Method and system for detecting an absolute pressure sensor malfunction,申请号US20040778875-传众专利搜索

Method and system for detecting an absolute pressure sensor malfunction

申请公布号：US2005182555(A1)

申请号：US20040778875

申请日期：2004.02.13

申请公布日期：2005.08.18

申请人：

YU SONGPING;PIETRZYK PAUL A.;DANHOFF GARY L.

发明人：YU SONGPING;PIETRZYK PAUL A.;DANHOFF GARY L.

分类号：F02D41/22;G06F7/00;(IPC1-7):G06F7/00

主分类号：F02D41/22

摘要：A method for detecting a malfunction in a manifold absolute pressure sensor used in an internal combustion engine. The method includes obtaining a plurality of samples from the manifold absolute pressure sensor. A plurality of samples is obtained from a mass airflow sensor for measuring air flow to the engine. A plurality of inferred manifold absolute pressures is estimated from the plurality of samples obtained from the mass airflow sensor. A linear functional relationship is determined between manifold absolute pressure and inferred absolute pressure from the obtained samples of the manifold pressure sensor and the estimated inferred manifold absolute pressures, such functional relationship having an offset term and a slope. A comparison is made between the determined offset term and the determined slope with a predetermined offset threshold and a predetermined slope threshold level, respectively.