BYD 528 amplified moves, how powerful is the new hybrid technology?

The second senior brother plays with the car

2024-05-26 13:56Posted in Shanghai Automotive Creators

The BYD 528 is going to make a big move, and it is clear that the long-awaited hybrid of the new fifth-generation DM-i is coming. The comprehensive range of 2000km and the fuel consumption of 2.9L per 100km are undoubtedly two very eye-catching parameters. To obtain such ability, I have explained in my book "A Book to Understand New Energy Vehicles", transmission efficiency is a key factor.

For this reason, BYD's fifth-generation hybrid system is precisely the choice of planetary gears as the transmission mechanism, so do you know the advantages and disadvantages of this structure?

I'll start with the advantages.

One is that the planetary gear reducer has a high transmission efficiency, generally above 90%, and even some high-quality brands can reach more than 95%. This high efficiency makes it possible to effectively reduce transmission losses and improve mechanical efficiency when transmitting torque.

In BYD's fifth-generation hybrid system, the application of planetary gears makes the coordination between the engine and the electric motor smoother and more efficient, thereby improving the energy efficiency performance of the vehicle.

The second is that the planetary gear reducer is small in size and compact in structure, which is suitable for use in a limited space. This allows BYD to make more efficient use of space when designing the hybrid system, while also increasing the available space in the vehicle.

Because the gears of planetary gearmotors are in a more stable position, noise and vibration levels are generally lower than other types of gear systems. This helps to improve driving comfort and the ride experience of the vehicle.

Of course, this planetary gear is not without its drawbacks.

The first is that planetary gears are difficult to manufacture and require the production of high-precision gears, which makes them often more expensive than other types of geared motors. This could increase the manufacturing cost of BYD's fifth-generation hybrid system.

In addition, the structure of the planetary gear motor determines a relatively fixed transmission ratio, which is difficult to achieve continuous change. However, in BYD's hybrid system, this deficiency can be partially compensated for through an intelligent energy management system and intelligent switching of multiple driving modes.

So, what else are you looking forward to about BYD's fifth-generation DM-i hybrid technology?

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