公开(公告)号：US4250707A

公开(公告)日：1981-02-17

申请号：US970075

申请日：1978-12-14

申请人： Francesco Cavallino ,  Pasquale Martinez ,  Stefano Vaccaneo ,  Michele Allione

发明人： Francesco Cavallino ,  Pasquale Martinez ,  Stefano Vaccaneo ,  Michele Allione

IPC分类号： F01N3/34 ,  F02D37/02 ,  F02M1/04 ,  F02M7/133 ,  F02M23/08 ,  F02M25/07 ,  F02P5/10 ,  F02M23/10 ,  F01N3/10

CPC分类号： F02D37/02 ,  F01N3/34 ,  F02M1/04 ,  F02M23/085 ,  F02M26/42 ,  F02M7/133 ,  F02P5/106 ,  F02M2026/002 ,  F02M2026/004 ,  Y02T10/146 ,  Y02T10/20

摘要： An exhaust emission control system for a spark ignition internal combustion engine comprises a first pressure sensitive valve for recycling a proportion of the exhaust gases from the exhaust to the induction when the engine is warm, being inhibited when the engine is cold, valves for admitting a small amount of fresh air to the exhaust manifold, a second pressure sensitive valve for admitting fresh air to the induction manifold downstream of the carburettor when the engine is warm, being closed when the engine is cold and when the starter motor is energized, a first fuel/air mixture enrichment valve in the carburettor sensitive to induction manifold pressure and de-sensitized when the engine is cold, a second fuel/air mixture enrichment valve sensitive to induction manifold pressure and de-sensitized when the engine is hot, and a vacuum advance delay which is by-passed when the engine is warm.

摘要翻译： 一种用于火花点火内燃机的废气排放控制系统包括：第一压力敏感阀，用于在发动机冷却时将来自排气的一部分排气回收到感应，当发动机冷却时被抑制，用于接纳 少量的新鲜空气到排气歧管，第二压敏阀，用于当发动机冷却时将化油器下游的新鲜空气引入化油器下游，当发动机冷却时和当起动器电动机通电时，第一压力敏感阀，第一 化油器上的燃料/空气混合物浓缩阀对于感应歧管压力敏感，当发动机冷时敏感，第二燃料/空气混合物浓缩阀对感应歧管压力敏感，并且在发动机处于热状态时对其进行去敏化;以及真空 发动机温暖时旁路的提前延时。