Set sail1992

Chapter 144 Really Made It (13)

With Zhang Qihang's order, the entire production department took action immediately.

Because the CJ60 only expanded the cylinder on the basis of the CJ50, most parts can be used in common with the CJ50, and even the new cylinder can be processed on the basis of the original cylinder except for the piston, so soon, A sample engine was processed and assembled, and presented to everyone.

After fixing and connecting the engine in place on the engine test bench, Zhang Qihang fixed the spark plugs and ignition coils he had prepared earlier with the engine, and at the same time connected the ignition coils to the storage battery.

"what……"

At this moment, Tian Wenhua, who had been standing beside Zhang Qihang, suddenly gave a cry of surprise, and then looked carefully at the ignition coil and spark plug that Zhang Qihang had just installed, and then said to Zhang Qihang: "Manager, I Looking at the spark plugs and ignition coils used on this new engine, they seem to be different from those used on the CJ50."

Is there such a thing?

Under Tian Wenhua's reminder, everyone who hadn't noticed this small detail before quickly looked at the spark plug and ignition coil. If you didn't look closely, everyone didn't notice it, but if you look carefully, don't say it, it's really like this, everyone I soon discovered the difference between the CJ60 engine in front of me and the familiar CJ50: the spark plug of this CJ60 engine seems to be thicker, and the ignition coil is also larger.

This is because everyone is too familiar with CJ50, if not, everyone would not be able to find this subtle difference at all.

Unexpectedly, Zhang Qihang actually laughed: "Is it just that the ignition coil and spark plug are different? Old Tian, ​​take a closer look, besides the difference between the ignition coil and spark plug, are there any other differences?"

Apart from the ignition coil and spark plug, is there any difference?

Tian Wenhua and the master craftsmen of Puling Machinery Factory quickly looked over carefully, and then frowned: It’s nothing different, everyone is already familiar with CJ50, even if you just close your eyes and touch it with your hands What can be different...

"Battery!"

Someone exclaimed: "This battery is 12 volts! The battery of CJ50 is 6 volts!"

Is this battery 12 volts?

Everyone really didn't notice this before, but now they heard people say that, and quickly looked at the battery.

Looking at it, isn't it? The battery in front of me is indeed a 12-volt battery, and the huge red Phoenix logo on it is particularly conspicuous.

Powering the ignition coil with 12 volts?
Everyone was surprised, you know, the electrical system of CJ50 is 6 volts, but the CJ60 in front of you is actually using 12 volts for ignition?

Facing everyone's surprised eyes, Zhang Qihang nodded affirmatively: "That's right, the electrical and circuit systems of CJ60 are 12 volts, and only 12 volts can provide stronger ignition energy, otherwise, why would it just expand the displacement?" 20%, but the maximum power has increased from 1.8KW to 3.4KW?"

Yup!

Only then did everyone react, and then nodded repeatedly: With the CJ50 originally only having a voltage of 6 volts, even if you want to increase the ignition energy, you can't do it, but if you increase the circuit voltage to 12 volts, you can provide more powerful spark plugs. In this way, with the increased displacement, optimized shape of the piston and the combustion chamber, perhaps the CJ60 can really achieve a maximum power of 3.4 kilowatts.

Raising the voltage from 6 volts to 12 volts can not only provide more powerful ignition energy for the ignition system, but also has more benefits, such as the hardware foundation for this CJ60 engine to be equipped with a starter motor, while the original 6 volts There is no way to use electric ignition.

Under everyone's watchful eyes, Zhang Qihang lightly pressed the recoil several times to fully lubricate the inside of the engine, and then pressed the recoil start lever heavily and quickly, accompanied by a crisp "da da..." sound, this The CJ60 engine was started smoothly.

"Is this successful?"

Tian Wenhua's eyes widened, and he looked at the CJ50 engine on the test bench in front of him in disbelief, which looked almost indistinguishable from the CJ60: Did it succeed so smoothly?

Zhang Qihang shook his head: "It's too early to say success, and it's hard to say whether it can reach the designed maximum output power of 3.4KW."

From the prototype to the finalization of an engine, it has to go through reliability, durability, fatigue, fuel consumption and tests under different loads. Even if the CJ60 in front of you is simply expanded from the CJ50, under the current conditions, it can It takes at least two or three months of repeated tests, and today's test is to test the power.

The engine data on the test bench shows that as the engine speed continues to rise, the output power of the engine is also increasing, from 0.2KW just started, to 1.84KW soon...

Seeing this data, someone exclaimed...

"1.84KW."

"That's right, it's only in the early 4000s, which is already equivalent to the maximum power of our CJ50."

"Looking at it like this, maybe it's really possible to reach 3.4KW."

"Hush! Don't talk anymore, it's already over 2.5KW..."

…………

The data showed that on the stage, the maximum output power of this CJ60 continued to rise, and finally stabilized at 3.43KW.

3.43KW?

Seeing the data displayed on the display stand, everyone was stunned: such a small engine can burst out a maximum power of 3.43KW, which is equivalent to 4.6 horsepower?
"good……"

Zhang Qihang is very satisfied: Is my improvement still very successful?
Tian Wenhua's eyes sparkled with excitement: "Manager, this new engine can almost double CJ50!"

"Um……"

"What do you think about this engine?" Tian Wenhua said excitedly, "Could it be that our company is going to produce motorcycles?"

Zhang Qihang laughed: "It's too early to talk about the production of motorcycles. Now we can only say that our engine has a maximum output power of 4.6 horsepower, but reliability, stability, fuel consumption, durability... these have not been tested yet. , how to use it, we will talk about it when the final result comes out.”

That being said, Zhang Qihang is not really worried. In fact, the basic redundancy design of every engine is very high, even for motorcycle engines, which are famous for squeezing design redundancy. Motorcycle riders around 2010 should be familiar with a modification method: cylinder expansion modification kit.

An ordinary 125CC motorcycle can even expand the displacement to 175CC through a cylinder expansion kit, a motorcycle with a 150CC displacement can expand the cylinder to 200CC, and there is even a single cylinder expansion kit from 250CC to 350CC. In order to solve the heat dissipation problem, an external oil radiator is even required. Even such a large expansion of the cylinder has little impact on the service life of the engine. It is conceivable that the original design has great redundancy potential.

(End of this chapter)