Author | Lei Lei
Editor | Zhao Wenhua
According to the statistics of China Automobile Association, in 222, the production and sales of new energy vehicles in China were 7.58 million and 6.887 million respectively, up by 96.9% and 93.4% respectively, accounting for 6% of the global new energy sales. Among them, the sales volume of EV pure electric vehicles was 5.365 million, up 81.6% year-on-year, and the sales volume of PHEV plug-in hybrid vehicles was 1.518 million, up 1.5 times year-on-year.
from the above data, it can be seen that although EV has become the first main force of new energy, the rapid growth of PHEV cannot be ignored. It is worth mentioning that in the in-depth report of new energy in February 223, the PHEV models below 3, increased by 19.8% year-on-year, while the EV models below 3, increased by only 52.8% year-on-year.
there is no doubt that in order to gain a foothold in the new energy market with the largest base plate, it is necessary to launch PHEV models that can control the plate. Therefore, many brands released PHEV new product plans last year, including Dongfeng Nissan Qichen.
▲ Qichen V DD-i, which was unveiled at Guangzhou Auto Show last year
On March 27th, Dongfeng Nissan Qichen released its DD-I super hybrid technology for the first time. Please note that it put forward the concept of "super hybrid". How to understand it? What are the technical highlights of DD-i? This article will answer one by one from the following aspects.
DD-i super hybrid, what are the technical highlights?
before talking about DD-i, the author briefly talks about the current situation of domestic hybrid technology.
At present, the domestic hybrid is divided into three factions: First, the extended-range hybrid represented by LI. The characteristic of this system is that the main duty of the engine is to generate electricity, which is equivalent to the role of charging treasure, and it does not participate in direct-drive wheels.
secondly, the HEV hybrid represented by "Liangtian" does not need to be plugged in, and most of the early domestic hybrid models adopted this form. The advantage is that the fuel economy is good under comprehensive working conditions, but the disadvantage is that it can't be green.
thirdly, the single-gear plug-in hybrid system represented by BYD. Because the motor is the main driving force in most working conditions, this kind of hybrid fuel efficiency is high. The short board is that the engine power is small and the power is insufficient under extreme working conditions. Chery, Great Wall and Geely have launched multi-gear DHT in succession, which is to enable the engine to participate in power output as much as possible, while ensuring fuel economy and giving consideration to power.
qichen DD-i system equipped with single-gear DHT belongs to the third plug-in hybrid. Its hybrid mode can be summed up as follows: during daily driving, pure electricity is preferred below 6km/h, and the engine does not start at this time. In the case of power loss (less than 15%), the engine generates electricity to drive the wheels and replenish the battery, and the hybrid system enters the extended range mode. When the floor is oiled, the engine and motor are treated at the same time, and the power response is improved with the same output. When driving at high speed, the system enters the engine direct drive mode. At this time, the engine will not generate electricity for the generator, nor will it charge the battery. Instead, it will always maintain a relatively economical speed range, thus achieving the purpose of saving fuel. Of course, drivers don't need to switch, because DD-i simplifies the hybrid mode, and its hybrid mode can realize adaptive switching.
kinetic energy recovery is also an important link to improve fuel economy. The kinetic energy recovery strategy of Qichen DD-i is similar to that of BMW, that is, when the vehicle is taxiing or braking, the vehicle starts kinetic energy recovery, and it can adaptively adjust the kinetic energy recovery intensity by sensing the distance from the preceding vehicle and the driving state through the camera outside the vehicle. If the system determines that there is no car ahead, the taxi distance will be longer, and if there is a car ahead, the taxi distance will be shortened, which is simply the "fool" mode.
From the structural point of view, Qichen's DD-i ultra-hybrid technology is more inclined to the series mode: power is given priority, and the engine will only be directly driven under the conditions of power loss, rapid acceleration and high speed. Its structure is similar to the current mainstream hybrid scheme, so why can it mention the concept of "super hybrid"? This is the second topic I want to talk about.
as we all know, the single-gear series and parallel hybrid technology is characterized by large motor power, small engine output and small battery capacity. For example, BYD Song Pro has a motor power of 18kW, an engine of 1.5L, only 81kW, and a battery capacity of only 8.3kWh. This kind of motor is strong, the engine is weak, and the battery capacity is not large, which mainly depends on the motor output. Therefore, fuel saving is the advantage of DHT, but the disadvantage is also obvious, that is, the power is relatively poor under extreme working conditions such as high speed, high altitude and low temperature. The reason is that the motor cannot exert its maximum performance under the influence of the battery, and it relies more on the parallel drive of the internal combustion engine to provide power, but the overall power of the internal combustion engine is not high enough. The emergence of multi-gear DHT technology is to let the engine participate more in efficient power output and solve the disadvantages of insufficient power.
qichen's DD-i super hybrid adopts another solution. The system is equipped with a 1.5T engine with a maximum power of 12kW and a maximum torque of 23 N m. The official zero acceleration is within 7.9 seconds, and the overall performance is not lost to traditional fuel vehicles. In addition, this system will start the engine at low temperature, and heat the battery through the heat generated by the engine to ensure the normal operation of the hybrid system, which greatly improves the problems of limited engine power and insufficient single-gear series-parallel power caused by low temperature.
DD-i super hybrid, the first launch of Qichen big V
On the day of the release of DD-i super hybrid technology, Qichen also brought the first DD-I production car-Qichen big V DD-i, which was also the best-selling model before Qichen.
From the appearance, the biggest difference between Qichen V DD-i and the fuel version lies in the front face. The front face of DD-i version adopts a closed straight waterfall grille, which not only improves the recognition of the front face, but also reflects the identity of new energy. In addition, the style of LED daytime running light is different from that of fuel version, DD-i version is horizontal through style, and fuel version is flying wing style. Other aspects are not much different from fuel, the overall shape is still simple, and there is a sense of intimacy at home.
▲ The performance of Qichen Big V Fuel Edition
has changed quite obviously. With the blessing of DD-i super-hybrid, Qichen Big V DD-i has a fuel consumption of 4.3L per 1 kilometers, a comprehensive fuel consumption of .85L, a pure battery life of 11km and a comprehensive battery life of over 1km. No matter which aspect, it has reached the excellent level.
you may say that all the above data are given by the government, so you don't have to doubt it. Based on my understanding of Dongfeng Nissan, there will be no obvious deviation in the official announcement data. We will also test this car in the future to prove that we won't be mistaken.
Finally,
Anyone who knows the history of Qichen knows that this brand is very special. Although it is independent, it has a joint venture background, and its production and manufacturing are strictly in accordance with Nissan's standards, which is one of its advantages. With the rapid popularization of new energy sources, Dongfeng Nissan Qichen has also accelerated its transformation. At the Guangzhou Auto Show last year, it was clearly stated that it would no longer develop new fuel vehicles and turn to new energy sources in an all-round way. The release of DD-i super hybrid technology and the debut of Qichen V DD-i are the first steps for Qichen brand to turn to new energy.
Of course, the key to the success of Qichen V DD-i depends on the pricing. If it is placed at the level of 15,, its competitiveness is relatively strong. After all, besides DD-i technology, this car also has face value and smart blessing. Let's wait and see what the result will be. Copyright statement: The pictures/videos are exclusively original in foreign countries. Please don't reprint them without authorization
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