Diagnosis of automotive electronic throttle control systems

During the past two decades, the automotive industry has been required to develop on-board health monitoring capabilities to meet legislated diagnostic requirements for engine management systems. In this paper, real-time diagnostics are presented which monitor the performance of an electronic throttle control system to detect and identify a suite of anomalies. The ETC system shall be modeled and a parity diagnostic strategy applied to detect the presence of faults. The specific nature of the fault is isolated using a parametric estimation methodology. Representative numerical results are presented and discussed to demonstrate the operational performance of the ETC system and health monitoring algorithms. (C) 2003 Elsevier Ltd. All rights reserved.