Stuttgart, Bosch headquarters, engine laboratory.

When he arrived in Stuttgart, it happened to be the morning here, and Zhou Jingming didn't care about the jet lag, so he got into a Bosch car and came here.

The person in charge of receiving him was still Royce, who met him at the technical exchange meeting.

"Mr. Zhou, according to the design drawings and technical requirements you provided, we have processed three sets of core components, and then we are ready to carry out a series of related tests, first of all, for these core components for performance and stability verification test, followed by durability and reliability test, if these parts pass the experimental requirements, the next will be the bench test and the final loading test of the whole machine. ”

After a brief greeting, Royce began to introduce the next experimental process in detail.

Zhou Jingming nodded while listening, Bosch does have a complete set of process rules in the development of new products, and its meticulous and strict development of new products reflects the pursuit of craftsmanship by the Germans in all aspects.

And Zhou Jingming also carefully observed the experimental conditions here, all kinds of advanced experimental equipment are available, before this, Zhou Jingming was to visit the Volkswagen engine laboratory, compared with the two, Zhou Jingming found that the scale of the Bosch laboratory is larger, and the professionalism is stronger!

Choosing to work with Bosch rather than with the company to develop in-cylinder direct injection, Zhou Jingming felt that this decision was too correct.

"Can you take a look at the samples produced?" Zhou Jingming asked.

"Okay, please come with me. Royce smiled, and then took Zhou Jingming to a warehouse in the corner of the laboratory, "These are the core components for the experiment, all of which are processed in accordance with your technical requirements, Mr. Zhou, using today's most advanced machine tools, and the accuracy requirements must be met." ”

Zhou Jingming picked up an injector and put it in his hand, looked at it carefully, and had to admit that the process level of Bosch is indeed much better than that in China.

The reason why the domestic automobile industry cannot develop is that on the one hand, it is because the basic industry is not good, and many key parts of the car require manufacturing processes, and domestic manufacturers cannot do it at all.

Not only the fuel injector, but also the other parts that need to be restructured, such as high-pressure oil pumps, intake pipes and even pistons, the samples produced by Bosch have very good accuracy, and good samples will save a lot of unnecessary trouble for the next test.

It is precisely because of this that Zhou Jingming stipulated in the cooperation agreement that Bosch should provide relevant production line technology, otherwise, China will never be able to mass-produce in-cylinder direct injection engines.

"If these parts pass the test and the performance test of the whole machine, what type of engine are you going to use for loading?" Zhou Jingming put down the fuel injector in his hand and continued to ask.

"Because of the tight time, the redesign of an engine will take a long time, so we selected a Bosch engine produced in-house, after a certain amount of modification and strengthening, as the carrier of the follow-up machine experiment, has been restructured and will soon be able to come off the production line. Royce replied.

Then, under the leadership of Royce, Zhou Jingming and Wang Yuanchao took a general turn in the engine laboratory, and a technician from the engine laboratory was responsible for introducing the relevant experimental equipment and the general working principle to them.

"Mr. Zhou, Mr. Wang, the performance and reliability test of the parts is scheduled for tomorrow morning, and the two of you are invited to participate on time. After visiting the laboratory, Royce sent the two people to the hotel, and said to Zhou Jingming and Wang Yuanchao before leaving.

After a full day of jet lag, Zhou Jingming has fully adapted to the environment here, but after all, Wang Yuanchao is going abroad for the first time, and a day's rest is not enough for him to adapt to life here, so he still looks a little haggard and angry.

As for the performance and stability test, Zhou Jingming believes that as long as Bosch produces according to its own drawings, there will be absolutely no problem, but just in case, the performance of these parts is tested before the reliability and durability test.

"Injector atomization particle size is within the design range"

"The mist distribution meets the requirements"

"The working pressure of the high-pressure oil pump is 15MPa, which meets the design requirements"

"The head of the oil pump is 232m, which meets the requirements of use. ”

…………

After the relevant parts were installed on the test bench, one data after another was reported from the experimenter's mouth, and as Zhou Jingming expected, all the parts and components fully met the requirements in terms of performance!

In addition to the flawless design, Bosch's state-of-the-art manufacturing processes also ensure consistent component performance.

After about two hours, all the parts have passed the performance test, and the next step is to start the reliability and durability test, which is carried out simultaneously in order to shorten the test period.

The reliability test is mainly based on cyclic fatigue test, which tests the reliability and durability of parts in the extreme environment and normal working conditions.

Before the test, Bosch experimenters have conducted in-depth research on the working parameters and ultimate load environment of the test, and even if the correct working parameters are correct or not, the reliability of the test results will be directly affected.

"Both, the results of the reliability test will not be answered until tomorrow morning, and there will be our technicians staring here, so I will take you to visit our company's engine production line." Not long after the reliability test began, Royce said to Zhou Jingming with a smile.

Generally speaking, if it is linked to fatigue testing, the test period will be very long.

Zhou Jingming didn't plan to stay in the laboratory all the time, so he readily agreed to Royce's proposal.

In the next two days, Zhou Jingming would come to the laboratory every day to check the progress and results of the experiment, and the results of the first reliability test were completely OK, but in order to ensure the correctness of the experimental results, the person in charge of the laboratory did a reliability test again, but the results still met the requirements.

In this way, today is the fourth day that Zhou Jingming came here, and after the end of the parts test, he finally ushered in the whole machine experiment, which is what Zhou Jingming is most concerned about when he came to Germany this time.

The test took the form of a comparative test, in which three engines equipped with carburetor injection, electronic injection and in-cylinder direct injection technology were all placed on the engine bench, and three experimenters stood in front of each bench to record the experimental data.

Nearly half an hour has passed since the beginning of the experiment, Zhou Jingming just stood there, although his face looked very calm, but deep down he was very nervous, if the results of this experiment were not ideal, there would be many adjustments to be made in the future, which would undoubtedly increase the burden for Zhou Jingming.

Time passed minute by minute, and the sound of the engine on the bench became smaller and smaller, which meant that the whole machine experiment was nearing the end, and after another ten minutes, the experiment officially ended, and the three experimenters responsible for recording the data also took the report to Zhou Jingming for the first time.

Zhou Jingming stared at the three reports with both eyes at the same time, comparing them one by one, and finally stopped at the maximum output torque.

"The output torque of direct injection in the cylinder is not as large as that of electronic injection?"

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