Fluid manifold for use in an scr dosing system

Abstract

A reductant dosing system manifold includes: a body, a first passage in the body configured to receive a first fluid from a first separately disposed component of a reductant dosing system, and a second passage in the body configured to receive the first fluid from a second separately disposed component of the reductant dosing system, wherein the first passage and the second passage are fluidly isolated from each other within the body, and wherein a positional relationship of the first passage and the second passage is fixed by the body.

What is claimed is: 
     
         1 . A reductant dosing system manifold comprising:
 a body;   a first passage in the body configured to receive a first fluid from a first separately disposed component of a reductant dosing system; and   a second passage in the body configured to receive the first fluid from a second separately disposed component of the reductant dosing system,   wherein the first passage and the second passage are fluidly isolated from each other within the body, and wherein a positional relationship of the first passage and the second passage is fixed by the body.   
     
     
         2 . The reductant dosing system manifold of  claim 1 , wherein the first fluid is a coolant. 
     
     
         3 . The reductant dosing system manifold of  claim 2 , wherein the first separately disposed component is a reductant tank, and the second separately disposed component is a reductant pump. 
     
     
         4 . The reductant dosing system manifold of  claim 3 , wherein the first passage receives the coolant from the reductant tank and transmits the coolant to the reductant pump, and wherein the second passage receives the coolant from the reductant pump and transmits the coolant away from the reductant pump. 
     
     
         5 . The reductant dosing system manifold of  claim 1 , further including a third passage in the body configured to receive a second fluid,
 wherein the third passage is fluidly isolated from both the first passage and the second passage within the body, and wherein a positional relationship of the first passage, the second passage and the third passage is fixed by the body.   
     
     
         6 . The reductant dosing system manifold of  claim 5 , wherein the first fluid is coolant and the second fluid is reductant 
     
     
         7 . The reductant dosing system manifold of  claim 6 , wherein the reductant includes urea. 
     
     
         8 . The reductant dosing system manifold of  claim 6 , further including a reductant quality sensor disposed in fluid communication with the third passage. 
     
     
         9 . The reductant dosing system manifold of  claim 6 , further including a reductant quality sensor disposed in thermal communication with the coolant. 
     
     
         10 . The reductant dosing system manifold of  claim 5 , wherein the body includes:
 a first component including the first passage disposed therein;   a second component including the second passage disposed therein; and   a third component including the third passage disposed therein.   
     
     
         11 . The reductant dosing system manifold of  claim 10 , wherein the first component, the second component and the third component are a single, unitary and indivisible component. 
     
     
         12 . The reductant dosing system manifold of  claim 10 , wherein at least two of the first component, the second component and the third component are divisible components. 
     
     
         13 . A reductant supply assembly comprising:
 a reductant tank;   a reductant pump in fluid communication with the reductant tank; and   a fluid manifold including:
 a body; 
 a first passage in the body configured to receive a first fluid from a first separately disposed component of the reductant supply assembly; and 
 a second passage in the body configured to receive the first fluid from a second separately disposed component of the reductant supply assembly, 
 wherein the first passage and the second passage are fluidly isolated from each other within the body, wherein a positional relationship of the first passage and the second passage are fixed by the body, and wherein the fluid manifold provides the fluid communication between the reductant tank and the reductant pump. 
   
     
     
         14 . The reductant supply assembly of  claim 13 , wherein the first fluid is a coolant and the first passage transmits the coolant to the reductant pump and the second passage transmits the coolant away from the reductant pump. 
     
     
         15 . The reductant supply assembly of  claim 13 , wherein the fluid manifold includes a third passage in the body configured to receive a second fluid,
 wherein the third passage is fluidly isolated from both the first passage and the second passage within the body, and wherein a positional relationship of the first passage, the second passage and the third passage is fixed by the body.   
     
     
         16 . The reductant supply assembly of  claim 15 , wherein the second fluid includes reductant including urea. 
     
     
         17 . The reductant supply assembly of  claim 16 , wherein the fluid manifold further includes a reductant quality sensor in fluid communication with the reductant. 
     
     
         18 . The reductant supply assembly of  claim 17 , wherein the first fluid is a coolant and the reductant quality sensor is in thermal communication with the coolant. 
     
     
         19 . The reductant supply assembly of  claim 15 , wherein the fluid manifold further comprises an expansion device in fluid communication with at least one of the first passage, second passage or third passage and configured to expand with freezing of fluid in the at least one of the first passage, second passage or third passage. 
     
     
         20 . The reductant supply assembly of  claim 13 , wherein the fluid manifold is configured to include at least a portion thereof which has a lower resistance to expansion than at least one of the reductant tank and the reductant pump.