Set sail1992

Chapter 853 There is not much time left for Huateng Industrial Group
After hanging up the phone, Zhang Qihang began to think about a question: When did Huaxia start to force the promotion of the engine EFI system on passenger cars?

This problem is not complicated. All the first batch of National-I emission vehicles are equipped with engine EFI systems. That is to say, if you want to know when the National-I emission standards began to be promoted, you will know that the country is mandatory to equip engines with EFI. system time.

For someone like Zhang Qihang who has worked in the automobile industry for most of his life, this point in time is still very clear.

In the second half of 2001.

To be precise, it was July 2001, 7.

In the autumn of 1998, consecutive days of air pollution brought Beijing’s air quality index to its peak: on average, 3 out of 2 days were polluted or severely polluted!
At that time, the blue sky could no longer be seen in the capital, people had to wear masks when traveling, and various respiratory diseases occurred frequently.
How serious is it?

It was so serious that every night, the street was filled with a layer of fog that made it impossible to see people more than a hundred meters away, and this layer of mist even choked the throat.

After testing by the environmental department, the culprit of this serious air pollution is not only burning coal, but also vehicle exhaust. The exhaust gas emitted by vehicles contains a large amount of carbon monoxide, hydrocarbons and nitrogen oxides. The number of cars in Beijing is as high as Millions of cars, these millions of cars emit a large amount of harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides. It has reached the point where people's health will be seriously damaged if they are not treated, and urban buildings will be corroded if they are not treated. .

Well, the reason is found, so the next question is: what to do?
Common people burn coal for heating and cooking. It’s easy to say, cooking?Natural gas directly enters households, and households that do not have the conditions for natural gas to enter their households are forced to promote and use gas; heating can be said to use central heating in winter, and then install environmental protection equipment in thermal power plants, but what about the problem of vehicle exhaust emissions?
At this time, some experts in the automotive industry gave the answer: use EFI!
Experts then explained: The core reason why the engine EFI system can effectively reduce the air pollution caused by exhaust emissions is to replace the traditional mechanical control (that is, carburetor) with more advanced microcomputer control technology. The technology can enable the engine to obtain the best air-fuel ratio and the best ignition timing when it is running in various working conditions, thereby improving the power and economy of the engine and greatly reducing vehicle exhaust emissions.

According to foreign practice, the engine adopts electronic fuel injection plus oxygen sensor closed-loop control and three-way catalytic converter is the best existing technology to reduce gasoline engine exhaust emissions, which can make the three kinds of carbon monoxide, hydrocarbons and nitrogen oxides Harmful substances emitted by vehicles are reduced by more than 95%.

It is precisely because the engine electronic fuel injection system has such a remarkable effect in reducing environmental pollution that it was quickly promoted by the governments of European and American countries. The extent to which a car without an EFI system cannot be sold in the market.

When the Beijing government heard about it, is there such a good thing?
Nothing to say, verify immediately!

Huaxia imports so many cars from Europe and the United States every year. Most of the mid-to-high-end models are equipped with EFI systems. Randomly select a batch of models with EFI systems and domestic carburetor models for exhaust emission. Compare and verify, and see how big the gap is in terms of pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides between models equipped with EFI systems and models equipped with other systems!
The results of comparison and verification are astonishing. These models imported from Europe, America and Japan, equipped with EFI systems, and meeting the emission regulations of Europe, America and Japan, have only domestically produced vehicles in terms of the emission indicators of the three core pollutants of carbon monoxide, hydrocarbons and nitrogen oxides. Less than 3% of carburetor models!

With such obvious contrasting results, what else is there to say?

Under such circumstances, the Beijing government made a decisive blow: it resolutely decided to start implementing local regulations to prevent air pollution, and to strictly manage vehicle exhaust emissions: starting from January 1999, 1, all cars sold in Beijing must be equipped with engine batteries. Injection system, all cars that are not equipped with engine electric injection system are not allowed to be sold in the capital area; the cars that have been sold will be treated with exhaust emission control equipment, and cars with excessive emissions will not be allowed to drive on the road!
As Beijing took the lead in mandating the installation of EFI systems for automobiles, major cities and provinces across the country also followed suit. The final result was that the country compulsorily promoted the national first emission standards at the time of July 2001, 7.

Straightening out the whole story behind the emission of Guoyi, Zhang Qihang frowned: Sylphy still uses carburetors now, if the engine can't be electronically injected before New Year's Day, those competitors will give up such a good engine. A chance to hit Huateng Automobile?
This is just a Sylphy sedan, and "Fengya·Teana" has a deeper meaning to Huateng Industrial Group. Thinking that "Fengya·Teana" was originally planned to be launched at the beginning of next year, but if at this time "Fengya·Teana" is The Beijing side immediately called a stop and forbid the sale in the capital, that would be a lot of fun...

Counting the time again, Zhang Qihang took a deep breath, and couldn't help but think of the very famous words in football: There are not many opportunities left for Huateng Industrial Group!
Is time really running out?

Not necessarily!

For other manufacturers, time may be running out, but for Zhang Qihang, who was once a partner of Liszt and has already been familiar with the overall structural design, control technology and system calibration logic of the engine EFI system, Not to mention just doing the calibration and adaptation of the EFI engine, even if it is to develop an EFI system from scratch, there is no difficulty at all. In this area, Zhang Qihang is the real No. 1 top expert in China!
But the problem is, in this process, no suspicion will be aroused, and the prerequisite for not arousing suspicion is that you must figure out the overall level of domestic engine EFI technology...

………………

Zhang Qihang, who was carrying pastries and fruits, saw Professor Xu Qingwu leading a group of seniors discussing something enthusiastically, and asked with a smile, "Teacher, fellow seniors, what are you busy with?"

Seeing Zhang Qihang, Professor Xu Qingwu was also very happy, and said with a smile: "Xiao Zhang, you are a busy person, why do you have time to come to us today?"

"I'm here to see everyone..." Zhang Qihang casually glanced at the data and charts on the computer while talking, and said in surprise, "Huh? Teacher, are you studying EFI?"

Seeing the data and graphs on the monitor, Zhang Qihang was secretly delighted: I was still thinking about how to open this mouth just now, but I didn't expect the opportunity to come.

Zhang Qihang was only secretly happy, but Professor Xu Qingwu was shocked. He looked at the monitor, then turned his head to look at the picture of Qihang, and said in disbelief: "Can you understand these data?"

"What can't you understand?" Zhang Qihang said casually, "Teacher, have you forgotten? I told you before, when we bought Mazda's 929 technology, I stayed there for a long time..."

Professor Xu Qingwu was even more shocked: "You told me that's true, but in such a short period of time, you will be able to calibrate the EFI engine? Hmm... Is Mazda having a brain twitch? Show you all the core technologies?"

"The EFI calibration of the engine is just the core technology?" Zhang Qihang curled his lips disapprovingly: "Mazda's real core technology is engine research and development and chassis development, and engine calibration is only the most shallow technology. The matter is something that can be understood at a glance and draw inferences from one instance... Teacher, what expression do you have?"

"You can understand it at a glance? Infer other things from one instance?"

The expression on Professor Xu Qingwu's face was very strange, like crying but not crying, half smiling and not smiling: "Let me ask you, when the throttle valve is fully closed, there is a start signal, the speed and engine temperature are below a certain value, and the system is in a cold start condition, What is the corresponding processing principle of the EFI system?"

Zhang Qihang said without hesitation: "The basic control principle is: the fuel injection volume decreases with the increase of the speed after starting, and the ignition advance angle increases with the increase of temperature; after a cold start, the speed is between the starting speed and the idle speed. During this period, the coolant temperature is lower than the normal temperature, and the system is in the warm-up condition after starting.

The overall processing principle is: the fuel injection quantity is enriched according to the engine temperature by means of the warm-up coefficient related to the speed and load, and the ignition advance angle is moved forward with reference to the temperature.

With the change of the throttle opening, the system judges the change of the engine load according to the established logic. When the vehicle is in the acceleration condition, the fuel injection quantity is accelerated and enriched for the purpose of outputting the maximum torque, and the fuel injection quantity is decelerated when decelerating. For the treatment of fuel reduction, the ignition advance angle changes accordingly to avoid knocking when the load changes; during normal driving, the system sets the fuel injection amount under economical and low pollution according to the theoretical air-fuel ratio and the feedback from the oxygen sensor, and the ignition advance angle is based on Change the coolant temperature accordingly;
When the throttle valve is closed and the engine speed is close to the set value of the idle speed, the system judges that it is in the idle speed condition. At this time, not only the idle richness, but also the adjustment of the idle speed bypass valve, the drive motor reaches the corresponding opening degree, and the ignition The advance angle is optimized for fuel efficiency and emissions requirements..."

Speaking of this, Zhang Qihang looked at Xu Qingwu: "Teacher, do you think there is any problem with the overall logic?"

"No problem! No problem!" Professor Xu Qingwu, who originally wanted to test his students, blushed with joy when he heard Zhang Qihang's words. He patted Zhang Qihang's shoulder excitedly, The face is full of happiness: "Good guy! I really didn't expect you to have such a hand... By the way, you kid has always been in the Three Treasures Hall for nothing. Tell me, what's going on?"

Speaking of the latter, Professor Xu Qingwu's expression became serious.

(End of this chapter)