阻燃防火材料-网上贸易平台 | | WAP浏览
服务热线:4006555305
当前位置: 首页 » 防火测试中心 » 各国标准法规 » 美国 » 正文

ASTM D6421用试验台法评定汽车火花点火发动机燃料污染电子便携式燃油喷射器的试验方法

放大字体  缩小字体 发布日期:2012-02-08   浏览次数:162  分享到: 分享到腾讯微博
ASTM D6421用试验台法评定汽车火花点火发动机燃料污染电子便携式燃油喷射器的试验方法
ASTM D6421 Standard Test Method for Evaluating Automotive Spark-Ignition Engine Fuel for Electronic Port Fuel Injector Fouling by Bench Procedure
ASTM D6421用试验台法评定汽车火花点火发动机燃料污染电子便携式燃油喷射器的试验方法

Driveability problems in PFI automobiles were first reported in 1984. Deposits are prone to form on the metering surfaces of pintle-type electronic fuel injectors. These deposits reduce fuel flow through the metering orifices. Reductions in metered fuel flow result in an upset in the air-fuel ratio, which can affect emissions and driveability. When heavy enough, these deposits can lead to driveability symptoms, such as hesitation, hard starting, or loss of power, or a combination thereof, that are easily noticed by the average driver and that lead to customer complaints. The mechanism of the formation of deposits is not completely understood. It is believed to be influenced by many factors, including driving cycle, engine and injector design, and composition of the fuel. The procedure in this test method has been found to build deposits in PFIs on a consistent basis. This procedure can be used to evaluate differences in base fuels and fuel additives. A study of PFI fouling was conducted in both the bench test and the vehicle test procedures to obtain a correlation. The vehicle tests were conducted as described in Test Method D5598. The tests were conducted on several base gasolines, with and without additives blended into these base fuels. The PFI bench test proved to be reliable, repeatable, and a good predictor of PFI fouling in test vehicles.
State and Federal Legislative and Regulatory Action—Legislative and regulatory activity, primarily by the state of California (see 2.3) and the federal government (see 2.4), necessitate the acceptance of a standard test method to evaluate the PFI deposit-forming tendency of an automotive spark-ignition engine fuel.
Relevance of Results—The operating conditions and design of the laboratory apparatus used in this test method may not be representative of a current vehicle fuel system. These factors must be considered when interpreting results.
Test Validity:
Procedural Compliance—The test results are not considered valid unless the test is completed in compliance with all requirements of this test method. Deviations from the parameter limits presented in Section 10 will result in an invalid test. Engineering judgment shall be applied during conduct of the test method when assessing any anomalies to ensure validity of the test results.
1. Scope
1.1 This test method covers a bench test procedure to evaluate the tendency of automotive spark-ignition engine fuel to foul electronic port fuel injectors (PFI). The test method utilizes a bench apparatus equipped with Bosch injectors specified for use in a 1985-1987 Chrysler 2.2-L turbocharged engine. This test method is based on a test procedure developed by the Coordinating Research Council (CRC) for prediction of the tendency of spark-ignition engine fuel to form deposits in the small metering clearances of injectors in a port fuel injection engine (see CRC Report No. 592).
1.2 The test method is applicable to spark-ignition engine fuels, which may contain antioxidants, corrosion inhibitors, metal deactivators, dyes, deposit control additives, demulsifiers, or oxygenates, or a combination thereof.
1.3 The values stated in SI units are to be regarded as the standard. Approximate inch-pound units are shown in parentheses for information purposes only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given throughout this test method.
Note 1—If there is any doubt as to the latest edition of Test Method D6421, contact ASTM International Headquarters. Other properties of significance to spark-ignition engine fuel are described in Specification D4814.

2. Referenced Documents (purchase separately)
ASTM Standards
D4814 Specification for Automotive Spark-Ignition Engine Fuel
D5598 Test Method for Evaluating Unleaded Automotive Spark-Ignition Engine Fuel for Electronic Port Fuel Injector Fouling
ANSI Standard
MC96.1 American National Standard for Temperature Measurement Thermocouples
Clean Air Act Amendment
CleanAirActAmendment Provisions for Attainment and Maintenance of National Air Quality Standards
Index Terms
base fuel; bench test; deposit control additive; deposits (in internal combustion engines); electronic port fuel injector (PFI); flow rate, hot soak; injector fouling; pintle; spark-ignition engine fuel; test fuel; Automotive engine fuels/oils; Base fuel; Bench test; Bosch injectors; Deposit (internal combustion engine) formation; Electronic port fuel injector (PFI); Flow and flow rate--petroleum products; Hot soak; Injector fouling; Pintle ;

  详情请咨询
  防火资源网-阻燃防火测试中心
  电话:(+86)0592-5056213
  传真:(+86)0592-5105807
  邮件:firetest@firetc.com

凡注明"防火资源网"的所有作品,由<防火资源网>整理编辑,任何组织未经<防火资源网>及其拥有者授权,不得复制、转载、摘编或利用其它方式应用于任何商业行为。

 
 
[ 防火测试中心搜索 ]  [ ]  [ 告诉好友 ]  [ 打印本文 ]  [ 关闭窗口 ]  [ 返回顶部 ]

 

 
 
推荐防火测试
推荐图文
点击排行
 
 
网站首页 | 广告服务 | 关于我们 | 联系方式 | 服务协议 | 版权声明 | 网站地图 | 友情链接 | 网站留言 | 旧版本 | 闽ICP备09009213号
©2019-2021 FIRETC.COM All Rights Reserved   备案号:闽ICP备09009213号-1在线客服 点击QQ交谈/留言 点击QQ交谈/留言