Cab-mounted exhaust pipe for a vehicle

Abstract

Driver's cab (F) for a commercial vehicle, with an exhaust pipe (1) and a chassis-fixed component (2) via which exhaust gas can be conducted into the exhaust pipe (1), wherein the exhaust pipe (1) is arranged so as to be fixed to the driver's cab, characterized in that the exhaust pipe (1) and the chassis-fixed component (2) are operatively connected to one another via an open and / or contactless transition (3.2) and the chassis-fixed component (2) is spaced apart from the exhaust pipe (1) in the longitudinal direction.

Description

[0001] The invention relates to a driver's cab for a commercial vehicle with an exhaust pipe which expediently extends outside, adjacent to the driver's cab (e.g. behind or to the side of the driver's cab), preferably substantially vertically.

[0002] It is known in the art to arrange vertically extending exhaust pipes adjacent to the cabs of trucks. Such exhaust pipes are typically secured to the chassis via a solid frame structure mounted on the chassis. The disadvantage of this is, on the one hand, that the frame structure must be constructed solidly, which is associated with high costs and high weight. On the other hand, the disadvantage is that, despite the solid frame construction, in practice, the exhaust pipes sometimes break or are otherwise damaged due to vibrations, oscillations, impacts, etc.

[0003] US 2012 / 0 102 918 A1 discloses a skid steer loader. The skid steer loader has an operator's cage and an engine compartment. The operator's cage and the engine compartment are supported by a machine frame. The engine compartment has an exhaust port including a venturi opening.

[0004] US 2011 / 0 101 683 A1 relates to an exhaust pipe decoupler for a vehicle having a chassis and a cab attached to the chassis. The exhaust pipe decoupler comprises a first conduit connected to the chassis and a second conduit connected to the cab. The first conduit comprises an inlet section, a tapered transition section, and an outlet section with a smaller internal cross-sectional area than the inlet section. The second conduit comprises an inlet section, a tapered transition section, and an outlet section such that the inlet section has a larger internal cross-sectional area than the outlet section.

[0005] DE 10 2011 014 908 A1 relates to a tailpipe arrangement for a vehicle exhaust system, in which an inlet is provided through which ambient air can be introduced into the exhaust stream to cool the exhaust stream. The tailpipe arrangement comprises a first pipe, which is partially inserted into an inlet opening of a second pipe in the direction of exhaust flow, wherein the inlet for the ambient air is provided by a gap formed between the two pipes.

[0006] An object of the invention is to provide a possibility by means of which a lightweight, cost-effective, easy-to-assemble and / or less prone to damage assembly of a raised exhaust pipe can be achieved.

[0007] This object can be achieved with the features of the main claim. Advantageous developments of the invention can be found in the subclaims and the following description of preferred embodiments of the invention.

[0008] The invention provides a driver's cab for a commercial vehicle, preferably a truck, in particular a tractor unit. The driver's cab expediently has an exhaust pipe on the outside and a chassis-mounted component through which exhaust gas can be directed into the exhaust pipe.

[0009] The exhaust pipe is preferably arranged externally adjacent to the driver's cab (e.g., behind or to the side of the cab) and / or extends substantially vertically. The exhaust pipe is preferably a so-called raised exhaust pipe. The exhaust pipe is characterized in particular by being fixed to the driver's cab and thus expediently coupled to the movements of the driver's cab.

[0010] Because the exhaust pipe is mounted on the cab instead of the usual chassis frame, the otherwise massive frame structure supporting the exhaust pipe is no longer required. The chassis and its attachments can remain variant-free, as no additional brackets are required.

[0011] It is possible for the exhaust pipe and the chassis-mounted component to be motion-decoupled. This effectively prevents oscillations, vibrations, shocks, etc. from being transmitted from the chassis-mounted component to the exhaust pipe, or only to a greatly reduced extent. The motion-decoupling, in particular the space provided between the chassis-mounted component and the exhaust pipe, is effectively designed so that cab and / or chassis movements can be absorbed or compensated for. This results in the exhaust pipe being less likely to break or otherwise be damaged due to vibrations, shocks, oscillations, etc.

[0012] It is possible for the exhaust pipe and the chassis-fixed component to be operatively connected to one another via a flexible element, with the flexible element expediently ensuring decoupling of movement. The flexible element can be connected, on the one hand, to the chassis-fixed component and, on the other hand, to the exhaust pipe. Between the chassis-fixed component and the exhaust pipe, relative movements in the longitudinal direction and / or in the radial direction (preferably in all three spatial directions) can expediently be enabled by means of the flexible element. In other words, the chassis-fixed component can preferably move essentially freely relative to the exhaust pipe or vice versa.

[0013] The exhaust pipe is mounted to the driver's cab and is decoupled from noise and / or vibration using damping elements (e.g. rubber elements).

[0014] The flexible element is preferably bellows-shaped.

[0015] The exhaust pipe and the chassis-fixed component are operatively connected to one another via an open and / or contactless transition. It is possible that the open and / or contactless transition expediently ensures the decoupling of movement. This particularly includes embodiments in which the chassis-fixed component and the exhaust pipe do not come into contact. According to the invention, this particularly includes embodiments in which the chassis-fixed component and the exhaust pipe are spaced apart from one another in the longitudinal direction and / or radial direction. Relative movements in the longitudinal direction and / or radial direction (preferably in all three spatial directions) can thus be expediently enabled between the chassis-fixed component and the exhaust pipe. In other words, the chassis-fixed component can preferably move freely relative to the exhaust pipe or vice versa.

[0016] The chassis-mounted component can extend into the exhaust pipe so that the chassis-mounted component and the exhaust pipe overlap. The chassis-mounted component must be spaced longitudinally from the exhaust pipe.

[0017] It is possible for the chassis-fixed component to protrude into the exhaust pipe, but to remain spaced apart from the exhaust pipe in the radial direction in order to be freely movable within the exhaust pipe in the longitudinal direction and / or in the radial direction.

[0018] The exhaust pipe may have a funnel at the bottom, particularly in the transition area between the chassis-fixed component and the exhaust pipe.

[0019] It's possible that the chassis-mounted component and the exhaust pipe are connected in such a way that a Venturi effect is created. The Venturi effect can, in particular, ensure that no unwanted exhaust gases escape through the open and / or contactless transition.

[0020] In the transition region between the exhaust pipe and the chassis-mounted component, the diameter of the exhaust pipe is preferably larger than the diameter of the chassis-mounted component, so that the exhaust pipe and the chassis-mounted component are radially spaced from one another. It is possible for the exhaust pipe and the chassis-mounted component to overlap in the longitudinal direction or not to overlap. However, the diameter of the exhaust pipe is preferably tapered again downstream of the transition region, i.e., advantageously smaller than in the transition region, e.g., essentially the same size as the diameter of the chassis-mounted component.

[0021] The exhaust pipe can advantageously have a collecting ring at the bottom for running down condensate. The collecting ring preferably has a circumferential groove for the condensate.

[0022] It is possible for the exhaust pipe to expediently protrude upwards above the roof of the driver's cab and / or to extend essentially vertically behind or to the side of the driver's cab, at least in sections.

[0023] It should be noted that the longitudinal direction and / or radial direction appropriately refer to the exhaust pipe and / or the chassis-fixed component.

[0024] It should also be mentioned that the chassis-fixed component can be, for example, an exhaust muffler or a tubular component.

[0025] The invention is not limited to a driver's cab, but also includes a commercial vehicle, preferably a truck, in particular a tractor unit, with a driver's cab as disclosed herein.

[0026] The previously described preferred embodiments and features of the invention can be combined with one another. Other advantageous developments of the invention are disclosed in the subclaims or emerge from the following description of preferred embodiments of the invention in conjunction with the accompanying figures. Fig. 1 shows a schematic perspective view of a driver’s cab according to a prior art, Fig. Figure 2 shows a schematic view of a detail according to an embodiment of the invention and Fig. 3 shows a schematic view of a detail (not an embodiment of the invention).

[0027] The embodiments described with reference to the figures partially correspond, so that similar or identical parts are provided with the same reference numerals and for their explanation reference is made to the description of the other embodiments or figures in order to avoid repetition.

[0028] Fig. 1 shows a schematic perspective view from the rear left of a driver's cab F for a commercial vehicle, in particular a semitrailer tractor. Extending essentially vertically from the outside of the driver's cab F is a so-called raised exhaust pipe 1, which preferably extends upwards beyond the roof of the driver's cab F. The exhaust pipe 1 is connected to a component 2. Exhaust gas from an internal combustion engine is conducted via the component 2 into the exhaust pipe 1 and from there into the open air. The component 2 can be, for example, an exhaust silencer or a part connected to it (e.g., a pipe, a connecting flange, etc.).

[0029] The component 2 is arranged on the chassis (chassis, not shown) of the driver's cab F or generally of the commercial vehicle, which is schematically shown in Fig. 1 is indicated by the arrow pointing downwards toward the chassis. Component 2 is thus coupled to the movements of the chassis.

[0030] The exhaust pipe 1 is not fixed to the chassis, but to the driver's cab, e.g. indirectly held via one or more mounting devices on the driver's cab 1 or directly attached to the driver's cab (e.g. vibration and noise decoupled with rubber elements, screwed, welded, glued, etc.), which is shown schematically in Fig. 1 is indicated by the two horizontal arrows pointing towards the driver's cab 1. The exhaust pipe 1 is thus coupled to the movements of the driver's cab 1.

[0031] The exhaust pipe 1 and the chassis-fixed component 2 are decoupled from movement, in particular in such a way that movements and thus, for example, oscillations, shocks, vibrations, etc. are not transmitted or are at least transmitted to a greatly reduced extent from the chassis-fixed component 2 to the exhaust pipe 1 fixed to the driver's cab, or vice versa.

[0032] The detail D1 in Fig. 1 shows that the movement decoupling between the exhaust pipe 1 and the component 2 in their transition area Ü can be realized via a flexible, preferably bellows-shaped element 3.1, which is coupled between the exhaust pipe 1 and the component 2.

[0033] Fig. 2 schematically shows a detail D2 alternative to detail D1 according to an embodiment of the invention.

[0034] Detail D2 shows an embodiment in which the exhaust pipe 1 and the component 2 are operatively connected to each other via an open and / or contactless transition 3.2. The exhaust pipe 1 and the component 2 are spaced apart from each other in the longitudinal direction of the exhaust pipe 1.

[0035] The exhaust pipe 1 is provided with a funnel 4 in the transition area Ü. Furthermore, it includes a collecting ring 5 with a collecting channel at the bottom to collect condensate to prevent it from escaping when the engine is shut down. The collected condensate evaporates as soon as warm exhaust gases are again passed through the exhaust pipe 1.

[0036] Fig. Figure 3 shows schematically an alternative detail D3 to details D1 and D2.

[0037] The detail D3 also shows an embodiment in which the exhaust pipe 1 and the component 2 are operatively connected to one another via an open and / or contactless transition 3.2.

[0038] A special feature of the Fig. 3 is that the component 2 projects into the exhaust pipe 1, but remains spaced apart from the exhaust pipe 1 in the radial direction, so that a radial gap and at the same time an overlap is created between the exhaust pipe 1 and the component 2.

[0039] Another special feature of the Fig. The advantage of the details D3 shown in Figure 3 is that component 2 and exhaust pipe 1 are operatively connected to one another in such a way that a Venturi effect is generated, which helps prevent unwanted exhaust gases from escaping through the open and / or contactless transition 3.2. Thus, although transition 3.2 is open and / or contactless, no unwanted exhaust gases escape to the outside through it.

[0040] Among the Fig. 2 and Fig. 3, it should be mentioned that in the transition area Ü between the exhaust pipe 1 and the chassis-fixed component 2, the diameter of the exhaust pipe 1 is larger than the diameter of the chassis-fixed component 2. In Fig. 2 this is realized by the funnel 4, in Fig. 3 by using an exhaust pipe 1 with a larger diameter than the component 2, which can taper again after, for example, approximately 100 to 250 mm, preferably essentially to the diameter of the chassis-fixed component 2.

[0041] To all in the Fig. 1 to 3, it should be mentioned that a freedom of movement in the longitudinal direction and in the radial direction and thus in all three spatial directions is created between the chassis-fixed component 2 and the exhaust pipe 1 in their transition region Ü, so that the chassis-fixed component 2 can preferably move freely in the transition region Ü relative to the exhaust pipe 1 or vice versa.

[0042] The invention is not limited to the preferred embodiments described above. Rather, numerous variants and modifications are possible, which also utilize the inventive concept and therefore fall within the scope of protection. Furthermore, the invention also claims protection for the subject matter and features of the subclaims, independent of the referenced features and claims. List of reference symbols 1 exhaust pipe 2 Chassis-fixed component 3.1 Flexible element 3.2 Open and / or contactless transition 4 funnels 5 collecting ring F Cab Ü Transition area D1 Detail flexible transition D2 Detail open and / or contactless transition D3 Detail open and / or contactless transition

Claims

[1] Driver's cab (F) for a commercial vehicle, with an exhaust pipe (1) and a chassis-fixed component (2) via which exhaust gas can be guided into the exhaust pipe (1), wherein the exhaust pipe (1) is arranged fixed to the driver's cab, characterized by that the exhaust pipe (1) and the chassis-fixed component (2) are operatively connected to one another via an open and / or contactless transition (3.2) and the chassis-fixed component (2) is spaced apart from the exhaust pipe (1) in the longitudinal direction. [2] Driver’s cab (F) according to claim 1, characterized by that the exhaust pipe (1) and the chassis-fixed component (2) are decoupled from movement. [3] Driver’s cab (F) according to claim 1 or 2, characterized by that the exhaust pipe (1) is not fixed to the chassis and / or is mounted on the driver's cab (F) in a noise / vibration decoupled manner. [4] Driver’s cab (F) according to one of the preceding claims, characterized bythat the exhaust pipe (1) comprises a funnel (4) in the transition area (Ü) between the exhaust pipe (1) and the chassis-fixed component (2). [5] Driver’s cab (F) according to one of the preceding claims, characterized by that the chassis-fixed component (2) and the exhaust pipe (1) are operatively connected to one another in such a way that a Venturi effect is created, which helps to ensure that no exhaust gases escape undesirably via the open and / or contactless transition (3.2). [6] Driver’s cab (F) according to one of the preceding claims, characterized by that the exhaust pipe (1) has a collecting ring (5) for running down condensate. [7] Driver’s cab (F) according to one of the preceding claims, characterized by that in the transition region (Ü) between the exhaust pipe (1) and the chassis-fixed component (2), the diameter of the exhaust pipe (1) is larger than the diameter of the chassis-fixed component (2) and is preferably tapered again downstream of the transition region (Ü). [8] Driver’s cab (F) according to one of the preceding claims, characterized by that the exhaust pipe (1) projects beyond the roof of the driver's cab (F) and / or extends vertically at least in sections behind or to the side of the driver's cab (F). [9] Commercial vehicle, preferably a truck, in particular a tractor unit, with a driver's cab (F) according to one of the preceding claims.

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