With the continuous upgrading of consumption and the rise of high-end new energy brands, Traditional Chinese car companies are facing the challenge of high-end brands, and gradually recognize the fact that low-end brands will be phased out of the market. Just yesterday (January 14), Weipai Mocha DHT-PHEV opened pre-sale, with a pre-price of nearly 300,000 yuan, taking the lead in making the price in the "brand up" plan go to the high end.
However, high-end price does not mean high-end brand, and the most competitive product may be the best way to gain brand status and market discourse. Next, we will interpret weipai's set of DHT-PHEV plug-in hybrid system to see if it can achieve high-end product iteration through technology, so that users can spend 300,000 to cross the hurdle in their hearts!
01
Pure electric range of more than 200 km longer than MINIEV
Looking back on the past year, under the national double carbon target, the traditional OEMs have also continued to carry out technological revolution to the new four modernizations, and the traditional independent brands have gradually figured out the technical route of "hybridization". Great Wall Motor launched the lemon hybrid DHT architecture, in which the hybrid special technology has a set of DHT highly integrated oil-electric hybrid system, two power architectures, and three sets of powertrains.
Weipai Mocha DHT-PHEV uses a 1.5T high thermal efficiency engine + 130kW high integrated DHT transmission + 39.67kWh capacity battery pack powertrain, compared to the latte DHT model The biggest difference is that the capacity of the battery pack is upgraded from 1.8kWh to 39.67kWh to increase the working conditions of pure electric driving and reduce the dependence on the engine, and provides a maximum power of 135kW P4 rear axle motor optional, to meet the user's demand for four-wheel drive models.
Among them, the 1.5T hybrid special engine can output a maximum power of 115 kW and a peak torque of 235 N·m. The engine adopts the integrated exhaust manifold of the cylinder head, 350bar overhead direct injection, high-temperature VGT supercharger, deep Miller cycle and other technologies, and the thermal efficiency has reached 38%, compared with BYD's 43.04% and Geely's 43.32%, there is still a certain gap.
Next to the DHT hybrid special transmission, the transmission has two different gear ratios of economy gear and power gear, and is divided into DHT100 and DHT130 through the different power of the P2 motor, while the Weipai Mocha DHT-PHEV model uses the DHT130 transmission, of which the maximum power of the GM motor (generator) is 81kW, the peak torque is 120N·m; the maximum power of the TM motor (drive motor) is 130kW, and the peak torque is 300N·m.
The gearbox mainly makes up for the lack of power of the single-speed parallel hybrid architecture at high speed, compared with the series extender hybrid architecture, it has better power and fuel economy in the high-speed overtaking scenario, the reason is that when the engine is working in the best fuel economy range, the direct drive due to the short transmission path of the power, bringing better fuel consumption performance.
However, the tandem has advantages in terms of efficiency compared with parallel connection at lower loads, which can achieve speed decoupling, the engine works in the optimal efficiency area, and the DHT system also has a tandem working state in hybrid mode, but at medium and high loads, there is one more choice.
Mocha DHT-PHEV as the first plug-in hybrid model of Wei brand, the biggest change is the capacity of the battery, HEV's battery capacity is 1.8kWh, and PHEV's battery is increased to 39.67kWh, of which the smart version (two-wheel drive) model in the WLTC under the pure electric mileage reached 204km, 100 km of power loss fuel consumption as low as 5.55L.
At present, the pure electric endurance of the mainstream plug-in and hybrid models is within 120km, and the pure electric mileage of the ideal ONE under the WLTC working conditions is only 155km, which maximizes the advantages of pure electric driving.
In addition, in order to ensure the best battery performance in the low temperature environment, the car is also equipped with an intelligent thermal management system to prevent the battery temperature from being too low to lead to the reduction of the mileage, and the battery preheating function and the function of inserting the gun to charge the heat preservation to ensure that the battery is at the best working temperature, after all, it can not have the advantages of pure electric vehicles, and the deficiencies are inevitable.
In terms of charging, the car also supports 6.6kW AC slow charge and 60kW DC fast charge function, of which the fast charge function is rarely seen in the plug-in hybrid model, when the battery capacity continues to increase, the user's requirements for charging rate will often increase, and this is often easy to ignore in the plug-in hybrid model.
In addition to the Smart Edition (two-wheel drive) model, the Mocha DHT-PHEV also provides a P4 motor located on the rear axle, which can output a maximum power of 135kW, and its PHEV+P4 structure can output power simultaneously on the front and rear axles, with a maximum system total power of 355kW, a system peak torque of 762N·m, and an official zero-hundred acceleration of 4.8s. In addition, the car also has an intelligent four-wheel drive control system, which not only plays a certain role in the process of climbing and acceleration, but also intelligently distributes torque during daily driving, improving stability when driving on corners and slippery roads.
02
Two-speed transmissions are designed for different operating conditions
For hybrid models, the most difficult to understand is the working principle of the system under different working conditions, compared to kunpeng DHT "3 engine 3 gear 9 speed 11 mode", lemon DHT hybrid architecture is much simpler. Among them, in the Mocha DHT-PHEV car system can choose pure electric and hybrid two modes, of which pure electric mode is equivalent to a pure electric model, in any working conditions is driven by pure electricity, unless the battery power is lower than the SOC load value, it will automatically switch to hybrid mode.
In the hybrid mode, the vehicle starts and drives at low speed when the same pure electric drive, through the clutch to decouple the engine and the transmission system, the TM motor through the two-stage gear to transmit power to the wheel; in the battery power is insufficient, and the vehicle is running at a lower speed, at this time, whether it is gentle driving or sharp acceleration, the system is in series mode (range) work, the engine is always in the most efficient operating range, so as to drive the generator to generate electricity, the power generated part of the drive motor, the remaining electricity is charged to the battery.
Under the condition of battery power loss, when the speed reaches more than 40km/h (35km/h for HEV models), the engine and motor enter the hybrid mode, and the system determines the power output ratio of the engine and the electric motor according to the driver's intention and the system load at the time.
Among them, when the engine is cruising at medium speed, the system is in the power direct drive mode, the engine is directly driven by the gear group at a large speed, obtaining maximum torque and improving the overall power acceleration performance, and the TM motor is ready to intervene at any time to dynamically adjust the most efficient working area of the engine; at a higher speed cruise, the engine switches to a more economical speed ratio of the gear group direct drive, although the speed is increased, the engine speed is still in the efficient zone, improving fuel economy.
When it is necessary to accelerate and overtake at high speeds, the system will output at full power, providing the best power and the highest power response. In addition, when the vehicle is decelerating or downhill, the clutch is disconnected, and the kinetic energy is recovered through the backwing of the TM motor, and the car also supports intelligent single-pedal driving for maximum energy recovery.
In the driving mode, the performance version (four-wheel drive) also has seven driving modes such as ice and snow, muddy roads, sand, etc., and can switch to pure electric mode in wading mode, close the air intake of the engine, increase the wading height, and improve the ability to drive in the field.
According to official data, in terms of the efficiency of the DHT architecture, compared with the single-stop series parallel architecture (Honda, BYD), the engine is in the optimal economic area under the urban conditions, and the overall efficiency of the system is 3%; the high-speed uniform speed working conditions are comparable; the high-speed climbing conditions, due to the switching of gears, the overall efficiency of the system is 8.5%. Compared with Toyota's THS power shunt architecture, the overall efficiency of the DHT architecture in urban conditions is 0.5%, and the high-speed uniform speed is better than 2%.
03
The positive benchmark ideal ONE wins by technology
The pre-price of the Mocha DHT-PHEV is also from 299,000 yuan, directly hitting the new energy market, and it can be seen from this conference that the car will directly target the ideal ONE with an annual delivery of 90,491 units.
Among them, the range extender technology has advantages in efficiency compared with parallel connection at lower loads, which can achieve speed decoupling and the engine works at the best efficiency. However, in medium and high loads, due to the single mode, excessive dependence on the performance parameters of the motor makes the fuel consumption of the vehicle at high speeds too high.
Unlike the ideal ONE engine only as a range extender, the power output depends on the drive motor, mocha DHT-PHEV adopts a two-stop hybrid structure, providing a variety of working modes, the mileage of pure electric drive at medium and low speed is up to 204km, and the zero hundred acceleration time at full power output is 4.8s, including the use of direct drive mode in high-speed climbing scenarios, which has certain advantages in fuel economy and NVH perspective.
04
Summary of the full text
Mocha DHT-PHEV this plug-in hybrid system, it can be seen that the advantages of pure electric vehicles and fuel vehicles have been combined, so that Weipai further breaks through the ceiling of price and accelerates the occupation of the new energy market. The strategic landing of smart DHT and coffee intelligence also allows us to gradually see the power of technology for the brand upwards.
Weipai will also launch a pure electric endurance product of more than 300km, as well as a more efficient hybrid special engine, but the high-end of the brand is not completely equivalent to the high-end of the product or price, and the continuous force of price stratification is what an independent brand should look like.