Depth Analysis | What do we need to know about car seat design?

Updated:04-08-2016
Summary:

Designing the seat is the first step in car design No k […]

Designing the seat is the first step in car design

No kidding, in all car designs, the first step for designers is to determine the design of the seat. To be precise, the designer's first consideration is the sitting posture of the members of the car. For SUV models, the driver's sitting position will be more upright and the position will be higher; for the car, the driver's sitting position will be much lower and slightly reclined; for some cars (such as equations of all levels) The driver is actually "lying" in the car. The reason why the seat should be designed first is that after the driver's sitting position is determined, the seat can be designed according to the H point of the human body, including position, shape, thickness, adjustable angle and the like. Only after the sitting position is determined, the positions of the steering wheel, pedal, center console, door, etc. can be finalized.

In order to design a comfortable seat, it is definitely not possible to rely on various concepts to support. It is important to know the specific human body data. In general, designers use the human body percentage template for reference. In other words, the designed seat allows a percentage of people to ride normally. This sounds simple. If you look at the picture, you know that the seat design is complicated:

The spine of the human body is naturally S-shaped, and therefore the seat back is designed to have a concave shape in the upper half and a protruding shape in the lower half. In general, in order to make people sit more comfortable, the seat should have strong support for the upper part of the chest, the middle and upper part of the back, and the lower part of the lumbar vertebrae.

Don't think that seat comfort means that you won't be tired for a long time. In fact, another problem to be solved when designing the seat is to cope with acceleration. For the car, whether it is a sudden acceleration or a sharp turn, its longitudinal or lateral acceleration can reach 0.7G and 0.8G. Therefore, in addition to having a certain lateral support, the seat restricts the movement of the driver's body back and forth, while at the same time eliminating the discomfort of the members of the vehicle in the state of synthetic acceleration.

The general seat consists of the surface material, the filler, the skeleton, the adjustment device and the body connection. Although not seemingly complicated, due to the extremely high frequency of use of the seat and its safety, each part must be designed with safety and durability in mind. Therefore, the development cycle of the seat is very long, basically synchronized with the whole vehicle. The engineer told me that in terms of bracelet-type seats, the development cycle is about 2 years.

Seat is an important safety component, and its performance is determined by factors such as skeleton, material and style. These are extremely professional content, require the accumulation of data and development experience, and also require professional laboratory verification facilities and technology. From the current technology and experience of Chinese designers and engineers, it is indeed a difficult process to completely develop the seat. It is said that China does not currently have the strength to independently develop seats.

 

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