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Collision Safety Performance Tests

The evaluation method of a result

In order to test collision safety performance, we performed four tests; full-wrap frontal collision test, offset frontal collision test, side collision test and neck injury protection for rear-end collision performance test. The test vehicles consisted of 12 different models.
The results of these tests are reported using the pointmethods described below. Points are calculated for each test and an overall evaluation of collision safety performance is reported. The test vehicles of the brake performance tests consisted of 12 different models and the results are shown here.

Calculating points for full-wrap and offset frontal collision (front passenger's seat) tests

Injury values are measured on the dummy for the head, neck, chest, and legs. These values are then converted into a four-point score using a pointconversion function used for automobile assessment in the United States and Europe. Vehicle deformation is also measured and converted in the same manner to a score of 0 to - 1. The value for vehicle deformation is then subtracted from the value for injuries and the result is multiplied by the weight coefficient for this type of accident. In this manner, the overall points are calculated for each body area. These scores are then added together to get the total, which is then evaluated to one of 5 levels.


Calculating points for offset frontal collision (rear passenger's seat) test

As " Rear seat Passenger's Protection for Frontal Collision Performance Evaluation", injury values are measured on the dummy placed in the rear passenger's seat in the front passenger's seat side for the head, neck, chest, abdomen (right or wrong binding of pelvis by a seat belt) and legs. These values are then converted into a four-point score using a pointmethods conversion function used for automobile assessment in the United States and Europe in view of adjustment items. The result is multiplied by the weight coefficient for this type of accident. In this manner, the overall points are calculated for each body area. These scores are then added together to get the total, which is then evaluated to one of 5 levels.


Calculating points for the side collision test

Injury values are measured on the dummy for the head, chest, abdomen and pelvis. These values are then converted into a four-point score using a pointconversion function used for automobile assessment in the United States and Europe. These values are multiplied by the weight coefficient for this type of accident and the overall points are calculated for each body area. These scores are then added together to get the total, which is then evaluated to one of 5 levels.


Calculating points for neck injury protection for rear-end collision performance test

In order to evaluate injuries of dummy's neck, Neck Injury Criterion (NIC) as injury values to evaluate "neck's S-shaped deformation" which occurs head contacts to the head restraint (Phase 1) and neck load/moment as injury values to evaluate maximum headtilt after head contacts to the head restraint (Phase 2) are measured. These values are then converted into a four-point score using a point-conversion function used for automobile assessment in the United States and Europe. The result is multiplied by the weight coefficient for this type of accident. These scores are then added together to get the total, which is then evaluated to one of 4 levels.


Determining the overall collision safety performance evaluation

For the driver's seat, the results of the full-wrap frontal collision test, offset frontal collision test, and side collision test are added together and evaluated to 6 different levels.
For the Frontal passenger's seat, the results of the full-wrap frontal collision test and the side collision test (results for the driver's or the front passenger's seat are used) are added together and evaluated to 6 different levels.