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QC/T 1095-2018 PDF in English


QC/T 1095-2018 (QC/T1095-2018, QCT 1095-2018, QCT1095-2018)
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QC/T 1095-2018: PDF in English (QCT 1095-2018)

QC/T 1095-2018 QC AUTOMOBILE INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.40 T 24 Performance requirements and bench test methods of motor vehicle assist vacuum pump ISSUED ON: JULY 04, 2018 IMPLEMENTED ON: JANUARY 01, 2019 Issued by: Ministry of Industry and Information Technology of PRC Table of Contents Foreword ... 5  1 Scope ... 6  2 Normative references ... 6  3 Terms and definitions ... 6  4 Performance requirements ... 7  5 Test-related requirements ... 10  6 Test method ... 12  Annex: Number, standard name, implementation date of 11 automotive industry standards No. Standard No. Standard name Replaced standard number Date of implementation 101 QC/T 645- 2018 Tow truck QC/T 645-2005 2019-01-01 102 QC/T 1094- 2018 General specification of lithium ion batteries for motorcycle starting 2019-01-01 103 QC/T 1095- 2018 Performance requirements and bench test methods of motor vehicle assist vacuum pump 2019-01-01 104 QC/T 788- 2018 Performance requirements and bench test methods of automobile pedal device QC/T 788-2007 2019-01-01 105 QC/T 311- 2018 Performance requirements and bench test methods of motor vehicle brake master cylinder QC/T 311-2008 2019-01-01 106 QC/T 564- 2018 Performance requirements and test methods for passenger car service brake QC/T 564-2008 2019-01-01 107 QC/T 1096- 2018 Bench test methods of fatigue life for torsion beam rear axle of passenger cars 2019-01-01 108 QC/T 1097- 2018 Bench test methods of fatigue life for front axle horizontal module of passenger cars 2019-01-01 109 QC/T 491- 2018 Automobile shock absorber technique requirements and test methods QC/T 491-1999 QC/T 545-1999 2019-01-01 110 QC/T 1098- 2018 Technical specification for powder metallurgy hub used in automotive clutch 2019-01-01 111 QC/T 1099- 2018 Specification for collapsible spacer used in automotive drive head assembly 2019-01-01 Performance requirements and bench test methods of motor vehicle assist vacuum pump 1 Scope 1.1 This standard specifies the terms and definitions, performance requirements, test-related requirements, test methods of assist vacuum pumps used in automotive hydraulic brake systems. 1.2 This standard applies to electric vacuum pumps, that provide assist vacuum pressure for vacuum booster servo devices, in automotive hydraulic brake systems. 1.3 This standard does not apply to independent electric vacuum pumps. 2 Normative references The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 4942.1-2006 Degrees of protection provided by the integral design of rotating electrical machined (IP code) - Classification GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests GB/T 10587 Specifications for salt mist testing chambers GB/T 18655-2010 Vehicles boats and internal combustion engines - Radio disturbance characteristics - Limits and methods of measurement for the protection of on-board receivers 3 Terms and definitions The following terms and definitions apply to this standard. 3.1 Assist vacuum pump shall meet the requirements specified in Table 1. 4.3.3 Resistance to mechanical vibration shock After the mechanical vibration shock test, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4 Environmental performance 4.4.1 Alternative high-low temperature performance After the test according to 6.4.1, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4.2 Heat resistance at high temperature After the test according to 6.4.2, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4.3 Storage at high and low temperature After the test according to 6.4.3, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4.4 Working performance in damp heat environment After the test according to 6.4.4, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4.5 Constant temperature and humidity storage performance After the test according to 6.4.5, the evacuation air time, at room temperature, shall meet the requirements specified in Table 1. 4.4.6 Degree of protection 4.4.6.1 The degree of protection of the sample shall not be lower than IP55, which is specified in GB/T 4942.1-2006. 4.4.6.2 After the dustproof and waterproof performance test, the evacuation air time, at normal temperature, shall meet the requirements specified in Table 1. 4.5 Corrosion resistance 4.5.1 Salt spray corrosion resistance After the test according to 6.5.1, the corrosion resistance of the sample shall meet the requirements specified in Table 3. The evacuation air time, at normal temperature, shall meet the requirements specified in Table 1. 6.1.2.2.1 The installation of test sample, the related pipeline, the circuit connections are the same as 6.1.2.1.1. 6.1.2.2.2 Set the test temperature of the high-low temperature test chamber to -40 °C ± 2 °C. Start the high-low temperature test chamber. After reaching the specified temperature, place it at this temperature for another 2 hours. THEN, when the initial pressure, in the vacuum tank, is the standard atmospheric pressure, start the assist vacuum pump, until the maximum vacuum is reached. Then close the assist vacuum pump. Measure and record the time to reach the vacuum, which is specified in Table 1, during the test, as well as the maximum working current within 100 ms after starting, AND the working current after starting for 400 ms. 6.1.2.3 High temperature performance Except that the temperature of the high-low test chamber is 100 °C ± 2 °C, the rest is the same as 6.1.2.2. 6.1.2.4 Single continuous working time 6.1.2.4.1 The installation of tested sample, pipeline, circuit connections are the same as in 6.1.2.1.1. 6.1.2.4.2 The initial vacuum pressure in the vacuum tank is set to 35 ~ 45 kPa. 6.1.2.4.3 Start the assist vacuum pump. Turn off the vacuum pump, after 60 s of continuous operation. During the test, the pressure in the vacuum tank shall be kept within the range of 35 ~ 45 kPa. 6.1.2.4.4 After the test, perform the normal temperature performance test according to 6.1.2.1. 6.2 Electrical performance 6.2.1 Overvoltage 6.2.1.1 The installation of tested sample, pipeline, circuit connections are the same as in 6.1.2.1.1. 6.2.1.2 Carry out the test according to the test conditions specified in Table 5. After the test, carry out the normal temperature performance test, according to 6.1.2.1. 6.3.3.3 After the test is over, carry out the normal temperature performance test, according to 6.1.2.1. Disassemble the sample, if necessary. Record the status of the sample. 6.4 Environmental performance 6.4.1 Alternative high and low temperature performance 6.4.1.1 Seal the air extraction port of the sample. Place the sample in a high temperature test chamber, which has an ambient temperature of 100 °C ± 2 °C, in the vertical direction, for 1 h. Then place the sample in a low temperature test chamber, which has an ambient temperature of -40 °C ± 2 °C, for 1 h. This forms 1 test cycle; totally 100 cycles are performed. The switching time between the two temperatures shall not exceed 10 s. 6.4.1.2 After the test, perform the normal temperature performance test, according to 6.1.2.1. 6.4.2 High temperature heat resistance 6.4.2.1 Install the sample in the temperature test chamber, according to the actual vehicle installation state. Connect the relevant pipelines and circuits. Carry out the test, according to the test conditions specified in Table 11. 6.4.2.2 After the test, perform the normal temperature performance test, according to 6.1.2.1. 6.4.3 High and low temperature storage 6.4.3.1 Fix the sample, in the vertical direction, in a high-low temperature chamber. Place it at ambient temperature of 120 °C ± 2 °C for 24 h. Then place it at room temperature for 1 hour. Place it at ambient temperature of -40 °C ± 2 °C, for 24 hours. Finally place it at room temperature for 1 hour. 6.4.3.2 After the end of the test, perform the normal temperature performance test, according to 6.1.2.1. 6.4.4 Working performance in damp heat environment 6.4.4.1 Fix the sample, according to the actual vehicle installation state. Put it into the constant temperature and humidity chamber. Connect the relevant pipelines and circuits. Carry out 7 cycles of tests, according to the test the test, according to the corresponding degree of protection, which is specified in Chapter 8 of GB/T 4942.1-2006. 6.4.6.1.2 After the dustproof test, perform the normal temperature performance test, according to 6.1.2.1. 6.4.6.2 Waterproof test 6.4.6.2.1 Seal the air extraction port of the sample. Install and connect the power harness, according to the actual vehicle installation state. Then conduct the test, according to the corresponding degree of protection, which is specified in Chapter 9 of GB/T 4942.1-2006. 6.4.6.2.2 After the waterproof test, perform the normal temperature performance test, according to 6.1.2.1. 6.5 Corrosion resistance 6.5.1 Resistance to salt spray corrosion 6.5.1.1 After sealing the air extraction port of the sample, place the sample in the salt spray test chamber, in the vertical direction. Carry out the continuous spray test for 144 hours, according to the neutral salt spray test requirements in GB/T 10125-2012. After the test, use the clean running water, which is not higher than 40 °C, to remove the salt deposits from the surface of the sample. Then use air to dry it within 2 minutes. Check and record the corrosion of the protective layer on the surface of the sample. 6.5.1.2 After the salt spray test, the sample shall be subjected to the normal temperature performance test, according to 6.1.2.1. 6.5.2 Surface resistance to medium 6.5.2.1 At room temperature, smear the following test medium on the outer surface of the sample. After placing it at room temperature for 1 h, place it at an ambient temperature of 60 °C for 24 h. Then use free air to dry it, at room temperature. Note: It may divide multiple areas on the surface of the same sample. Apply a medium to each area. a) Gasoline or diesel; b) Brake fluid; c) Engine oil; d) Coolant; ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.