TS ISO 7967-12

TS ISO 7967-12 is a vocabulary standard part for terms and definitions related to exhaust emission in reciprocating internal combustion engines. Its focus is terminology rather than design rules: it organises the language used for emission control systems, the devices within those systems, and the parameters associated with them.

Why exhaust-emission terms are handled as a separate vocabulary set

In reciprocating internal combustion engines, exhaust emission is a broad technical topic that includes the gaseous and particulate products of combustion and the systems used to manage them. Emission control can involve engine calibration, aftertreatment devices, sensors, and control logic. A shared vocabulary helps engineers, specifiers, and technical writers use the same terms consistently across documentation and communication.

The standard states that the terms are grouped into three categories: exhaust emission matter; exhaust emission control system and device; and parameters for exhaust emission control system. It also points to ISO 2710-1 as the source for the general classification and basic terminology of reciprocating internal combustion engines, with this part extending that framework into the emission domain.

• Exhaust emission matter: terminology for gases, particulates, and other constituents present in the exhaust flow.
• Exhaust emission control system and device: names for systems and equipment used to reduce or regulate emissions.
• Parameters: measurable quantities and concepts used to describe control-system operation, performance, or condition.

As a vocabulary standard, this document does not describe how to build or test an emission-control system. Its value lies in removing ambiguity, especially where different engine applications, aftertreatment architectures, and measurement contexts need to be discussed with precision.