is focusing on PHEVs in domestic cars and HEVs in joint venture cars, there is no doubt that most consumers are more appreciative of hybrid; because this is a technology from foreign countries, even if this technology is low-level or simple, but the consumer Most of them are ignorant. This evaluation may be difficult to accept, but it can be said with certainty that this is the fact; but at the same time, it cannot be denied that the early plug-in hybrid vehicles have the shortcomings of convenience, such as the lack of BSG generator and starter integrated machine, and only parking after power loss In-situ power generation, or use of charging piles for charging; there is a gap compared with the hybrid system of oil and electricity, so does it mean that PHEV is not a suitable choice?
In 2008, BYD launched the "DM Green Hybrid System", named CVT continuously variable transmission gearbox. The essence is the same as the current Toyota and Honda ECVTs. The core structure is as follows. The internal combustion engine is connected in series with the generator motor. motor. The operation mode includes the conventional hybrid electric vehicle. The vehicle uses the electric motor as the main driving force, and the internal combustion engine is responsible for power generation and auxiliary drive; the ECVT of Toyota, Honda and Ford runs in this way, so the hybrid electric vehicle is not a new technology. It has been popularized in Shenzhen years ago.
SAIC EDU (later renamed 2AT or AMT) is also this type of hybrid system, because its technical prototype is DM green hybrid; there is no difference between the basic structure and the operating principle. The so-called 2AT only refers to the internal combustion engine and the generator, and the electric motor They only control one forward gear. The adjustment of output power (and vehicle speed) depends on the rotation speed of the two machines. Because the rotation is linear and uninterrupted, BYD calls it a continuously variable transmission. SAIC uses two sets of single The speed gear is named 2AT.
However, EDU has been upgraded in SAIC's audience. The latest generation of gearboxes adds two physical forward gears to the internal combustion engine. There are also two motors, which can be combined to achieve a total of ten gears. So far, it can be said that EDU absolutely surpasses all brands of ECVT and green hybrid systems, but BYD abandoned the green hybrid system early and upgraded to a more powerful DM parallel plug-in hybrid. The
DM3.0-PHEV system is the current benchmark for hybrid technology. Is this evaluation suspected of being flattered? There are nothing more than two operating modes for hybrid electric vehicles. Toyota is mainly based on the simultaneous output of two machines, and Honda is mainly based on extended range (internal combustion engine power generation and electric motor drive). It will only be used in the middle and high speed phases where power consumption is too high. The internal combustion engine assists the drive, so is the PHEV that can realize these two operating modes more advanced? The
3.0 system has joined the "BSG generator motor". This machine is no longer integrated in the gearbox and forced to change the structure, but integrated in the internal combustion engine to achieve higher efficiency of power generation; of course, normal hybrid driving can be achieved. , And extended-range driving at low and medium speeds. More importantly, the technology that will be updated by the Sanqing platform is to use the front motor and BSG to generate electricity at the same time, and the vehicle will be driven by the motor; this is a dual-engine ECVT with only two motors (including generators) integrated in the transmission. EDU can't do it, so this system shows that the parallel plug-in hybrid is more advanced because there are other operating modes.
Main driving mode: EV! Gas-electric hybrid vehicles can also be driven purely electric, but the standard is often single-digit speed limits, which will reach the limit when the tortoise moves a few hundred meters; and a slightly faster speed will activate the engine. This pure electric mode generally Can be used for reversing. However, the plug-in hybrid system can drive more than 50 kilometers on pure electric power, and the excellent standard will be about 100 kilometers; few users can exceed this standard for daily commuting, so of course, as long as the daily recharge, it does not use oil. According to the analysis of the real standard, the short-distance standard is basically 300 days in a working day plus daily driving. I am afraid that only a few dozen days in a year will use the hybrid mode, and the hybrid mode can be the same as the hybrid mode. To save fuel, is there any reason to choose pure HEV? This is called quality degradation. The motor of
HEV is integrated in the gearbox, and the dual motors must include generator motors; the horizontal type is the lowest cost option, and the power of the two motors will be strictly limited. The mainstream ECVT dual motors only have a standard of about 50kw, and the high-standard options will only exceed 100kw. What about the performance of a purely driving motor? The motors of micro electric vehicles also have tens of kilowatts, and the first-line plug-in hybrid steamThe power of a single motor of a car will also be more than 100kw; so the power experience of the two types of vehicles is not at the same standard, but this is not to say that the hybrid technology is worthless, but it needs to find an accurate positioning.
Why are domestic cars mainly plug-in hybrids? Regardless of BYD, Changan, Changan or SAIC and Geely, the hybrid vehicles of these brands are mainly PHEVs. The reason is not that hybrid and light hybrid systems cannot be created. Plug-in hybrids are simply HEVs. However, joint-venture cars are hybrids of gasoline and electricity, and domestically-produced cars using the same model are difficult to be recognized. After all, there are differences in brand influence, and brand recognition is still not healthy at this stage.
Therefore, domestic cars will choose plug-in hybrids with stronger performance and lower energy consumption, but at the same time the manufacturing cost is much higher; this shows how to choose, the cost of hybrid technology is much lower. This type of vehicle is suitable for entry-level vehicles whose main target is less than or equal to 100,000. Some independent brands will launch such vehicles in the near future. At that time, we will objectively take a look at the HEV level of the two major car series, and compare PHEV to determine which system is more Advantages, the final option can be determined by the comprehensive budget.
