At a time when the world is calling for full electrification of automobiles, hybrid as a transitional product has been favored by major car companies, especially in China, plug-in hybrids can enjoy new energy subsidy policies, which makes many independent brands begin to develop hybrid systems. From the current market situation, there are two brands that really achieve mass production and sales, namely BYD DM-i and Great Wall DHT, and their product prices are basically on the same level, so what is the difference between the two sets of hybrids? Which one is more suitable as a buyer?
First of all, let's look at the Great Wall's DHT hybrid, which is mainly composed of a 1.5L and 1.5T hybrid special engine, a drive motor, an integrated DCDC, a dual motor controller and a two-position gearbox. The working logic is divided into series drive, direct drive and parallel drive. Among them, the series drive is powered by the engine to supply energy to the battery, and then driven by the drive motor to drive the entire car; the direct mode for several years is to use the engine as the main power source in the case of high-speed driving; and the parallel mode, as the name suggests, is jointly powered by the engine and the motor to provide power to the vehicle, mostly used in the rapid acceleration scenario.
At first glance, there is not much difference in working logic from Honda's i-MMD hybrid, but careful friends can notice that the Great Wall hybrid has an additional two-speed transmission. The effect of adding a gearbox is that it can complete the parallel drive mode at a lower speed, and it can be known from the official data that at a speed of 40km/h, the engine can provide power for the vehicle through the gearbox, so at low and medium speeds, DHT hybrid can provide better power response.
However, although there are more gears, this does not mean that there are no shortcomings. First of all, the existence of the gearbox, for the power transmission is a certain loss, followed by the first gear of the engine speed will fluctuate, can not be like some of the hybrid without a gearbox so that the engine is always maintained in a relatively economical speed range.
In addition, it is the clichéd tuning problem, the more complex the powertrain, the higher the adjustment ability of the engineer, in which kind of working conditions to connect in series, in which speed range to parallel, this needs to be considered. Otherwise, the texture of the actual drive is very worrying, but before the test drive Macchiato, the overall driving is not too much fault, the hybrid car is quiet, smooth It can do it. Therefore, the difficulty of adjustment is not much to do with us consumers, as long as the product is not a problem to use.
BYD's DM-i hybrid is mainly composed of a 1.5L/1.5T Atkinson cycle engine, a drive motor, an EHS hybrid system and a hybrid blade battery. It can also provide tandem, parallel and engine direct drive modes, but BYD's hybrid is missing a two-speed transmission, so the cost will be lower in cost, and it will have more advantages in running quality and transmission efficiency.
In addition, the two car companies in the energy selection route also appeared some differences, the Great Wall DHT hybrid most of the products are in the form of HEV to face the market, recently Macchiato also added PHEV plug-in hybrid form, but the basic working logic has not changed, but increased the battery capacity and a new set of charging devices, and does not support fast charging. In this way, PHEV models are more about responding to new energy policies and targeting specific types of consumers.
The BYD DM-i is a full range of plug-in hybrid forms of presentation, which also means that it can enjoy the green card in limited cities other than Beijing, and dm-i achieves a fuel consumption of 4.4L of 100 kilometers in the state of battery loss, which is not much different from ordinary HEV hybrid models. And DM-i due to the larger battery capacity, can provide 50-100km of pure electric mileage, if there are charging conditions at home, it can be used as an electric vehicle.
summary
In fact, whether it is BYD or the Great Wall, their hybrid system is highly competitive in the market, the main plug-in hybrid DM-i can take care of consumers in specific cities, while exempting the purchase tax can also reduce the cost of car purchase; and dhT hybrid main HEV form can allow it to cover more consumers, and the car experience that is no different from the oil car makes it more compatible.