E-car original consumers are now paying more and more attention to the safety performance of vehicles, whether it is active safety or passive safety has become a factor that consumers must consider when buying a car, and these performance indicators will be planned in the early stage of vehicle design.
For the first time to build a medium-sized SUV in the 5-meter class, can GAC Trumpchi's second-generation GS8 still maintain high standards in terms of safety and quality? This time, I will take you to the production line of GAC Research Institute and the second generation GS8 to see how the engineers of Trumpchi's second generation GS8 considered its safety design when developing.
The second generation of GS8 is the first model developed based on the L platform of GPMA architecture, facing the global automotive market, designed in accordance with the highest standards of global automotive safety regulations, and has a modular expansion platform series of models to ensure that the platform expansion models meet the super five-star safety standards.
In order to create a super five-star safety standard and the most cost-effective body, GAC Trumpchi applied the self-developed all-forward parametric frame body technology to optimize the design of the body frame, defined the overall path of the body through multi-dimensional technologies such as topology optimization, parameterization and modularization, and "finely crafted" the key structure of the body to achieve the best balance between body safety, weight and other performance.
The second-generation GS8 also carried out detailed mechanical simulation analysis of various parts of the body during the development, so as to strengthen the rigidity of the body while reducing the weight of the body in white, and the mechanical simulation analysis can also optimize the direction of collision transmission and ensure the safety of the crew cabin. In the design of key structures such as the cabin and the front floor of the body, the "wooden zigzag" stabilizing force flow transmission structure is applied in many places to effectively ensure the stable and balanced transmission of the crash load in the body frame.
In the bottom collision test, the full positive collision acceleration is reduced by 15% compared with the previous generation model, and the intrusion of small bias collision is reduced by 60% compared with the previous generation model, and the safety performance is significantly improved.
Next, we look at the body-in-white body of the second-generation GS8, with the engine compartment in the front of the body as the energy absorption zone and the crew compartment at the rear.
The front anti-collision beam is made of aviation aluminum, which adopts the "eye-shaped" structure, which can effectively absorb the collision energy, and there is also an independent energy-absorbing box in the rear, reducing the maintenance cost after the collision.
In order to improve the energy absorption efficiency of the cabin and improve the structural stability, the second-generation GS8 connects the body and the lower front longitudinal beam through the double "triangle" shape and "mesh" shape structure, forming an "integrated" front longitudinal beam energy absorption system, which greatly improves the energy absorption efficiency of the body.
In the part close to the crew compartment, the "Feng" glyph-shaped four-way protection structure is adopted, and combined with 1500MPa thermoforming material, to ensure that the front part of the crew compartment is effectively resistant to intrusion in the frontal collision.
The connection between the A-pillar and the front sill of the body is also specially designed with an energy absorption zone, and through the design of the secondary "conductivity" protection structure and the application of 1180MPa ultra-high strength steel material, it avoids the intrusion of the wheels into the crew compartment in the event of a collision under harsh working conditions such as small bias collisions.
After talking about the energy absorption part of the front of the body, let's look at the protection area of the core of the second-generation GS8 crew compartment protection.
The occupant compartment where the occupants of the car are located adopts the "multi-faceted" ring cage protection frame to strengthen the design, and the application of ultra-high strength steel and thermoforming materials to strengthen it to achieve multi-dimensional "steel castle" protection of the crew compartment, namely: front door guard ring, rear door guard ring, A pillar guard ring, B pillar guard ring, C pillar guard ring, wind window guard ring, upper cover guard ring, lower plate guard ring, etc., and make full use of the anti-extrusion characteristics of the shape to ensure the rigidity of the crew compartment.
B-pillar reinforcement
Rear wheel cover reinforced
In addition to the application of ultra-high strength steel and thermoforming materials, in order to ensure the integrity of the crew compartment in the face of front or side collision as much as possible, the skeleton of the crew compartment is strengthened in key parts such as the B-pillar and the rear wheel cover, and composite reinforcement materials are added to improve the overall rigidity and structural balance of the body.
In the design of the floor, the second generation GS8 adopts multiple reinforcement measures, such as improving the anti-collision stability of the lower part of the crew compartment by increasing the front beam of the front floor; strengthening the front beam of the seat to avoid side collision with the lower part of the body intrusion, opening up and strengthening the middle passage, the rear of the front floor longitudinal beam to improve the integrity of the impact resistance structure, to ensure that the load force is gradually transmitted in the body, and effectively improve the rigidity, torsional resistance and stability of the vehicle.
Finally, we look at the rear of the body, the second generation of GS8 through the rear of the body transmission path, joints for full-dimensional optimization, the lower part of the C-pillar, rear suspension installation position and other key structures to strengthen, and the rear structure integrity of optimization, improve the vehicle rear structure balance and collision resistance, while improving the rear hard jog stiffness and body torsional stiffness.
The height of the entire white car is 65% of the steel, of which the ultra-high strength (≥980Mpa) accounts for about 22%, and the rigidity of the body is 25% higher than that of the previous generation.
The newly optimised body frame naturally brings greater safety, and in the crash test of the second-generation GS8, it has reached the latest CNCAP five-star and CIALISI "G" ratings.
After looking at the body-in-white, I will continue to take you to reveal how GAC Trumpchi ensures the quality of products and the performance related to the active safety of vehicles.
The second-generation GS8 was born in the Guangzhou plant of GAC Trumpchi, which can be said to be the base camp of Trumpchi, adjacent to the suppliers of GAC Research Institute, GAC Qisheng Power Company, GAC Toyota and GAC Honda, and has a complete R&D and supply chain system.
The first impression I made when I entered the workshop was unconventional, which was comparable to the workshop of the joint venture car company I had visited, and the standardized management could better ensure the quality of the vehicle.
In terms of stamped parts, GAC Trumpchi plant can achieve 100% self-production of appearance cover parts, and strictly control product quality.
In terms of high-strength steel applied to the body frame, hot-stamped ultra-high-strength steel is provided by the industry's biggest suppliers, and it is verified by the quality inspection system before use to ensure good products.
In the welding process, body flexible welding can be 100% automated, collecting 1 million real-time information per second to ensure the quality of body welding.
And the whole production system also draws on the quality management system of the joint venture brand, each completed process will be self-inspected, and will flow into the next production line after qualification to ensure the quality of each car.
In addition to working on the body hardware, the second-generation GS8 is equipped with larger and longer-lasting airbags.
The newly designed side air curtains of the second generation GS8 fully cover the head protection area of the drivers and occupants on both sides of the first, second and third rows, and the volume is 20L, covering as much as possible.
Not only that, the airbag can also hold the pressure for 6s, the general air bag will be deflated immediately after the explosion, and the pressure bag can provide better protection performance in the event of a secondary collision.
In the configuration of the seat belt, the second row of seats is also pre-tensioned and limited, and the seat belt is tightened first when the collision occurs to avoid a large displacement of the second row of passengers.
The top-mounted model of the second-generation GS8 fuel version, the Extreme Edition, is equipped with up to 22 sensors, including 12 parking radars, 4 panoramic cameras, 1 camera for lane assistance, and 5 millimeter wave radars, which can achieve 27 active safety assistance functions.
Including: 540 ° panoramic image (including transparent chassis), traffic sign recognition, speed limit assist, collision warning, automatic braking, lane keeping, lane departure warning, congestion follow-up, blind spot monitoring, door opening warning, rear pedestrian passing brake assist, rear vehicle travel warning, front vehicle crossing warning, automatic parking, high-speed automatic lane change and so on.
Even the models that are not equipped with the top are equipped with 18 sensors, including 12 parking radars, 4 panoramic cameras, 1 lane assistance camera, and 1 millimeter wave radar.
Write at the end
The second generation of GS8 puts vehicle safety in the first place, using new technologies and processes to achieve rigid improvement, to ensure the safety of the crew compartment, and in the manufacture of vehicles, strict production management and quality inspection also ensure that each car has the same safety performance, coupled with a more comprehensive active safety assistance function, which can make consumers feel at ease when buying a car.
Want to know more long test sharing, welcome to pay attention to Station B [Drive It Brothers]!