专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US4398259A Snap acceleration method of diagnosing faults in internal combustion engines 失效
标题翻译：内燃机故障诊断快速加速方法
公开(公告)号：US4398259A
公开(公告)日：1983-08-09
申请号：US174546
申请日：1980-08-01
申请人： David A. Levine
发明人： David A. Levine
IPC分类号： G01M15/04 , G01M15/00 , G06F15/46
CPC分类号： G01M15/044
摘要： A method and apparatus are disclosed for diagnosing faults in individual cylinders of an internal combustion engine. An engine (12) is accelerated, while an analyzer (10) provides measurements of the time intervals required for the engine to rotate for successive, equal angular increments as the engine is being accelerated, where each increment is a fraction of the rotation required for a single engine cylinder power contribution. The values of the resulting sequence of time interval measurements generally undulate with time about an average value due to the power contribution of each individual cylinder, with the average value of the time interval measurements and the magnitude of the undulations about this average value generally decreasing with time due to the acceleration of the engine. The analyzer (10) modifies the time interval measurements in the sequence so as to provide a modified sequence having a substantially constant average value and substantially constant magnitude of undulation. The analyzer (10) then compares the characteristics of the individual undulations in the modified sequence so as to diagnose faults in the individual cylinders in the engine.
摘要翻译：公开了一种用于诊断内燃机的各个气缸中的故障的方法和装置。发动机（12）被加速，而分析器（10）提供发动机在加速发动机时连续等角度增量所需的时间间隔的测量，其中每个增量是所需旋转所需的一小部分单发动机气缸功率贡献。时间间隔测量的结果序列的值通常由于每个单独气缸的功率贡献而与时间相关的平均值波动，其中时间间隔测量的平均值和关于该平均值的起伏的幅度通常随着时间由于发动机的加速。分析器（10）修改序列中的时间间隔测量，以便提供具有基本上恒定的平均值和基本恒定的波动幅度的修改序列。分析器（10）然后比较修改的序列中各个波动的特性，以便诊断发动机中各个气缸中的故障。

IPRDB

热门服务

关于我们

友情链接

联系方式