At last year's Guangzhou Auto Show, Gu Chunshan, director of Chery Automobile Powertrain Technology Center, once said that in the future, Chery will launch three power options: 1.5T+ weakly mixed 48V, a new generation of 2.TGDI engine and a hybrid version of 1.5TGDI+ hybrid special gearbox DHT, which will form a high-low match with the 1.6TGDI engine. In 22, Chery has successively updated and introduced several models, and the hybrid system has become the main competition point, which is more fuel-efficient than traditional fuel vehicles.
compare us with technology, which appeared some time ago? According to the declaration of the hybrid version of the Tiggo 8, although the appearance of the car has not been greatly changed, the "hybrid" logo has been added at the tail, which is the assembly of the 1.5TGDI+ hybrid special gearbox DHT newly developed by Chery. The third generation 1.5TGDI has two versions of high and low power, the low power version is 13kw, and the peak torque is 26Nm；; The high-power version is 14kw with a peak torque of 285Nm. The most important thing is the DHT hybrid special gearbox, which can support pure electric drive, extended range mode drive, parallel mode drive, engine direct drive mode, etc., and Chery Automobile has developed it.
Chery has developed a DHT gearbox. It is reported that the plug-in hybrid gearbox has three power sources, which can form 1 combined gears, and the maximum input torque is 51Nm. The simple understanding is that the generator is integrated into the gearbox. The integration of motor and automatic transmission requires technical input, and the mechanical structure is simplified while reducing the number of transmission gears to improve efficiency. Chery's hybrid system is good, but there are some differences between Toyota's THS and Honda's i-MMD.
There is a difference between plugged-in and unplugged. Toyota's THS can be said to be "the legendary swordsman" in unplugged field, and now Honda's i-MMD is also widely harvesting fans. From a technical point of view, the concept of hybrid is not limited to whether it is plugged in or not. Two or more power reserves can be called hybrid. The biggest problem of plug-in hybrid is that the performance is greatly reduced after feeding, and the fuel consumption will also be greatly improved. The unplugged hybrid system can coordinate the work of motor, battery and generator, and ensure the sufficient battery power.
At present, new energy vehicles are very popular. The THS system of Toyota is not new. As early as 1997, this hybrid technology of oil and electricity was applied to Prius models. THS system is composed of two motors, a planetary gear and a clutch. Under the coordination of planetary gears, different cooperation between motor and engine is realized. Simply put, Toyota hybrid ECVT has no steel belt, not friction transmission, but gear transmission. ECVT realizes stepless speed change through the cooperation of a group of planetary gears and two motors. Toyota's patented technology, relying on technical barriers, has become the king in the field of unplugged hybrid.
Honda, a Japanese technology giant, also has a hybrid system, which quickly narrows the gap with Toyota by virtue of the advantages of i-MMD. What is admirable for Honda is that it bypasses the planetary gear mechanism and is replaced by a multi-disc clutch mechanism, and its fuel consumption level is not much different from that of Toyota THS. In addition, Honda hybrid is equipped with a more powerful motor and a larger battery, so Honda hybrid is more energetic to drive. At present, Honda i-MMD system has been deployed to mainstream hot-selling models.
domestic cars are improving, but it will take some time to surpass them.
This article comes from the author of Chejia, car home, and does not represent car home's standpoint.