With the blooming of self-owned brand hybrid technology, each brand has its own magic power. Among the many hybrid technologies in the market, the hybrid system with dual motors and 2-speed transmission mechanism is considered to be a relatively balanced model, which can give better consideration to power performance and fuel economy, and at the same time, the cost can be effectively controlled.
At present, the brands that use the hybrid system of 2-speed transmission mechanism are not only the Great Wall DHT hybrid system, but also the hybrid GMC2.0 hybrid system of Guangzhou Automobile Chuanqi Julang. So what's the difference between the two? Below I will make a detailed comparative analysis of them to help you better understand these two systems.
First, let's look at the composition of the two systems. Julang hybrid GMC2.0 hybrid system consists of 2.0ATK hybrid engine +GMC2.0 electromechanical coupling system, in which the electromechanical coupling system consists of two motors plus 2AT transmission mechanism (P 1+2AT+P3).
This is also recognized as a relatively balanced two-speed hybrid power form, and its shift mechanism is still in the form of at automatic gearbox, which is helpful to improve the ride comfort of power output.
Great wall 1.5T intelligent DHT hybrid system consists of 1.5T engine, generator, drive motor, power battery and two-speed transmission. The system has clear division of labor and clear working logic.
However, although the structure of the two is similar, there is no small difference in the level of technical reserves.
Julang hybrid GMC2.0 hybrid system has more than 400 core patents (invention patents account for 57%) and more than 740 extended patents, breaking the patent barriers of international automobile giants and mastering independent intellectual property rights.
Great Wall "lemon hybrid DHT" system has accumulated 199 patents, including 80 core patents.
For the hybrid power system, how to maximize the fuel economy of the engine is an important proposition.
Julang hybrid GMC2.0 hybrid system is equipped with a 2.0ATK high-efficiency Atkinson engine specially built for hybrid power.
In addition to Atkinson cycle technology, this 2.0ATK engine is also equipped with fast and accurate electric intake VVT, and the mechanical compression ratio is increased to 15.6. At the same time, with advanced technologies such as GAC GCCS high-efficiency combustion system, 350bar high-pressure direct injection system, low-friction design and intelligent thermal management, the thermal efficiency of the engine has reached 42. 1%, which is undoubtedly the best among 2.0 self-priming engines.
Ultra-high engine thermal efficiency has laid a good foundation for fuel economy, while improving performance output and reducing power loss are still important links.
Therefore, GAC Chuanqi 2.0ATK engine also adopts EGR exhaust gas recirculation system. By cooling the external EGR catalyst at low temperature, the intake air temperature is reduced, the knocking tendency is improved, and the combustion is more complete.
At the same time, GAC Chuanqi 2.0ATK engine also adopts accessory-free gear train design, and the crankshaft pulley is built in the engine to reduce the friction loss of shaft seal and gear train loss. It is worth mentioning that this engine is equipped with an advanced electronically controlled variable oil pump, which can accurately control the oil pressure and reduce the energy consumption loss of the engine.
All these measures make the performance of Guangzhou Automobile Chuanqi 2.0ATK engine fully used in the cutting edge, and minimize the loss. The measured fuel saving rate under WLTC conditions reaches 4%.
The Great Wall Lemon DHT hybrid system is equipped with a 1.5T turbocharged engine for mid-to high-end models. Miller cycle design and VGT variable cross-section turbine technology can improve turbine hysteresis, thus improving low torque performance.
However, in terms of performance, the 1.5T engine of Great Wall Lemon DHT is not particularly outstanding. The maximum net power of the engine is 1 12kW, the maximum net torque is 232n·m, the thermal efficiency is only 38%, and the control of fuel economy is not in place.
Comparatively speaking, the 42. 1% thermal efficiency of GAC Chuanqi 2.0ATK engine is one order of magnitude higher than that of the 1.5T turbocharged engine of Great Wall Lemon DHT hybrid system, which is more conducive to the pursuit of lower fuel consumption.
Julang hybrid GMC2.0 electromechanical coupling system is the first integrated dual-motor multi-gear DHT. The 2AT transmission mechanism added between the two motors can improve the torque output of the engine at low speed under high-speed road conditions, and at the same time, the engine can be in a more efficient working range after participating in driving, with lower energy consumption and stronger power.
In fact, the electromechanical coupling system of Julang hybrid GMC2.0 can make the thermal efficiency utilization ratio of the hybrid system of the engine under WLTC working conditions ≥95.5%, ensure that the engine works in the best area under different working conditions, and at the same time efficiently couple the power of the engine and the motor to the wheels to keep the system running efficiently at all times.
In addition, the Julang hybrid GMC2.0 hybrid power system is equipped with a full-speed intelligent energy management strategy, which can intervene and optimize the working state of the existing power system in advance through real-time road conditions and traffic flow information such as vehicle navigation and high-precision maps. For example, in the scene of road congestion, the vehicle can adjust the power scheme in real time according to the congestion degree, reduce the engine intervention under the congestion condition, and improve the driving comfort and economy of users in the actual congested roads.
It is worth mentioning that the Julang hybrid GMC2.0 hybrid system also adopts the same high-efficiency refrigerant direct cooling battery technology as BMW, and directly introduces air conditioning refrigerant into the battery to realize direct cooling. Compared with liquid cooling technology, the intermediate heat exchanger is eliminated, and the cooling efficiency is higher. At the same time, the cost of the whole vehicle is lower (the cooling energy consumption is reduced by 22.5%, and the cooling efficiency is increased by 65,438+000%), so that the battery can achieve all-weather high-efficiency and high-power output.
The lemon hybrid DHT of Great Wall is also a two-speed hybrid form, and its DHT system is mainly composed of two motors and a fixed-axis gearbox, while the generator and driving motor are connected to the engine through the fixed-axis gearbox and multiple clutches.
The two gears of the Great Wall DHT hybrid system are only effective when the engine is directly driven. Its main function is to broaden the speed range of engine direct drive, so that the engine can be in a more efficient working range after intervention drive.
Written at the end: From the above comparison, it can be seen that the giant wave hybrid GMC2.0 hybrid system and the Great Wall lemon DHT hybrid system are basically the same in structure, but the GMC2.0 hybrid system achieves an ultra-high thermal efficiency of 42. 1% through a more efficient 2.0ATK engine.
At the same time, the electromechanical coupling system of Julang hybrid GMC2.0 can make the thermal efficiency utilization ratio of the hybrid system of the engine under WLTC working condition ≥95.5% through full-speed intelligent energy management strategy and high-efficiency refrigerant direct cooling battery technology, which makes the fuel economy better.
In addition, in terms of quality, Julang hybrid GMC2.0 hybrid system passed the reliability verification of 10g vibration acceleration for the first time in the industry, and the cumulative bench verification exceeded100000 hours, and the equivalent mileage of vehicle verification reached100000 kilometers, covering cold, high temperature, plateau, high humidity, high corrosion (salt fog), mountainous areas, sandstorms and other ".
Later, we will also bring the test drive and in-depth test content of GAC Chuanqi hybrid vehicles. You might as well pay attention to my easy car number, Xi 'an Ye Zhan, or search for miles and miles, and pay attention to the driver.