GB/T 3871.10-1993 Test methods for agricultural wheeled and crawler tractors Part 10: Low temperature starting test GB/T3871.10-1993 Standard download decompression password: www.bzxz.net

UDC531.371 629.114.2
National Standard of the People's Republic of China
GB/T 3871. 1~3871. 1293
Test methods for agricultural wheeled and tracklaving tractors1993-03-03 Issued
1993.10-01 Issued
National Standard of the People's Republic of China
Test methods for agricultural wheeled and tracklaving tractorsPart 10:Low temperature starting test
Tes1 methods for agricultural heeled and tracklaying tractorsPart 10:Low temperature starting test 1 Subject content and scope of application
This standard specifies the test method for the low temperature start of agricultural wheeled and belted tractors. E/T3871.10-93
GB3871-85
The standard applies to the low temperature start test of wheeled and belted tractors with central starting. The low temperature start test of other types of tractors can be used in conjunction with it.
2 Reference standards
GB387:.1 Test methods for agricultural wheeled and belted tractors Part 1 General requirements 3 Terminology
3.1 Cold start limit
The lowest ambient temperature at which the auxiliary starting device and auxiliary energy can be started 3.2 Auxiliary starting time
The duration from the moment when the engine crankshaft is activated and the auxiliary starting device is driven. 3.3 Drag time
is the continuation of the time from the start of the engine to the time when the engine starts to run and stops being driven. 3.4 Starting speed
is the minimum drag speed at which the starter drives the engine to rotate and enables the engine to run. 4 Test instruments and equipment and measurement accuracy 4.1 Test instruments and equipment
must include: low temperature test measuring equipment, recorder, ammeter, voltmeter, tachometer, timer, steel tape measure and atmospheric pressure gauge, etc.
4.2 Parameters: pressure accuracy
The requirements are as follows: time 9.25, temperature +0.5±11.1%, current ±1.0, speed ±0.02kPa.
5 Test conditions
5.1 The technical status of the tested tensile machine and the test requirements shall comply with the relevant provisions of GB3671.1. 5.2 Before the test, use appropriate lubricating oil and coolant under the test temperature. Start and run the engine at temperature and wait until the engine reaches normal condition. The following procedures should be followed: a. Turn off the fuel, lubricating oil and coolant in the vehicle and replace them with clean ones; b. Clean the engine and replace them with suitable ones; c. Use appropriate fuel, lubricating oil and coolant under the test temperature. During the test, start the engine to make sure that all systems are working normally. 5 3 The placement positions of the temperature sensors are as follows: 5.3.1 Ambient temperature: At the end of the engine, at a height of 1.511, approximately 1.5 meters from the ground, the ambient temperature is measured at the following location: 532 Fuel standard: The oil depth in the tractor fuel adjustment chart is half: 5-3-3 Engine lubrication level: At the depth of - half of the engine or expansion oil pan: 5.3.4 Cooling temperature: The liquid level in the water tank on the engine radiator is at a depth of one-half! For air-cooled engines, the manufacturer shall reduce the temperature of the engine to a specified point. At the beginning of each test, the vehicle shall be fully charged. Before or after each test, the battery can be replaced with a fully charged spare battery of the same type, or the battery on the tractor can be removed from the environment and then continue to work. However, the battery can be kept at the test temperature for a long time to allow the battery to cool down. 5.5 Half of the engine is necessary for the operation of the engine, and the driver can cut off the power without the need for power off. For example, the air compressor, air conditioner, etc. should be disconnected. If it is not clear whether it can be turned on temporarily, make it run under the minimum load. 5.6 When the low-benefit test is carried out, the engine should be tested in the air pipe. The pump should be placed in the air pipe. The pump should be placed in the air pipe. The tester should put the variable control in the low-flow prison and cool down the test equipment after the test is completed. The test time should be kept at a predetermined time until the test is "through". The temperature difference between the measured temperatures at various locations should not exceed 1.5 °C. 6.? The engine throttle is set to the maximum operating position. The control panel is lowered and the starting function is determined according to the specification. The starting function is set on the standard machine (the starting system must be equipped with a heater, etc., and no external horsepower is allowed to be added). If an auxiliary part is opened, the start-up is considered successful and the starting failure is considered to be less than 1. After the start, the test accuracy is finally reduced by 5 times. The above test can be continued each time. The starting temperature will be 6 as the starting and last test accuracy of the test. The machine can be manufactured! "Over a certain temperature range, the test results and test conditions shall be recorded in the test result summary table, and a single performance test report shall be written in accordance with the relevant provisions of GB371.1. For each test temperature range, if the start fails after multiple attempts, if the start is successful, only a single test result will be recorded twice: Attached is the micro-limit cold start benefit range test success and the start that failed below the recovery temperature. Process curve diagram.6
Wu battery: plastic number
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optimal diameter production parameters: available space. Leading ruler in [mm>: length can reach the lowest temperature
oil test and
combustion: oil number
lubricating oil: god number
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test station results
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each format,
attachment area: start process curve diagram
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additional instructions,
GB/T 381.10
Summary table of low-mix dynamic test results
Test system
Gas path
Overvoltage
This standard was proposed by the Ministry of Machinery and Electronics Industry of the People's Republic of China, and was drafted by the Jinhuishi Machinery Standardization Technical Committee Ah
Starting Electric Chaos
This standard was issued by the Machinery and Electronics Industry Ministry Yang Tractor Research Institute. This standard is the responsibility of Qian Bu. Zhang Jida, starting electric
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