ISO 4008-2:1983

Overview

ISO 4008-2:1983 - Road vehicles - Fuel injection pump testing - Part 2: Static conditions - specifies the requirements and characteristics of test benches used to calibrate fuel injection pumps for compression‑ignition (diesel) engines. It applies to test benches for pumps delivering up to 300 mm³ per injection per cylinder at full load and defines static-system features, measurement accuracy, instrumentation tolerances, and acceptance testing (type and field tests).

Key topics and technical requirements

The standard focuses on static test-bench elements that ensure consistent, repeatable pump calibration. Important technical requirements and features include:

• Scope: Test benches suitable for calibration of fuel injection equipment for compression‑ignition engines (≤ 300 mm³/injection/cylinder).
• Measurement principles: Delivery from each injector must be measured and the average specific delivery Q reported over not less than 25 strokes. True (absolute) delivery is established by collecting a large sample and comparing volume to counted turns.
• Accuracy limits (type and field tests):
  • Overall measurement error for many type‑test systems: **e