Device and method for an exhaust system of a motor vehicle

Abstract

A device for an exhaust system of a motor vehicle includes baffle wall, a passage, and a body having a sidewall with an exhaust conduit extending therethrough. The baffle wall has a bore in fluid communication with the exhaust conduit. The baffle wall extends from the sidewall and into the exhaust conduit for directing the flow of exhaust gas through the bore and increasing a speed of the flow of the exhaust gas. The passage extends through the sidewall of the body for fluid communication between the bore and an ambient environment. As such, the increased speed of the flow of the exhaust reduces the pressure and creates a venturi for drawing cool ambient gas into the flow of the hot exhaust gas. In addition to the venturi, the bore and the passage collectively generate a desirable engine exhaust sound when the flow of the exhaust gas passes therethrough.

What is claimed is: 
     
         1 . A device for an exhaust system of a motor vehicle, the exhaust system including an exhaust pipe for receiving a flow of exhaust gas from an engine of the motor vehicle and discharging the flow of exhaust gas into an ambient environment, the device comprising;
 a body having a sidewall and an exhaust conduit extending therethrough;   a baffle wall having at least one bore, the at least one bore in fluid communication with the exhaust conduit extending therethrough for increasing a speed of the flow of exhaust gas through the bore; and   a passage extending through the sidewall of the body from the ambient environment to the bore for fluid communication therebetween,   wherein the bore and the passage are configured to generate a venturi and draw cooler ambient gas through the passage and into the bore.   
     
     
         2 . The device of  claim 1  wherein the baffle wall and the passage are collectively configured to generate a desirable exhaust sound when simultaneously directing the flow of the exhaust gas through the bore and drawing ambient gas into the bore via the venturi. 
     
     
         3 . The device of  claim 1  wherein the passage extends from an ambient port in fluid communication with the ambient gas to an exhaust port in fluid communication with the bore in the baffle wall, and the exhaust port is distally positioned from the ambient port such that the ambient gas moves into the exhaust gas at an angle between 0 and 90 degrees from a direction of the flow of the exhaust gas. 
     
     
         4 . The device of  claim 1  further comprising:
 a plurality of the bores extending through the baffle wall and in fluid communication with the exhaust conduit for directing the flow of exhaust gas through each of the bores and increasing the speed of the flow of exhaust gas through each of the bores; and 
 a plurality of the passages extending through the sidewall of the body from the ambient environment, each of the passages extending to respective bores in the baffle wall for fluid communication therebetween. 
 
     
     
         5 . The device of  claim 4  wherein the plurality of bores are positioned adjacent to the sidewall of the body. 
     
     
         6 . The device of  claim 4  wherein the plurality of bores and the plurality of passages are symmetrically and radially positioned about the baffle wall and sidewall, respectively. 
     
     
         7 . The device of  claim 1  wherein the body has an end portion for fluidly connecting to a portion of the exhaust system. 
     
     
         8 . The device of  claim 7  wherein the body has another end portion for fluidly connecting to a remaining portion of the exhaust system. 
     
     
         9 . A device for an exhaust system of a motor vehicle, the exhaust system including an exhaust pipe for receiving a flow of exhaust gas from an engine of the motor vehicle and discharging the flow of exhaust gas into an ambient environment, the device comprising;
 a body having a sidewall and an exhaust conduit extending therethrough, the body having a distal end portion and a proximal end portion, the proximal end portion having an inlet in fluid communication with the exhaust conduit and configured for connecting to the exhaust pipe to receive the flow of exhaust gas;   a baffle wall having a bore in fluid communication with the exhaust conduit extending therethrough, the baffle wall extending from the sidewall and into the exhaust conduit at the distal end portion for directing the flow of exhaust gas through the bore and increasing a speed of the flow of exhaust gas through the bore; and   a passage extending through the sidewall of the body from the ambient environment to the bore in the baffle wall for fluid communication therebetween,   wherein the bore and the passage are configured to generate a venturi and draw cooler ambient gas through the passage and into the bore from the ambient environment for introducing cooler ambient gas into the flow of the exhaust gas for reducing a temperature of the flow of the exhaust gas through a remaining portion of the exhaust system.   
     
     
         10 . The device of  claim 9  wherein the baffle wall and the passage are collectively configured to generate a desirable exhaust sound when simultaneously directing the flow of the exhaust gas through the bore and drawing ambient gas into the bore via the venturi. 
     
     
         11 . The device of  claim 9  wherein the passage extends from an ambient port in fluid communication with the ambient gas to an exhaust port in fluid communication with the bore in the baffle wall, and the exhaust port is distally positioned from the ambient port such that the ambient gas moves into the exhaust gas at an angle between 0 and 90 degrees from a direction of the flow of the exhaust gas. 
     
     
         12 . The device of  claim 9  wherein the passage extends from an ambient port in fluid communication with the ambient gas to an exhaust port in fluid communication with only the bore such that all of the ambient gas is drawn directly into the bore in the baffle wall. 
     
     
         13 . The device of  claim 9  further comprising:
 a plurality of the bores extending through the baffle wall and in fluid communication with the exhaust conduit for directing the flow of exhaust gas through each of the bores and increasing the speed of the flow of exhaust gas through each of the bores; and 
 a plurality of the passages extending through the sidewall of the body from the ambient environment, each of the passages extending to respective bores in the baffle wall for fluid communication therebetween. 
 
     
     
         14 . The device of  claim 13  wherein the plurality of bores and the plurality of passages are symmetrically and radially positioned about the baffle wall and sidewall, respectively. 
     
     
         15 . The device of  claim 9  wherein the distal end portion has an outlet in fluid communication with the exhaust conduit and configured for connecting to a remaining portion of the exhaust system. 
     
     
         16 . A method of discharging an exhaust gas from an exhaust system of a motor vehicle into an ambient environment, comprising;
 blocking a flow of the exhaust gas with a baffle wall in order to direct the gas through a bore in the baffle wall;   increasing a speed of the flow of the exhaust gas moving into the bore such that a pressure of the flow of the exhaust gas within the bore is reduced to create a venturi at the bore; and   drawing an ambient gas through a passage in a sidewall and into the bore for reducing a temperature of the flow of the exhaust gas.   
     
     
         17 . The method of  claim 16  further comprising:
 generating a desirable exhaust sound when simultaneously directing the flow of the exhaust gas through the bore and drawing ambient gas into the bore via the venturi. 
 
     
     
         18 . The method of  claim 16  further comprising:
 dividing the flow of the exhaust into a plurality of flows of exhaust gas for mixing ambient gas with the exhaust gas. 
 
     
     
         19 . The method of  claim 16  wherein drawing the ambient gas further comprises:
 moving the exhaust gas into the bore at an angle between 0 and 90 degrees from a direction of the flow of the exhaust gas.