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GB/T 5620-2020: Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 5620: Historical versions
GB/T 5620-2020: Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT5620-2020 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.40 T 24 GB/T 5620-2020 / ISO 611.2003 Replacing GB/T 5620-2002 Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers (ISO 611.2003, Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary, IDT) Issued on. SEPTEMBER 29, 2020 Implemented on. APRIL 01, 2021 Issued by. State Administration for Market Regulation; Standardization Administration of the PRC. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Braking systems and equipment - General... 5 4 Classification of braking systems... 7 4.1 Braking systems relating to their energy supplying device... 7 4.2 Braking systems relating to transmission means... 8 4.3 Braking systems relating to arrangement of transmission means... 9 4.4 Braking systems relating to vehicle combination... 10 5 Braking system components... 11 6 Driver supporting control braking systems... 21 7 Braking phenomena... 25 7.1 Lining characteristics with potential influence on braking performance... 25 7.2 Vehicle braking behaviour... 27 8 Brake lining tests... 28 9 Braking mechanics... 29 10 Pressures... 44 11 Additional definitions... 47 Annex A (Normative) Brake amplification factors... 49 Annex B (Normative) Evaluation of mean fully developed deceleration... 53 Bibliography... 55 Index... 56ForewordThis Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 5620-2002 "Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary". Compared with GB/T 5620- 2002, the main technical changes of this Standard are as follows. - ADD endurance braking system and its control device types to the braking systems (see 3.2.4); - ADD terms and definitions of braking systems relating to transmission means (see 4.2); - Adjust the relevant terms of brake components to Clause 5 (see 5.5.1; Clause 9 of the 2002 edition); - ADD the terms and definitions of "categories of retarder" and "auxiliary device consuming energy" (see 5.5.3.1, 5.14); - Delete the term and definition of "non-continuous braking system" (see 5.3.5 of the 2002 edition); - Modify the definition of "retarder" (see 5.5.3; 4.5.3 of the 2002 edition); - ADD terms and definitions of "engine brake", "exhaust retarder", "hydrodynamic retarder", "hydrostatic retarder", "permanent-magnetic retarder", "regenerative braking retarder", and "mechanical regenerative braking retarder" (see 5.5.3.2.1, 5.5.3.2.3, 5.5.3.2.5.1, 5.5.3.2.5.2, 5.5.3.2.6.2, 5.5.3.2.6.3, 5.5.3.2.7); - Delete the term and definition of "friction retarder" (see 4.5.3.6 of the 2002 edition); - ADD terms such as "traction control system", "stability control system", "brake hold and release aid", "autonomous intelligent cruise control", and "coupling force control system" and their definitions (see 6.2, 6.3, 6.4, 6.5, 6.6); - Adjust the terms related to the surface condition of brake linings to Clause 7 (see 7.1; 9.5 of the 2002 edition); - ADD "brake application", "brake actuation", "brake release", "actuation threshold", "clamping", "brake release position", "braking performance", "braking slip", "adhesion utilization", "compatibility", as well as terms and definitions related to the coefficient of friction (see 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.18, 9.19, 9.20, 9.21); - LIST the terms related to pressures separately; ADD terms such as "cut- out pressure" and "cut-in pressure" and their definitions (see Clause 10; 6.4 of the 2002 edition); - ADD the terms and definitions of "graduated braking", "automatic braking", "automatically commanded braking", "selective braking", "predominance", "running clearance", "circuit" and "braking modulation" (see Clause 11). This Standard, using translation method, is identical to ISO 611.2003 "Road vehicles - Braking of automotive vehicles and their trailers - Vocabulary". China’s document which has a consistent correspondence with the international document normatively referenced in this Standard is as follows. - GB/T 3730.1-2001 Motor vehicles and trailers - Types - Terms and definitions (ISO 3833.1977, MOD). This Standard has made the following editorial changes. - CHANGE the standard name to "Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers"; - REWRITE the definitions of some terms in accordance with Chinese language conventions. This Standard was proposed by Ministry of Industry and Information Technology of the PRC. This Standard shall be under the jurisdiction of National Technical Committee of Auto Standardization (SAC/TC 114). Drafting organizations of this Standard. Technical Center of China FAW Group Co., Ltd., Guangdong Automotive Test Center Co., Ltd., Zhejiang VIE Science & Technology Co., Ltd. Main drafters of this Standard. Lin Dahai, Xiao Wenjian, Hou Zonggang, Liu Jianguang, Wang Yufeng, Lv Zheng. The previous editions of the standard replaced by this Standard were released as follows. - GB/T 5620.1-1985, GB/T 5620.2-1985; - GB/T 5620-2002. Road vehicles - Vocabulary and definition for braking of automotive vehicles and their trailers1 ScopeThis Standard defines the principal terms used in relation to the braking and braking equipment of motor vehicles and trailers as defined in ISO 3833.2 Normative referencesThe following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document.3 Braking systems and equipment - GeneralBraking system allowing the driver to control, directly or indirectly and in a graduated manner, the speed of a vehicle during normal driving or to bring the vehicle to a halt.4 Classification of braking systemsBraking system in which the energy required for braking is supplied by one or more compressed springs acting as an energy storage accumulator.5 Braking system componentsA braking system consists of connected devices which supply energy, control and transmit that energy to the brakes and, if necessary, via supplementary devices on the towing vehicle, to the brakes of a towed vehicle. Friction brake in which the friction forces are produced between the components attached to a fixed part of the vehicle and the faces of one (more) discs.6 Driver supporting control braking systemsMulti-wheel control where the group of wheels controlled by the common command is restricted to those only on one side of the vehicle. Multi-wheel control where the signal of a predetermined wheel controls the system for all the wheels of the group.7 Braking phenomenaShallow crack in the surface, usually present in some numbers on the same lining. Random braking performance differences that the driver observes and which could affect the vehicle stability.8 Brake lining testsTest procedure consisting of one or more brake applications or the continuous dragging of the brake to generate heat with the effect that differences in braking performance, if any, can be observed.9 Braking mechanicsReturn of one or more braking system(s) to the deactivated condition. Minimum braking performance required by regulations. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 5620-2020 be delivered?Answer: The full copy PDF of English version of GB/T 5620-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 5620-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 5620-2020_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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