Roewe D5X DMH hybrid technology

Saic Motor held the "China Power" DMH technology brand conference in Shanghai on May 10, and officially released its latest generation of plug-in hybrid technology: DMH super hybrid system. In 2013, SAIC launched the Roewe e550 with the first-generation EDU electric drive system. After continuous optimization and upgrading, it is now the fourth generation of products, and today we will understand its highlights together.

Saic is one of the first domestic manufacturers to start plug-in hybrid technology research, in 2013, Roewe e550 was equipped with the first generation of EDU hybrid system, P1+P2 dual motor and 2-speed transmission mechanism. At this time, the development of plug-in and pure electric fields has just started, and only 10 years later, plug-in hybrid and even pure electric models have occupied half of the automotive field.

With the country's strong support for the new energy automobile industry, the field of pure electric plug-in has developed rapidly in the past 10 years. In 2019, the second generation EDU hybrid system was released, the motor and engine adopted a parallel axis layout, 6+4 a total of 10 gear, applied to the 2019 MG 6 PHEV and other models.

In 2022, the third generation of Roewe eRX5 was launched on the market, SAIC launched the EDU G2 Plus hybrid system, which has changed in structure with the previous generation, using the motor to partially match the 2 gear, the engine end corresponds to the 5 gear layout, or 10 gear, but the gear combination has changed from 6+4 to 2×5.

In 2024, the DMH Super Hybrid system, which is what we call the "fourth generation of DMH hybrid technology," was unveiled. The DMH super hybrid architecture was initially applied to the Roewe D7 DMH, and the subsequent DX DMH and iMAX8 DMH will also adopt the same plug-in hybrid structure. Despite the naming convergence, the Roewe D7 DMH has the same power flow layout as the latter two models, but the difference in hardware configuration is still relatively large.

Roewe D7 DMH is equipped with DMH hybrid architecture, which is composed of 1.5L engine, P1+P3 motor and single-speed DHT gearbox, and adopts the dual-motor hybrid omnibus structure which is currently the mainstream in the market.

The Roewe D5X DMH and the subsequent iMAX8 DMH have higher requirements for acceleration performance and high-speed cruise reacceleration capability than the D7, so correspondingly, while keeping the engine /P1+P3 dual motor hybrid structure unchanged, the engine was upgraded to 1.5T and adopted a 2DHT transmission form.

The D5X DMH 1.5T engine is still the one in the SAIC Blue core power series. For the hybrid system, the corresponding design and adjustment optimization have been made compared with the version provided for the fuel version RX5. The corresponding power is 110kW and 235N·m, which is lower than the parameter in the pure fuel state (138kW/300N·m). In addition, through the adjustment of cycle conditions and software, the maximum thermal efficiency of the engine can reach 43%.

Note: This article cites data and images from the Internet