Abstract
The design aspects of automotive hybrids are discussed in general and illustrated by two specific examples, a thick film module used in the electronic fuel injection controller and a solid state ignition module. The environmental test conditions for the automotive environment are summarized, and it is shown how these conditions influence the hybrid design.
Highlights
Electronic control circuits are finding increasing use in engine control functions
Before a decision is made to develop a hybrid for a particular application it should be carefully evaluated if the hybrid solution offers any of the technology related advantages listed above
Hybrids should be used in applications where their inherent advantages can be utilized
Summary
Electronic control circuits are finding increasing use in engine control functions. The main driving forces behind this development are the need for better fuel economy, reduction of maintenance costs, better engine performance and the imposition of more stringent exhaust emission standards. The experience of the industry over the last 10 years has shown, that the success of automotive electronics depends primarily on two critical issues: the cost effectiveness, i.e. the cost/benefit ratio of the solution the reliability issue. The continued growth and increasing use of complex electronics will depend on how well these two issues can be solved. High reliability because of low thermal resistance and a minimum number of interconnections. Excellent manufacturing quality through automated manufacturing techniques High performance because of functional trimming to tight tolerances and good thermal tracking Cost effective combination of control and power circuits in one fully tested component
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