Text/Paula
Hybrid type, also known as series parallel hybrid system, should be able to better understand, mixed hybrid has the characteristics of series, there are also parallel characteristics, is a more complex hybrid structure.
The power system of the hybrid system is also composed of an engine, a motor and a drive motor. The same as the tandem type is that the engine can charge the battery, the difference is that the engine can directly drive the vehicle under the system; the same is that the engine can be driven directly in parallel, and the difference is that the generator can charge the battery when the motor is working under the system.
At present, many models on the market have adopted a hybrid hybrid structure, including Toyota Prius, Hybrid Camry, Lexus CT200, Honda's i-MMD and other models Below honda's i-MMD hybrid system as an example, understand how the hybrid hybrid system works.
First of all, looking at the hardware structure, the Honda CR-V Sharp Hybrid consists of a 2.0L Atkinson cycle engine, a generator, a drive motor, an engine direct-connection clutch, a PCU power control unit, and a lithium-ion battery pack.
The engine is connected to a generator, the drive motor is connected to the wheels, there is a clutch between the drive motor and the generator, and the motor is connected to the wheels. There is a clutch between the two motors, and when closed, the engine is connected to the wheels, and the general structure is as follows:
When the clutch connected to the engine is disconnected, it is equivalent to a tandem structure. When the clutch connected to the engine is closed, it is equivalent to a parallel structure.
Honda i-MMD hybrid system can provide a variety of operating modes, of which the main operating modes are three: pure electric mode, hybrid drive mode, engine direct drive mode.
In pure electric mode, when the engine is turned off and the generator does not work, only the drive motor drives the vehicle forward, which is usually used when operating under low loads, such as when starting the vehicle.
In series hybrid mode, the clutch in the picture above is disconnected, and the engine generates electricity through the generator, driving the motor to drive the vehicle forward.
In parallel hybrid mode, the above clutch is turned off, and the engine and drive motor output power at the same time, driving the vehicle forward, usually in overtaking and accelerating sharply.
It can also be driven directly by the engine, when the vehicle's power source comes only from the engine, usually at high speeds, when the engine is more fuel efficient.
Hybrid combines the advantages of series and parallel, with more drive modes and a stronger power output. The engine in the Honda i-MMD hybrid system is not directly driven, usually driving the motor to drive the vehicle, so the driving experience is closer to that of a pure electric vehicle, the driving is more quiet, and the response is faster. Of course, the complex structure of hybrid hybrid also puts forward higher requirements for car companies, how to optimize the system and improve fuel economy is a problem that car companies continue to explore.
Write at the end:
The hybrid hybrid structure does amplify the advantages of the parallel and tandem separate structures, and the hybrid hybrid structure makes the vehicle drive more and more fuel economy, achieving the effect of 1+1>2.