Abstract
Current trends in the passenger car industry are focused on reduction of manufacturing costs and thus increasing competitiveness on the automotive market. This paper introduces a new approach to vehicle diagnostics, promising direct cost reduction of in-vehicle diagnostic subsystems. The new approach provides for an easy transition from currently used concept of decentralized diagnostic probes to a centralized concept, based on (in an ideal case) a single diagnostic probe. This concept is demonstrated in a case study, which is focused on vehicle ignition system diagnostics. Diagnostic signatures are measured in vehicle supply network, and classified using additional information acquired from internal vehicle communication network. Case study results are presented including the discussion of advantages and limits of the centralized diagnostics concept. DOI: http://dx.doi.org/10.5755/j01.eee.20.10.5666
Highlights
Safety and reliability of passenger cars and their subsystems are discussed from the early beginning of the automotive industry [1]
Current vehicle diagnostic concept is based on a set of decentralized diagnostic probes that are typically used to detect a particular fault
The principal idea of the centralized diagnostics concept comes from the fact that all the state transitions of electromechanical or electrical components are accompanying with well-defined physical phenomena
Summary
Safety and reliability of passenger cars and their subsystems are discussed from the early beginning of the automotive industry [1]. Current vehicle diagnostic concept is based on a set of decentralized diagnostic probes that are typically used to detect a particular fault. With raising number of modern (often safety critical) driver assistance systems the number (and the costs) of diagnostic probes increases simultaneously [3], [4]. Centralized diagnostics concept is based on measuring and evaluating of diagnostic signatures in a single point of vehicle power supply network. The particular faults are specified more precisely and more diagnostic methods are explained in detail and verified using measured data. Another example of ignition system diagnostics is described in [7]
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