Recently, GAC Trumpchi announced the full opening of the hybrid era, and officially released the brand name of the new hybrid technology under the electrification strategy - Julang Hybrid. Unlike other independent car brands that are currently mainly focused on a hybrid system, GAC Hybrid has two technical routes, namely the self-developed GMC dual motor series parallel hybrid system of Toyota's latest THS hybrid system, which can be said to be double insurance. So the question is, why does GAC not have to take the hybrid system authorized by Toyota, or do you have to develop a hybrid system?
Disadvantages of Toyota THS Hybrid
Toyota's hybrid system has a history of 20 years, although after the emergence of the dual motor series parallel hybrid, many car critics and netizens on the Internet began to criticize Toyota's hybrid system, but in fact, this hybrid system is absolutely quite excellent, before people said that there are only two kinds of hybrids in the world, one is Toyota, one is the other, there is definitely a reason.
Toyota's THS hybrid system is simply a power shunt hybrid system, through its unique patented E-CVT transmission, the power emitted by the engine will be divided into two on the planetary gear plate, part of which is directly transmitted to the output shaft to drive the vehicle, part of which is driven by the P1 motor through the planetary gear disc to the sun gear for power generation, and the electrical energy is transmitted to the P3 motor to converge to the output shaft.
Such a set of structure, it perfectly realizes the premise of mechanical transmission driving the wheels, so that the speed and torque of the engine are decoupled at the same time, and the high efficiency range of the engine is used to the greatest extent, in simple terms, this hybrid system is still based on the engine as the core, and the high efficiency of the engine is guaranteed to the greatest extent. At the same time, the hybrid system is still very stable, and in the 20 years since its introduction, there have been no other large-scale quality problems except for oil emulsification.
Toyota's THS hybrid is almost perfect, but this hybrid system has a flaw, that is, limited performance. If you look at Toyota's hybrid system model, even if the engine is piled up to 3.5 self-priming, is its zero hundred acceleration fast? In the previous era of internal combustion engines, Toyota's hybrid system was not inferior, but in today's era of motor drive, any pure electric model can run within 5 seconds.
Advantages of double motor series parallel hybridization
The disadvantage of Toyota THS hybrid is the reason why GAC wants to develop dual motor series parallel hybrid, GAC will definitely launch high-performance hybrid models in the future, otherwise it will be difficult to keep up with the footsteps of friends, so it is imperative to develop self-developed dual motor series parallel hybrid.
Moreover, Toyota's THS hybrid is still someone else's technology in the end, and the planetary gear structure in it still depends on Toyota's supply chain to provide, but the self-developed dual motor series parallel hybrid can be its own technology.
GAC's GMC dual-motor series parallel hybrid system consists of a 2.0ATK high-efficiency Atkinson engine, a second-generation two-speed GMC electromechanical coupling system, and a refrigerant direct cooling battery. The structure is roughly similar to the series parallel hybrids used by several other dual motors, but there are some differences in detail.
GAC 2.0ATK This efficient Atkinson engine can reach 42.1% thermal efficiency, which is currently relatively high in the hybrid special engine that has been mass-produced, BYD is 43%, Geely is also 43%, the Great Wall has not been announced, Chery claims that 45% has not yet been listed, only 37%. Therefore, the thermal efficiency of this engine is not low.
GMC electromechanical coupling system adopts integrated dual motor multi-stop DHT, the shift mechanism adopts the form of AT, and the addition of gear is to make the engine intervene in the driving area after being in a more efficient working range, Great Wall Geely and Chery are similar designs, but GAC uses the AT form shift mechanism, which can make the shift action more smooth.
According to the information given by the current manufacturers, the comprehensive average fuel consumption of the Shadow Leopard Hybrid Version is 3.6L, the zero hundred acceleration time is 7.3 seconds, the fuel economy and power performance are both balanced, and after mass production, it may become a highly competitive hybrid technology on the market.
At present, BYD Great Wall Geely and other car companies, have launched mass production of listed models, but GAC in this regard is undoubtedly a latecomer, this double-line operation, may still want to have more insurance, GAC has many times determined to become a car company with technical flow, relying on the double hybrid strategy, this time can it work? We'll see.