Extraction device for a motor vehicle

Abstract

An extraction device is provided for a motor vehicle, in particular for a motor bike or for a motor vehicle similar to a motor bike. The extraction device includes at least one duct-like air-guide which has at least one opening which is arranged in or at an exhaust-air region of a ventilated vehicle component of the motor vehicle, such as engine, gearbox or the like, and which is extended between the used-air region of the vehicle component and a rear wheel of the motor vehicle, and at least one suction apparatus which is connectable or is connected to the air-guide and in which a negative pressure can be produced in order to suck air out of the exhaust-air region via the at least one air-guide.

Claims

1. An extraction device for a motor vehicle, comprising: an air-guide which has at least one opening arranged in or at an exhaust-air region of a ventilated vehicle component of the motor vehicle, wherein the air-guide extends between the exhaust-air region of the vehicle component and a rear wheel of the motor vehicle; and at least one suction device which is connectable to the air-guide and in which a negative pressure is generated in order to suck air out of the exhaust-air region via the air-guide; wherein the suction device comprises a suction duct which is substantially enclosed and formed by a cover and by a portion of an outer surface of the rear wheel; wherein the air-guide is formed and substantially enclosed by a portion of an upper covering part and by a portion of a lower covering part of the cover and wherein the portion of the upper covering part and the portion of the lower covering part define a duct that extends away from the rear wheel and toward the ventilated vehicle component; wherein air can be supplied into the suction duct via an inlet opening by rotation of the rear wheel, wherein said air is movable in the suction duct over a path which is substantially concentric to the rear wheel and is dischargeable again via an outlet opening; wherein the suction duct of the suction device comprises at least one Portion which is formed as a mixing chamber, is arranged between the inlet opening and the outlet opening, and in which the air-guide opens into the suction duct; wherein the upper covering part extends from the inlet opening of the suction duct to the mixing chamber and is arranged substantially above the rear wheel on its side opposite to a roadway, and wherein the lower covering part extends from the mixing chamber to the outlet opening of the suction duct and is arranged on a side of the rear wheel that faces a front wheel.

2. The extraction device as claimed in claim 1, wherein the motor vehicle is a motor bike or a vehicle similar to a motor bike.

3. The extraction device as claimed in claim 1, wherein the suction duct comprises, between the inlet opening and the mixing chamber, a region having a cross section which tapers in the direction of movement of the air, said region having a narrowest cross section adjoining the mixing chamber.

4. The extraction device as claimed in claim 1, wherein the air-guide opens into the mixing chamber of the suction duct, transversely, obliquely or tangentially to the path of the suction duct that is concentric to the rear wheel, and/or the air-guide has a cross section which is constant from the opening in the direction of the mixing chamber, which continuously tapers or which comprises a first region in which it continuously tapers and a second region in which it continuously widens.

5. The extraction device as claimed in claim 1, wherein the cover extends to the widest point of the rear wheel and laterally reaches over the rear wheel at its widest point.

6. The extraction device as claimed in claim 1, wherein the cover is fastenable to a rear wheel swing arm of the motor vehicle.

7. The extraction device as claimed in claim 1, wherein the opening in the air-guide takes the form of an intake or funnel, and a suction direction in which the air is sucked out of the exhaust-air region extends transversely, obliquely or parallel to a direction of travel of the motor vehicle.

8. The extraction device as claimed in claim 1, wherein the outlet opening of the suction duct at an end of the lower covering part that faces a roadway is spaced apart from the roadway so as to have a defined clearance from the roadway.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a first exemplary embodiment of the extraction device.

(2) FIG. 2 shows a second exemplary embodiment of the extraction device.

(3) FIG. 3 shows a third exemplary embodiment of the extraction device.

DETAILED DESCRIPTION OF THE DRAWINGS

(4) FIGS. 1 to 3 show exemplary embodiments of an extraction device, provided overall with the reference sign 2, for a motor vehicle 4 (only schematically illustrated in the figures). The motor vehicle 4 illustrated in the figures comprises a motor bike or a motor vehicle 4 similar to a motor bike.

(5) The extraction device 2 comprises at least one duct-like air-guide 6 which has at least one opening 8. The air-guide 6 is arranged with the opening 8 in an exhaust-air region 10 of a ventilated vehicle component 12 of the motor vehicle 4. By means of the opening 8, air can be sucked out of the exhaust-air region 10 via the air-guide 6. In the exemplary embodiments shown in the figures, the air-guide 6 extends from the vehicle component 12 to be vented, in particular from its exhaust-air region 10, in the direction of a rear wheel 14 of the motor vehicle 4.

(6) Moreover, the extraction device 2 comprises a suction device 16 which is connected to the air-guide and in which a negative pressure can be generated with respect to the exhaust-air region 10. By means of the suction device 16, air can be sucked out of the exhaust-air region 10 through the air-guide 6 and the exhaust-air region 10 can thereby be vented.

(7) The suction device 16 of the exemplary embodiments shown in the figures in each case comprises a suction duct 18. The latter is formed by a cover 20 and by a portion 22 of an outer surface of the rear wheel 14 and at least virtually completely enclosed by both. Rotation of the rear wheel 14 causes air to be fed into the suction duct 18 via an inlet opening 24 and to be discharged from the suction duct 18 via an outlet opening 26.

(8) Moreover, the suction ducts 18 shown in the figures in each case comprise a portion which is designed as a mixing chamber 28, is arranged between the inlet opening 24 and the outlet opening 26 and into which the air-guide 6 opens.

(9) The cover 20 comprises an upper covering part 30 which extends substantially from the inlet opening 24 to the mixing chamber 28 and is arranged above the rear wheel 14 on its side opposite to a roadway 32, and a lower covering part 34 which extends substantially from the mixing chamber 28 to the outlet opening 26 and which is arranged on a side of the rear wheel 14 that faces a front wheel 36.

(10) FIG. 1 shows a first exemplary embodiment of the extraction device 2. In this, the opening 8 takes the form of an intake or funnel. The air-guide 6 extends from the opening 8 in the direction of the mixing chamber 28 at first by a first region 38 which comprises a continuously tapering cross section, and by a second region 40 which adjoins this and comprises a continuously widening cross section.

(11) The opening 8 of the air-guide 6 is arranged obliquely to the direction of travel 42, with the result that the suction direction 44 likewise extends obliquely to the direction of travel 42.

(12) It is evident from the arrangement according to FIG. 1 that the air-guide 6 opens into the mixing chamber 28 perpendicularly to the concentric path of the suction duct 18.

(13) FIG. 2 shows a second exemplary embodiment of the extraction device 2. In this, the opening 8 likewise takes the form of an intake or funnel. The air-guide 6 extends from the opening 8 in the direction of the mixing chamber 28 with a continuously tapering cross section.

(14) The opening 8 of the air-guide 6 is formed obliquely to the direction of travel 42, with the result that the suction direction 44 likewise extends obliquely to the direction of travel 42.

(15) It is evident from the arrangement according to FIG. 2 that the air-guide 6 opens into the mixing chamber 28 obliquely to the concentric path of the suction duct 18.

(16) FIG. 3 shows a third exemplary embodiment of the extraction device 2. In this, the opening 8 likewise takes the form of an intake or funnel and extends over the entire height of the vehicle component 12. The air-guide 6 extends from the opening 8 in the direction of the mixing chamber 28 at first with a continuously tapering cross section.

(17) The opening 8 of the air-guide 6 is formed in the direction of travel 42. The air-guide 6 extends substantially perpendicularly to the direction of travel 42.

(18) It is evident from the arrangement according to FIG. 3 that the air-guide 6 opens into the mixing chamber 28 tangentially to the concentric path of the suction duct 18.

(19) The mode of operation of the extraction device will be described below.

(20) During operation of the motor vehicle, the rear wheel 14 is set in a rotational movement. Within the suction duct 18, the air present there is moved by the rotation of the rear wheel 14 and moved in the direction of the outlet opening 26.

(21) The movement of the air increases the dynamic pressure component in the air in the suction duct, the static pressure component dropping. As soon as the static pressure component in the mixing chamber 28 has dropped below the value of the static pressure component in the exhaust-air region 10, air flows out of the exhaust-air region 10 via the air-guide 6 into the extraction device 2.

LIST OF REFERENCE SIGNS

(22) 2 Extraction device 4 Motor vehicle 6 Air-guide 8 Opening 10 Exhaust-air region 12 Vehicle component 14 Rear wheel 16 Suction device 18 Suction duct 20 Cover 22 Portion 24 Inlet opening 26 Outlet opening 28 Mixing chamber 30 Upper covering part 32 Roadway 34 Lower covering part 36 Front wheel 38 First region 40 Second region 42 Direction of travel 44 Suction direction

(23) The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.