In the world, there are only two hybrid systems, one is Honda and the other is Toyota.
This year, Guan is an independent brand with 4 kinds of hybrid technology: Geely Raytheon technology, Great Wall DHT hybrid, Changan iDD hybrid technology and BYD DM-i super hybrid technology. Among them, BYD super hybrid technology is plug-in hybrid power, which we will not talk about in detail. It is said that toyota and Honda's two hybrid technologies have "sealed the road", so how did the domestic hybrid technology start?
Great Wall Lemon DHT gearbox
Gilly Thor DHT Pro
First of all, Honda and Toyota's hybrid technology, in some dual-engine versions of the configuration table we can see such a column, the gearbox is the use of E-CVT stepless gearbox, but in essence only Honda is the use of CVT stepless gearbox. The domestic Chery, Great Wall, geely all use DHT gearbox, DHT is a hybrid system dedicated gearbox.
The DHT transmission here is not a DCT (dual-clutch transmission), and many people often confuse the two.
To discuss the difference between the principle of domestic hybrid technology and the Shuangtian, let's first talk about the hybrid technology of Honda and Toyota. First of all, you have to understand that when the Toyota THS hybrid system and the Honda i-MMD Toyota were launched, there was only one goal: fuel saving.
Constituent devices
When Toyota developed the THS hybrid system, it had an unshakable patented technology: that is, the planetary gear set. Since the oil-electric hybrid technology is paid attention to, then when the oil is supplied to the engine, when the oil is charged to the motor, and when the driving work is involved, the planetary gear set is needed to completely, in short, its main working principle: reasonable arrangement of oil and electricity distribution.
At the start-up, it is mainly driven by an electric motor
When accelerating, the engine and motor work together
It is driven by an electric motor at low speeds and a motor at medium and high speeds. When the battery is out of power, the planetary gear set distributes the power output of the engine to charge the battery, which is Toyota's hybrid technology, which means that the motor is a working state in any case.
When decelerating or braking, the rotating wheels generate electricity with an electric motor, and the kinetic energy becomes electrical energy and is recycled into the battery.
The main component of Honda's i-MMD hybrid system is the E-CVT, and Honda's hybrid system distributes the power of the engine and electric motor through the E-CVT. Unlike Toyota, the electric motor only works at low speed, and in the case of medium and high speed, the engine directly intervenes in the work, and the direct drive mode can meet the greater power demand.
Although from the book point of view, at the same price point, it seems that it would be better to choose a Toyota that has been working on an electric motor. But comparing the fuel consumption of the Toyota Camry and the Honda Accord, the two are almost the same. But in terms of the overall driving experience, the medium and high speed has the blessing of the motor, and the quietness and speed of the acceleration are obviously better for Toyota.
The DHT hybrid transmission consists of two motors, the main drive motor (TM motor) and the GM motor responsible for generating and managing the engine. The TM motor is directly connected to the wheel, and the TM motor is responsible for the role of the drive regardless of the speed of the vehicle. Therefore, the power of the TM motor should be large and the speed should be wide enough. When choosing domestic hybrid technology, TM motors are important.
The GM motor is rigidly connected to the engine with a clutch in the middle. When the clutch is disconnected, the TM motor drives the wheels directly, and the engine generates electricity for the GM motor. When the clutch is closed, the GM motor and engine intervene in the wheel work. That is to say, the disconnection or closure of the clutch depends on how fast the vehicle needs to be and how deep the accelerator is.
Honda i-MMD system
The overall principle is similar to the Honda i-MMD, especially the intervention time of the GM motor is very critical. Then to distinguish the smoothness and good and bad of the DHT gearbox, there are different gears of the DHT gearbox, such as the Lemon DHT architecture of the Great Wall, the gearbox can reach 2 gears at most. Geely Raytheon Hybrid System claims that its gearbox can reach 3-speed switching. Chery's dual-motor drive-based configuration has the world's largest number of 11 combined gears.
From the principle point of view, the DHT hybrid special gearbox is not the so-called "half-hanger", the working principle is logical, and it has similarities with the Honda I-MMD. At present, whether it is the hybrid DHT gearbox used by the Great Wall, Geely or Chery, it is inseparable from the principle of eight or nine, and more importantly, it is a long-term practice and the first time driving body feeling test to judge whether it is good or bad.
Then again, the originator of the domestic DHT hybrid gearbox is saicid's EDU electric drive transmission, but to talk about the start of the domestic leaps and bounds, it has to be this year. But in terms of maturity, Xiaobian will recommend toyota and Honda's two sets of hybrid technology, after all, there is a long period of practice to do the bottom. Although the Great Wall Lemon DHT gearbox has been on the market for a while, a short test drive does not represent durability, afraid of blowing too high, the more miserable the reality falls!