In recent years, due to environmental pressure, the government has introduced a series of energy conservation and emission reduction policies to force automobile companies to complete the task of reducing fuel consumption. Under the pressure of dual points, major car companies have launched or announced the launch of plug-in hybrid vehicles, especially the 48V hybrid vehicles that are the easiest to make quickly. For example, the mHEV version of Geely's Borui GE is a 48V hybrid of PP2.5 power. BYD's third-generation plug-in hybrid DM? 3.0 technology also adds a BSG motor. Are they the same?
The 48V BSG motor and BYD's high-voltage BSG motor are actually similar in function. They both have the functions of starting mode, in-situ power generation, energy recovery, and driving assistance, but there is still a big difference in performance. Differential.
The biggest difference - adding a high-voltage BSG motor to realize series mode
With the support of high-voltage BSG motor, BYD DM? 3.0 technology can realize HEV series mode. In the HEV series mode, the engine drives the BSG motor to generate electricity, and the electricity generated by the BSG motor can be used by the drive motor to drive. In addition, the BSG motor can also generate electricity intelligently according to the driving conditions, which can make the vehicle drive more efficient and extend the time Pure electric battery life effectively reduces the occurrence of power feed situations. The 48V? BSG motor has small power and weak power generation capacity, and the power generation is small and cannot meet the driving requirements. It is impossible to form a series mode when only driving the motor and the 48V motor.
The other is the P2/P2.5 single motor architecture used by many German plug-in models on the market. From a basic principle, it is impossible for the motor to generate electricity at the same time when driving. Cannot use series mode. If you encounter a congested road condition and the car consumes a lot of power, the vehicle will easily feed power and the driving experience will deteriorate. For example, when athletes compete, you can think of a single-motor architecture as walking on only one leg. BYD's third-generation dual-mode technology adds a high-voltage BSG motor, which is equivalent to an extra leg for athletes, and both legs can exert force at the same time. , you can also rest and work at the same time, which will naturally make running easier and more comfortable.
Secondly, the high-voltage BSG adjusts the engine speed, bringing better economy and smoothness
The BSG motor can keep the engine in a high-efficiency speed range for a long time by adjusting the engine speed. Maximize the potential of the engine, allowing the engine to skip the high fuel consumption range at low speeds and directly enter the high-efficiency zone from the beginning of intervention, thus driving improvement in economy.
On the other hand, during the upshifting and downshifting processes, the BSG motor can quickly match the engine speed with the vehicle speed and gear, reducing clutch slippage, making gear shifts smoother and faster, and the driving experience smoother. . This also indirectly extends the life of the gearbox and greatly reduces its failure rate. In terms of technology in this area, the high-voltage BSG motor with DM? 3.0 technology is the Pro? Plus version of the 48V? BSG motor.
Finally, the high-voltage BSG replaces the traditional starter and says goodbye to idling vibration
For traditional vehicles, when starting at idle speed, due to the adjustment characteristics of the engine, the vehicle is prone to vibration and Higher fuel consumption. Research data shows that under urban conditions, the proportion of idle fuel consumption to total consumption can reach 15% to 20%. The high-voltage BSG motor with DM3.0 technology can draw power from the high-voltage power battery to assist engine start and stop. It directly crosses the low-speed jitter zone when starting to achieve quick and smooth engine start and stop. While reducing fuel consumption, it also brings pure electric power to the driver. The driving experience of the vehicle.
At the same time, due to the addition of high-voltage BSG motors, the operating range in which the vehicle can generate power is greatly increased, ensuring the power generation capacity of the vehicle and reducing the possibility of a feed state. This can also ensure that, generally under HEV operating conditions, the vehicle starts directly on pure electricity, which is fuel-efficient and comfortable. When the vehicle is discharged externally in situ, when the energy of the vehicle's power battery is exhausted, the vehicle can generate electricity in situ through the BSG motor, which can be used for home emergency power supply and outdoor play, whatever you want.
Someone may ask, 48V weak hybrid technology cannot be compared with BYD’s third-generation dual-mode technology, so why are major companies still developing and putting it into production? First of all, we have to admit that the 48V system is a simple and effective solution for reducing fuel consumption. For traditional car companies that mainly focus on fuel vehicles without new energy vehicle technology accumulation, it can help them achieve their fuel consumption reduction goals as much as possible.
Moreover, the 48V design cost is lower and the fuel consumption reduction system only needs to add a lithium-ion battery pack (power type) and a DC-DC converter. It only costs about 5,000 yuan. Therefore, in order to protect their immediate profits, some manufacturers inevitably choose to treat dead horses as live doctors. They want to increase and reduce fuel consumption first, which means that they can last for a while.
Although the 48V light-hybrid system has small changes, a short development cycle and is fuel-efficient, it still cannot meet the fuel consumption regulations in 2020, and its performance is not as good as BYD's DM? 3.0 technology. Therefore, in the long run, 48V technology can be regarded as treating the symptoms rather than the root cause. It is not strong enough and will be eliminated by the market sooner or later.
The high-voltage BSG motor of BYD DM? 3.0 technology is the product of the evolution of BYD's dual-mode technology. With the help of the high-voltage BSG motor, the power system architecture is further improved, which greatly improves the vehicle driving experience. improvement.
Conclusion: The service that others cannot learn from has finally made Haidilao popular and has become Haidilao’s biggest advantage in the hot pot industry. This is the core competitiveness of the enterprise. Toyota, the most powerful car company in the world and one of the first car companies to research new energy vehicle technology, could not learn BYD's technology in the new energy field, so there was a story of forming a group to join forces. I think Toyota will definitely not be the last one.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.