Automotive Black Technology Chapter 947: : A bunch of fools…taken advantage of! (Ten thousand rewards will be added!)
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"Don't be so resistant, Director Li. I am also responsible for the project."
Liu Shengyuan was stunned. It was obvious that he was not used to this kind of communication.
But where was Li Fanyu's identity, and he had to take over it - this made him angry, and the smile on his face became colder.
Li Fanyu shook his head, "What on earth do you want to verify? We Zhengxin only participated in this project at the request of your Yishu Group, and now you are playing this trick with me, what is the purpose of it. If you have a better power supplier and don’t want to cooperate with Zhengxin, just say so. So far, Zhengxin has not sold any products that are not popular, so don’t worry, just say so. ”
Li Fanyu's direct showdown made everyone in the inspection team quite embarrassed.
Because everyone knows clearly that the Jingwei project is inseparable from Poseidon H at this stage.
"Director Li, that's not what we meant." Seeing that the leader was in difficulty, Wang Cheng immediately stepped forward to explain.
"That's it, Director Li. According to our original plan, taking into account the particularity of the Jingwei project requiring long-term and high-load operations overseas, we plan to use the current technology for oil supply, which is relatively open and the supply is relatively stable. Swedish NVF fuel supply system. In this case, it may conflict with the fuel supply system of Poseidon H46 series engines, so I want to evaluate it carefully and make corresponding adjustments. ”
Li Fanyu frowned, "The Poseidon H series engine is used as the main propulsion force of the ship. According to our technical plan, it can meet the needs of three types of oil: natural gas, conventional marine diesel and heavy oil. And these three oils need to be switched back and forth. Therefore, the fuel supply system naturally needs to be modified by us. If there is any modification, it should be made by your fuel supply system supplier with Poseidon H as the core, right?"
"You can't say that, Director Li. Just like a car, a ship needs to consider all aspects before deciding on each assembly. A stable and efficient power system is the main part of the ship, but a stable fuel supply , is also an important part to ensure the efficiency of the ship. Especially for the Jingwei project where the work is carried out for a long time on the islands and reefs, fuel supply is a big issue, and we have to be cautious in this regard. ”
After Wang Cheng finished speaking, experts immediately expressed their support, "Wang Gong is right. Our Yuchai has had in-depth cooperation with Swedish NVF. This company's communication fuel supply technology is quite mature. The company itself It is also one of the top 500 companies in the world and has considerable strength. In fact, the company’s dual-fuel supply system is one of the best in the field. It is absolutely suitable to use Zhengxin’s Poseidon H with this fuel supply system. ”
"Well, that's what Miao Gong said. When Weichai provided power solutions for domestic 10,000-ton container ships, we also cooperated with NVF. Their technology is very mature and their equipment technology is quite high. Dual-fuel supply They do a good job in the oil system. What impressed me the most is their switching of the dual-fuel oil supply system. It is clean and smooth, and the impact on the engine is much smaller than that of other manufacturers. ”
Seeing a group of people supporting Wang Cheng's statement, Liu Shengyuan smiled slightly and glanced at Li Fanyu, "How about it? Director Li."
Li Fan smiled foolishly.
He knows his own stuff. Considering the switching problem when three types of fuels are used in common, the fuel supply system of Poseidon H46 main series engines was specially optimized by him and Liu Qing’s team.
Li Fanyu believes that the fuel supply system of Poseidon H can also do what those Laushizi experts said just now.
Seeing everyone praising foreigners' things so much at this time, I really held my breath in my heart.
He turned around and waved to an angry Liu Qing, "Qingzi, have we done the fuel switching test?"
Liu Qing glared at the expert engineers on the inspection team, "The diesel status calibration has not been completed yet. Do you think the fuel switching test has been done? There is no such time!"
Li Fanyu nodded and patted the guy on the shoulder, "Just in time, the experts from the inspection team have objections to our technology, so let's do it on site and let everyone see how our fuel supply works. Whether the system can achieve the expected results is not as good as foreign technology."
The way Liu Qing looked at him, she got the key point.
"It's done!" He said, waving to the Zhengxin engineers who had been gearing up for a long time, "Come on, brothers. Let's show it to the experts."
Everyone held their breath and naturally had to show off in front of the so-called authorities and experts in the field. The fuel supply system and multi-fuel switching device were quickly prepared, and the test began.
Due to certain differences in performance between natural gas and diesel, in the Poseidon H series dual-fuel engine system, the electronic control system and fuel supply system have been matched and optimized accordingly.
At the beginning of the research and development, Li Fanyu followed Han Lao's idea and regarded the substitution rate of natural gas for diesel as an important performance indicator.
So the fuel supply principle of Poseidon H is to greatly increase the replacement rate of gas for diesel, so as to give full play to the significant advantages of natural gas fuel and improve the economy of ship navigation.
Considering that the improvement of replacement rate is restricted by a series of issues such as combustion performance, working stability, and emissions.
So the Poseidon H gas replacement diesel plan is to use diesel only as fuel at idle speed, use a small replacement rate at medium and small loads, and the replacement rate can quickly reach a maximum value at high loads. ,
Taking into account the efficiency improvement process of medium-speed engines, this alternative is also linear and can respond quickly according to the engine status.
In order to coordinately control the amount of natural gas, air and diesel, so that the replacement rate of natural gas for diesel under each working condition is optimal, achieving the best combustion performance of dual-fuel engines is an important issue that must be solved in the future
Ask a question. Li Fanyu has made the most sophisticated designs for the electronic control and fuel supply systems.
As far as the fuel supply and injection system is concerned, conventional injection is abandoned and micro-injection is adopted.
When the engine works in dual-fuel mode, the actuator is coordinated through mechanical and electronic control, and the most appropriate fuel supply is achieved through a single fuel injection pump.
Whether it is more advanced than those abroad, Li Fanyu can't say because he doesn't know what the level is abroad.
However, it can definitely meet the needs of Poseidon H46 series engines!
It is also the most suitable for Poseidon H46 series!
In Li Fanyu's view, this is like buying clothes - no matter how good the brand is or how expensive the price is, it is not as good as a custom-made fit!
Testing is proceeding in an orderly manner.
Looking at the Poseidon H4616V working vigorously, several experts from Weichai and Yuchai started talking.
"The fuel supply system of Swedish NVF is really good and precise. The 10,000-ton ship we shipped last year was the same one we purchased. Not to mention the responsiveness, the fuel switching is also neat. It is better than that of the American Cresener The company’s PioneS is much higher.”
"Well, we have also used that package for shipping. It's good, but a bit expensive."
"Yes, let's not talk about anything else. Let's just talk about their III-541 dual-fuel switching system's single fuel supply pump, which has a maximum flow rate of 1/4 ton of gas per minute, but it can operate at 2 times at peak flow rate. It closes completely within seconds. Wow, but it’s really expensive. One set costs more than 1.3 million, but the lifespan is only 300 hours.”
“The technical content is so high, so the more expensive it is, the more expensive it will be.”
"Yes, the fuel injection is precise enough, which is good for the engine and saves a lot of fuel."
Li Fanyu, who was standing next to a few people, grinned angrily when he heard this.
……
Finally, after more than an hour, all the performance indicators of the fuel supply system were displayed on the display screen of the test bench.
After seeing the test results, the experts who originally looked confident and commented on the Poseidon H's oil supply system were silent!
Because...
Based on this result, Poseidon H’s fuel supply system performs much better than the Swedish NVF that they touted, whether in terms of sensitivity, fuel supply accuracy, or gas-diesel fuel substitution linearity!
"How is this possible?"
Seeing such results, a Yuchai expert exclaimed.
Li Fanyu gritted his teeth and directly signaled Liu Qing to stop all the testing equipment.
He personally took a wrench and a special disassembly tool and dismantled the oily one-way pump on the oil supply system.
Ignoring the brown diesel that stained his sleeves, he walked up to the experts and Liu Shengyuan just now.
He lifted the one-way pump and said: "This is made by Zhengxin. The maximum gas flow can reach half a ton in one minute, and it can be closed without damage in 0.5 seconds. In addition to supplying gas, it is also possible to use no other oil. Direct injection of diesel and heavy fuel oil. Guess how much this thing costs?"
"Um...two million?"
Everyone was confused by his sudden movements, but when they saw him asking questions, some people still tentatively answered.
Li Fan smiled foolishly and put the one-way pump on the ground. "You guessed too much. The cost is 750. If you add one point more, I will be your grandson."
"A bunch of idiots. Taken advantage of."
Looking at the group of people's wide mouths and wide eyes, he squeezed out from between his teeth.