Set sail1992

Chapter 143 CJ60! (33)

Feeling excited, Xia Muqing hesitated for a moment, but said: "The most I can do is to give you some suggestions. As for whether it will work, I can't guarantee it."

Yang Zhijun was overjoyed: Can you make suggestions? !
It's good to make suggestions!He immediately said: "Director Xia, this time we are going to go deep into the countryside to shoot commercials. You can shoot some material in this area at that time. You can show it to the leaders of your unit. If the leaders feel that these If the material is newsworthy, shouldn’t it be used?”

Xia Muqing's heart skipped a beat!

She had seen Zhang Qihang's advertising plan before, and knew that she really needed to go to the countryside to shoot some shots of powered carts being used in the countryside. She hadn't thought much about it before, but now hearing what Yang Zhijun said, she immediately felt that his words were very strange. It makes sense: if you take back the material from these shots and add some interview shots, after watching it, the leaders will have a general understanding of how much this will help increase rural income and farmers get rich?
Nodding, Xia Muqing said, "Then I'll try."

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In the next few days, Xia Muqing led the filming team to start the pre-production material collection for the advertisement, while Zhang Qihang plunged into the office.

What is he up to?
He is optimizing the CJ50 engine.

The original design of CJ50 is too old. The fuel utilization rate of this engine is seriously insufficient. As a result, although this engine has a full displacement of 49CC, its maximum power is only 1.84 kilowatts, equivalent to about 2.5 horsepower. The hot-selling Suzuki AX100 motorcycle has the same two-stroke gasoline engine as the CJ50, with a displacement of 98cc and a maximum power of 6.3 kilowatts. Then, the maximum power of the CJ100, which is only half of the displacement of the AX50, should at least be Reaching about 3.2 kilowatts is barely enough, and the power of 1.84 kilowatts is really too low—look at the two 4CC-level small pedals, Honda Z50 and DIO, which are currently on sale in Japan. They are both 50CC two-stroke engines. What is the power?
In fact, since the successful introduction of the CJ50, Zhang Qihang has been using his spare time to optimize the CJ50 engine. Now, the entire optimization process is finally basically completed. After finishing the last picture and checking it to confirm that it is correct, Zhang Qihang nodded in satisfaction. Holding the design drawing, Zhang Qihang excitedly approached Tian Wenhua: "Director Tian, ​​I have a new part here, please help me process it."

"New parts? This is the piston of CJ50? No!" Tian Wenhua took the drawing, glanced at it, and frowned immediately: "Manager, what kind of piston is used in the engine?"

The top of the piston of CJ50 is a flat, flat type, but the top of this engine has two shallow depressions. In addition, in terms of size, the diameter of this piston is also larger than that of CJ50. So it is absolutely impossible for this piston to fit into the cylinder head of the CJ50 engine, so the question arises, what kind of piston is used in this engine?
Zhang Qihang said with a smile: "This is the piston used by CJ50."

"This is absolutely impossible!" Tian Wenhua said decisively: "The diameter of this piston is even larger than that of CJ50..."

"That's right, so the engine that matches the piston is called CJ60."

Hearing this, Tian Wenhua was stunned: "CJ60?"

"Yes," Zhang Qihang nodded, and then explained: "In the CJ50 engine we are producing now, the bore and stroke of the piston are 39mm and 41.4mm respectively. Now I keep the stroke of the piston unchanged so that it can continue to be used." The current piston;
At the same time, the cylinder bore was increased, the displacement was increased from the original 49.5CC to 61CC, the cylinder bore-to-stroke ratio was increased, and the torque of the engine at low speeds was optimized. In addition, Mr. Tian, ​​you can see the two small dimples on the top of the piston Is it a mess? "

"Uh..." Looking at the two small pits on the drawing, Director Tian nodded subconsciously: "I see..."

"I don't know if you have an impression of the piston of Jialing-Honda's CB125T motorcycle? The piston of the CB125T also has these two small dimples."

"It seems... yes," Tian Wenhua didn't remember very clearly. He really didn't care about it at first, but now that Zhang Qihang deliberately pointed it out, he immediately paid attention to it: "You mean these two Does the small pit have a special function?"

"Of course," Zhang Qihang nodded and said, "The function of this small dimple is to cooperate with the re-modification of the combustion chamber, which can optimize the state of the mixture in the cylinder, let the mixer form a tumble flow in the combustion chamber, and make the combustion more complete... "

Tian Wenhua's mouth grew wide: "A tumble?"

If tumble flow can be formed in the combustion chamber, the benefits are too great. The biggest advantage is that the utilization rate of fuel is improved, and the combustion is more complete. fuel, and if the same amount of fuel is used, the output power of the engine will be greater. Now not only the diameter of the piston has expanded, but the shape of the combustion chamber has also changed...

Thinking of this, Tian Wenhua tremblingly said: "Manager, how much power can the CJ60 reach?"

"3.4 kilowatts."

"3.4 kilowatts?"

Tian Wenhua's eyes went dark!
The maximum power of the CJ60 is only 1.84 kilowatts. Now after being modified by the manager, it has reached 3.2 kilowatts, almost doubling the power?
If he was in Puling Machinery Factory before, he might not think so much, and would live with a mentality of "just do the job at hand, and other things have nothing to do with me", but in Huateng Machinery Manufacturing Co., Ltd. After working for such a long time, Tian Wenhua's mentality has gradually changed under the influence of his ears and eyes. Especially after the immediate income is linked to his workload and management level, he thinks more. Now he heard Zhang Qihang say The maximum power of this new CJ60 engine can reach 3.4 kilowatts. After the initial shock, excitement followed: "Manager, really? Our new engine can really have a maximum power of 3.4 kilowatts?"

If you can have 3.4 kilowatts, how much can you do!

Zhang Qihang said with a smile: "If you build one, come out and have a look."

When it comes to this, Zhang Qihang actually has some regrets: it is a pity that the current material level and processing conditions are limited. Of course, the most important thing is that the original design of the CJ50 is too backward. The power of 3.4 kilowatts is almost the performance improvement of this engine. limit.

That's right, Tian Wenhua immediately realized: That's right!Whether there is 3.4 kilowatts or not, don’t you know if you build one and take a look?
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PS: Brothers, I'm sorry, I overslept, 555...

(End of this chapter)