Publisher's Synopsis
This report will allow those already familiar with basic electromagnetic compatibility (EMC) principles to appreciate the issues specific to the EMC of automotive vehicles, including the severe radiated EM environment they encounter, the difficulties of testing a large product at very high levels of radiated fields, the nature of the vehicle supply transients, and the need for achieving EMC at very low on-cost. The consequences of the publication of the Directive, commonly known as the Automotive EMC Directive, in November 1995, which takes cars and trucks out of the scope of 89/336/EEC, the general EMC Directive, are also studied.;After a general introduction to the history and future trends of automotive EMC, the report describes the various EMC phenomena and their magnitude, both conducted and radiated disturbances to the EM environment are considered. ESD is looked at briefly. Cost-effective design for achieving EMC is studied and recommendations are made for wiring harness design to ensure optimum EMC performance at minimum extra cost. Electronic control unit (ECU) design is studied in depth including ECU enclosure, filtering and the design of printed circuit boards, circuits, and software and microprocessors. Measurement methods for the various EMC phenomena are described including transient emissions and immunity, component and vehicle emissions, and finally, radiated on-board transmitter, whole-vehicle bulk current injection and component/system testing. The importance of EMC management is highlighted.;This report updates and replaces 96-0370, the main changes being in the appendix.
