After these changes, the Q5 greatly improved its off-road performance with only a small increase in cost. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

And this time, the third protagonist Land Cruiser, which is intensively listed, has also ushered in some minor adjustments to it.

What Li Fanyu redeemed in the system model database was the latest model of 16 in the time and space before the historical process changed.

According to the rabbit data package, the engine of this model is a 4.0-liter naturally aspirated engine codenamed 1GR and a 2TR 2.7-liter naturally aspirated engine, and a 3.0-liter diesel engine codenamed D4D.

According to popular saying, the model names of Prado 2700, 4000, and 3000 are based on this engine displacement.

These three engines, to be honest, are very good in performance.

In the case of ensuring the stability of the engine, it also takes into account a certain degree of performance. The Japanese developed the concept of off-road vehicles, first of all, stability, and secondly, the pursuit of performance.

Therefore, the two gasoline engines that came out relatively early sacrificed a certain performance part in order to ensure stability. In terms of power performance, it is not an exaggeration to call it decent.

In other words, these R&D teams of Zhengxin have a strong R&D style. In order to make great progress in Zhengxin's technical reserves and design capabilities, Li Fanyu will not require each R&D team to strictly follow the data packages and drawings he gives every time Zhengxin develops, but leaves them a lot of room to play.

It is this relaxed R&D environment that makes each model of Zhengxin have more or less changes than the initial design.

With the gradual increase of Zhengxin's technical reserves, the R&D team is becoming more and more mature. These changes are also getting bigger and bigger, and they are marked with a lot of personal style depending on the R&D style and personality of the team leader.

For example, Liu Qing, who is very radical in personality and style.

In the process of starting the development of the Land Cruiser, it was believed that the performance of the two gasoline engines was really average, and a new power system was specially designed, and a separate production line was required from the power company during the production process. It has a relatively large impact on the cost of the whole vehicle and the time it goes off the assembly line.

So, this guy and the team engineers and the power company simply changed the engine part.

In the gasoline-powered version, the latest V6 engine on the low-spec version of the F150 is implanted. This new V6 engine was actually built by Courbo Jr. on the V8. A layout made in order to further lower the price threshold of the F150.

Although this V6 engine is a transverse platform, it is difficult for Liu Qing. With the team, the transverse platform engine was straightened and the modified V6 engine was mounted on the Land Cruiser's longitudinal platform.

Because according to Li Fanyu's requirements, the Land Cruiser must have two gasoline-powered versions to maintain sales, and one diesel-powered version as a strategic layout.

Therefore, Liu Qing made two more adjustments to the V6 engine and subdivided it into high and low performance versions.

But the D4D3.0T turbocharged diesel engine he didn't dare to move.

In this development, the TDI engine is available in both high and low power versions, and is dominated by the diesel versions of the Tiguan and Q5. But in the face of a pure off-road vehicle like the Land Cruiser, the power of this engine is still a little insufficient.

It's not that he doesn't want to move, because the Land Cruiser has little to do with Masatosin's existing car lineup. Although it has the same platform technology as the fighter, it is a pickup truck and an off-road vehicle, and there are still many differences in all aspects of the structure. In such a situation, there is a lot of pressure on Liu Qing.

However, after starting research and development, Liu Qing suggested that Li Fanyu not use the three engines on the design drawings, but rely on the implantation of new engines existing in Zhengxin's product line. But I received a clear instruction from Li Fanyu - the gasoline version can be changed, and the diesel version can be changed.

……

Liu Qing didn't know that in the time and space before the historical process of automobiles changed, the D4D diesel engine was also a new initiative of Toyota. It is a top-level off-road heart specially developed by this world-class car company for its off-road models.

In fact, the D4D is not the real name of this engine, it should be 1VD-FTV according to the naming method of Toyota.

But Li Fanyu feels that the D4D can better highlight the special properties of this engine.

Because the full name of D4D is DirectInjection4StrokeDieselEngine, that is, high-pressure common rail direct injection four-stroke engine.

And according to this name, you can see the technical characteristics of this engine.

The principle of high-pressure common rail direct injection, to put it bluntly, is a bit similar to the multi-point direct injection of automobiles. It is to install four fuel injectors on a common rail corresponding to four cylinders, and then through an oil pump to the common rail ** oil. The opening and closing of the injector is controlled by a computer, which uses a closed-loop system composed of a high-pressure oil pump, a pressure sensor and an ECU to completely separate the injection pressure generation and injection process.

Because the high-pressure oil pump transports the high-pressure fuel to the public fuel supply pipe, and realizes precise control of the oil pressure in the public oil supply pipe, the diesel engine fuel supply pressure changes with the engine speed, so it also reduces the defects of large noise and large flutter of the traditional diesel engine.

On top of this, the D4D engine is equipped with a highly accurate electromagnetic injection valve and an electronic oil pump that is different from the mechanical oil pump of a conventional diesel engine. The combination of these two good friends is combined with the precise control of the oil supply and the fuel injection pressure under the high pressure generated by the upper electronic pump. Combined with the powerful vortex generated by the concave bowl injector inside the engine, the mist diesel can be fully mixed with air, reducing the probability of deflagration and enhancing the combustion ratio in the cylinder.

It is the adoption of this integrated technology that radically and significantly reduces the vibration and noise of diesel engines. As a result, the D4D can save up to 30% of fuel compared to gasoline engines of the same displacement, but the noise and vibration are not much different from the level of gasoline engines.

It can be said that this engine is an important hole card for Toyota to enter the luxury off-road vehicle.

Li Fanyu knows that this is a good thing, this D4D series engine was installed in Toyota's three high-end off-road models in the time and space before the history of the car has not changed. Prado, Land Cruiser LC and Lexus LX can all see this big guy.

And since he wants to make an off-road vehicle, then this off-road heart, of course, Li Fanyu can't let go!

This is the main part of the engine.

In terms of gearbox, the manual automatic transmission originally used by Prado is an old-fashioned style, but it is stable and anti-rough.

In order to ensure the stability and off-road performance of the vehicle, Liu Qing was too lazy to change. After all, the Land Cruiser is to be filled into the Volkswagen brand to supplement the product line, and Volkswagen's positioning is there. It's not impossible to equip this car with an 8AT shift, but something too high-end will inevitably drive up the cost.

That can't be done, so it's used.

And in terms of off-road configuration, the configuration of the Land Cruiser is definitely a killer type;

Needless to say, the high-strength non-load-bearing off-road chassis that is in the same vein as the fighter is a continuation of the platform. In the differential lock, the superiority of the Land Cruiser compared to the SUV model is reflected.

Since the Q5 is an SUV, the differential lock can be used with a low-cost tooth-embedded differential lock. Because after all, the main battlefield of SUVs is still the city, and off-road performance must be there, but it is not special.

But the Land Cruiser is different, it's a model designed for off-roading.

This can't be used and has to be manually switched between the tooth inlay, but there is a suspicion of chaos. Therefore, on the Land Cruiser, it is equipped with a relatively complex Torsen self-locking differential that can maximize the passability of the vehicle.

This thing, in fact, uses five sets of worm gears and worms to integrate the differential and differential lock. Using the irreversibility principle of worm gear transmission and tooth surface friction, the differential is automatically locked or released according to the magnitude of the internal friction torque.

This is fully automatic, which can be automatically adjusted according to the rotation of the half shaft, and the passing capacity can be improved in all directions.

In addition, it is also equipped with a low-speed four-wheel drive function, that is, the afterburner box can be used to amplify the torque by nearly three times when running bad roads at low speeds, and improve the ability to climb or get out of trouble without damaging the gearbox.

In a word, almost all configurations on the Land Cruiser are prepared for off-roading. All kinds of configurations are added together, and it also creates such a domineering off-road vehicle.

The completion of the research and development of the Land Cruiser also completely announced the end of this round of research and development work.

After months of arduous research and development, the Tiguan, Q5, and Land Cruiser, three models with different or even very different performance, have finally passed through the incubation stage and entered the launch link!