On-board diagnosis of the drive circuit of an electronically controlled injector

Abstract

On-board diagnosis regulations, drive safety, and facility of service require that the engine control unit must detect malfunctions of the electronically controlled fuel injection system. For injector drive circuit faults, there are two types of fault definition in the Society of Automotive Engineers J2012 regulation, it is not enough to satisfy the above requirements. Through analysing the feedback current and voltage of the drive circuit under faulty and no-fault conditions and abstracting fault symptoms, this paper extends further the range of on-board diagnosis strategies, including an open circuit, a high-side drive short circuit to the low-side drive, a high- (or low-)side drive short circuit to the power supply, and a high- (or low-) side drive short circuit to the ground. After the circuit fault is confirmed, the diagnosis strategy can trigger an appropriate failure strategy to guarantee safety and to avoid emissions deterioration. In order to enhance the diagnosis reliability, the key constants of the diagnosis strategies are calibrated using a statistical method.

Keywords

on-board diagnosis drive circuit electronically controlled injector

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References

Baltusis

On board vehicle diagnostics. SAE Technical paper series 2004–21–0009, 2004.

Sachenbacher

Advances in design and implementation of OBD functions for diesel injection based on a qualitative approach to diagnosis. In Proceedings of the SAE 2000 World Congress, Detroit, Michigan USA, 2000, pp. 23–32 (SAE International, New York).

3 SAE J2012, Trouble code definitions, 2007 (SAE International, New York).

Xiao

W.-Y.

Injection pressure control of GD-1 electronically controlled high-pressure common rail fuel injection system (in Chinese). Trans. Chin. Soc. Internal Combust. Engines, 2004, 22(3), 235–240.

Mao

X.-J.

Study of idle speed control strategies of GD-1 high pressure common rail diesel engine (in Chinese). Trans. Chin. Soc. Internal Combust. Engines, 2002, 21(4), 324–328.

Zhuo

Lin

Development of hardware for GD-1 high pressure common rail vehicle diesel engine (in Chinese). Trans. Chin. Soc. Internal Combust. Engines, 2002, 20(5), 419–423.

Schwarte

Isermann

Model-based fault detection of diesel intake with common production sensors. In SAE 2002 World Congress, Detroit, Michigan, USA, 4–7 March 2002, pp. 4–9 (SAE International, New York).

Kimmich

Schwarte

Isermann

Model based fault detection for diesel engines. In Proceedings of the Aachen Colloquium, on Automobile and Engine Technology, Aachen, Germany, 2001.

Isermann

Schwarte

Kimmich

Model based fault detection of a diesel engine with turbo charger - a case study. In Proceedings of the IFAC Symposium on Automotive Systems, Salerno, Italy, 2004.

10.

Sachenbacher

Struss

Weber

Advances in design and implementation of OBD functions for diesel injection systems based on a qualitative approach to diagnosis. In Proceedings of the SAE 2000 World Congress, Detroit, Michigan, USA, 2000, pp. 333–338 (SAE International, New York).

11.

Füssel

Fault diagnosis with tree-structured neuro-fuzzy systems. Fortschr.-Ber. VDI, 2003, 8(957), 55–59.

12.

Nelles

Nonlinear system identification with local linear neuro-fuzzy models, 1999 (Shaker-Verlag, Aachen).

13.

Nielsen

Nyberg

Model-based diagnosis for the air intake system of SI-engines. In Proceedings of the SAE World Congress, Detroit, Michigan, USA, 1998, pp. 135–142 (SAE International, New York).

14.

Feng

Development of a new calibration tool for in-vehicle electronic control units based on KWP2000 (in Chinese). Trans. Chin. Soc. Internal Combust. Engines, 2003, 22(3), 265–271.

15.

Wang

J.-X.

Yang

Feng

Mao

X.-J.

Zhuo

Development of a calibration and monitoring system for GD-1 high pressure common rail diesel engine. J. Shanghai Jiaotong Univ., 2004, 2, 45–49.