2020 November 17, Dongfeng Motor Group under the high-end brand new energy vehicles Lan map technology open day was held in Wuhan, and announced in a large high-end smart electric SUV in December the world starter. Open Day was first exhibited in technology equipped with extended-range electric drive technology solutions, the first models will be equipped with double-wishbone front + rear multi-link independent suspension, air suspension and other configurations.
At the same time, also shows that the first car Lan FIG TRB + Patch A composite structure of a thermoformed column, and using Al-Si coating TRB thermoformable material in the B-pillar; first 2000MPa using Al-Si coating material kind BIW door beam.
As used herein will employ extended-drive vehicle platforms art solutions Lan FIG ESSA architecture, author Dunhuang “close” to the high temperature conditions in contact charge-discharge efficiency performance of comprehensive study and determination.
1, based on ESSA vehicle platforms using extended-range electric drive Lan map technology solutions SUV charge-discharge efficiency:
As the epidemic prevention policy, Dongfeng Group, a subsidiary high temperature conditions test fleet multiple brands coalition failed the first time to go up to 87 degrees Celsius surface temperature of Turpan. High temperature environmental testing in Dunhuang, the use of ESSA architecture Lan map extended-range version of the EV version for up to more than two months of full-term test. FIG Lan extended range version of each focus group driving motor 1 (Assembly) Assembly of + 1.5T engine maximum charging power is 60 kW and front and rear generators, charge and discharge efficiency at full power balance test and fed state.
54 degrees near the surface Dunhuang afternoon maximum temperature for 8 months, the author noted particularly in FIG feeding state Lan extended range version, for a different length of the driving speed 3 sets of the entire vehicle from the circulatory system with feed (line 1 set of engine cycles, a set of front and rear drive motor and the generator + electrical control system circulation line, a set of battery thermal management cycle line) temperatures are in default state (no high temperature)!
I note in particular, the test team engineer repeatedly to increase the use of this programLan FIG heavy camouflage vehicle electric drive technology solutions, the “driving” charge long distance low speed, is to have a high temperature environment of the inline four-cylinder 1.5T this coolant conduit Wendy heat is too high. 1.5T engine is in a high power output power to the generator to charge the battery power while still in a state similar to the full-time four-wheel drive power output.
2, the use of extended-range technology solutions Lan map ESSA vehicle platform technology explain:
Figure ESSA Lan architecture is a positive development modular architecture platform, chassis and bandwidth adjustment made by car different levels of the car to meet market demand.
The picture shows the rollout of Lan diagram in vehicle platform architecture ESSA physical state of the close-up range extender technology solutions + electric four-wheel drive system.
yellow arrow: 1.5T inline four-cylinder gasoline engine
The green arrow: before generator includes a control motor predriver and “3 in 1” high-voltage control system assembly
white arrows: maximum power 60 kW integrated generator and motor pre-driver (black arrow) assembly
red arrow: rear “3 in 1” level drive assembly
judged by many subsystems of the front portion of the power state of the art the details of the cabin for the Lan FIG large SUV vehicle platforms ESSA architecture uses a first idling state, a low power (fully charged) and high power (low battery) smooth operation and the power generation state NVH better 1.5T inline four-cylinder engine (inlet at a front end, an exhaust manifold + three-way catalyst located in a position facing the firewall segment 1).
Referring using PHEV art Touareg eHybrid, using techniques EV ES8 and Wei to use over an extended-ONE techniques, like almost 3000mm wheelbase includes four levels SUV driving ability, in view of the Lan wheelbase range of large SUV or weight in the range of 2.2-2.4 tons. Figure Lan chose 1.5T inline four-cylinder engine, integrated models targeted at the needs of high-end luxury line of power reserve, almost full-time four-wheel drive state traffic safety needs, but also take into account the long-distance power statusLow speed caused by hot and cold exchange traffic safety hazards caused by balance.
As the chart Lan officials did not release information about this 1.5T inline four-cylinder engine and generator, but it provides the official described as follows: “more power output and more stable operation, and efficient matching of a rated power 60kW permanent magnet synchronous generator, higher power generation efficiency, bringing lower energy consumption compared to similar extended-range models, can still maintain a good momentum when Lan map extended-range electric vehicle low battery output;. expedited even after multiple cycles of acute Save, temperature and electric drive system, however, is not limited to twist, stable in pure electric vehicle starts, the initial state is very smooth, relatively linear power output required when accelerating or overtaking, the throttle in the end , strong involvement of engine, drive motor directly to the power supply, accelerate the reaction capability. “
Clearly, in order to deal with the large SUV nearly 3000mm wheelbase, four-wheel drive bigger load brought by Lan Pictured ESSA architecture 1 station platform specially prepared for the extended-technical characteristics of 1.5T inline four-cylinder engine to meet the stringent charge-discharge efficiency equalization settings, and the use of performance far exceeds that of ordinary inline three-cylinder 1.2T engine that sets the ideal ONE equipped.
Of course, speaking at the publication date of this technical chart CEO and CTO Lu Lan release said, “In order to select the 1.5T engine more accessible to authorized users.” I’m afraid this is also considered, and the current price of 300,000 yuan by the same extended-range technology plan was equipped with an ideal ONE 1.2T inline three-cylinder engine, is almost the same price many fit 4-cylinder or six-cylinder engine model owners playful attitude right.
on the 
FIG ESSA graph Lan platform integration architecture model close-up front suspension state of the art (all-aluminum double-wishbone front suspension + air).
The red arrow: A-type arm aluminum material
The green arrow: the aluminum material A-type arm
white arrows: aluminum material before the knuckle
[ 123] yellow arrow: the engine, the generator and the drive motor before the aluminum material before fully support sub-frame
blue arrow: before the front drive axle (front drive motor to the knuckle)
FIG ESSA Lan vehicle platform architecture integrated post “3 in 1” by the electric drive system mounting assembly 3 group, “soft” connection to a group of full aluminum material frame-shaped sub-frame (multi-link rear suspension, and the air is also fixed thereto).
Red Arrow: “3 in 1” level of the drive assembly motor control system
yellow arrow: “3 in 1” level of drive assembly drive motor
green arrow: “3 in 1” level of the reduction gear drive assembly
blue arrow: aluminum material frame-shaped sub-frame
white arrows: fixed “3 in 1” total electric drive Mounting assembly into a small (group of 3)
the figure Lan FIG ESSA vehicle platform integrated state close-up multi-link rear suspension (after aluminum material + air suspension)).
green arrow: control arm aluminum material
white arrow: swing arm aluminum material
blue arrow: the aluminum material of the knuckle
red arrow : air damper assembly
yellow arrow: drive axle (rear “3 in 1” level after the drive assembly to the knuckle)
technology conference demonstrated that the use of extended-drive vehicle platform in-kind technical solutions, and therefore a smaller mid-size battery power, load power is also not disclosed. However, it may be determined by the state of the battery module shown, or based on a density of a square traction from three yuan lithium battery module.
is located in front end interface battery state close-up details of the welding body.
The green arrow: low or high-temperature heat for the preheated line interfaces
The red area is battery powered internal batteries: reserved considerable space, so that the loading amount greater facelift power cell assembly
FIG Lan ESSA vehicle platform is compatible with the extended-range drive full electric drive (EV) two kinds of technical solutions. By Lan map OfficerThe propaganda film released can be seen, using the extension technology platform, the front generator and the front drive motor in one assembly; use the full-electric drive technology platform to remove the 1.5T engine and front generator. Of course, in a full-electric drive technology solution, there is a power battery assembly that is more than more reprinting power.
Red Arrow: The 1.5T engine in the incremental power assembly
Yellow arrow: two technical platform front drive motor
White arrow: two technical platforms are complete General rear “3-in-1” electric drive assembly
The author has to say:
The first time, the mashier reunion-driven technology verification vehicle was first demonstrated, which proved that the army is mainly The extension of the application scenario is at least 3-4 years or more in the Dongfeng R & D system. 2020 debut, and the east wind is the east wind system, the saga. SUV has undoubtedly has a longer reliability verification cycle.
In any case, the strategy of the increased range technology solution of the 图 is very clear, select the high-efficiency dedicated straight four-cylinder 1.5T engine to provide sufficient power to the front and rear drive motors The power battery is used as an energy storage system for paving the road conditions, and the passive support of the full-legacy four-wheel drive system in complex road conditions is provided. 
In the ESS ESSA architecture platform, there are simultaneous extension drivers and full-electric drives, and two driver technology solutions. This approach to the largest way to ensure that different drive type models have a very similar driving experience. To meet the different users of different travel needs, under the ESSA architecture platform, the application of the extension technology model is longer, the market is clearer; the market is more clear, and the demand for urban or intercity travel is used. The 1.5T engine and generators saved self-weight are filled with more battery power. Modular and universal technology settings make the 图 图 图 图 应
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