Scavenging Vacuum Pressure Provisioning with Exhaust Treatment

Abstract

In one embodiment, a method that includes collecting particles from an intake flow of air for a diesel engine; removing the particles collected using scavenging vacuum pressure and without adding exhaust restriction; and treating combustion products of the diesel engine.

Therefore, at least the following is claimed: 
     
         1 . A method comprising:
 collecting particles from an intake flow of air for a diesel engine;   removing the particles collected using scavenging vacuum pressure and without adding exhaust restriction; and   treating combustion products of the diesel engine.   
     
     
         2 . The method of  claim 1 , wherein removing the particles collected using scavenging vacuum pressure further comprises mechanically driving a fan to produce the scavenging vacuum pressure. 
     
     
         3 . The method of  claim 1 , wherein removing the particles collected using scavenging vacuum pressure further comprises converting rotational motion used for driving engine accessories to higher speed rotational motion to produce the scavenging vacuum pressure. 
     
     
         4 . The method of  claim 3 , wherein converting rotational motion further comprises:
 driving a component at a first speed of rotational motion; and   using the component to generate the higher speed rotational motion.   
     
     
         5 . The method of  claim 4 , wherein the component is a belt-driven component. 
     
     
         6 . The method of  claim 3 , wherein the converting rotational motion further comprises:
 driving a component at the first speed of rotational motion at a first location of the component, the first location exhibiting a first radius; and   generating the higher speed rotational motion at a second location of the component exhibiting a second radius, the second radius being longer than the first radius.   
     
     
         7 . The method of  claim 1 , wherein collecting particles from an intake flow of air further comprises pre-filtering the air to remove larger particles, and then filtering the air to remove smaller particles. 
     
     
         8 . The method of  claim 7 , wherein, in removing the particles collected using scavenging vacuum pressure, the scavenging vacuum pressure is directed to particles removed by the pre-filtering. 
     
     
         9 . The method of  claim 1 , wherein treating combustion products further comprises performing Selective Catalytic Reduction (SCR).