TS ISO 7967-4

TS ISO 7967-4 is a terminology standard for pressure charging and air/exhaust gas ducting systems in reciprocating internal combustion engines. It establishes a common technical vocabulary for components and subsystems involved in boosting intake air and routing exhaust gases, so terms such as turbocharging, supercharging, intake ducting and exhaust ducting are used consistently.

What this part covers

The scope is limited to reciprocating internal combustion engines. Rotary piston engines and other engine types are explicitly outside the scope. The document is concerned with definitions, not with performance limits or design prescriptions. In technical practice, pressure charging refers to increasing the mass of air delivered to the cylinders, while ducting systems describe the passages and flow paths that carry intake air and exhaust gas through the engine arrangement.

Why the terminology matters

• It separates boosting concepts from the airflow passages that support them.
• It helps engineers, trainers and documentation teams use the same words for the same engine features.
• It supports clear communication around intake flow, exhaust routing and pressure-related engine terminology without imposing a test method.

In general engineering context, pressure charging is commonly associated with turbochargers or mechanically driven superchargers, while ducting influences flow losses, pressure drop and the overall gas-exchange path. This part of ISO 7967 provides the naming framework for those concepts within reciprocating engine technology.