公开(公告)号：US20140369899A1

公开(公告)日：2014-12-18

申请号：US14474192

申请日：2014-09-01

Applicant: Caterpillar Inc.

Inventor： MATTHEW FAHRENKRUG ,  Sumeeth Shantharaju Sivanagere ,  Thomas George Ausman ,  William Charles Morris ,  Neil Alan Terry ,  David Firel Schaller ,  Dongming Tan ,  Kurtis Edward Chenoweth ,  Timothy Cameron Englert

IPC: F01N3/20

CPC classification number: F01N3/2066 ,  F01N2610/02 ,  F01N2610/11 ,  Y02T10/24

Abstract: A cooling system in an aftertreatment unit for a multi-cylinder internal combustion engine is disclosed. The aftertreatment unit includes a selective catalyst reduction (SCR) module, an exhaust conduit portion, and a number of reductant injectors. Each reductant injector includes an injector coolant outlet. The cooling system supplies coolant to the reductant injectors by a coolant pump. A phase separation tank, positioned at a higher gravitational potential downstream of the reductant injectors, includes a number of compartments. Each compartment includes at least one inlet portion and at least one outlet portion. Each inlet portion is in fluid communication to the injector coolant outlet and each outlet portion is in fluid communication with the coolant reservoir. A coolant anti-siphon line portion facilitates fluid communication between the reductant injectors and the phase separation tank. Additionally, a coolant vent line facilitates fluid communication between the phase separation tank and the coolant reservoir.

Abstract translation: 公开了一种用于多缸内燃机的后处理单元中的冷却系统。 后处理单元包括选择性催化剂还原（SCR）模块，排气导管部分和多个还原剂喷射器。 每个还原剂喷射器包括喷射器冷却剂出口。 冷却系统通过冷却剂泵将冷却剂提供给还原剂喷射器。 位于还原剂喷射器下游的较高重力势的相分离罐包括多个隔室。 每个隔室包括至少一个入口部分和至少一个出口部分。 每个入口部分与喷射器冷却剂出口流体连通，并且每个出口部分与冷却剂储存器流体连通。 冷却剂防虹吸管线部分促进还原剂喷射器和相分离罐之间的流体连通。 此外，冷却剂通气管路有助于相分离罐和冷却剂储存器之间的流体连通。