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Back in the factory, Yang Zhi immediately began to deploy related tasks, after all, the agreement with the Jiangling factory has time requirements. In order to produce a qualified prototype, the first thing to do is the digestion technology. Although Suzuki's engines are only used in mini cars, and the technology is not advanced, there are still considerable challenges for the fledgling Huaxia passenger automobile industry and the Dongfeng plant, which used to mainly produce diesel engines.

In Japan and Southeast Asia, Suzuki's mini cars are powered by two different powertrains: a 543-cc three-cylinder engine and a 797-cc four-cylinder engine. However, when importing products and technologies from Suzuki, in order to facilitate unification, reduce production complexity and pressure on the supply of spare parts, the Chinese side decided to use one power for all products, that is, the DA462 inline-four engine with a displacement of 797 cc (its technology is derived from the Suzuki F8A), with a maximum power of 35 horsepower (26kW) / 3500rpm and a maximum torque of 51 N?m/ 3500rpm, matched with a 4-speed manual gearbox with a maximum speed of 95km/h.

After organizing some middle-level cadres, technical backbones and skilled workers in the whole factory to study, Yang Zhi decomposed the production tasks and decided that the casting workshop, spare parts workshop and assembly workshop were responsible for the processing tasks of the department's components.

In addition to the cylinder block, piston and crankshaft and other components entrusted to the 37216 factory processing, oil pan and other parts are temporarily provided by the Gangneung factory, the rest of the exhaust valves, camshafts, intake exhaust manifolds, timing belts, valve groups, spark plugs, fuel injectors and other components are purchased by the factory or produced by themselves.

Although I am not familiar with the gasoline engine introduced from Suzuki, the so-called skinny camel is bigger than a horse, and Dongfeng Plant is also a veteran manufacturer with more than 20 years of diesel engine production experience, so it naturally has some precipitation and accumulation of its own. In particular, a series of drastic reform measures implemented by Yang Zhi after coming to the factory have rectified the situation, so that the haze shrouded in the factory has gradually dissipated, and the people's hearts have begun to unite again. Although it cannot be ruled out that there are a few people who have benefited in the past who have been beaten back to their original form after Liu Mingguang and others were defeated, on the whole, the current situation of stability and unity in the factory is the best period in recent years. Now, seeing that the factory may get a once-in-a-lifetime opportunity to regain its former liveliness and prosperity, who doesn't feel excited, and who doesn't want to dedicate their efforts?

Therefore, with the concerted efforts of the whole factory, it took only 3 days for the first batch of 2 prototypes to be assembled in the assembly workshop.

As soon as the news came out, the whole factory was rushing to tell each other, and everyone seemed to be able to see that the dawn of hope was coming. Yang Zhi was also very excited when he heard it, he didn't expect it to be completed so quickly. It is worthy of being a veteran professional manufacturer!

Now we are waiting for the final process - the commissioning. Early the next morning, whether on duty or not, the people in the factory gathered in the assembly workshop. It's just three layers inside and three layers outside, and it's impenetrable. Everyone's eyes were focused on the engine on the real platform in the empty space of the workshop.

After the connection of various parts of the system was completed, with Yang Zhi's order, the operator ignited the engine, and the machine started running. The surveyor's eyes were glued to all kinds of measuring instruments, and he kept loudly reporting the number "speed 800, horsepower 10; rpm 1200, horsepower 14; Rpm 1800, hp 17, rev 2500, hp 20, rpm 3000, hp 30, rpm 3500, hp 35! ”

When they heard that the machine had reached the design speed and power output, the whole factory was jubilant, and some people even jumped for joy. Unfortunately, this jubilation did not last long, and the surveyor's anxious and nervous voice came out: "The power output is decreasing!" 35, 30, 27, 25 "Then with a puff of black smoke, the engine completely stopped running.

This sudden change startled all the people present suddenly fell silent, and the smiles of many people also froze on their faces. It was all fine at the beginning, why did it suddenly go wrong? After slowly relieving themselves, everyone began to talk. Some said that the quality of the machine was not up to par, some said that the test method was wrong, some began to complain that the equipment in the factory was too poor, and some sighed

Yang Zhi and Zhang Shanguang glanced at each other, nodded to each other, and then asked the leaders of various departments to be responsible for evacuating the workers, and then convened a meeting of the technical and management personnel of the whole plant and the person in charge of the processing process to study and judge the reason.

When ordinary workers were present, these people could still hold back, but when only relevant personnel were left in the workshop, many people couldn't help but start discussing. After all, as in-depth participants, they know more than ordinary employees about how much effort they have put into the manufacturing of these prototypes during this time, and they have greater expectations! Not to mention anything else, in order to coordinate the relevant components, in the past few days, Yang Zhi took several middle-level cadres to run back and forth between the 37216 factory and the Jiangling factory no less than 10 times. In order to maximize the processing accuracy under the existing equipment conditions, the technicians and workshop leaders in the factory also rushed into it, and they have not slept a single sleep or eaten a serious meal in the past few days. The most touching thing is that Wang Zhijian, the deputy chief engineer who is over 60 years old and has been in poor health during this time, also dragged his sick body, insisted on interpreting technical information to the front-line workers, and stayed up all night with the young and middle-aged people.

Although he was also very anxious and disappointed, Yang Zhi was reluctant to say anything without actual inspection, after all, without investigation, he would not have the right to speak. After the machine cooled down slightly, Yang Zhi asked the workers wearing heat-insulating gloves to open the engine cylinder head so that the technicians could check what was wrong.

It didn't seem to see anything, but when the combustion chamber was opened, everyone was stunned by the sight in front of them. I saw that the cylinder wall was scraped out of a deep groove, and the cylinder was full of metal chips!

It turned out to be a pull cylinder! Most of the people present were insiders, so they naturally judged the essence of the problem. But then a more critical question was placed in front of everyone, why did it pull the cylinder?

It is important to know that the cylinder pulling as a heavy fault of the engine refers to the deformation of the piston and the friction of the cylinder wall due to the poor quality of the piston or the high temperature during operation, and the deep groove of the cylinder inner wall is scraped by the piston, and the friction pair of the piston, piston ring and cylinder wall loses tightness, thereby reducing the compression pressure of the cylinder and losing the power. When it is strict, it will puff out blue-blue smoke. The cause of the fault is the wear or fracture of the piston ring and cylinder wall on the cylinder piston, which causes the originally tight cylinder to be discharged through the exhaust system after the lubricating oil at the bottom of the engine compartment enters the cylinder chamber for combustion.

However, these pistons are all provided by the Gangneung factory, and they have been used in large quantities on the Gangneung brand mini cars that are on sale? But there weren't many problems, and there were no related fault complaints, which is really strange.

If you can't find the real reason for the failure of the pulling cylinder, then the follow-up improvement and avoidance will naturally be impossible to talk about, and everyone will inevitably have a shadow in their hearts.