A plug-in hybrid with a double electric motor and no gearbox is possible through a system called an electric-first or parallel-series hybrid transmission that uses a fixed gear ratio and power-split device instead of a traditional multi-gear transmission. The two electric motors, combined with a sophisticated power control unit, can operate the vehicle independently or together with the gasoline engine to achieve a seamless transition between power sources and eliminate the need for a multi-gear automatic transmission, which is a significant advantage of electric-only driving.
How it works
Power management: The system manages power delivery by using a power control unit (PCU) to switch between different modes of operation, such as EV drive, hybrid drive, and engine drive.
Torque split: The two electric motors are designed to work together with the internal combustion engine to provide power to the wheels, and a fixed ratio with three gear sets is used to split the power between the two motors.
Hybrid control: The system's ability to seamlessly switch between electric and gasoline power, and to operate the motors independently, means it can achieve high efficiency and performance without a traditional multi-gear transmission.
Benefits
Increased efficiency: By using a power-split device instead of a traditional multi-gear transmission, the system can improve fuel economy and reduce emissions.
Improved performance: The system's ability to seamlessly transition between electric and gasoline power, and to operate the motors independently, allows it to provide strong acceleration and overall performance.
Greater simplicity: Eliminating a multi-gear transmission reduces the complexity and cost of the powertrain, as well as making it simpler to manufacture and repair.
Electric-first operation: The system's ability to drive purely on electric power for everyday trips is a key feature of plug-in hybrids.
νομιζω ότι κατι παρόμοιο μπορει να γινει και σε full hybrid. ηδη αυτο γινεται σε plug-in hybrids
