At present, new energy vehicle manufacturers are not only in the volume configuration, volume price, but also in terms of power and battery life. No, SAIC Motor has also recently released its latest generation of plug-in hybrid technology: DMH super hybrid system. In fact, since 2013, when SAIC launched the Roewe e550 of the first-generation EDU electric drive system, it has been iterated to this day, and SAIC's technical reserves in the plug-in hybrid system have reached the fourth generation of products.
Models that are known to be equipped with SAIC's fourth-generation DMH plug-in hybrid technology include the Roewe D7 DMH, the upcoming D5X DMH, and of course, the iMAX8 DMH. Although these three cars all use the same plug-in hybrid structure, it is worth noting that the Roewe D5X DMH and the subsequent iMAX 8 DMH have higher requirements in terms of acceleration performance and high-speed endurance and re-acceleration ability, so correspondingly, on the basis of maintaining the engine and P1+P3 dual-motor hybrid structure, the engine is upgraded to 1.5T, with a 2-speed DHT gearbox transmission form, the purpose is to improve the power at the same time, can better take into account performance and fuel consumption.
Specifically, let's take a look at the working logic of SAIC's 2-speed DHT gearbox. It is different from the common single-speed DHT gearbox, the gearbox will choose the best gear according to the current working conditions, when the power output is needed, it will choose a higher gear ratio, and then improve the power transmission efficiency, when fuel economy needs to be prioritized, choose a lower gear ratio. Generally speaking, on fuel vehicles, the more gears, the more delicate the power output, the faster the low-speed power burst, the high-speed cruising power has good durability, and the economy is higher. Of course, if the comprehensive cost is considered, it must be that the application scenarios of the 3-speed DHT or 4-speed DHT gearbox are richer, but the choice of the 2-speed DHT gearbox may be a balanced solution that takes into account the cost, manufacturing difficulty and performance.
And the choice of this new powertrain is also beneficial, which is reflected in the Roewe D5X DMH, which has good top speed and acceleration performance. Combined with the previously disclosed information, the new car's 000 acceleration time is about 6.9 seconds, which has surpassed most of the family SUV models in the same class, and the maximum speed can reach 200km/h, and the performance is also remarkable in terms of high-speed cruise reacceleration ability.
Specifically, the fourth-generation DMH super plug-in hybrid technology equipped with Roewe D5X DMH adopts P1+P3 dual-motor hybrid topology, and the matching 1.5T engine comes from SAIC Blue Core, the engine adopts Miller cycle technology, equipped with EGR exhaust gas recirculation and variable section turbine VGT, the thermal efficiency can be achieved up to 43%, and the comprehensive performance can be ranked in the forefront in China.
In addition, the car also has a 21.4kWh battery pack, a pure electric range of up to 135km in CLTC mode, a fuel consumption of 5.25L/100km in WLTC mode, and a maximum of 6kW external discharge function in the middle and high-end models, which is enough to meet the needs of low-cost and comfortable travel for general short-distance commuting scenarios.
In terms of dynamic driving experience, this car provides three driving modes: sport, standard and comfortable, and the personal feeling comfort mode is more precise, it is the conventional "economic mode", and the response of the whole set of power output is not very positive, but the standard mode is more suitable for our daily power needs, and the power output is obviously more follow-up. In Sport mode, the power response is very positive, and you can feel the feeling of pushing back with a tap of the throttle, but the kinetic energy recovery is also more obvious, and there is a feeling of being pulled when the oil is retracted. In addition, this car also provides pure electric priority and intelligent hybrid mode, no matter which setting, the personal feeling of use is almost the same, especially the presence of the engine, it is really low, it is easier to drive, and the whole set of power is smooth and silky.
The chassis adopts a front MacPherson rear multi-link independent suspension, and the overall tuning is more comfortable, but it does not blindly pursue comfort, but retains some familiar road feeling, so that you will not be so boring to drive. It's just a pity that the chassis of this car is not so good at filtering and absorbing road bumps, and there is still room for improvement.
epilogue
On the whole, the power system of the Roewe D5X DMH car can be used in most travel occasions, taking into account the power performance and economic characteristics, and compared with the current market situation, its performance is more realistic. Of course, what makes me feel that this car is excellent is the endurance and economy, and it can run 1300 kilometers with full fuel and full power under CLTC conditions, which can fulfill many people's long-distance travel dreams.