Chapter 51 Shouchi Surrender
Jiang Hui’s technical level is very high. Cheng Tao knew this before.
But since he was in other fields before, Cheng Tao’s experience was relatively not that deep.
Today was different. Just a description of the carburetor had already given him a full glimpse of 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 realized through the upgrade of one part.
“Representative Jiang, in addition to upgrading the carburetor, is there room for improvement in other parts of our 492Q gasoline engine?”
Shouuchi Design who came with Cheng Tao Director Hu Shuiwen continued to ask expectantly.
"Of course there are, and there are many."
If Jiang Hui wants to become a blockbuster, he definitely can't just upgrade one part to make everyone surrender.
The two major mechanisms in the engine structure are the crank connecting rod mechanism and the valve mechanism, and the five major systems are the cooling system, the fuel supply system, the lubrication system, the ignition system, and the starting system.
Everywhere, various engine companies in later generations have made many improvements, and only then have engines with ultra-high thermal efficiency.
For example, the 2.5L inline four-cylinder engine produced in Shouchi has an output of only 75 horsepower, which is 55 kilowatts.
But the Honda Fit of later generations is equipped with a 1.5L direct-injection naturally aspirated engine model L15B2, with a maximum power of 131 horsepower/6600rpm and a maximum torque of 155 Nm/4600rpm.
The Accord high-power version of the 1.5T turbocharged engine has a maximum power of 194 horsepower and a maximum torque of 260 Nm.
This is still a 1.5L engine. If it were a 2.5L engine, it would go without saying.
As for the current engine in Shouchi, for Jiang Hui, there are too many areas that can be improved.
It’s just that after upgrading many parts, we couldn’t find a manufacturer that could match them in a short period of time, so there was no way to get them out.
For example, timing system and variable valve technology, as well as turbocharging technology, in-cylinder direct injection technology...
“For example, the cylinder head, we can redesign it and change it. Its combustion chamber”
Jiang Hui continued to draw sketches on the blackboard as he spoke.
“Our current combustion chamber is a simple wedge-shaped combustion chamber. The structure of this combustion chamber is relatively simple and compact.”
“At the end of compression, a squeezing vortex can be formed, which can produce High compression ratio, resulting in faster combustion and better power, was one of the mainstreams in the 1960s."
"After all, its large combustion chamber area can prevent abnormal combustion, but there is a very important problem. The biggest disadvantages are large heat loss and high fuel consumption. "
"This type of combustion chamber has been slowly eliminated in passenger cars abroad."
Experts will know if there is one as soon as they take action.
Cheng Tao and Hu Shuiwen had never understood the things Jiang Hui explained before.
They have not even understood some of the specific principles of combustion.
Now I know that such a simple combustion chamber seems to be very sophisticated?
“This time we changed it to a hemispherical combustion chamber, and the structure of this combustion chamber can be further made more compact.”
“The engine’s valves are arranged in a transverse V-shape, and the valve mechanism becomes relatively complicated.”
“However, due to the small heat dissipation area of this combustion chamber, it is beneficial to promote complete combustion of fuel and reduce emissions. It is good for exhaust purification to remove harmful gases in the air. I think most passenger car engines will use this kind of combustion chamber in the future.”
Jiang Hui gave his opinion very definitely.
After all, this is something that has been proven by later generations. Most of the things used in car engines are absolutely scientifically justified. "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 for 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 his ideas for this improvement.
Although the piston ring is just a simple circle, it seems very inconspicuous.
But it is actually the core component inside the fuel engine. It completes the sealing of fuel gas together with the cylinder, piston, cylinder wall, etc.
Early piston rings were formed by casting, but with the advancement of technology, high-power piston rings made of steel were born.
And with the continuous improvement of engine function and environmental requirements, various advanced surface treatments are applied, such as thermal spraying, electroplating, chromium plating, gas nitriding, physical deposition, surface coating, zinc-manganese series Phosphating treatment, etc., greatly improves the function of piston rings.
The engine piston ring in the first place is still cast. Jiang Hui just changed it to steel first and added some electroplating requirements, so that the engine power can be improved 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 on 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 improved. On the contrary, it has been reduced.”
No matter which engine parts are improved, Jiang Hui focuses on the two themes of increasing power and reducing fuel consumption.
Some changes meet one of the requirements, and some meet both requirements.
Everyone listening to Jiang Hui's explanation below was surprised from the beginning, then to surprises later, and then slowly found that the surprises could not be overturned.
Because there are so many surprises, it almost becomes a shock.
“Furthermore, I think the shape of the camshaft can be appropriately changed. Through this shape change, the valve lift can be increased from 9.0mm to 9.5mm.”
“ Don’t underestimate this 0.5mm, it can increase the cylinder’s inflation rate a lot, thereby increasing the output power.”
Shunai had been worried about how to increase the engine power for a long time, but when it came to Jiang Hui. In my hands, various ideas popped up one after another.
Cheng Tao and Hu Shuiwen were stunned.
Their impression of Jiang Hui has undergone another subversive change.
If the admiration before was more polite, then now it is surrender from the heart.
There is no way, in the face of absolute technical strength, they cannot afford any resistance.
“Furthermore, we can also upgrade the connecting rod bush and crankshaft bush and replace their materials with composite metal materials...”
Although more than a dozen improvements have been proposed , but Jiang Hui seemed to have no intention of stopping.
All kinds of fantastic ideas are still being exported.
It’s time for a new round of recommended PK, please read~~
(End of this chapter)