Xiao Nan put the car key on the fuel tank cap, and the perfume man pushed APE into the gas station with a very depressed expression, stopped in front of the 93# gasoline fuel dispenser, and took out the fuel card from his pocket to swipe it.

"Wait a minute!" Zuo Longxin hurriedly corrected him: "You added the wrong one, the engine of this car is suitable for 98# gasoline." ”

"I keep adding 93# oil. Xiao Nan said puzzledly: "I didn't feel anything wrong when I ran, and I didn't feel the detonation when I was at high speeds......

"The compression ratio of this engine is 11.7:1, and adding 93# gasoline will affect the ignition accuracy of the engine at high speeds. Zuo Longxin explained: "You don't feel the knock because this engine has a balance shaft, and the V-twin engine is born with a relatively small vibration, but in fact it has affected the power output, if you use 98# gasoline at the beginning, the medium and high speed performance of this engine can be further improved." ”

"Why do you know this engine so clearly?" Xiao Nan asked Zuo Longxin curiously. "Because I set the specifications, like the diameter of the piston and the stroke ratio, I decide what to do, and it would be hellish if I didn't even know those details. Zuo Longxin looked very proud. Xiao Nan looked at him and pursed his lips, but couldn't help but make a sound.

The perfume man filled the fuel tank of Xiao Nan's APE with 98# gasoline, and pushed the car back to return it to Xiao Nan. "Okay, now that we're clear, this matter is over. Xiao Nan said to the perfume man very gracefully.

The perfume man rolled his eyes, he is now a defeated general, he has no temper at all for Xiao Nan, he wants to turn around and leave, he is unwilling, he hesitates for a long time, takes out his mobile phone from his pocket and pulls up the phone book, and asks Xiao Nan: "Beauty, ...... Can you leave me your phone number?"

"What do you want to do?" Xiao Nan immediately straightened his face when he heard this. "Don't get me wrong, beauty, I don't mean anything else......" The perfume man saw that Xiao Nan's face was not good-looking, and hurriedly explained to her: "I lost to you today, but that's because I don't know anything about motorcycles, I want to ...... Another day, let's change to a more formal venue, and I'm going to compete with you again, and if you can still beat me, I'll be convinced of you......"

"Poof......" Xiao Nan couldn't help laughing. "You really don't know whether you live or die, okay, the mobile phone number, you listened, 130XXXXXXXX, remember?"

The perfume man's thumb quickly tapped the phone screen and wrote down Xiao Nan's mobile phone number. "Okay, let's make a decision. By the way, I still want to ask the name of the beautiful woman?"

Xiao Nan gave the guy a fierce look, and the perfume man quickly explained: "Don't get me wrong! I just want to know whose hands I lost......"

"Hmph......" Xiao Nan groaned slightly, but still told him. "Cheng Xiaonan, Cheng bites the gold, the size is small, and the Nan of the Nan tree. ”

"Wang Haojie,Friends call me Ajie。 The perfume man stretched out his right hand to Xiao Nan to shake Xiao Nan's hand, Xiao Nan snorted in a nasal voice, twisted his face to the side and ignored him, causing the guy's hand to freeze in the air in embarrassment.

Wang Haojie blushed a little, and after a pause, he retracted his hand and pretended to scratch his scalp. "Okay, the green mountains don't change the green water, the next time we meet, I will definitely win you!"

"Hmph......" Xiao Nan sneered: "Next time you race with me, it's best to borrow a stronger hammer and bring it with ......."

Wang Haojie took the lead,That group of more than a dozen male and female brand-name fashion young people,Drove away with him one after another。 Outside the gas station, only Xiao Nan and Zuo Longxin were soon left.

"You've been fooled, classmate Cheng Xiaonan. Zuo Longxin smiled and said, "That guy clearly has an intention on you." "So what?" Xiao Nan said with a nonchalant face: "If he wants to find me to drag racing, I can let him lose at any time, if he has other nonsense ideas, I can just step up and leave at any time, I don't believe they can stop me." ”

The tone ...... You're really crazy......" Zuo Longxin smiled and shook his head: "It seems that you are very confident in your car and driving skills!"

"Of course, I assembled this car with one screw and one nut by hand, and I know every detail of it, so of course I am confident. ”

"But I think you still have a lot of problems with this car. Zuo Longxin suddenly changed a very serious expression and preached: "For example, just now you and the man in the 200-meter race, the balance of the body was unstable when you just started, with a driver of your level, it is difficult to imagine that you will make such a low-level mistake, then I can only understand that your car is likely to have major defects in dynamic balance performance." ”

Xiao Nan looked at Zuo Longxin's eyes as if he was looking at a magic stick, obviously not believing his words at all. "I didn't get the balance right at the start because the torque output of the front and rear wheels wasn't consistent, but I don't think there was anything else. Xiao Nan retorted. "And, with my controllability, I'm sure I'll be able to control the instability as soon as it first appears, so I don't think there's anything wrong with that. ”

Zuo Longxin smiled, shook his head and said: "Why did I feel that it was not as easy as you said at all? Don't think I didn't notice, in fact, when we were racing in the corner, when you were overtaken by me in the second corner, it was said that your car had the spare power to accelerate to catch up with me, but you didn't accelerate, what were you worried about at the time?"

Zuo Longxin's words really talked about Xiao Nan's heart disease, and Xiao Nan's face was a little red when he asked back. "Well, even if that's the case, it's because I just loaded the car, and the cooperation between people and cars is not tacit enough, and I can't reach the realm of integration of people and vehicles......"

"You little girl is really hard-mouthed!" Zuo Longxin smiled: "In this way, let me ride your APE for a ride, I will experience your mount, and give you a few pertinent suggestions, okay?"

Xiao Nan stared at Zuo Longxin's eyes for a while, and sighed softly: "Okay, if you want to try it, you can try it." She flashed and gave up the APE handlebar to Zuo Longxin, Zuo Longxin raised her legs and stepped onto Xiao Nan's APE, first familiarized herself with the functions of each instrument and the purpose and stroke of the left and right handles, and then sat down firmly and pressed the ignition button to hit the engine.

"Be careful of the left-hand electric door, the opening of the electric valve and the right-hand throttle opening have a very delicate ratio, if you don't grasp the body well, it is easy to lose balance and hit the street. Xiao Nan was not at ease and said again.

"I remember. Zuo Longxin said and gently unscrewed the electric door in his left hand, although he already knew in advance that the starting torque of this in-wheel motor was quite amazing, and he was ready enough to be mentally prepared, but he was still startled by the sudden rush of APE, AEP was like a frightened wild boar, carrying Zuo Longxin to run on the highway on a rampage, and the body swayed from side to side, scaring Xiao Nan's heart thumping, for fear that the guy would fall to the ground while driving his car.

However, Zuo Longxin is definitely an experienced and responsive motorcycle master, by adjusting the center of gravity of the body a few times to stabilize the balance of the body, he released the clutch to hang the power of the V-cylinder engine, so that the APE is in a state of dual power hybrid output, and then drove it around the middle of the road in the middle of the street flower bed six or seven times around the high speed before stopping.

"I know what's wrong with your car. Zuo Longxin closed the electric door and lifted his legs to get out of the car, and said to Xiao Nan very seriously: "Your car is really the same as I imagined, the balance problem of the body is very serious, if you don't improve it quickly, there will be big problems sooner or later in the future."

"Really?" Xiao Nan was skeptical of Zuo Longxin's words. "Is it that serious?"

"Why am I lying to you about this?" Zuo Longxin said: "Let me ask you, when you started with the front hub motor alone, did you feel that the starting action was impulsive and seemed very irritable?"

"Yes, isn't this a sign of strong power? What's so strange?" Xiao Nan asked in surprise: "Actually, it's not very difficult to control it after getting used to it, this shouldn't be a fatal flaw, right?"

"This is not deadly enough!" Zuo Longxin saw that Xiao Nan was insensitive, and put on an expert face to scare her: "Let me tell you, the reason why the front wheel starts to rush is because the internal enameled wire winding of this hub motor is not wound with sufficient accuracy, and the number of turns of each pole winding is quite different, so that the power and torque of each pole are inconsistent, and the three-phase load is unbalanced, which makes the power output of the hub motor fluctuate, which is the real reason why your car starts to rush." ”

"Uh, is that so?" Zuo Longxin's words reminded Xiao Nan, in fact, Xiao Nan had already noticed the problem he mentioned, but he always thought that it was the technical characteristics of the in-wheel motor, and he didn't think deeply about the real reason at all.

"It's not just that there is a problem with the hub motor!" Zuo Longxin saw that Xiao Nan finally began to waver under his own persuasion, and decided to add more strength to completely convince her: "Also, have your front and rear wheels been dynamically balanced?"

"No ......" Xiao Nan was a little aggrieved: "Where can I find a two-wheel dynamic balance, the car 4S shops on the street are also four-wheel balancers, I just want to do this project and have no place to do it......"

"That'...... Have you done the dynamic balancing of the whole vehicle after your APE is assembled?""No ......" "Has your engine been double-cylinder balanced?" "No ......" "The power of your front wheels is so strong, and you are not afraid that you can't brake at such a small diameter brake disc at high speed?" "I didn't buy a large diameter brake disc that can be installed just right, so I can only install this small diameter, although the braking force is insufficient, but it is better than nothing......"

"And the most important point......" Zuo Longxin saw that Xiao Nan was a little dizzy by what he said at this time, and he was secretly happy in his heart. "The power output of your front and rear wheels is not uniform, so you don't dare to accelerate at will when cornering, I have a way for you to unify the power system of the front and rear wheels, when you control it, it is no longer divided into left and right hands to control the front and rear wheels separately, as long as one hand can control the power output uniformly!"

"Really......? What should I do?" Xiao Nan asked timidly, for the first time in her life, she met a motorcycle master who was more proficient in theory than herself, and when she heard the other party's unfathomable truth, she felt like a beginner.

"I have an idea. Zuo Longxin used the body language of his two hands to signal to Xiao Nan: "Didn't you change the intake system of the engine to electronic fuel injection, it just so happens that the throttle control of the EFI is the same as the electric valve of the hub motor, and the power output is controlled by rotating the Hall induction coil on the handle, I suggest that you only keep the Hall sensor of the right-hand throttle, and use this sensor to control the EFI system and the hub motor at the same time, so as to reduce the operation link ...... when controlling"

"But...... If only one Hall sensor is used, how can the balance of power output of the front and rear wheels be randomly controlled?" Xiao Nan asked suspiciously. "After receiving the signal output by the same sensor, the in-wheel motor and EFI will definitely have different power outputs......

"Hmm...... Indeed, as a personal hobby, your current modification has done the ultimate you can, but ......" Zuo Longxin saw that Xiao Nan had been unconsciously introduced into his preset topic, and secretly smug in his heart: "If you want to make your car have a more powerful performance, especially if your imaginary enemy is the powerful Suzuki Hayabusa, you can only be qualified to compete with Suzuki Hayabusa if you try to make this car get further professional enhancement and modification." ”

"Then what should I do, with my current conditions, it is impossible to do it......" Xiao Nan's head grew when he heard it: "In my friend's locomotive modification and maintenance shop, the most advanced mechanical processing equipment is the boring cylinder machine, and the rest is nothing more than a drilling machine and a grinder......

"Don't worry, when you meet me today, none of these problems are a problem!" Zuo Longxin said proudly, "Do you know what I do?"

Xiao Nan looked at Zuo Longxin's triumphant appearance, shook his head and muttered in a low voice: "How would I know, I'm not a fairy, you only have your name and phone number on your business card~"

"And how do you feel?" "I think you're kind of like ...... The engineer who is responsible for designing the motorcycle? or...... A senior tuning technician for a professional team?"

Zuo Longxin smiled proudly: "Forget it, let's keep some suspense for the time being...... Why don't you come with me to my work unit? I'll let you see our five-axis linkage CNC machining center, what kind of modifications do you want in the future, we can't do it!" His tone was full of temptation, like a weird lollipop who abducted little Lori.

"Go now?" Xiao Nan immediately glanced at Zuo Longxin vigilantly, in fact, she really wanted to go a little bit, but ...... Is this guy's character reliable? Don't be disgusted when you meet an old Yang like that...... "It's too late today, my house is very strict, can you change the day?"

Zuo Longxin also felt that he was in a bit of a hurry at this time, and nodded hurriedly: "Okay, okay...... It seems that it is indeed a little late today, you should go home early to rest, otherwise the family will worry, I have just written down your phone number, don't you also have my business card, I will contact you again in the next few days, and you are welcome to visit my unit when the time comes. ”

"Okay, it's a deal!" Xiao Nan readily agreed. As the two were talking, the mobile phone in Xiao Nan's pocket suddenly rang.

"Hey?" "Hey, I'm Huzi, where did you go, you haven't come back for so long, it can't be that something went wrong on the road, right?"

Xiao Nan looked at Zuo Longxin and said into the phone, "Oh...... Just now, the circuit of the car was running and suddenly there was a short circuit, but I have already eliminated the fault, and now I will rush back. ”

"Well, come back quickly, it's almost nine o'clock in the evening. "Okay, I know~" Xiao Nan hurriedly agreed: "I'm hanging, bye!"

Hanging up the phone, Xiao Nan raised his leg and stepped on APE and turned on the car key to open the electric door. "If it's not a little late today, I really want to go with you to see it!Let's go another day~ I'll go first, bye!"

Zuo Longxin waved his hand, and Xiao Nan controlled the electric valve and accelerator at the same time with his left and right hands, so that the front and rear tires turned 180 degrees in situ under the influence of the speed difference, and then suddenly started, and quickly disappeared into the thick night of the Third Ring Road elevated like an arrow from the string.

Zuo Longxin watched Xiao Nan's APE go away, until the small red taillight was completely engulfed by the night. Then he took out his phone from his pocket and dialed a series of numbers, and soon the number was connected.

"Hey, is it Mr. Zhao?" "Ah...... Hello, it's Mr. Zuo, is there anything urgent to call me so late?Oh, we are working on the audition, and it is expected that the report will be delivered to you the day after tomorrow at the latest...... ""Thank you for your hard work." I also have good news for you. "What...... The good news?"

"The most important heroine in our plan, I have found the best candidate......" Zuo Longxin couldn't help but raise the corners of his mouth and smiled proudly.

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This chapter involves too much professional knowledge about locomotives, but in view of the fact that Comrade Xiao Zuo wants to use this to attract our Xiao Nan to join his plan, if he doesn't pretend to be professional, Xiao Nan won't be cold to him, so he has to write like this. The author really doesn't want to drag these specialized content to the next chapter, so this chapter is super long~

[bookid=3089809,bookname="Camellia on the shore of Qingyang Lake"] This is a new book by my friend Chunjuan'er, everyone support it~