National Standard of the People’s Republic of China
Motor Vehicles Durability Running Test Method
1 Subject contents and scope of applicability
This standard specifies the motor vehicles durability running test method
This standard is applicable to motor vehicles in bulk production (for reference of mininig dump truck in implementation).
2 Reference to standards
GB/T12534 Motor vehicles - General rules of road test method
GB/T12545 Motor vehicles-Fuel consumption test method
GB/T12548 Motor vehicles-Speedometer and odometer inspection and calibration method
GB/T12678 Motor Vehicles Durability Running Test Method
JB3743 Motor vehicles engine performance test method
3.1 Motor vehicles durability
Refers to the capability of motor vehicles plete the function when reaching certain technical or economic index limits under the specified application and maintenance conditions.
3.2 Motor vehicles durable rate
Refers to probability when the motor vehicles can reach the predefined first overhaul milage under the specified application and maintenance conditions without damage to the durability.
3.3 Damage to motor vehicles durability
Means the fatigue damage of ponents has e abnormally frequent; abrasion exceeds the limit value; corrosion and aging of materials, main technical performances of vehicles decrease and exceed the specified limit value; the maintenance costs keep increasing, and have reached a level which is economically irrational or the safety cannot be guaranteed for further use, and the result is to replace the main assembly or perform overhaul with the vehicle.
4 Test conditions
As per GB/T12678.
5 Test vehicles
5.1 Vehicle quantity used for vehicle durability running test is confirmed as per Table 2.
5.2 This test can use the same group of vehicles for vehicle application test, and routine reliability test.
5.3 The manufacturing, assembly, adjustment quality plete car and various assemblies and parts should conform to the specifications of technical conditions of the vehicle.
6 Test items and method
6.1 Test purpose
Test procedure is performed according to Table 1.
Table 1 Durability Running Test Procedure
Inspection of test vehicles, running-in
Engine performance preliminary
First precision measurement of vehicle’s main parts
300km running-in after reassembling the vehicle
Oil consumption measurement (preliminary test)
Vehicle performance preliminary
Durability running test
Engine performance secondary test
Oil consumption measurement (secondary test)
Vehicle performance secondary test
Secondary precision test of vehicle’s main parts
Reassemble vehicle, and prepare test report
Note:① The order of the items normally cannot be freely changed
② When application test or routine reliability test is arranged together with vehi