TS ISO 7967-5

TS ISO 7967-5 is a terminology standard that defines terms and definitions used for cooling systems in reciprocating internal combustion engines. It brings together the language used to describe how engine cooling is organised, while excluding the terminology of rotary-piston engines and other engine types.

Why cooling-system terminology matters

In general technical practice, the cooling system exists to control the heat produced by combustion so that engine parts do not run at excessively high temperatures. Components such as the cylinder, cylinder head, liners, radiator, pump, thermostat, and coolant passages each have distinct functions in moving heat through the engine and releasing it to the surroundings. A terminology standard helps keep these names consistent across design, maintenance, education, and technical documentation.

What this part focuses on

This part is limited to cooling-related terms for reciprocating internal combustion engines. From a general engineering perspective, liquid-cooled and air-cooled arrangements both serve the same broad purpose, but they remove heat in different ways; precise terminology helps distinguish these approaches and their components. That clarity is especially useful when similar-looking terms are used in different engine families but do not refer to the same hardware or function.

• Terms and definitions for cooling systems within internal combustion engine vocabulary
• A common technical language for reciprocating engines
• Exclusion of terms for rotary-piston and other non-covered engine types
• Consistent naming for both components and system-level concepts