The third wave of official revelations of the ideal L9 arrived as scheduled today, and the content of this revelation includes three parts: self-developed power system, new chassis and self-developed controller.
Compared with the previous controversial appearance, the three major links announced today are more uniform in the group. It can be seen that L9 on these links basically meets everyone's expectations.
Next, we will further interpret the official information.
01
More power, less energy consumption
In August last year, Ideal Auto and Xinchen Power established "Sichuan Ideal Xinchen Technology Co., Ltd.", with Ideal accounting for 51% of the shares, and official information shows that the joint venture company will develop a new generation of range extenders for ideal full-size models.
About the company of Xinchen Power, here is also a brief introduction for netizens who do not understand, its parent company is jointly controlled by Brilliance Automobile and Wuliangye Group, and the past corporate users of Xinchen Power include: BMW Group, Brilliance Group, Dongfeng Motor, Zhengzhou Nissan, FAW Jilin, Changfeng Cheetah, Geely Automobile, Jinlong Automobile, etc.
The joint venture's newly developed cylinder range extender also appeared in the L9 power information officially announced by the ideal today, and the new range extender has a maximum thermal efficiency of 40.5%, which is a significant improvement over the Dongan 1.2T three-cylinder range extender on the ideal ONE. In addition, from the figure, it can be seen that the range extender of the L9 is a four-cylinder, and the low-speed jitter of the range extender will theoretically have better performance after the new car has an additional cylinder.
The range extender only manages to generate electricity, and the power depends on the motor. The L9 uses a four-drive force system composed of two permanent magnet motors in the front and rear, and the maximum output power of the system is 330 kW about 449 horsepower, corresponding to zero hundred acceleration of 5.3 seconds, which is a good level in the full-size SUV.
However, one of the most noteworthy data in the whole map is fuel consumption, the ideal L9 has a fuel consumption of 5.9 L per 100 kilometers in fuel mode. Some in-depth developments can be made about this data.
How does the 5.9 fuel consumption come from?
The reason why we focus on this fuel consumption is because the ideal L9 is larger and more powerful than the ideal ONE, and it is reasonable to say that the energy consumption should be increased, but the L9 energy consumption is lower, which is a seemingly counterintuitive thing.
However, since such an effect has been achieved, it can be reversed, and the ideal L9 must have been optimized in several major links that affect the energy consumption of the extended range vehicle. Next, we can combine a few pieces of information to systematically say some of our views.
External factors, resistance optimization
Starting from the resistance part, the three points that should be paid attention to are wind resistance, tires, and vehicle weight.
First of all, the wind resistance, this L9 adopts a closed front face that is more inclined to the electric vehicle, and the heat dissipation and intake are all placed in the lower part of the front face of the vehicle, and is equipped with a variable intake grille. The second small detail is that the ideal L9 adopts a hidden door handle design, and the third detail is that the L9's wheel hub design this time is also a closed low wind resistance design. Although the specific effect of these details is still unknown, it can be felt from the above details that the design of the L9 is obviously considering to reduce wind resistance.
The second point is the tire, the ideal L9 The tire size used on the official appearance of the leak map is 265/45 R21, which is wider and larger than the tires of the ideal ONE, which is not conducive to reducing energy consumption. However, according to the previous cooperation of ideal Michelin, the L9 is likely to use low rolling resistance tires with custom configuration formulations.
The third point is the weight of the car, the larger the car, the heavier it is is common sense in everyone's cognition, and the L9, which is larger than the ideal ONE, is also a loss in this regard. But this time the ideal should also do a lot of homework in lightweight, Li Xiang himself also said that the L9 body uses a lot of aluminum, and the official chassis map can also see the aluminum alloy full-frame subframe.
The three points mentioned here are how to reduce the negative energy consumption impact caused by the increase in size in the resistance part of L9, and the main role of optimization and improvement of this part is to "reduce the magnitude of energy consumption increase", so the key to the performance of this energy consumption progress should lie in the "internal cause" of the energy consumption link - the power system.
Intrinsic factors, energy efficiency improvement
The power system affects the energy consumption of the same three points, the range extender, the three electricity, and the range extender system control strategy.
Range extender part, as mentioned earlier, the full range device used this time has higher thermal efficiency, which is the best point to understand, we will not expand too much.
At the three-power stage, the dual motor power on the L9 was increased from the current ideal ONE's 245 kW to 330 kW. It is reported that the L9 electric drive system comes from the joint venture company of Ideal and Huichuan, which improves the energy efficiency and integration of the electric drive system while increasing the power, and the volume is smaller and the power consumption is lower.
L9 operating energy consumption implied in the official diagram
In the garage L9 interest group ideal official personnel said that the L9 equipped with this electric drive system in pure electric mode power consumption may even be better than the current ideal ONE.
With a small expanded 44.5 kWh battery, the L9's CLTC pure battery life is 215 km, and the official revealed that the actual pure electric endurance will be slightly improved compared to the ideal ONE.
Then there's the most special improvement of the ideal L9 extended-range system– the extended-range control strategy.
In the development of the ideal ONE, the ideal range extender system development team accumulated a lot of valuable experience, while also making some industry-leading exploratory attempts.
One of the accumulations is fine control. For a certain power demand of the motor at the driving end of the vehicle, whether the power generation power of the range extender is higher than the demand, the energy overflows into the battery, or the power generation is less than the energy borrowed from the battery, there will be a problem: the energy from the battery is advanced and backward compared to the direct loss from the range extender to the motor.
Therefore, in the development process of the extended range system, one of the keys to improving energy efficiency is to match the power generated by the range extender with the driving power required by the vehicle as much as possible.
For example, in the early development process, if the drive-side motor needed 50 kW of power, the engineer would calculate the power that the extender would need to give based on the simulated loss rate data, and the possible data would be 60 kW.
However, in real-world scenarios, the power loss rate deviates from the simulation, and then sometimes the power generation and the drive end of the power generation are not matched well, either more power generation or insufficient power generation, which reduces the energy efficiency of the system. Based on the large amount of real data collected, the ideal has specially analyzed and verified the optimal control strategy under different working conditions, and obtained a better control strategy, which can realize more accurate range extension system control and reduce the "secondary transmission" of energy.
In addition, Ideal has also developed model-based predictive control, which will have more software and algorithm capabilities in this system, and there are higher requirements for the computing performance of the vehicle itself. One of the simple examples is that the noise reduction microphone outside the vehicle will monitor the noise indicators of the surrounding environment in real time, and when the noise of the external environment is large, it will allow the vehicle range extender to work at a higher power without affecting the vehicle's comprehensive NVH, so as to make the power preservation experience in some scenarios better and the energy efficiency higher.
Therefore, all the external factors mentioned above plus internal factors, including the comprehensive effect of vehicle lightweight, aerodynamics, mechanical energy efficiency of the power system, range increase control strategy, etc., the ideal L9 will achieve better energy efficiency performance than the ideal ONE under the premise of larger size, larger battery and stronger power, including fuel consumption and power consumption.
02
Chassis upgrade & XCU
Poor chassis texture should be regarded as one of the concentrated spit points of the ideal ONE owners, the original ideal ONE uses the front McPherson rear multi-link suspension, the filter performance is more general, too large aftershocks more.
The chassis of the Ideal L9 has undergone a major upgrade in this regard, using a front double wishbone and a rear five-link structure, and also equipped with air springs and CDC shock absorption system.
Suspension is no longer a short board
According to the previous information, the supplier of the air spring this time is Wybucks, the supplier of cdc shock absorption system is ZF, ideally on this basis of the self-developed suspension control system, this system in addition to the speed, terrain and driving mode of the car height and vibration damping adjustment, the common loading mode on large SUVs (lowering the body to facilitate the removal of luggage), the comfortable entry and exit of the linkage air suspension will also appear on the L9.
However, according to our previous experience of using a full-size SUV, the air suspension is usually inflated and deflated slowly, and the experience of these two functions is not good in a hurry, and I hope that the L9 can be improved.
Chassis part of the configuration and function has these, but from the ideal official release of the picture can be noted on another point is the integration of the system, after the use of four-cylinder range extender and double wishbone suspension, the L9 front cabin lateral space also needs to be arranged blue frame part of the dual motor drive system, for the front cabin lateral space layout has a certain test.
Under such an arrangement, the blue-frame dual motor system adopts a parallel shaft mechanism, which is arranged "one before and one after", and the space occupation is mainly before the heel point of the front axle of the vehicle, and it is expected that this layout will allow the L9 to obtain more occupant space inside the vehicle.
Self-developed controller XCU
The last information point is the new self-developed domain controller, for the specific information of this controller can see our colleague @ Liu Guangzhen in the community post.
To put it simply, the new controller from the hardware to the system to the software is developed by the ideal car, the computing performance has been greatly improved compared with the previous one, and it will provide higher support for OTA performance, car control and other aspects.
03
Write at the end