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An exhaust gas recirculation system for an engine positioned in an engine compartment of a vehicle is provided. The system comprises an exhaust gas recirculation cooler positioned in an exhaust gas path of the engine; and an exhaust gas recirculation valve positioned upstream of the cooler in the ex

An exhaust gas recirculation system for an engine positioned in an engine compartment of a vehicle is provided. The system comprises an exhaust gas recirculation cooler positioned in an exhaust gas path of the engine; and an exhaust gas recirculation valve positioned upstream of the cooler in the exhaust gas path and spatially adjacent a side of the cooler that is exposed to decreased ambient temperature in the engine compartment during engine powered vehicle travel.

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The invention claimed is: 1. An exhaust gas recirculation system for an engine positioned in an engine compartment of a vehicle, the system comprising: an exhaust gas recirculation cooler positioned in an exhaust gas path of the engine, the exhaust gas recirculation cooler including a cooler inlet

The invention claimed is: 1. An exhaust gas recirculation system for an engine positioned in an engine compartment of a vehicle, the system comprising: an exhaust gas recirculation cooler positioned in an exhaust gas path of the engine, the exhaust gas recirculation cooler including a cooler inlet and a cooler outlet, both located at a front side of the exhaust gas recirculation cooler; and an exhaust gas recirculation valve positioned upstream of the cooler in the exhaust gas path and spatially adjacent a side of the cooler that is exposed to decreased ambient temperature in the engine compartment during engine powered vehicle travel. 2. The exhaust gas recirculation system of claim 1, wherein a front of the engine compartment experiences decreased ambient temperature relative to a rear of the engine compartment during engine powered vehicle travel, and wherein the exhaust gas recirculation valve is positioned spatially adjacent a front side of the cooler, which is positioned closer to the front of the engine compartment than the rear of the engine compartment. 3. The exhaust gas recirculation system of claim 1, further comprising a bypass flow path configured to guide exhaust gas around the cooler, the bypass flow path including a bypass valve configured to regulate the flow of exhaust gas through the bypass flow route. 4. The exhaust gas recirculation system of claim 3, wherein the bypass valve is located adjacent to the exhaust gas recirculation valve. 5. The exhaust gas recirculation system of claim 3, wherein the bypass valve is operatively coupled with the exhaust gas recirculation valve wherein the bypass valve is configured to enable the exhaust stream to bypass the exhaust gas recirculation cooler in an open state and enable the exhaust stream to pass the cooling portions of the exhaust gas recirculation cooler in a closed state. 6. The exhaust gas recirculation system of claim 2, wherein the exhaust gas recirculation system further comprises a control system operating the exhaust gas recirculation valve and the bypass valve to enable the exhaust gas to flow along the recirculation flow path at a first engine operating condition and flow along the bypass flow path at a second engine operating condition. 7. The exhaust gas recirculation system of claim 6, wherein the second engine operating condition is one of a cold ambient temperature operation and an extended idle operation. 8. The exhaust gas recirculation system of claim 1, wherein the cooler is substantially U-shaped. 9. The exhaust gas recirculation system of claim 1, wherein the exhaust gas recirculation valve is integrated in a housing of the exhaust gas recirculation cooler. 10. The exhaust gas recirculation system of claim 9, wherein the exhaust gas recirculation valve and the bypass valve are located in a housing of the exhaust gas recirculation cooler and a portion of the housing is configured to be the bypass flow path. 11. The exhaust gas recirculation system of claim 10, wherein the housing further includes an inlet passage that travels from a rear side of the cooler to the inlet at the front side of the cooler. 12. The exhaust gas recirculation system of claim 10, wherein the inlet passage travels through the cooler for the length of the cooler. 13. The exhaust gas recirculation system of claim 9, wherein the housing further includes an outlet passageway extending from the outlet on the front side of the cooler. 14. The exhaust gas recirculation system of claim 1, wherein the exhaust gas recirculation system further comprises an exhaust gas recirculation catalyst upstream of the exhaust gas recirculation cooler. 15. A system for a vehicle, comprising: an engine compartment having a front at a front of the vehicle, and a rear toward a rear of the vehicle; an engine mounted longitudinally in the engine compartment; an exhaust gas recirculation system for the engine, where heat generated during operation of the engine and cooling air flowing into the engine compartment through a vent during vehicle travel combine to produce a temperature gradient within the engine compartment between a region of higher ambient temperature adjacent the engine in the rear and a region of lower ambient temperature adjacent the vent toward the front, the exhaust gas recirculation system including an exhaust gas recirculation valve positioned in an exhaust gas flow path of the engine and an exhaust gas recirculation cooler positioned along the exhaust gas flow path, wherein the exhaust gas recirculation cooler includes a front end and a rear end, the rear end being positioned closer to a region of increased temperature of the engine compartment than the front end, wherein the exhaust gas recirculation valve is positioned within the exhaust gas path upstream of the cooler; and wherein the exhaust gas recirculation valve is positioned adjacent the front end of the exhaust gas recirculation cooler. 16. The system of claim 15, wherein the exhaust gas recirculation system further comprises an exhaust gas bypass valve that is operatively coupled to the exhaust gas recirculation valve to enable the exhaust stream to bypass the exhaust gas recirculation cooler in an open state and enable the exhaust stream pass the cooling portions of the exhaust gas recirculation cooler in a closed state. 17. The system of claim 16, wherein the front end of the exhaust gas recirculation cooler includes a housing wherein the exhaust gas recirculation valve and the exhaust gas bypass valve are disposed inside the housing. 18. The system of claim 17, wherein a portion of the housing forms an exhaust gas bypass flow path when the exhaust gas bypass valve is in the open state, and wherein the cooler is U-shaped. 19. An exhaust gas recirculation system, comprising: an exhaust gas recirculation cooler having cooling portions in communication with engine coolant; an exhaust gas recirculation valve integrated inside a housing of the exhaust gas recirculation cooler, wherein the exhaust gas recirculation valve is disposed upstream of an exhaust stream entering the exhaust gas recirculation cooling portions and is positioned adjacent to an outlet of exhaust gas from the exhaust recirculation cooling portions; a bypass flow path that at least is partially inside the housing of the exhaust gas recirculation cooler; and a bypass valve adjacent to the exhaust gas recirculation valve. 20. The system of claim 19 where the exhaust gas recirculation cooler includes a cooler inlet and a cooler outlet, both located at a front side of the exhaust gas recirculation cooler.