Arashi nodded: it seems that this is really the case, the diesel engine in the past was not covered with a mixture of black oil and dust, and as soon as you put the gas pedal, it was a puff of black smoke, just like the diesel engine used in the trucks and the tractors of the farmers and uncles in the countryside, and the loud movement could even make you hear it from two kilometers away - well, the bigger movement was actually caused by the collision of the truck's compartment, not the sound of the engine; It would be better if the power of the diesel engine on the tractor was proportional to the movement.

In particular, the diesel engine that is exposed outside all day long is even more dirty and unbearable, and this is the first impression left by the diesel engine: dirty, bulky, polluting, and extremely loud!

But the diesel engine used in passenger cars is not like this, more accurately said that the impression caused by the diesel engine is not the fault of the diesel engine itself, but the fault of the diesel engine designer: the diesel engine they designed is not exquisite enough, the internal structure is not precise enough, so it gives people the impression that the diesel engine is a big polluter. In fact, this is not the case at all, if you remove the three-way catalytic converter of the gasoline engine, and then open the hood of your engine that has not been touched much except for adding water to the engine for more than half a year, it is really not very clean, and the emission of pollutants is actually not very low.

Different from the gasoline engine, because the diesel engine is directly in the cylinder to forcibly compress the diesel oil mist combustion - a bit like deflagration - rather than the electric ignition combustion of the gasoline engine, so the working temperature of the diesel engine is higher, and the fuel combustion is naturally more sufficient, under the same level of manufacturing technology, the emissions of carbon monoxide, carbon dioxide, hydrocarbons and particles of the diesel engine are far lower than the emission pollution level of the gasoline engine, or whether it is the fuel-saving performance of the engine or the power performance, All are far more than gasoline engines of the same displacement.

Zhang Lan remembers one thing very clearly, at the beginning, uh, it should be said that it is the future, even in the future when the diesel engine for cars is already very good, but it is a pity that the manufacturer of high-performance diesel engines for passenger cars is not China, but Germany. The Germans have a talent that seems to be envied in this regard - regardless of the level of emissions, but the engine is strong has always been one of the hallmarks of the diesel engine - the vehicle management departments in many cities in China still restrict the licensing of cars with diesel engines, on the grounds that diesel engines are seriously polluted and pollute the atmosphere of the city, so they are not licensed.

When she saw the news at that time, Zhang Lan couldn't help but want to laugh: compared with the gasoline engine, under the premise of the same displacement, the power of the diesel engine for passenger cars is higher, but the fuel consumption is only about 60% of the gasoline engine, and the exhaust emissions are less than 70% of the gasoline engine!

And that's just ordinary passenger car diesel engines. That is, the diesel version of the Jetta, not the Bora that uses the TDI diesel engine that the Volkswagen Group is proud of! The guy who made this decision understands the working principle of these engines and knows which is more environmentally friendly, diesel engine or gasoline engine? Do these guys think that the diesel engine used in the car is the same as the diesel engine used in the tractor and the big truck, and when you step on the accelerator, there is a puff of black smoke?

"What's next?" Zhang Lan patted her forehead lightly, "And then what?" ”

"But then we found out that these shortcomings are not the shortcomings of the diesel engine itself, it is caused by the manufacturing precision and design of the diesel engine is not refined enough." Seeing that Zhang Lan was listening carefully, Xiao Chenxi continued, "With Volkswagen's TDI engine in front, we think we should reflect on our previous thinking? ”

"Well," Zhang Lan nodded and asked, "And then?" ”

The so-called TDI diesel engine, simply put, is a diesel engine developed by the Volkswagen Group that uses turbocharged intercooled and diesel direct injection technology to inject fuel directly into the main combustion chamber for combustion, instead of injecting diesel into the pre-combustion chamber like the usual diesel engines in the past.

The effect of the diesel engine designed by the Volkswagen Group in this way makes its TDD diesel engine have a strong power output, a larger torque output range, less soot emissions, less noise and better fuel economy compared with traditional diesel and gasoline engines.

Strictly speaking, although the Volkswagen Group named its diesel engine for passenger cars TDI, the so-called TDI engine of the Volkswagen Group is still named after the first letter of the three words turbo, diesel (Diesel and injection), but whether it is in terms of fuel economy or output power, it is not far from being able to compare with the TDI engines of the Volkswagen Group a few years later. It was established for the development of TDI diesel engines in the future of the Volkswagen Group

Good logo only.

The TDI engine that really made the Volkswagen Group's TDI diesel engine famous and established itself as a proud advantage in the field of TDI turbocharged diesel engines was the TDI diesel engine that was first applied to the fourth-generation Golf in 1998, that is, this year, which is known as the "small steel cannon".

Because the TDI diesel engine uses a number of advanced technologies of diesel engines developed by Volkswagen Group AG itself, such as a high-pressure fuel injection system and an adjustable vane turbocharger, the performance is very strong, both in terms of power output and torque output, it is stronger than gasoline engines of the same displacement, and in terms of emissions, it is far lower than gasoline engines of the same displacement.

The 1998 Volkswagen Group's proud TDDI diesel engine was introduced to China by FAW-Volkswagen in 20011, along with a regular version of the Golf GTI, instead of a high-performance version of the Golf GTI.

In addition to the hatchback version of the Golf, FAW-Volkswagen also added a tail to the iconic hatchback of the Golf and turned it into a sedan, and the name was changed from the Golf to another name, that is, the Bora, which was introduced by the one-year-old FAW-Volkswagen, boasted and coaxed, and was called the "driver's car".

Ahem, in fact, Bora can also be called a cross-generation upgrade version of Jetta. In the North American market, Bora is still known as Jetta, and later a batch of diesel Jetta is also sold in China. It is very helpless that the quality of China's diesel is too poor compared with the quality of diesel in Europe and North America, so that this too advanced diesel engine is still very unsuitable in China, and the oil circuit and fuel injector are blocked from time to time, because of the long-term use of inferior diesel - there is no good one, Sinopec and PetroChina's oil products are as bad as their character - the loss of the engine is more powerful than the gasoline engine of the same displacement, Good things have become such a thing when they arrive in China! ,

What's worse is that China's oil prices are still higher than those in Europe and the United States! In addition, you have to pay countless bridge tolls, tolls, and toll booths that you have to pay for crossing a small village.

"Then we simulated and calculated, and the results of the simulation surprised us," said this, Xiao Chenxi's face was also a little embarrassed, "If the design and manufacturing accuracy of the diesel engine reaches the level of design and manufacturing accuracy of the gasoline engine, under the same conditions, the combustion efficiency of the diesel engine is still higher than that of the gasoline engine." Under the same displacement, because of the working characteristics of the diesel engine itself, compared with the gasoline engine, its power, torque and combustion are more sufficient. It's just that our previous impression of the diesel engine made us ignore this. Since diesel engines have such a big advantage, why don't we make them? So a while ago when we were idle and bored in Vladivostok, Alice and I designed the TDII turbocharged direct-injection diesel engine you mentioned. ”

"Won't it?" Zhang Lan exclaimed, "You guys actually got the TDI diesel engine out so quickly?" ”

Zhang Lan remembers very well that in the next ten years, in Europe and the United States, the rapid development of diesel engine technology for passenger cars, thanks to the increasingly stringent environmental protection regulations in Europe, the technological development of diesel engines can almost be called a rapid progress, together with high performance, low fuel consumption and low emissions and is known as the "green engine".

By 2008, when Zhang Lan returned, in Europe, the number of diesel engines accounted for more than 40 percent of the total number of engines used in passenger car engines, and according to the survey results, the number of people who were ready to buy diesel engine passenger cars was nearly 60 percent. Even in the Volkswagen Group's passenger cars, one out of every two cars runs on a TDI diesel engine.

Of course, at that time, the TDI diesel engine used in passenger cars was far from the mechanical control method adopted by traditional diesel engines, and both the fuel injection time and the amount of fuel injection were accurately controlled by the on-board computer system - or can it also be called an electric injection diesel engine? -- The throttle response is light and powerful, the engine runs smoothly, and the fuel economy is excellent, and the comprehensive fuel consumption is even half of that of a gasoline engine with the same displacement!

Of course, all this has to do with the fact that the Volkswagen Group spares no effort to promote its TDII diesel engine in all the permissible events: such as the Dakar Rally, the 24~Hour of Le Mans in France, the German Touring Car Masters and all other well-known events - in all the events, the Volkswagen Group's cars with TDI diesel engines do not participate in F11 races.