초록 ▼

A vehicle includes an engine generating exhaust gas flow and a vehicle body having a first body end facing oncoming ambient airflow when the vehicle is in motion and an opposite second body end. A vehicle underbody section spans a distance between the first and second body ends. A diffuser disposed

A vehicle includes an engine generating exhaust gas flow and a vehicle body having a first body end facing oncoming ambient airflow when the vehicle is in motion and an opposite second body end. A vehicle underbody section spans a distance between the first and second body ends. A diffuser disposed at the second body end controls an underbody airflow portion past the second body end. An exhaust duct discharges the exhaust gas via a duct outlet arranged between the underbody section and the diffuser. A first diffuser aperture aligns with the duct outlet for discharging the exhaust gas from the outlet to the ambient. A second diffuser aperture pulls at least a fraction of the underbody airflow over the duct outlet and through the first aperture. The first and second apertures accelerate the pulled underbody airflow to increase a downforce on the vehicle body at the second body end.

대표청구항 ▼

1. A vehicle comprising: an internal combustion engine generating a flow of exhaust gas as a product of combustion;a vehicle body arranged along a longitudinal axis and having a first vehicle body end configured to face oncoming ambient airflow, a second vehicle body end opposite of the first vehicl

1. A vehicle comprising: an internal combustion engine generating a flow of exhaust gas as a product of combustion;a vehicle body arranged along a longitudinal axis and having a first vehicle body end configured to face oncoming ambient airflow, a second vehicle body end opposite of the first vehicle body end, and a vehicle underbody section configured to span a distance between the first and second vehicle body ends;a diffuser having a diffuser body disposed at the second vehicle body end and configured to control an underbody portion of the airflow past the second vehicle body end; andan exhaust duct extending along the underbody section, having a duct inlet configured to receive the flow of exhaust gas from the engine, and a duct outlet arranged between the vehicle underbody section and the diffuser and configured to discharge the flow of exhaust gas to the ambient;wherein the diffuser body defines: a first aperture configured to align with the duct outlet and facilitate the discharge of the flow of exhaust gas from the duct outlet to the ambient at the second vehicle body end; anda second aperture arranged along the longitudinal axis between the first vehicle body end and the duct outlet and configured to pull at least a fraction of the underbody portion of the airflow over the duct outlet and through the first aperture out to the ambient, to thereby accelerate the at least a fraction of the underbody portion of the airflow and increase a downforce on the vehicle body at the second body end. 2. The vehicle of claim 1, wherein the diffuser includes a fin arranged longitudinally relative to the vehicle body and configured to direct the underbody portion of the airflow to the ambient at the second vehicle body end. 3. The vehicle of claim 1, wherein the first aperture is arranged aft of the duct outlet, between the duct outlet and the second vehicle body end. 4. The vehicle of claim 1, wherein the second aperture is arranged between the first aperture and the first vehicle body end. 5. The vehicle of claim 1, wherein the diffuser body covers at least a portion of the duct outlet. 6. The vehicle of claim 1, wherein the diffuser body is attached to the vehicle body via a fastener. 7. The vehicle of claim 1, wherein the first aperture has an oval shape. 8. The vehicle of claim 1, wherein the second aperture has a rectangular shape. 9. A diffuser for a vehicle having: an internal combustion engine generating a flow of exhaust gas as a product of combustion;a vehicle body arranged along a longitudinal axis and having a first vehicle body end configured to face oncoming ambient airflow, a second vehicle body end opposite of the first vehicle body end, and a vehicle underbody section configured to span a distance between the first and second vehicle body ends; andan exhaust duct extending along the underbody section, having a duct inlet configured to receive the flow of exhaust gas from the engine, and a duct outlet arranged proximate the second vehicle body end and configured to discharge the flow of exhaust gas to the ambient;the diffuser comprising a diffuser body disposed at the second vehicle body end and configured to control an underbody portion of the airflow past the second vehicle body end;wherein the diffuser body defines: a first aperture configured to align with the duct outlet and facilitate the discharge of the flow of exhaust gas from the duct outlet to the ambient at the second vehicle body end; anda second aperture arranged along the longitudinal axis between the first vehicle body end and the duct outlet and configured to pull at least a fraction of the underbody portion of the airflow over the duct outlet and through the first aperture out to the ambient, to thereby accelerate the at least a fraction of the underbody portion of the airflow and increase a downforce on the vehicle body at the second body end. 10. The diffuser of claim 9, wherein the diffuser includes a fin arranged longitudinally relative to the vehicle body and configured to direct the underbody portion of the airflow to the ambient at the second vehicle body end. 11. The diffuser of claim 9, wherein the first aperture is arranged aft of the duct outlet, between the duct outlet and the second vehicle body end. 12. The diffuser of claim 9, wherein the second aperture is arranged between the first aperture and the first vehicle body end. 13. The diffuser of claim 9, wherein the diffuser body covers at least a portion of the duct outlet. 14. The diffuser of claim 9, wherein the diffuser body is attached to the vehicle body via a fastener. 15. The diffuser of claim 9, wherein the first aperture has an oval shape. 16. The diffuser of claim 9, wherein the second aperture has a rectangular shape. 17. A vehicle comprising: an internal combustion engine generating a flow of exhaust gas as a product of combustion;a vehicle body arranged along a longitudinal axis and having a first vehicle body end configured to face oncoming ambient airflow, a second vehicle body end opposite of the first vehicle body end, and a vehicle underbody section configured to span a distance between the first and second vehicle body ends;a diffuser having a diffuser body disposed at the second vehicle body end and configured to control an underbody portion of the airflow past the second vehicle body end; andan exhaust duct extending along the underbody section, having a duct inlet configured to receive the flow of exhaust gas from the engine, and a duct outlet arranged between the vehicle underbody section and the diffuser and configured to discharge the flow of exhaust gas to the ambient;wherein the diffuser body defines: a first aperture arranged aft of the duct outlet, between the duct outlet and the second body end, and configured to align with the duct outlet and facilitate the discharge of the flow of exhaust gas from the duct outlet to the ambient at the second vehicle body end; anda second aperture arranged along the longitudinal axis between the first vehicle body end and the duct outlet and arranged between the first aperture and the first vehicle body end and configured to pull at least a fraction of the underbody portion of the airflow over the duct outlet and through the first aperture out to the ambient, to thereby accelerate the at least a fraction of the underbody portion of the airflow and increase a downforce on the vehicle body at the second body end. 18. The vehicle of claim 17, wherein the diffuser includes a plurality of fins arranged longitudinally relative to the vehicle body and configured to direct the underbody portion of the airflow to the ambient at the second vehicle body end. 19. The vehicle of claim 17, wherein the diffuser body covers at least a portion of the duct outlet. 20. The vehicle of claim 17, wherein the first aperture has an oval shape and the second aperture has a rectangular shape.