【英文标准名称】:Testingofsurfaceactiveagentsandtextileauxiliaries-Testingoftheeffectoflevellingagentsonvatdyeingsoncellulosicfibres,levelling-outtestinthedyebath
【原文标准名称】:表面活性剂和纺织助剂的检验.纤维素纤维在还原染料染色时均染剂作用的检验.染浴中均染效果的检验
【标准号】:DIN53988T.1-1976
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】:


Product Code:SAE ARP890
Title:Spark Plug Rating Calibration
Issuing Committee:E-30 Propulsion Ignition Systems Committee
Scope:It has been found that the cooling rate of spark plugs in comparison with the indicated mean effective pressure on the piston can vary greatly between one cylinder head and another. Also, on occasions, a wide variation in ratings was found between those taken at one time in comparison with those taken at another time on the same cylinder head. These differences were due to many conditions, some of them controllable and some uncontrollable. Accordingly, it is necessary to arrive at a means of correction for these variables so that comparable results can be obtained at all times. This is necessary in order to establish acceptable standards for use in development work and in the application of production quality control. After considerable work on the investigation of rating correction means, it has been decided that carefully made spark plugs offer the best method of detecting and compensating for engine and operating variables. The spark plug models which have been determined as satisfactory for this purpose are listed in AS889. As a result of the research program, the following procedure is recommended for the use of calibration spark plugs.