The car giant started by marrying the daughter of the king

Chapter 51: Shuuichi Surrender
Jiang Hui's technical level is very high, and Cheng Tao knew this before.

But Cheng Tao had been working in other fields before, so his experience was relatively shallow.

Today was different. Just an explanation of a carburetor was enough for him to fully appreciate Jiang Hui's unfathomable professional skills.

The new generation engine uses the carburetor just designed by Jiang Hui, which can not only increase the output power but also reduce fuel consumption.

It is absolutely rare that such contradictory technical indicators can be achieved by upgrading a single component.

"Representative Jiang, in addition to upgrading the carburetor, is there any room for improvement in other parts of our 492Q gasoline engine?"

Hu Shuiwen, director of the Design Department of the First Interior Design Institute, who came with Cheng Tao, continued to ask with anticipation.

"Of course there are, and there are a lot of them."

If Jiang Hui wants to make a splash, he certainly can’t just upgrade one part to make everyone submit.

The engine structure consists of two major mechanisms: the crank-connecting rod mechanism and the valve mechanism, and five major systems: cooling system, fuel supply system, lubrication system, ignition system, and starting system.

In any place, various engine companies in later generations have made many improvements to produce engines with ultra-high thermal efficiency.

For example, the 2.5L inline four-cylinder engine produced by Shuuchi has an output power of only 75 horsepower, or 55 kilowatts.

但是后世人家本田飞度搭载的型号L15B2的1.5L直喷自然进气发动机，最大功率131马力/6600rpm，最大扭矩155牛米/4600rpm。

The maximum power of the Accord high-power version 1.5T turbocharged engine is 194 horsepower and the maximum torque is 260 Nm.

This is still a 1.5L engine. If it were a 2.5L engine, it would be even better.

As for Shuuichi's current engine, there are many areas that can be improved for Jiang Hui.

It’s just that after many parts were upgraded, it was impossible to find a manufacturer that could match them in a short period of time, so they couldn’t be taken out.

For example, timing system and variable valve technology, as well as turbocharging technology and direct injection technology...

"For example, we can redesign the cylinder head and change its combustion chamber."

Jiang Hui continued to sketch on the blackboard as he spoke.

"Our current combustion chamber is a simple wedge-shaped combustion chamber, which has a simpler and more compact structure."

"It can form a squeezing vortex at the end of compression, which can produce a high compression ratio, so the combustion speed is faster and the power is better. It was one of the mainstreams in the 20s."

"After all, its combustion chamber area is large, which can prevent abnormal combustion, but it has a big disadvantage, which is large heat loss and high fuel consumption."

"Foreign countries have gradually phased out this type of combustion chamber in passenger cars."

Experts will know if there is one as soon as they take action.

Cheng Tao and Hu Shuiwen had never heard of the things Jiang Hui explained before.

They don't even understand some of the specific principles of combustion.

I only now realize that such a simple combustion chamber seems to be very sophisticated?
"This time we changed it to a hemispherical combustion chamber, which can be made more compact."

"The engine's valves are arranged in a transverse V shape, so the valve train becomes relatively complex."

"However, since this combustion chamber has a small heat dissipation area, it is conducive to promoting complete combustion of fuel and reducing harmful gases in exhaust gas, which is beneficial to exhaust purification. I think most passenger car engines will adopt this combustion chamber in the future."

Jiang Hui gave his own judgment very affirmatively.

After all, this is something that has been proven by later generations. Most car engines use this, and it definitely has scientific reasons. "Of course, the combustion chamber is not entirely on the cylinder head. We can also change the structure of the top of the piston. After all, the top of the piston and the combustion chamber on the cylinder head together form the space for gasoline combustion."

Immediately afterwards, Jiang Hui continued to introduce his ideas on piston improvement to Cheng Tao and others.

In addition to changes in the shape of the piston top, the piston structure has also been optimized.

Especially the piston ring on the piston, Jiang Hui emphasized its importance and the idea behind this improvement.

Don’t underestimate the piston ring, it’s just a simple circle and seems very inconspicuous.

But it is actually the core component inside the fuel engine. It works with the cylinder, piston, cylinder wall, etc. to seal the fuel gas.

Early piston rings were made by casting, but with the advancement of technology, high-power steel piston rings were born.

And with the continuous improvement of engine function and environmental requirements, various advanced surface treatments are applied, such as thermal spraying, electroplating, chrome plating, gas nitriding, physical deposition, surface coating, zinc-manganese phosphating treatment, etc., which greatly improve the function of piston rings.

The engine piston ring in Shounei is still cast. Jiang Hui just changes it to steel and increases the electroplating requirements, which can improve the engine power to a certain extent.

This is definitely a very meaningful upgrade and improvement project.

At the same time, Jiang Hui also put forward some ideas for other parts of the engine.

"By changing the shape of the piston top and combustion chamber, increasing the compression ratio, and reducing the mass of cast pistons, connecting rods, crankshafts and other components, the engine can rotate more easily."

"In this way, the power is increased and the fuel consumption is reduced."

No matter which engine parts are improved, Jiang Hui focuses on the two themes of increasing power and reducing fuel consumption.

Some changes satisfy one or the other, and some satisfy both.

The people who were listening to Jiang Hui's explanation below were surprised at first, then surprised again later, and then slowly realized that there were no more surprises.

Because there are so many surprises, they are almost scares.

"In addition, I think the shape of the camshaft can be changed appropriately. By changing the shape, the valve lift can be increased from 9.0mm to 9.5mm."

"Don't underestimate this 0.5mm. It can significantly increase the cylinder's air filling rate, thereby increasing output power."

Shuuei had been worried for a long time and had no idea how to increase the engine power, but when it came to Jiang Hui, various ideas popped up one after another.

Cheng Tao and Hu Shuiwen were completely numb from listening.

Their impression of Jiang Hui has undergone another subversive change.

If the admiration before was more of a courtesy, then now it is a submission from the heart.

There was no way. Faced with absolute technical strength, they had no intention of resisting.

"In addition, we can also upgrade the connecting rod bearings and crankshaft bearings by replacing their materials with composite metal materials..."

Although more than a dozen improvements have been proposed, Jiang Hui does not seem to have any intention of stopping.

All kinds of wonderful ideas are still being output continuously.

It’s time for a new round of recommendation PK, please read it~~


(End of this chapter)