ISO 7967-11:2022

Overview

ISO 7967-11:2022 is an international vocabulary standard for liquid fuel systems used on reciprocating internal combustion engines. It defines consistent terms and definitions for components and subsystems of fuel supply arrangements, with entries organized into three main classes: fuel supply system, carburettor, and fuel injection system. This second edition (2022) updates and expands the 2014 edition with revised and additional terminology to support clear technical communication across design, testing and regulatory contexts.

Key topics

• Scope and structure
  • Establishes standardized vocabulary for liquid fuel systems (low‑ and high‑pressure supply, carburettors, injection).
  • Terms are classified under: fuel supply system (3.1), carburettor (3.2), and fuel injection system (3.3).
• Core component definitions
  • Fuel supply elements: fuel pump, feed/priming pump, fuel filter, low‑pressure supply to high‑pressure generators.
  • Carburettor terminology: venturi (single, double, triple), float chamber, float, needle/needle valve, jets/gicleurs (main, idle, power, starting), throttle butterfly, enrichment devices, progression/idle circuits, and sizing terms (venturi diameter, throttle bore).
  • Fuel injection vocabulary: (classified in 3.3 - standard provides definitions to harmonize injector and system terms).
• Technical clarifications
  • Includes illustrative figures (e.g., single and twin‑barrel carburettors) and cross‑references to related ISO documents (ISO 2710‑1 for engine classification).
  • No normative references are included; the document is a terminological reference rather than prescriptive test criteria.

Applications

ISO 7967-11:2022 is intended for professionals who need unambiguous terminology for design, manufacture, maintenance, documentation and regulatory work involving liquid fuel systems:

• Engine and vehicle OEMs, component suppliers (carburettors, pumps, injectors)
• Test laboratories, certification bodies and regulators
• Technical authors, service manuals, repair shops and maintenance teams
• Translators, standards writers and educators working on powertrain technology Using this vocabulary improves interoperability of technical documentation, parts catalogs, service instructions and compliance reports across international markets.

Related standards

• ISO 7967 series - other parts cover additional engine components and systems
• ISO 2710‑1 - classification of reciprocating internal combustion engines and basic engine terminology

Keywords: ISO 7967-11:2022, liquid fuel systems vocabulary, reciprocating internal combustion engines, carburettor terminology, fuel supply system, fuel injection vocabulary, engine components standard.