Which part is the key component of the sub-power system?

Internal combustion engine, battery, control system, etc.

Split powertrain is a system that combines internal combustion engine and motor to improve fuel economy and reduce exhaust emissions. These components form a powertrain, and all components cooperate with each other to realize energy conversion and transmission to drive the vehicle.

The internal combustion engine in the sub-powertrain is the main power source of the whole system; Battery is an energy storage device in power distribution assembly, which can store the electric energy generated by motor and generator for internal combustion engine. Control system is the core part of powertrain, which can control the work of internal combustion engine and motor to achieve the best fuel economy and exhaust emissions.