What is the difference between DM and DM-i?
2 Answers
1. DM-i has multiple advantages that lead other hybrid technologies, and its "core concept" is to prioritize electricity and use fuel as a supplement. In terms of architecture, the DM-i super hybrid is based on a high-capacity battery and high-power motor, relying on the high-power motor for driving during vehicle operation. 2. The core component of BYD's DM-i super hybrid technology is the newly developed Xiaoyun plug-in hybrid dedicated engine, which comes in two different versions—the 1.5L engine is mainly used in the Qin PLUS and Song PLUS, while the 1.5T turbocharged engine is used in the larger Tang DM-i model. 3. When the DM-i model has sufficient battery power, it operates like a pure electric vehicle, with the motor providing enough power for driving under various road conditions. When the battery is low, the DM-i model autonomously decides whether to use electricity, fuel, or a combination of both based on system conditions.
When it comes to BYD's DM and DM-i, as an owner who has driven hybrid vehicles, I'm more familiar with their differences. DM is BYD's earlier dual-mode hybrid system, emphasizing a sporty feel. Like my older model, it combines the engine and motor for strong power, delivering a noticeable push-back sensation when accelerating, but with higher fuel consumption—averaging around 6-7L/100km in city driving. DM-i, on the other hand, is the newer intelligent dual-mode system. I test-drove a newer DM-i model, which optimizes the synergy between the engine and motor, focusing more on fuel efficiency. In urban conditions, average fuel consumption can drop below 4L/100km, with the motor taking the lead for a quieter and more economical ride, though acceleration isn’t as quick as DM. Simply put, DM suits performance enthusiasts, while DM-i is more practical and energy-efficient, ideal for commuters. Additionally, BYD is actively promoting DM-i technology as it aligns with green license plate policies and is better for the environment.
