Method and apparatus for accurately determining opening and closing times for automotive fuel injectors,申请号US19960686935-传众专利搜索

Method and apparatus for accurately determining opening and closing times for automotive fuel injectors

申请公布号：US5747684(A)

申请号：US19960686935

申请日期：1996.07.26

申请公布日期：1998.05.05

申请人：

SIEMENS AUTOMOTIVE CORPORATION

发明人：PACE, JEFFREY B.;WARNER, VERNON R.;WRIGHT, DANNY O.

分类号：F02M65/00;(IPC1-7):G01M15/00;G01L3/26

主分类号：F02M65/00

摘要：Opening and closing times of a fuel injector are accurately determined in accordance with the energy content of an accelerometer trace. The energy content of an accelerometer trace is determined in accordance with a predetermined relation. A line is defined between known points prior to and after the opening or closing time. The normal distance between the line connecting known points and the accelerometer trace energy content is maximum at the inflection point, which corresponds to the opening or closing time. With this data, an ECU can be properly programmed to more accurately control an injector stroke, thereby improving engine performance.