Title:
MALFUNCTION DIAGNOSIS DEVICE FOR FUEL LEVEL SENSOR
Document Type and Number:
Japanese Patent JP3721922
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To improve the reliability of malfunction diagnosis device by diagnosing a fuel level sensor according to the fuel level.
SOLUTION: In a malfunction diagnosis device for fuel level sensor, a fuel swing amplitude for anomaly diagnosis judgment is set by fuel level average value gradually increasing and decreasing according to the fuel level. A control means provided with an anomaly diagnosing part for diagnosing anomaly in a fuel level sensor by comparing the fuel swing amplitude for anomaly diagnosis judgment and fuel swing amplitude of fuel level id provided. A control means provided with an anomaly diagnosis part for setting fuel level an anomaly diagnosing part for diagnosing anomaly in a fuel level for anomaly diagnosis judgment using virtual gain different in fuel level average value is provided. Furthermore, a control means provided with an anomaly diagnosis part for setting fuel level for anomaly diagnosis judgment and fuel level average value according to different fuel level gain is provided.
Inventors:
Toyoda, Katsuhiko
Application Number:
JP2000000049750
Publication Date:
September 22, 2005
Filing Date:
February 25, 2000
Export Citation:
Assignee:
SUZUKI MOTOR CORP
International Classes:
G01F23/00; B60K15/077; F02M37/00; G01F25/00; G01F23/00; B60K15/077; F02M37/00; G01F25/00; (IPC1-7): G01F25/00; B60K15/077; F02M37/00; G01F23/00