Title:
【発明の名称】エンジン管理システムにおける診断システム
Document Type and Number:
Japanese Patent JP2002505727
Kind Code:
A
Abstract:
A diagnostic system in an engine management system is provided for generating a diagnostic trouble code (DTC) to indicate the operational status of a component or a sub-system. The diagnostic system includes a diagnostic function module (DF module) for each DTC or a group of related DTCs associated with a component or sub-system. The DF module includes means for executing an evaluation routine to evaluate a component/sub-system to which the DTC of the specific DF module relates, and a dynamic scheduler for determining which DF module may be allowed to execute an evaluation routine at a particular time. Each DF module includes means for producing a ranking value dependent on the operating status of the component or sub-system being evaluated, a ranking value being generated each time an evaluation routine is performed; means for processing and storing statistical results of the ranking values obtained over a number of evaluation routines; means for evaluating the statistical results to produce evaluated data in the form of either an evaluated no-fault signal or an evaluated fault signal, and means for establishing the priority of the associated evaluation routine, and means for transmitting the evaluated signals to the dynamic scheduler.
Inventors:
Moller, Peter
Application Number:
JP54156298A
Publication Date:
February 19, 2002
Filing Date:
March 30, 1998
Export Citation:
Assignee:
Volvo Person Wagner Arbe
International Classes:
G01M15/04; F02D41/22; F02D45/00; (IPC1-7): F02D41/22; F02D45/00; G01M15/00
Attorney, Agent or Firm:
Shusaku Yamamoto