標(biāo)準(zhǔn)編號(hào):	QC/T 479-1999
中文名稱:	貨車客車臺(tái)架試驗(yàn)方法
英文名稱:	Trucks and Buses Brake Bench Test Method
行業(yè)分類:	QC    汽車行業(yè)標(biāo)準(zhǔn)
發(fā)布機(jī)構(gòu):	國(guó)家機(jī)械工業(yè)管理局
發(fā)布日期:	1999-03-15
實(shí)施日期:	1999-3-15
標(biāo)準(zhǔn)狀態(tài):	superseded
被新標(biāo)準(zhǔn)替代:	QC/T 239-2015 商用車輛行車制動(dòng)器技術(shù)要求及臺(tái)架試驗(yàn)方法
被替代日期:	2015-10-1
替代舊標(biāo)準(zhǔn):	GB/T 12780-1991 貨車、客車制動(dòng)器臺(tái)架試驗(yàn)方法
翻譯語(yǔ)言:	英文
文件格式:	PDF
中文字符數(shù):	8000 字
翻譯價(jià)格(元):	240.0
交付時(shí)間:	付款后 1 個(gè)工作日

1 Subject Content and Application Scope This standard specifies test items, test method and procedure of bench test for trucks and buses brake assembly (hereafter referred to as brake). This standard is applicable to hydraulic or air running brake for trucks and buses which the total mass is within 1800 kg~30000 kg. 2 Normative references GB/T 3730.1 Motor vehicles and trailers — Types — Terms and definitions GB/T 5620.1~5620.2 Terms and Definitions of Braking of Automotive Vehicles and Their Trailers QC/T 556 Automotive Brake - Temperature Measurement and Thermocouple Attachment 3 Terms 3.1 Braking period Elapsed time from staring a braking to starting next braking in a continuous braking procedure 3.2 Constant input mode A control mode to make the pressure of the input pipe constant in a braking procedure 3.3 Constant output mode A control mode to make the brake moment outputted by a brake constant in a braking procedure 3.4 Initial temperature of brake Temperature of brake drum (disc) or brake lining when starting braking; when multiple brakes are tested simultaneously, the highest temperature shall be adopted 3.5 Maximal brake moment The maximal value (MBmax) of the vertical coordinates in the brake moment - braking time curve (brake moment - vertical coordinate, braking time - horizontal ordinate) in a braking procedure 3.6 Minimal brake moment The maximal value (MBmin) of the vertical coordinates in the brake moment - braking time curve (brake moment - vertical coordinate, time-varying - horizontal ordinate) in a braking procedure 3.7 Mean brake moment The vertical coordinate gained with the method of the area enclosed by main braking procedure, brake moment and braking time, being divided by the main braking time in a braking procedure 3.8 Braking time The acting time of a brake includes build-up time of braking force, main braking time and release time 3.9 Scuffing Braking under the condition of continuous power input