文档介绍：National Standard of the People’s Republic of China
Reliability Running Test Method For Automobiles
GB/T 12678-1990
1 Subject contents and scope of applicability
This standard specifies the reliability running test method for automobiles.
This standard is applicable to the reliability running test plete vehicle during type approval and quality evaluation of various automobiles.
2 Reference to standards
GB7031 Vehicle vibration: Describing method for road surface irregularity
GB/T 12534 Motor vehicles - General rules of road test method
3 Terms
Routine reliability test
Reliability test performed according to a standard under the conditions of highway and normal road.
Quick reliability test
Reliability test perform on the roads of the testing field with certain quick coefficient.
Maintenance after failure
Repair performed after the automobile has failure.
Preventive maintenance
Repair and maintenance performed according to the cycle and items specified by the automobile manual.
Potential failure
Failure that has occurred, but not yet discovered, or discovered in the process of preventive maintenance and overhaul inspection.
Equivalent failure number
The number of general failures converted from failures at various levels with certain coefficient according to their hazardness.
4 Testing conditions
Loading quality
The loading quality is specified according to Article 1 of Chapter 3 in GB/T12534.
Testing roads
Routine reliability testing road
Routine reliability testing road surface levels are according to the specificationsin Table 1 of GB7031.
Plain road
Road on plains and rolling terrains with the road surface smoothness of Level C or above, maximum gradient less than 5%, where the road surface is wide and straight,with good range of vision, and the automobile can keep driving at a high speed for a driving distance of more than 50km.
Bad road
Road with firm roadbed and uneven r