What are the advantages and disadvantages of HEV hybrid vehicle?
As for why PHEV (plug-in hybrid vehicle) has become the mainstream, we can get the answer by analyzing the advantages and disadvantages of HEV system. Many people think that the ordinary "oil-electric hybrid" is the most ideal hybrid platform, because the installation of charging piles does not need to consider the parking space demand. However, this is an embarrassing evaluation.
Because you can't rent or buy a parking space, this is not a technical problem, but a personal ability problem; You can't deny the fact that technology is advanced just because your ability is weak.
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Overview of HEV_ characteristics
Advantages-No need to charge
Disadvantages-can't charge
I will elaborate on not charging, focusing on the shortcomings of not charging. Oil-electric hybrid technology is mainly based on American-Japanese joint venture brand cars, and the foundation is "ECVT hybrid transmission"; This technology has been seriously mythical, and it is labeled as fuel-saving, smooth and stable in quality. They are all labeled by Japanese powder, but the fact is really embarrassing. Because ECVT is "two motors+two reducers" in plain English, its structural characteristics are as follows.
Knowledge: This technology was popularized in BYD F3DM green hybrid system (PHEV) in 2008, which means that Toyota's "Double Engine E+" was mass-produced by its own brand 12 years ago. However, this technology can not effectively control the NVH of vehicles, because the generator motor connected in series with the internal combustion engine has only one forward gear, and the power adjustment depends entirely on the speed, so the nodes that need high power output not only have high fuel consumption but also have high noise.
Secondly, the integrated motor transmission limits the motor power, and the vehicle performance is as bad as that of the current HEV, so the original DM green hybrid system was eliminated early. In the later stage, SAIC used a green hybrid system, and there has been no breakthrough in technology. But at least it shows that ECVT is not a unique technology. Gearboxes such as DM 1.0/EDU are all of the same type, but they are named differently. So what are the shortcomings of this machine except that it can't perfectly match the internal combustion engine? -Can't charge.
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PHEV_ operating mode
EV_ pure electricity
HEV_ Hybrid Electric Power
REEV_ extended range driving
Toyota HEV adopts the second hybrid mode, in which the internal combustion engine mainly drives the generator to charge and is responsible for auxiliary output power. The vehicle is driven by an internal combustion engine and an electric motor. Honda HEV mainly adopts the third type of "extended driving". Vehicles are mainly driven by motors, internal combustion engines and generators, and are charged most of the time. When the charging efficiency can't meet the power consumption, assist driving.
Key point1:The modes that ECVT can realize in Tian Liang are all in the later upgraded DM3.0 system, so these two systems only have shortcomings. Because these HEV models have no pure electric drive mode, and PHEV can always have a pure electric battery life of 80/ 100 km, so daily short-distance commuting does not need to burn oil! ——HEV focuses on fuel saving, and PHEV does not burn oil 80% ~ 90% of the time. Which model is more energy-efficient and saves the cost of car use? However, this is not the most important thing.
Point 2: 2: The 2:DM3.0 system has independent layout of the driving motor, which can be freely arranged in the mode of "P3/P4/P3+P4". The power of single-drive motor on the platform will be higher than that of ECVT dual-motors. By changing positions, various modes such as front drive, rear drive+four-wheel drive and full-time four-wheel drive can be realized, and ECVT can only be an entry-level front drive. Therefore, excellent PHEV vehicles always have the multi-stage performance of HEV, which determines that plug-in hybrid vehicles will be more fuel-efficient when driving in the "mild state" of plug-in hybrid vehicles, and the fuel consumption will be high when driving in the "performance state" of plug-in hybrid vehicles.
Summary: HEV hybrid vehicle is simply a "low-cost, low-configuration hybrid system". Before PHEV was upgraded to be equipped with "BSG system", this vehicle did have some advantages, and it could achieve low fuel consumption with low performance. However, after the mainstream plug-in hybrid technology is added to the driving power generation mode, HEV can be said to have no advantage in other aspects except reducing the price-the price of HEV cars of joint venture brand is not low, so these cars will inevitably be eliminated, which is also the reason why Toyota and BYD jointly set up a new energy automobile company.