JB/T 50188-1999 This standard is a revision of JBn 3827-84 "Reliability and durability test methods for diesel engines for construction machinery". This standard specifies the reliability and durability test methods for diesel engines for construction machinery. This standard is applicable to diesel engines for construction machinery (including four-stroke, two-stroke; air-cooled, water-cooled; non-supercharged, supercharged and supercharged intercooled). The test of imported products should also comply with the requirements of the license. This standard was first issued in 1984. JB/T 50188-1999 Reliability and durability test methods for diesel engines for construction machinery JB/T50188-1999 standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T50188-1999
Diesel engines for construction machinery
Reliability and durability test methods
(Internal use)
Published on December 30, 1999
State Bureau of Machinery Industry
Implementation on June 1, 2000
151150188-1999
This standard is for B36?? 84: Revision of the "Test Method for the Rise and Endurance of Diesel Engines". Revision, editorial revision, main technical contents are standardization, this standard is for the test method of the durability of diesel engine performance for diesel engines, and the relevant regulations of BT1988 "Test Method for the Rise and Endurance of Diesel Engines" are adopted. This standard will replace the relevant standards 1B38?7-94 from the implementation date, and the Technical Committee of Standardization of the Standardization of Diesel Engines will propose the following standards. The drafting units of the standard are: Dajin "Dongguan Diesel Engine Research Institute", Shanghai Diesel Engine Co., Ltd., Guangxi Shangchai Machinery Co., Ltd. The main drafters are: Qiao Shan, Lao Qi, Wu Zhi, etc., the first release of 71984, [9999] the first revision scope || tt || Machinery Industry Standard of the People's Republic of China | |tt||Diesel Engines for Engineering Machinery
Reliability and Durability Test Methods
(Internal Use)
This standard specifies the reliability and durability tests and procedures for diesel engines for industrial and light machinery. JB/50188-199
Reference IBn3827-84
This standard applies to diesel engines for engineering machinery (including injection molding, two-stroke molding; air cooling, water cooling: non-turbocharged, submersible and turbocharged intercooler). The test and inspection of imported products shall also meet the requirements of the license. 2 Reliability and Durability Tests
2.1 Test Contents
Reliability and Durability Tests include bench and non-stress test, thermal shock test and matching use test. 2.2 Bench and Non-stress Tests and Durability Tests
2. 2.1 Test start
Perform a closed run according to the regulations of the manufacturer
6) Measure and record the relevant dimensions of the main parts according to the regulations of 2.5.3: c) Perform performance test: d) Perform endurance test on the platform
c) Perform endurance test on the platform
Re-issue the test items.
2.2 Test specifications
2.2.3.1 Endurance test of the platform shall be carried out in a cycle of 2 hours for a total of 1000 cycles. The test time is: 2000h, excluding the warm-up time and downtime maintenance time of test 1. The test method for automobile diesel engines has been used for endurance tests. The test engine with a target power higher than the power average power II shall be tested for 1000h according to the following specifications. 2.2.2.2 The test range of the test engine with a rated power of 1 shall be in accordance with the provisions of Table 1. ... 088-1999
The bench durability test specification for diesel engines marked as 1% average power shall be in accordance with the provisions of Table 2. Table 2 The bench durability test specification for diesel engines marked as block II
Maximum state speed
Standard speed
Maximum idle speed
Standing shock test
Standard flow rate as a percentage of the power
Power rate at maximum torquebZxz.net
Rate time
2.3. Water-cooled diesel engines shall also undergo thermal shock tests. The test shall be repeated for 3000 cycles per 10m. If the thermal shock test has been performed in accordance with the vehicle standard, it can be exempted. 2.1.2 The super shock test specification for diesel engines marked as low-power diesel engines shall be in accordance with the provisions of Table 3. Table 3 The dynamic shock test specification for diesel engines marked as 1% average power Range: in Rated speed Rated power percentage Rated power percentage Cold liquid outlet The test specification of diesel engine rated as power shall be in accordance with the provisions of Table 4. Table 4 Thermal shock test specification of diesel engine rated as power Rated speed Rated power percentage Rated power percentage Cold liquid outlet The test specification of diesel engine rated as power shall be in accordance with the provisions of Table 4. 1.4 Set of use test ... 2.5.1 During the reliability and durability test, the engine shall be regularly maintained according to the maintenance instructions. The number of engine maintenance and the damage of cooling parts shall be recorded in detail and written in the test report. 2.5.2 During the reliability and durability test, the engine shall be measured at least once every 4 hours: the engine oil consumption rate, intake air humidity, exhaust temperature, cooling filter temperature, engine oil temperature, engine oil consumption and engine oil consumption. 5.3 Before the endurance test, the engine shall be disassembled and measured, including: exhaust valve depression test, valve stem guide, connecting rod bushing, and valve stem guide. The main journal and connecting rod journal of the timing shaft, camshaft, cam and journal, tappet. Timing gear room gear system, jet pump cam and plug, measurement should be carried out after the parts are fixed for 24 hours, the inner diameter of the cylinder liner and the main shaft can be measured on site, and the dynamic gauges of the same material used for the exit are calibrated under the same mixing conditions. 2.6 Evaluation method for reliability
Fault-free operation period: The running time of the machine from the non-ore operation to the first stop (h) Average fault correction interval time
Total test hours
Number of machine failure stops
Total running time
Total running time + maintenance time + failure time: 21
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