Traveling through 70's wine

Taking advantage of the time, Wen Qing also picked some tea leaves.

Now there are 30 acres of tea garden, 20 acres of orchard, and 30 acres of medicinal garden in the space. The remaining to acres of land are not planted. She wants to make wine, and the demand for sorghum is relatively large, so it is better to plant sorghum.

The sorghum used for brewing is different from the sorghum we eat every day.

The famous liquor in Guizhou Province uses the local red tassel glutinous sorghum, which has solid, plump and uniform grains, small grains with thick skins and high starch content, which is suitable for the special multiple roasting brewing process of this liquor.

Wuliang Liquor uses glutinous red sorghum from southern Sichuan, while Jin Liquor uses hybrid sorghum from Jinzhou. The different varieties of sorghum create the unique flavors of these liquors.

Wen Qing went to the agricultural supply store in Yulin Town, where Erxia Village belonged, and found three kinds of sorghum seeds in the store: japonica sorghum, red glutinous sorghum, and hybrid sorghum. Wen Qing bought 500 kilograms of red glutinous sorghum seeds.

The 50 acres of sorghum she currently has in her space is planted with a variety from Yunnan called Hazhi sorghum, a tall-stalked, yellow-red sorghum variety that is also used locally for making wine. Wen Qing plans to plant glutinous sorghum on the remaining land.

She previously brewed light-flavor liquor using earthenware jars. In the future, her winery will want to brew strong-flavor liquor, so she decided to start experimenting in the space first.

Wen Qing cleared out the tools and farm machinery in the original parking shed in the space, leaving only the tools for brewing.

He took a hoe, drew a line in the corner of the shed, and dug four mud cellars, all of which were 5 feet wide, 8 feet long, and 4 feet deep. Strong-aroma liquor must be fermented in mud cellars. The cellar accounts for % of the quality of the liquor, and the quality of the cellar depends on the cellar mud. Famous strong-aroma liquor factories all have cellars with a long history, so Wen Qing’s first step is to cultivate the cellar mud.

Wen Qing recalled the wine-making experience that Mr. Zhao had told her. The cellar mud is the clay used to seal the cellar and make the cellar bottom. Its main purpose is to provide a suitable environment for the wine-making microbial flora. The quality of the wine cellar is especially important for strong-flavor liquor. The same grains, the same wine-making process, can produce different wines, and eighty percent of the reason lies in the wine cellar.

It is best to choose clean and sand-free yellow mud for the cellar mud. The land in Wen Qing's space happened to be yellow mud. She cleared a piece of lakeshore by the lake and separated two inner and outer lake embankments. The lake water flowed in from high places and out from low places, forming a drop that constantly washed away the yellow mud. The soil in the space was already clean, and after being washed, it became even cleaner.

She grabbed a handful of washed yellow mud and kneaded it between her fingers. The mud was fine and sticky and could basically be used.

Wen Qing dug up the soaked yellow mud and took it outside the shed to dry. He then dug up some yellow mud from somewhere else and poured it between the lake embankments to allow the lake water to wash it. This was preparation for the wine cellar in the backyard.

After the yellow mud was slightly dry, she applied the yellow mud to the bottom and walls of the mud cellar, and poured the lees left over from winemaking into the mud cellar, and even added some sorghum and rice. After filling four cellars, Wen Qing sealed the mud cellars with yellow mud to allow further fermentation.

It is impossible to build a cellar in one go, so Wen Qing plans to take it slowly.

The summer vacation passed quickly and school started again, welcoming the second batch of college students after the resumption of the college entrance examination. The campus became lively again and Wen Qing also devoted herself to studying in the new semester.

After school started, Professor Xu found her and said, "Mr. Wen, our department has taken on an engine optimization project. Do you want to participate?" Professor Xu was very impressed by Wen Qing's innovative ability through the tea-picking machine.

Wen Qing immediately said, "Thank you, Professor Xu. I am willing to participate, but my level is too low." Her voice gradually became lower.

"You are only a freshman and lack professional knowledge. You should mainly go to feel the atmosphere of project development and learn how to do project development."

"Ok."

The name of this project is "Automobile Gasoline Engine Technology Transformation Project". An office has been set up on the second floor of the school's experimental building. When Wen Qing arrived in the afternoon, there were already three students in the office, two of whom were juniors and one was a sophomore. After a while, Professor Xu and several other teachers also arrived.

Professor Xu Ziqi asked everyone to sit down and said to them, "In order to develop our country's automobile industry, the Ministry of Machinery has assigned our school a gasoline engine modification project. We plan to complete this project in four months, or one semester."

He introduced the project team members. He served as the team leader. Professor Niu Guoguang, Associate Professor Wang Huazhen, and Associate Professor Liu Meng from the Department of Mechanical Engineering were the main members. Qin Yuyu and Wu Ming, juniors, Zhao Zhiping, sophomore, and Wen Qing, freshman, were responsible for assisting.

Professor Xu took out a document and placed it under the projector. It was called "Automobile Gasoline Engine Technology Transformation Project" and he continued, "At present, according to the information we have, ordinary gasoline engines are still mainly inline four-cylinder engines, but in order to improve fuel efficiency, various countries have introduced many new technologies.

Japan has developed variable valve timing technology, which has great fuel economy; France has developed the ECS engine with variable intake assist timing technology to create a high-speed engine; Germany and the United States both have advanced engines.

Our country imitated Russian technology and still does not have its own engine technology."

The engine consists of five major systems and two major mechanisms. The five major systems are the fuel supply system, engine lubrication system, engine cooling system, engine exhaust system, and engine starting system; the two major mechanisms are the crank-connecting rod mechanism and the valve mechanism.

China's industrial base was weak, and the earliest automobile engines were made by hand by workers. They could only be considered "usable" at best. In terms of power, noise, vibration, fuel consumption, emissions and reliability, there was a large gap between them and advanced foreign technologies.

Professor Xu conducted a preliminary analysis of the project's optimization direction, and then divided the project team members into four groups, each consisting of a teacher and a student.

Professor Niu is an expert in internal combustion engines. He is in charge of the development of the fuel system and starting system with Qin Yuyu. Professor Wang is an expert in mechanics. He is in charge of the transformation of the two major mechanisms with Wen Qing. Professor Liu is a materials expert. He is in charge of the exhaust system design with Zhao Zhiping. Professor Xu is a mechanical design expert. He is in charge of the lubrication system design with Wu Ming.

After the meeting, Wen Qing found Professor Wang Huazhen, a female professor in her 50s who returned from studying abroad in the early days of the People's Republic of China. She had experienced many ups and downs. She returned from the United States in the early 74s, was sent down to the rural area of ​​Shandong in the mid-s, and returned to school to teach in .

The hard times did not make her depressed. When she returned to school, she seemed to make up for the wasted time and rekindled the fighting spirit of her youth. She immediately devoted herself to teaching and scientific research and was extremely busy every day.

Today, she was wearing a dress called Bragi. Although she was over fifty years old and her face was weathered by the years, she was in good spirits, had a graceful figure and elegant manners. She was the image of an intellectual in Wen Qing's mind.

Professor Wang saw Wen Qing coming over and took the initiative to greet her: "You are Wen Qing, right? I heard Professor Xu mention you. He said that you did a great job in the development of the tea picking machine."

Wen Qing waved her hands embarrassedly and said, "No, no, Professor Xu, you are too kind. I have learned a lot from my teachers. The tea picking machine is very simple and not worth mentioning."

Hearing this, Professor Wang's smile deepened and he said, "Come, let's discuss how to tackle this problem."

The two walked to a table and sat down.

Professor Wang said: "We must first determine the type of engine. Should we develop a high-speed engine or a low-speed engine? A high-speed engine has better power output than a low-speed engine, while a low-speed engine has greater torque. Each has its own advantages. What do you think?"

Wen Qing said: "Based on domestic road conditions and usage scenarios, I think low-speed engines have greater torque at low speeds, which is more suitable for existing roads. The car starts more steadily and has better fuel economy."

She went on to say: “Low-speed engines are not only suitable for heavy trucks, but also for ordinary cars, and have a wider range of uses.”

Teacher Wang nodded. "I agree with you. We can take the development of low-speed engines as the starting point for this optimization, and optimize the carburetor and cylinder. I will communicate with Professor Xu. This week we will focus on the design of the cylinder."

After discussion, Wen Qing started to design the engine body under the guidance of Professor Wang Huazhen. Professor Wang was personally responsible for the design of the piston-connecting rod assembly and the crankshaft-flywheel assembly.

After leaving, Wen Qing went to the library to look for the latest foreign automobile industry magazines, but unfortunately, all Wen Qing could find were foreign books from the 1950s.

Wen Qing took out her drawing book and started thinking about the design of the cylinder of a low-speed engine and the relationship between the power of the piston and the cylinder.

This semester, Wen Qing will study theoretical mechanics, assembly language, mechanical principles, and mechanical drawing. She goes to the library every day to prepare for her homework and regularly borrows extracurricular books designated by her teacher. This engine modification project will help her study mechanics and mechanical design.