序言这是CSA M424的第三版。2.用于无瓦斯地下矿山的柴油动力机器。它取代了1990年和2016年出版的之前版本。本版本的变化包括:a）范围已扩大，包括更大、更多样化的柴油机；b） 与发动机无关的一般机器安全要求已转移至CSA M424。0;c） 降低了发动机排放测试合格/不合格标准，以反映现代技术；d） 确定通风率的EQI概念已被删除；e） 已启用改装排放控制装置的通风速率测定； andf）本标准中的各种条款已更新或重新编号，以符合当前的管理要求。CSA集团承认，该标准的制定部分是由于加拿大自然资源部CanmetMINING，Land and Minerals Sector的财政支持。本标准由CSA集团在加拿大劳动法管理者协会-职业安全与健康（CAALL-OSH）的资助下制定，包括省级和地区政府，以及加拿大政府。 CSA集团对本标准的内容全权负责，CSA集团和资助机构不承担与使用本标准所含信息有关的任何责任。本标准的制定符合加拿大标准委员会对加拿大国家标准的要求。CSA集团已将其作为加拿大国家标准发布。范围1。1.本标准描述了用于无气体地下矿山的新的或未使用的柴油发动机的设计、性能和测试所需的技术要求和程序。注: 见CSA M424。1.用于高瓦斯地下煤矿的柴油机的额外防爆结构和性能要求。1.2例外情况机器设计和性能要求不包括在本标准的范围内。本标准不包括制动系统性能要求和验证试验。注:1）见CSA M424。0和CSA M424。4.一般地下采矿车辆性能要求。2） 见CSA M424。3.制动器构造、制动性能和试验要求。1.3本标准中的术语应用于表示要求，即:。 e、 ，用户必须满足的条款，以符合标准；应用于表达建议或建议但不需要的建议；可用于表示一个选项或在标准范围内允许的选项。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）来定义其应用。

PrefaceThis is the third edition of CSA M424.2, Diesel-powered machines for use in non-gassy underground mines. It supersedes the previous editions published in 1990 and 2016. Changes to this edition include:a) the Scope has been expanded to include larger and more varied types of diesel-powered machines;b) non-engine related general machine safety requirements have been transferred to CSA M424.0;c) engine emissions testing pass/fail criteria have been lowered to reflect modern technologies;d) EQI concept for ventilation rate determination has been removed;e) ventilation rate determination for retrofit emission control devices has been enabled; andf) various Clauses throughout the Standard have either been updated or renumbered to comply with current administrative requirements.CSA group acknowledges that the development of this Standard was made possible, in part, by the financial support of CanmetMINING, Lands and Minerals Sector, Department of Natural Resources Canada. This Standard was developed by CSA Group with funding support provided by the Canadian Association of Administrators of Labour Law - Occupational Safety and Health (CAALL-OSH), including provincial and territorial governments, as well as the Government of Canada. CSA Group is solely responsible for the content of this Standard, and CSA Group and the funding bodies disclaim any liability in connection with the use of the information contained herein.This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.Scope1.1 Inclusions This Standard describes the technical requirements and procedures necessary for the design, performance, and testing of new or unused diesel engines for use in non-gassy underground mines. Note: See CSA M424.1 for additional explosion-proof construction and performance requirements for diesel-powered machines for use in gassy underground coal mines.1.2 Exclusions Machine design and performance requirements are not included in the Scope of this Standard. Braking system performance requirements and proof tests are not included in the Scope of this Standard.Notes: 1) See CSA M424.0 and CSA M424.4 for general underground mining vehicle performance requirements. 2) See CSA M424.3 for brake construction, stopping performance, and test requirements.1.3 Terminology In this Standard, shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; should is used to express a recommendation or that which is advised but not required; and may is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.