標準號：DIN 51756-7-1986
中文標準名稱：汽油檢驗.第7部分:使用 CFR 發動機法對酒精和酒精/燃料混合物抗震性(辛烷值)的測定
英文標準名稱：Testing of gasolines; determination of knock characteristics (octane number) of alcohols and alcohol/fuel mixtures using the CFR engine
標準類型：E31
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：E31
國際標準分類號：75.160.20
適用范圍：The determination of the anti-knock characteristics of alcohol and fuels containing alcohols is in principle done in accordance with DIN 51756 part 2 on the CFR-test-engine. DIN 51756 part 7 describes a variation of the original method, namely the use of a controlled needle jet of the carburettor instead of the level control with calibrated horizontal jet for the adjustment of the air-fuel ratio for maximum engine knock. In addition a inlet manifold heating is used in order to adjust the mixture temperature to the greater heat loss during eraporation of alcohols (especially methanol).#,,#