What does the EHS hybrid system mean?
2 Answers
EHS stands for "Electric-Hybrid-System," and as the name suggests, it reflects a hybrid system that is "electricity-dominant." As a core component of the DM-i Super Hybrid system, the EHS Super Hybrid System acts as the "brain center" for the entire architecture, fully embodying the "i" in DM-i—intelligent. Through intelligent power distribution among the engine, generator, and drive motor, the system operates more efficiently within optimal ranges, significantly reducing overall vehicle energy consumption and ultimately achieving ultra-low fuel consumption. From an architectural perspective, the DM-i Super Hybrid is designed around high-performance, high-power flat-wire motors, primarily relying on high-power, efficient motors for propulsion. The gasoline engine's main function is to generate electricity within its efficient RPM range and provide direct drive during high-speed conditions. This highlights the critical role of the motor in the entire system. Traditional motors use multi-strand wire windings, which waste space, have poor heat dissipation, generate more heat, and struggle to further improve power density. The EHS hybrid system's drive motor adopts the latest flat-wire winding technology, offering superior heat dissipation, higher space utilization, and a power density of up to 44.3 kW/L, with peak efficiency reaching 97.5%. Additionally, advanced oil-cooling technology significantly enhances heat dissipation, enabling a maximum speed of 16,000 RPM, a peak power of 160 kW, and a peak torque of 325 N·m. Flat-wire motors not only deliver higher peak power and torque but also feature a broader constant-power range and more reserve power. Their high-efficiency range covers more operating conditions, far exceeding that of conventional motors, laying a solid foundation for the DM-i Super Hybrid's outstanding energy efficiency. Meanwhile, the EHS hybrid system's dual-motor control integrates BYD's fourth-generation IGBT technology, achieving a comprehensive efficiency of 98.5% and ensuring that the high-efficiency zone (where control efficiency exceeds 90%) accounts for 93% of operations, greatly reducing energy loss.
I've been researching automotive technology, and the eHS hybrid system is actually an advanced hybrid powertrain. Typically, like Honda's e:HEV, it ingeniously combines a gasoline engine with an electric motor to enhance vehicle efficiency and environmental friendliness. Specifically, the system includes an engine that drives the vehicle or generates electricity, an electric motor that provides additional power, and a battery pack that recovers braking energy to store electricity. During operation, at low speeds or in congested traffic, it prioritizes using the electric motor for quiet and smooth driving; during high-speed driving or acceleration, the engine kicks in to ensure sufficient power. This intelligent switching not only saves fuel but also reduces exhaust emissions, offering a seamless driving experience. However, battery lifespan and maintenance need to be considered, such as regular system software updates to prevent issues, making it a suitable choice for urban commuters looking for cost-effective and hassle-free models.
