標準號：SIS SS-ISO 7644-1989
中文標準名稱：道路車輛．壓縮點火式（柴油機）引擎所排廢氣渾濁度測量．加載減速測試
英文標準名稱：Road vehicles — Measurement of opacity of exhaust gas from compression-ignition (diesel) engines — Lug-down test
發布日期：1989/12/6 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This International Standard specifies a test method for the measurement of exhaust gas opacity from compression-ignition (diesel-)engined vehicles. It describes the measurement of exhaust opacity under quasi-steady conditions during a lug-down at full load ?ver the normal operating speed range of the engine.NOTE — This method is most suitable as an inspection station test. The test method with a steady single speed specified in ISO 7645 is also well suited to an inspection station test, but may be used on the road.