公开(公告)号：US4280659A

公开(公告)日：1981-07-28

申请号：US59543

申请日：1979-07-23

申请人： Stephen L. Gaal ,  Gary L. Gant ,  George L. Muntean ,  Neville H. Reiners ,  Michael H. Shea

发明人： Stephen L. Gaal ,  Gary L. Gant ,  George L. Muntean ,  Neville H. Reiners ,  Michael H. Shea

IPC分类号： F02M57/02 ,  B05B9/00

CPC分类号： F02M57/021

摘要： This disclosure relates to a unit-type fuel injector for an internal combustion engine such as a reciprocating piston internal combustion engine. The injector includes an injector body forming a plunger bore, and a plunger that reciprocates in the bore. A fuel supply passage and a drain passage are formed in the body, and a fuel injection chamber is formed at the lower end of the plunger bore. A feed hole connects the chamber with the supply passage, and a scavenge passage connects the supply and drain passages. During a retracted plunger, or fuel metering, portion of the injector cycle, the plunger opens the feed hole and closes the scavenge passage, and during a down plunger, or scavenging, portion of the injector cycle, the plunger closes the feed hole and opens the scavenge passage. An annular groove is formed between injector parts and surrounds the chamber, and the groove collects leakage. A restricted bleed hole connects the groove with the low pressure drain and removes the leakage. The feed hole is at an end of the supply passage, and the incoming fuel flows in a direct path through the supply passage and feed hole to the injection chamber.

摘要翻译： 本公开涉及一种用于诸如往复活塞式内燃机的内燃机的单元型燃料喷射器。 喷射器包括形成柱塞孔的喷射器主体和在孔中往复运动的柱塞。 燃料供给通道和排放通道形成在主体中，并且燃料喷射室形成在柱塞孔的下端。 进料孔将该腔室与供给通道连接起来，并且一个清流通道连接供排通道。 在缩回柱塞或燃料计量期间，喷射器循环的一部分，柱塞打开进料孔并关闭清除通道，并且在喷射器循环的下降柱塞或清扫部分期间，柱塞关闭进料孔并打开 清扫通道。 在喷射器部件之间形成一个环形槽并围绕该腔室，并且凹槽收集泄漏。 限流排放孔将沟槽与低压排水管连接起来，消除泄漏。 进料孔位于供给通道的一端，进入的燃料直接通过供给通道和进料孔流到喷射室。