What are the evaluation indexes of automobile reliability testing?

Reliability is an index to evaluate the comprehensive performance of automobile technology. The reliability of automobile refers to the ability to complete the specified functions under the specified conditions of use and within the specified journey. The reliability of a car depends on the inherent reliability of the car itself and the level of use and maintenance of the car, which is related to the use conditions of the car. With the increase of automobile service time, the possibility of failure increases and the reliability decreases. If the maintenance of a car starts from the time when the car starts driving and ends at the time when it works until T, time T is called the maintenance period. Before reaching the maintenance cycle, the possibility of automobile failure increases, and after maintenance, the technical performance of the automobile is restored to a certain extent. After long-term use and repeated maintenance, the technical performance of a car will obviously decline. At this time, only through repair can the technical performance be greatly improved. When the car is used to the limit state, it will reach the limit mileage of the car accordingly. It can be seen that automobile maintenance can only maintain the technical condition of the automobile to a certain extent and improve the reliability of use, but can not completely restore its inherent reliability level. So the car will be scrapped after driving a considerable number of miles (that is, when it reaches the limit mileage). The evaluation indicators of reliability are as follows. (1) Average first failure mileage. (2) The average trouble-free mileage. (3) Equivalent failure rate.