure oil pump, fuel injector, piston ......" design drawings of one part after another, were placed on the table by Zhou Jingming in an orderly manner, each drawing is marked with detailed technical requirements, and under the drawings of these parts is a complete assembly drawing.

"Okay, let's start applying for patents and writing papers one by one. After all the drawings were ready, Zhou Jingming rubbed his hands and looked at Wang Yuanchao again, "In this way, I am responsible for the application of the patent, as for the paper of direct injection in the cylinder, you will write it, third brother, let's act separately, it's time to give the automobile industry a dose of medicine!"

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