TS ISO 7967-4

TS ISO 7967-4 is a vocabulary part for reciprocating internal combustion engines, focused on the terms used for pressure charging and for air and exhaust gas ducting systems. Rather than defining how the engine works in general, it establishes consistent naming for the components and flow paths associated with these subsystems.

Why pressure charging and ducting systems are treated separately

Pressure charging is the general technical concept of supplying intake air to the cylinders at a pressure above natural aspiration. In practice, that involves related elements such as turbochargers, compressors, intake manifolds, intercoolers, and exhaust-side connections. Air and exhaust gas ducting describes the routing and connection arrangement that carries these flows through the engine system. Clear terminology matters because designers, manufacturers, and service personnel must refer to the same parts in the same way.

Scope and the linked general engine reference

According to the supplied scope, this part covers only the terms relating to pressure charging and air/exhaust gas ducting systems. The scope note also points to ISO 2710 for the classification of reciprocating internal combustion engines and the definition of their basic terms and characteristics. TS ISO 7967-4 is therefore a specialised vocabulary document for particular subsystems, not a general engine terminology standard.

In engineering use, this kind of terminology supports communication about performance, emissions management, thermal loading, gas exchange, and system layout. It is especially valuable in technical drawings, maintenance documentation, and design descriptions where precise language helps reduce ambiguity.