Active combustion air intake system for truck, tractor, or bus vehicle

1. A combustion air intake apparatus for a truck, tractor, or bus vehicle for highway use, the combustion air intake apparatus comprising:

a frame defining an air inlet opening in fluid communication with the combustion air intake apparatus;

at least one air deflecting element proximate to the frame, wherein the at least one air deflecting element comprises a retracted position and comprises a deployed position in which the at least one air deflecting element is arranged to deflect air into the air inlet opening while the truck, tractor, or bus vehicle is traveling in a forward direction;

a neck configured to direct air from the air inlet opening to a filter housing containing an air filter of an engine of the truck, tractor, or bus vehicle, wherein the neck is arranged between the at least one air deflecting element and the filter housing; and

a controller operatively coupled with at least one actuator to selectively deploy or retract the at least one air deflecting element, wherein the controller is configured to control deployment or retraction of the at least one air deflecting element responsive to at least one signal indicative of one or more sensed parameters;

wherein the air inlet opening is open to admit ambient air into the combustion air intake apparatus and to supply air through the neck to the filter housing and the air filter when the at least one air deflecting element is in the deployed position and when the at least one air deflecting element is in the retracted position; and

wherein the air inlet opening is arranged generally behind or above a passenger cabin of the truck, tractor, or bus vehicle.

2. The combustion air intake apparatus of claim 1 , wherein the controller is configured to control deployment or retraction of the at least one air deflecting element responsive to at least one signal indicative of at least one of the following parameters (i) to (iii): (i) forward speed of the truck, tractor, or bus vehicle, (ii) air pressure downstream of the air inlet opening, or (iii) throttle position of the truck, tractor, or bus vehicle.

3. The combustion air intake apparatus of claim 2 , wherein the controller is configured to control deployment or retraction of the at least one air deflecting element responsive to one or more signals indicative of at least two of the parameters (i) to (iii).

4. The combustion air intake apparatus of claim 1 , wherein the controller is configured to control deployment or retraction of the at least one air deflecting element responsive to one or more signals indicative of at least one of the following parameters: (A) presence of precipitation proximate to the truck, tractor, or bus vehicle; or (B) presence of particulate material proximate to the truck, tractor, or bus vehicle.

5. The combustion air intake apparatus of claim 1 , wherein the air inlet opening is arranged non-perpendicular to the forward direction of travel of the truck, tractor, or bus vehicle.

6. The combustion air intake apparatus of claim 1 , wherein the at least one air deflecting element comprises at least one moveable deflector plate or flap arranged proximate to the air inlet opening.

7. The combustion air intake apparatus of claim 6 , wherein the at least one moveable deflector plate or flap is arranged generally behind the air inlet opening, relative to the forward direction of travel of the truck, tractor, or bus vehicle, when the at least one moveable deflector plate or flap is in a non-deployed or retracted state.

8. The combustion air intake apparatus of claim 1 , wherein the at least one air deflecting element comprises a plurality of louvers arranged proximate to the air inlet opening.

9. The combustion air intake apparatus of claim 1 , wherein the at least one air deflecting element comprises a moveable duct portion configured to alter an angular position of the air inlet opening.

10. A method of supplying combustion air to a truck, tractor, or bus vehicle for highway use, the method comprising:

utilizing a controller operatively coupled with at least one actuator to selectively deploy or retract at least one air deflecting element proximate to a frame defining an air inlet opening, wherein the at least one air deflecting element comprises a retracted position and comprises a deployed position in which the at least one air deflecting element is arranged to deflect air into the air inlet opening while the truck, tractor, or bus vehicle is traveling in a forward direction;

wherein selective deployment or retraction of the at least one air deflecting element is responsive to at least one signal indicative of one or more sensed parameters; and

wherein the air inlet opening is open to admit ambient air into a combustion air intake apparatus and to supply air through a neck to a filter housing containing an air filter of an engine of the truck, tractor, or bus vehicle when the at least one air deflecting element is in the deployed position and also when the at least one air deflecting element is in the retracted position;

wherein the neck is arranged between the at least one air deflecting element and the filter housing

wherein the air inlet opening is arranged generally behind or above a passenger cabin of the truck, tractor, or bus vehicle.

11. The method of claim 10 , wherein said selective deployment or retraction of the at least one air deflecting element is responsive to one or more signals indicative of at least one of the following parameters (i) to (iii): (i) forward speed of the truck, tractor, or bus vehicle; (ii) air pressure downstream of the air inlet opening, or (iii) throttle position of the truck, tractor, or bus vehicle.

12. The method of claim 11 , wherein said selective deployment or retraction of the at least one air deflecting element is responsive to one or more signals indicative of at least two of the parameters (i) to (iii).

13. The method of claim 11 , further comprising monitoring at least one of the parameters (i) to (iii).

14. The method of claim 10 , wherein said deployment or retraction of the at least one air deflecting element is responsive to one or more signals indicative of at least one of the following parameters: (A) presence of precipitation proximate to the truck, tractor, or bus vehicle; or (B) presence of particulate material proximate to the truck, tractor, or bus vehicle.

15. The method of claim 10 , wherein the air inlet opening is arranged non-perpendicular to the forward direction of travel of the truck, tractor, or bus vehicle.

16. The method of claim 10 , wherein the at least one air deflecting element comprises at least one moveable deflector plate or flap arranged proximate to the air inlet opening.

17. The method of claim 10 , wherein the at least one air deflecting element comprises a plurality of louvers arranged proximate to the air inlet opening.

18. The method of claim 10 , wherein the at least one air deflecting element comprises a moveable duct portion configured to alter an angular position of the air inlet opening.