Claims
- 1. An in-line exhaust system for a v-configured, transverse-mounted internal combustion engine having a front and rear manifold, the front having a first exhaust gas stream and the rear having a second exhaust gas stream, the exhaust system comprising:
- a first passage for the first exhaust gas stream;
- a second passage for the second exhaust gas stream having a catalyst system disposed therein;
- an adsorber structure having an inlet and outlet end, a desorption temperature and comprising a first substantially unobstructed flow region, and a second more obstructed flow region abutting the first region, the adsorber being positioned so that both the first and second exhaust gas streams flow therethrough;
- a fluidics diverter disposed in the second exhaust gas stream upstream, and proximate to the first region, of the adsorber for diverting the second exhaust gas stream away from said first region;
- a burn-off catalyst disposed downstream from the adsorber.
- 2. An exhaust system according to claim 1 wherein the catalyst system comprises a series of close-coupled catalysts positioned adjacent each other.
- 3. An exhaust system according to claim 1 wherein the catalyst system comprises a single close-coupled catalyst.
- 4. An exhaust system according to claim 1 wherein the catalyst system comprises a single main catalyst.
- 5. An exhaust system according to claim 4 wherein the second exhaust passage is positioned to cause the second exhaust gas stream to flow through a central portion of the main catalyst and the first exhaust gas passage is positioned to cause the first exhaust gas stream to flow through the peripheral portion of the main catalyst.
- 6. A method of treating the exhaust of a v-configured, transverse-mounted internal combustion engine having a front and rear manifold, the front having a first exhaust gas stream and the rear having a second exhaust gas stream, comprising:
- (a) causing the first exhaust stream gas to flow through an adsorber having an inlet and outlet, a desorption temperature, and a first substantially unobstructed flow region, and a second more obstructed flow region abutting the first region, whereby the first exhaust stream gas is caused to flow through the second more obstructed region of whereupon the adsorber adsorbs hydrocarbons from the first exhaust gas stream;
- (b) causing the second exhaust gas stream to flow through a catalyst system and activating a fluidics diverter which causes the second exhaust stream to flow through the second region of the adsorber structure whereby the adsorber adsorbs the hydrocarbons in the second exhaust stream;
- (c) causing the first and second exhaust gas stream to flow through a burnoff catalyst having a lightoff temperature;
- (d) after lightoff of the catalyst system, deactivating the fluidics diverter, thereby causing a substantial portion of the second exhaust gas stream to flow towards, and into the first region of the adsorber;
- (e) after lightoff of the burn-off catalyst desorbing the adsorbed hydrocarbons of the first and second exhaust gas stream.
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/051,122, filed Jun. 27, 1997, entitled IN-LINE EXHAUST SYSTEM FOR A TRANSVERSE MOUNTED V-ENGINE, by Leslie E. Hampton.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
4127633 |
Feb 1993 |
DEX |