As a Chinese brand that is rapidly, after more than ten years of technology, Great Wall Motors finally made breakthroughs in the dynamic assembly research and development and manufacturing, extending their own technologies to the core of the vehicle.
1 thickness
From the integrated joint venture brand automobile technology to completely develop car core components, Great Wall cars have taken more than ten years on this road. This is also an advanced car company to experience, "plagiarism" and "learn" as progressive Yes, master core technology is the key to life for a long time.
In the early years, the Great Wall Motor can only rely on the application of the old technology to apply the old technology. After completing the "thickness", the 1.5GDIT engine + 7DCT transmission of the new Haval H6 means Great Wall The beginning of "thin hair".
Last year, the 1.5T engine of the Great Wall Automobile was awarded the "China Heart" 2017 Top Ten Engine Title, and the seven-stage wet double-clutch alternate with independently developed is the title of "World Ten Transmission".
2 The road of independent innovation
Different from learning imitation and mergers and acquisitions to obtain advanced technology, Great Wall Motors use independent innovation roads. Mr. Zheng Lipeng, deputy general manager and project director and project director of the Great Wall Automobile Transmission, said: "From GW4G15B + 6At to GW4B15 + 7DCT, it is not a simple power upgrade, but from the innovation of the EG platform to the new EB platform, the power assembly is more embodied. A comprehensive change of development concept. "
The 1.5T engine code for the GW4B15 compared to the Great Wall old 1.5T engine is not only the power improvement, but the biggest change is the first application of CVVL (continuous variable valve lift control) technology. This is the first application in China's brand engine. This technology has obvious help for reducing fuel consumption, enhancing engine work efficiency, in new Haval H6, the application of this technology can reduce 8.4% fuel consumption.
3 related technologies
This engine has achieved 92 invention patents, most of which are related to CVVL technology.
In terms of gearbox, the 7-stage dual-clutch speed box developed by Great Wall has adopted integrated design, high lightweight level, excellent NVH performance, and can be applied to most models. Ultra-high drive efficiency greater than 95% is the largest highlight of this gearbox.
Great Wall new and old 1.5T engine contrast
engine model
GW4B15 (new 1.5T)
GW4G15B (old 1.5T)
Fuel supply
Cylinder direct injection
Manifold jet
Valve timing system
Invasive airborne door can be changed
Exhaust door can be changed
Valve lift system
Inlet valve
-
Maximum power (kW / rpm)
124 / 5000-5600
110/5600
Maximum torque (nm / rpm)
285/1400-3000rpm
210 / 2000-4500
Great Wall New 1.5T engine comparison
brand
Great Wall 1.5T engine
SAIC 1.5T engine
Chery 1.5T engine
Mount model
Haval H6
Roewe RX5
Ruihu 7
engine model
GW4B15
15e4e
SQRE4T15B
Maximum power (kW / rpm)
124 / 5000-5600
124/5600
108/5500
Maximum torque (nm / rpm)
285 / 1400-3000
250 / 1700-4400
210 / 1750-4000
From a comparison form, the Great Wall New 1.5GDIT engine and its own old 1.5T engine have improved very obvious. Compared with other brands, the Great Wall New 1.5GDIT engine has a certain advantage in power output, especially in the maximum torque, but we can also find that its maximum torque output platform is relatively narrow.
The maximum torque output platform of the Great Wall 1.5GDit engine ranges from 1400 rpm-3000 rpm, the entire range width is 1600 rpm, in contrast, the two engine maximum torque output platform should be wider, Chery Tiger 7 output interval is minimal, but also reaches 2250 rpm. The maximum torque output platform is narrower is inadequate, but its lower maximum torque starting speed is specialized for China's driving environment.
Dual VVT, Cylinder Cylinder Head Independent Cooling, Variable Displacement Machine Oil Pump, Integrated Exhaust Manifold, Electronic Disposal Voltage Valve, Cylinder Direct Junction, etc. For this era, especially for small displacement turbines The boost engine is already a more common technology, and the mainstream engine has been related to the related art. Relatively speaking, the dual injection system, the valve lift variable, etc. is a higher level of technology, limited to cost, technical research and development level, etc. At present, there are few domestic-brand engine related technical applications, and the Great Wall 1.5GDIT engine is equipped with CVVL The variable valve lift system can be described as a primary river that is powered by the Chinese brand engine. Read more
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