1, NHTSA
NHTSA is referred to as the National Highway Traffic Safety Administration. National Highway Traffic Safety Administration (NHTSA) is the US government’s top auto safety authorities. As the authoritative agency of the US government vehicle safety supervision departments, are responsible to ensure that all types of vehicles must comply with the important responsibility of motor vehicle safety regulations. NHTSA mainly hit by determining the full two-way (front and side) Analog person to bear, carry out five-star vehicle safety assessment. Because of its authority and impartiality of the results of the annual assessment for the majority of consumers recognized not only in the United States, consumers on a global scale, but also to the results of this evaluation as the authoritative standard automobile purchases.
2, NHTSA vehicle safety evaluation system
40 km / h frontal barrier crash test
to make a reasonable assessment of the structure of the car.
Side impact test
When the vehicle is hit SUV, or pickup truck and other large vehicles from the side of the vehicle to protect the driver assessment.
rear impact / passenger’s head fixed protection test
When the vehicle is hit from the rear, the seat and a head protection detection fixed.
In 1978 the US National Highway Traffic Safety Administration (NHTSA) began domestic common vehicle collision test, its methods (FMVSS 208) is to test the car at a speed of 35mph in front crashed into a fixed barrier. The results are then published for consumers, and as an international information NCAP (NCAP) obtained in the United States.
today’s passenger cars designed to withstand more impact than ever before, largely due to the test.
success NCAP crash tests conducted showed that most of the new car in testing the difference is very small. But this does not mean that much impact resistance difference. Differences do exist. Increased collisionTest method also highlight these differences. Front side angle of the Insurance Institute for Highway Safety (IIHS) crash is one such test. The full width of the test and a test complementary offset collision, the full width of the test system constraints but demanding requirements of low vehicle structure, the opposite side corner collision.
full width of the front-end collision test – currently NHTSA and osa (Japan National Automotive Safety and Victim Assistance Organization) conducted full-width front-end collision using this method. And put on a dummy driver and front passenger seat, the vehicle 35mph (56 km / h) speed wide frontal crash hard cement walls, researchers then measured and evaluated may dummy head, chest and legs suffered damage.
In this test, the test dummy withstand a high deceleration force. This test is particularly suitable for seat belts and airbags evaluate occupant restraint system, but it does not evaluate the damage suffered by the vehicle itself. Full-width frontal crash rating: possibility of life-threatening injuries occurred.
NHTSA’s star ratings – – 1994 US National Highway Traffic Safety Administration (NHTSA) has changed the method of evaluating the performance of a frontal crash test, replacing the previous digital confusing law with a five-star rating assessment Act. We convert the full width of the front portion NHTSA crash test ratings for the respective colors, as shown.
Side Impact – 1996 NHTSA increase in side impact protection test, using 3,015 lbs crashed into the side of the driver pulley collision sitting, to simulate a typical intersection collisions.
and the frontal crash test as sled at a speed higher than the federal standard of 5mph – namely speed of 38.5mph and hit a car. We NHTSA side impact test ratings converted to the corresponding color in the following table. Test test ratings hit: the possibility of life-threatening injuries occur we will NHTSA crash tests before the full width of the part of the star into the corresponding color, as shown in the table.
angle of impact data – Annual statistics and sources of different makes are not the same, we will get data were averaged, then got the impact angle of the table, this table includes the impact of all types, not just limited to the fatal collision or a collision causing bodily harmhit.
US NCAP test methods need to be improved since the start of the crash test 23 years, NHTSA’s test method is almost unchanged. The main change is the addition of only the side impact test (using the Euro NCAP side impact test).
According to the international agency recently NCAP testing, full-width front-end collision tests did not show the effectiveness of the protection of the car’s safety cage compartment (Safety Cage) or occupant restraint system for a vehicle occupant when the real collision. Even the structure of vehicle performance is poor or unstable, NHTSA is also possible to test head and chest injuries rated as “good” (and get a better star ratings). In these cases, a slightly different environment or a slight increase in speed will greatly increase the risk of serious injury. In the United States, with mandatory air bags significantly altered the test results of most of the full width of the collision. For example, in the past few years, all vehicles NHTSA tests in the full width crash tests have been the lowest Samsung’s results. Because there is not much difference in the results, consumers distinguish these vehicles more difficult.
In summary, U.S. NCAP need more modern testing methods. Australia has abandoned the full-width test NHTSA began using the European NCAP (EEVS) method. American NCAP (NHTSA) should learn from the US Insurance Institute for Highway Safety or the European EEVS test system.