Vehicle with cabin support system with passive air compressor

Abstract

The invention relates to a vehicle (1) having a frame (3) and a vehicle cabin (4) which is mounted so as to be movable relative to the frame (3) and which has a cabin support system (2), the cabin support system (2) having at least one air spring (6) which is arranged between the frame (3) and the vehicle cabin (4), the air mass in the air spring (6) being variably adjustable by means of a valve unit (12), the cabin support system (2) has a position sensor device (17) for detecting a relative position between the vehicle cabin (4) and the frame (3), and a control unit (15), the control unit (15) controlling the valve unit (12) of the air spring (6) on the basis of the relative position, the cabin support system (2) having at least one passive air compressor (5), the air compressor delivers an air mass to the air spring (6) on the basis of a relative movement between the frame (3) and the vehicle cabin (4).

Description

Technical Field

[0001] The invention relates to a vehicle having the features of the preamble of claim 1 . Background Art

[0002] Particularly in the field of trucks, mounting systems are known for elastically and vibration-damping mounting of a vehicle cabin relative to a vehicle frame, which serve to increase driving comfort. Usually, the mounting systems are realized by air springs arranged between the vehicle cabin and the vehicle frame. The air springs are connected to an air supply, wherein the air supply is usually realized by an air mass accumulator located in the vehicle, which is usually designed as a pressure accumulator, which is filled with air mass by means of a compressor and provides the air supply to the individual air springs via a control device. For this purpose, the compressor must be fed with electrical energy.

[0003] Publication DE 10 2013 009 204 A1 describes a system for adjusting the height of a cab of a truck relative to a vehicle chassis and a corresponding operating method. The system comprises a spring support for elastically supporting the cab on the vehicle chassis, a distance sensor device, which is configured to detect a relative movement and / or distance between the cab and the vehicle chassis, and a control device for variably controlling the spring support, wherein a signal of the distance sensor device is used to control the spring support. The spring support can be adjusted to a first height position, so that the distance between the cab and the vehicle chassis is controlled by the control device to a first target distance. The spring support can be adjusted to at least one second height position, so that the distance between the cab and the vehicle chassis is controlled by the control device to a second target distance, wherein the control device adjusts the spring support to the first height position or to at least one second height position depending on at least one parameter related to the driving route and / or the vehicle condition. Summary of the invention

[0004] The object of the present invention is to provide a cabin support system of the above-mentioned type, which is characterized by low energy consumption and low manufacturing costs.

[0005] According to the invention, this object is achieved by a vehicle having the features of claim 1. Advantageous embodiments are given by the dependent claims, the drawing and / or the description.

[0006] The subject of the invention is a vehicle having a frame and a vehicle cabin, wherein the vehicle cabin is movable relative to the frame. The vehicle cabin, also known as the driver's cab, is a part of the vehicle structure that forms a space for the driver and possibly one or more accompanying persons. The frame, also known as the chassis or frame, is a part of the vehicle structure that accommodates or carries the drive, the vehicle cabin and possibly the payload.

[0007] The vehicle has a particularly pneumatic cabin support system. In particular, the cabin support system is used to shield vibrations and / or to change the position of the vehicle cabin relative to the vehicle frame.

[0008] The cabin support system has at least one or exactly one air spring arranged between the vehicle frame and the vehicle cabin. The air spring has the function of influencing the suspension characteristics and / or the position of the vehicle cabin relative to the vehicle frame by changing the air volume and / or air mass of the air spring. In principle, the vehicle cabin can be supported on the vehicle frame only by at least one air spring. Alternatively, the vehicle cabin is additionally supported or supported on the vehicle frame by at least one damping element and / or spring element and / or support element. In particular, it is proposed that the cabin support system has at least two or exactly two air springs, wherein at least one of the air springs is arranged on each side of the vehicle. The air spring is essentially formed by a diaphragm folding airbag, which is sealingly connected to a mounting plate on the one hand and to a rolling piston on the other hand.

[0009] The cabin support system has a valve unit which is designed and / or suitable for variably adjusting the air mass in an air spring. In principle, the valve unit is integrated in the air spring. Alternatively, the valve unit can also be designed as a central valve unit which serves to variably adjust the air mass of two or more air springs. Preferably, the air mass can be increased to raise the air spring or the vehicle cabin or reduced to lower the air spring or the vehicle cabin by means of the valve unit in at least one of the air springs. In particular, for this purpose, an air mass is provided to the air spring which is supplied to the air spring or discharged from the air spring via the valve unit.

[0010] The cabin support system has a position sensor device which is designed and / or suitable for detecting a relative position between a vehicle cabin and a vehicle frame. In particular, the position sensor device is used to detect a distance and / or a movement and / or an inclination of the vehicle cabin relative to the vehicle frame, in particular during driving. To this end, the position sensor device may include, for example, a displacement sensor and / or an inclination sensor and / or an acceleration sensor. Preferably, the position sensor device is used to detect an absolute or relative position of the vehicle cabin.

[0011] The cabin support system has a control unit which controls the valve unit of the air spring based on the detected relative position and / or absolute position. In particular, the control unit is designed as an electronic control unit (ECU). The control unit can be designed as a vehicle controller or at least integrated into the vehicle controller. Alternatively, the control unit can also be formed by a separate controller which is connected to the vehicle controller via a bus system (e.g. a CAN bus). In particular, the control unit lowers or raises the vehicle cabin or the air spring and / or increases or decreases the air mass in the air spring depending on the relative position. Particularly preferably, the control unit is connected to the position sensor device and the valve unit in terms of signal technology.

[0012] According to the invention, the cabin support system has at least one or exactly one passive air compressor which, due to the relative movement between the vehicle frame and the vehicle cabin, in particular during driving, supplies air mass in the form of compressed air to at least one air spring. In particular, the vehicle is designed as a vehicle without an electrically driven compressor, wherein the air mass required for the air springs is supplied completely or mostly by the passive air compressor. Preferably, the air compressor is kinematically coupled to the vehicle frame and the vehicle cabin, so that the relative movement between the vehicle cabin and the vehicle frame which occurs during driving can be used as an energy source for supplying air mass to the at least one air spring.

[0013] Thus, a pneumatic cabin support system is proposed which, by using kinetic energy to convey air mass, no longer requires an active energy supply. As a result, the cabin support system can be operated in a particularly energy-efficient and self-sufficient manner. A further advantage is that a passive air compressor can be constructed more simply and cost-effectively than a compressor usually installed on a vehicle.

[0014] In an advantageous embodiment, it is provided that the air compressor is kinematically coupled to the vehicle frame and the vehicle cabin in such a way that the air compressor delivers air mass during a relative yaw or roll movement between the vehicle frame and the vehicle cabin, in particular about the vehicle longitudinal axis (x-axis). Alternatively or optionally in addition, the air compressor is kinematically coupled to the vehicle frame and the vehicle cabin in such a way that the air compressor delivers air mass during a relative pitch movement between the vehicle frame and the vehicle cabin, in particular about the vehicle transverse axis (y-axis). In particular, the air compressor is arranged off-center, in particular off-center from the vehicle longitudinal axis and / or the vehicle transverse axis, between the vehicle cabin and the vehicle frame for this purpose. Optionally, the cabin support system can have at least one further air compressor, wherein one air compressor is designed or arranged to generate compressed air during a relative yaw movement and another air compressor is designed or arranged to generate compressed air during a relative pitch movement. Thus, an air compressor is proposed that can be integrated in a simple manner between the vehicle frame and the vehicle cabin and that generates compressed air using different relative movements.

[0015] In another embodiment variant, it is provided that the air compressor is designed as an air pump, which is connected to the vehicle frame on the one hand and to the vehicle cabin on the other hand. In particular, the relative movement is converted into a working movement of the air pump in order to convey the air mass located in the air pump and to provide it at least indirectly to the air spring. In particular, the air spring is pneumatically connected to the air pump, in particular to at least one working space of the air pump, for this purpose. In principle, the air mass provided by the air pump can be provided to the valve unit directly or, as explained in more detail below, indirectly via an air mass storage device. Thus, an air compressor is proposed, which is characterized by a particularly simple and low-cost structure and can also be integrated in a simple manner between the vehicle frame and the vehicle cabin.

[0016] In another exemplary embodiment, it is provided that the air compressor has a cylinder and a piston guided in the cylinder by a piston rod, which divides the cylinder into a first working space and a second working space. In particular, the air compressor is configured at least as a single-acting piston air pump. Preferably, the piston rod is connected to the piston at one end and is selectively connected to the vehicle frame or the vehicle cabin at the other end via a connecting interface. Accordingly, the cylinder can be selectively connected to the vehicle cabin or the vehicle frame on the side away from the piston rod via another connecting interface. In particular, the first working space should be understood as a working space close to the piston rod, and the second working space should be understood as a working space away from the piston rod.

[0017] According to this variant embodiment, at least one of the working spaces is connected to the environment via an inlet valve, while another working space is at least indirectly connected to the air spring via an outlet valve. In particular, the relative movement between the vehicle cabin and the frame is converted into a stroke movement of the piston, wherein the air mass is conveyed based on this stroke movement, in particular when the piston rod is retracted and / or extended. In principle, at least one inlet valve and outlet valve can be integrated in the cylinder. Alternatively, at least one inlet valve and outlet valve can also be constructed separately from the air pump and / or connected to the flow path before or after the air pump. Therefore, a passive air compressor is proposed, which is characterized by a particularly simple and robust structure.

[0018] In another design scheme, it is provided that the air compressor is constructed as a double-acting piston air pump. In particular, double-acting should be understood here as the air pump conveying air mass during the pulling movement and the pushing movement, or when the piston rod extends and retracts. For this purpose, the air compressor has a first inlet valve and a second inlet valve and a first outlet valve and a second outlet valve. The first working space is connected to the environment through the first inlet valve and is at least indirectly connected to the air spring through the first outlet valve. The second working space is connected to the environment through the second inlet valve and is at least indirectly connected to the air spring through the second outlet valve. During the compression movement, that is, when the piston rod is retracted into the cylinder, the air mass from the environment flows into the first working space through the first inlet valve, wherein the air mass in the second working space is compressed and flows out as air mass through the second outlet valve. During the pulling movement, that is, when the piston rod extends out of the cylinder, the air mass from the environment flows into the second working space through the second inlet valve, wherein the air mass in the first working space is compressed and flows out as air mass through the first outlet valve. Preferably, the first and second inlet valves and / or the first and second outlet valves are designed as spring-loaded check valves, which open or close automatically depending on the stroke movement. Thus, an air pump is proposed, which is characterized in that the air mass is continuously conveyed during the relative movement and can therefore be operated particularly efficiently.

[0019] In one improvement, it is provided that the cabin support system has an air mass storage device, which is configured and / or suitable for temporarily storing the air mass generated by the air compressor. In particular, the air mass storage device has the function of storing the air mass delivered and supplied by the air compressor and providing the air mass to the air spring through the valve unit. In particular, the air mass storage device is arranged between the air pump and the air spring in terms of flow technology for this purpose. Here, the air mass storage device is pneumatically connected to the air compressor through the compressed air pipeline on the input side, and pneumatically connected to the air spring through the compressed air pipeline on the output side. In particular, the air mass storage device is configured as a pressure storage device. The air mass storage device can be configured as a central air mass storage device, for example, wherein one or more air springs can supply air mass through the air mass storage device. In particular, the air mass storage device can be designed so that the air spring can be raised at least once, especially in a pressure-free state. In principle, the air mass storage device can be arranged at any position in the vehicle, for example, at the frame or the vehicle cabin. However, the air mass storage device is preferably arranged between the frame and the vehicle cabin, in particular adjacent to the air compressor and / or the air spring. A cabin support system is therefore proposed which is characterized by a high operational reliability, wherein a supply of compressed air can be ensured for a limited time, in particular when the vehicle is stationary, by means of an air mass storage device.

[0020] In an advantageous embodiment, it is provided that at least one outlet valve, preferably the first outlet valve and / or the second outlet valve of the air compressor is connected to the air mass accumulator via a compressed air line on the input side. In particular, the first outlet valve and the second outlet valve are connected to the air mass accumulator via a common compressed air line. Alternatively, the first outlet valve and the second outlet valve can also be connected to the air mass accumulator via separate compressed air lines. Thus, a particularly easy-to-install cabin support system is proposed.

[0021] In a further advantageous embodiment, it is provided that the air mass reservoir has a filling valve which is designed and / or suitable for filling and / or prefilling the air mass reservoir with air mass from the outside. In particular, the filling valve is used to connect a compressed air source in order to supply the air mass from the outside. For example, the filling valve is designed as a spring-loaded non-return valve which has a compressed air connection for connecting a compressed air source. In particular, when the air mass reservoir is installed in a vehicle, the filling valve can be accessed from the outside so that the air mass reservoir can be refilled with air mass when necessary.

[0022] In another design, it is provided that the valve unit of the air spring has an inlet valve and an outlet valve, wherein the control device is used to manipulate the inlet valve or the outlet valve to raise or lower the air spring. In simple terms, the inlet valve is manipulated to supply air mass to the air spring, thereby lifting, wherein the outlet valve is closed at the same time. Correspondingly, the outlet valve is opened to discharge the air mass, thereby lowering the air spring, wherein the inlet valve is closed at the same time. In principle, the inlet valve and / or the outlet valve are configured as switching valves with discrete switching states, preferably exactly two switching states. Alternatively, the inlet valve and / or the outlet valve can also be configured as a continuous valve with continuous switching states, in particular a throttle valve. Particularly preferably, the inlet valve and the outlet valve can be electrically controlled or electrically adjusted by a control unit. For this purpose, the inlet valve and the outlet valve can be connected to the control unit via a signal line, respectively. Therefore, an air spring is proposed, which is characterized by easy control and low structural cost.

[0023] In another embodiment, it is provided that the inlet valve of the air spring is directly connected to the air mass reservoir via a compressed air line on the output side. In particular, each air spring has a separate inlet valve, wherein all inlet valves are connected jointly to the air mass reservoir via a compressed air line on the output side. In principle, the inlet valve can be formed as a single inlet valve integrated into the respective air spring. Alternatively, the inlet valves can also be combined together in a valve block. In addition, it can also be provided that the outlet valve of the air spring is selectively connected to the air mass reservoir or to the environment. Therefore, a cabin support system is proposed, which is characterized by a simple connection of one or more air springs.

[0024] In a further embodiment, it is provided that the cabin support system has an overpressure valve. In particular, the overpressure valve serves to protect the air mass reservoir and / or the air spring from an inadmissible pressure increase. To this end, the overpressure valve can be opened at a specified response pressure so that the air mass is discharged into the environment through the overpressure valve until a specified closing pressure is reached. The overpressure valve is connected between the air compressor and the air spring, in particular between at least one outlet valve of the air compressor and an inlet valve of the air spring. In particular, the overpressure valve is optionally connected downstream of the at least one outlet valve to the air compressor or to the compressed air line on the input side or to the air mass reservoir. Thus, a cabin support system is proposed, which is characterized by particularly safe operating behavior and simple air pressure monitoring.

[0025] In a further development, it is provided that the control device realizes the height adjustment and / or inclination adjustment of the vehicle cabin by controlling and / or regulating the valve unit based on the relative position. Advantageously, the control device can increase the distance and / or inclination or inclination angle of the vehicle cabin relative to the vehicle frame by supplying air mass into the air spring, or reduce the distance and / or inclination or inclination angle of the vehicle cabin relative to the vehicle frame by discharging air mass from the air spring, so as to change the height and / or inclination of the vehicle cabin relative to the vehicle frame.

[0026] In another alternative embodiment, it can be provided that the cabin support system has at least one or exactly one shock absorber, which is designed and / or suitable for supporting the vehicle cabin on the frame in a vibration-damping manner. The shock absorber can be designed as a hydraulic shock absorber or a pneumatic shock absorber. In particular, the shock absorber is arranged between the frame and the vehicle cabin. Here, the shock absorber is connected to the frame on the one hand and to the vehicle cabin on the other hand. Preferably, the shock absorber is pivotably supported on the vehicle cabin and / or the frame. In particular, at least one shock absorber can be provided for each air spring. In principle, at least one shock absorber can be arranged on each side of the vehicle. In particular, exactly two shock absorbers and / or exactly two air springs can be arranged on each side of the vehicle. Here, two shock absorbers or air springs can be arranged in the front area of ​​the vehicle or the vehicle cabin, and two shock absorbers and / or air springs can be arranged in the rear area of ​​the vehicle or the vehicle cabin.

[0027] In another exemplary embodiment, it is provided that the air compressor is arranged in the front region and the shock absorber is arranged in the rear region when viewed in the direction of travel. Alternatively, however, at least one shock absorber can be arranged in the front region and at least one air compressor can be arranged in the rear region. In particular, at least one air spring is arranged between the air compressor and the shock absorber when viewed in the direction of travel. In particular, one shock absorber, one air spring and one air compressor can be arranged on each side of the vehicle, wherein they are arranged mirror-symmetrically to one another with respect to the longitudinal axis of the vehicle. Thus, a cabin support system is proposed, which is characterized by a vibration-damped support and a simple transmission of relative movements to the air compressor.

[0028] In a further embodiment, it is provided that the vehicle is a commercial vehicle (for example a truck) or an agricultural machine (for example a tractor) or a construction machine (for example a wheel loader). BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, advantages and effects of the invention are given by the following description of preferred embodiments of the invention. Among them:

[0030] Figure 1 A schematic diagram of a vehicle having a cabin support system is shown. DETAILED DESCRIPTION

[0031] Figure 1 In a highly schematic illustration, a vehicle 1 is shown as an embodiment of the invention with a cabin support system 2. The vehicle is, for example, a cargo vehicle, such as a truck.

[0032] The vehicle 1 has a vehicle frame 3 and a vehicle cabin 4, wherein the vehicle cabin 4 is movable relative to the vehicle frame 3. In addition to driving comfort, the cabin support system 2 also ensures the relative position of the vehicle cabin 4 and the vehicle frame 3.

[0033] For this purpose, the cabin support system 2 has at least one regulated air spring 6 and at least one shock absorber 7, which are used to support the vehicle cabin 4 in a vibration-damped manner on the vehicle frame 3. For this purpose, the air spring 6 and the shock absorber 7 are each arranged between the vehicle frame 3 and the vehicle cabin 4 and are connected to the vehicle frame 3 on the one hand and to the vehicle cabin 4 on the other hand.

[0034] The air spring 6 essentially has a diaphragm bellows 8, a mounting plate 9 and a rolling piston 10, which are connected to one another in an airtight manner and define an air chamber 11. The mounting plate 9 is connected to the vehicle cabin 4, and the rolling piston 10 is connected to the vehicle frame 3.

[0035] The cabin support system 2 has a valve unit 12 for variably adjusting the air mass in the air chamber 11 of the air spring 6. For this purpose, the valve unit 12 has an inlet valve 13 for supplying the air mass and an outlet valve 14 for discharging the air mass. For example, the inlet valve 13 and the outlet valve 14 are each designed as a switching valve with two discrete switching states, which is integrated in the rolling piston 10.

[0036] The cabin support system 2 has an electronic control unit 15 for regulating and / or controlling the valve unit 12, which is connected to the inlet valve 13 and the outlet valve 14 in terms of signal technology via signal lines 16. For example, the control unit 15 is designed as a so-called electronic cabin air leveling module (eCALM).

[0037] Furthermore, the cabin support system 2 has a position sensor device 17 for detecting the relative position between the vehicle frame 3 and the vehicle cabin 4. For example, the position sensor device 17 has at least one displacement sensor 18 for detecting the relative position or absolute position of the vehicle cabin 4 relative to the vehicle frame 3. For example, the displacement sensor 18 is designed as a magnetic sensor and / or an inductive sensor and / or a photoelectric sensor. The displacement sensor 18 is connected to the control unit 15 in terms of signal technology via a further signal line 19 in order to transmit the detected relative position or the relative position or absolute position of the vehicle cabin 4 to the control unit 15.

[0038] In this case, the control unit 15 controls the valve unit 12 based on the relative position, for example by means of an algorithm executed on the control unit 15, in order to, for example, level, lower or raise the vehicle cabin 4 to different heights. For example, it can be decided based on the relative position whether an air mass is to be supplied to the air spring 6 or discharged from the air spring 6, wherein the inlet valve 13 or the outlet valve 14 is actuated or regulated for this purpose via a signal line 16.

[0039] For this purpose, the air springs 6 must be supplied with air mass, wherein in vehicles with an existing compressed air system, this compressed air system only needs to be connected to the air springs 6. If no compressed air system is already available, this must be implemented separately, wherein the compressed air system must be actively supplied with energy to produce compressed air. Therefore, a compressed air system for the cabin support system 2 is proposed, which no longer requires an active supply of energy. For this purpose, the cabin support system 2 has a passive air compressor 5, which supplies air mass to the air springs 6 based on the relative movement between the vehicle frame 3 and the vehicle cabin 4.

[0040] According to this embodiment, the air compressor 5 is constructed as a double-acting air piston pump, which essentially has a cylinder 20 and a piston 22 fixed to a piston rod 21, which is guided along the inner wall in the cylinder 20. The air compressor 5 is arranged between the frame 3 and the vehicle cabin 4, wherein, on the one hand, the cylinder 20 is movably coupled to the frame 3 and, on the other hand, the piston rod 21 is movably coupled to the vehicle cabin 4.

[0041] The piston 22 divides the cylinder 20 into a first working space 23 and a second working space 24. The two working spaces 23, 24 are connected to an air mass storage 27 via a compressed air line 25 on the input side, respectively, which stores the air mass generated by the air compressor 5 and supplies it to the air spring 6. For this purpose, the air mass storage 27 is connected to the inlet valve 12 of the air spring 6 via a compressed air line 26 on the output side.

[0042] In addition, the first working space 23 of the air compressor 5 is connected to the environment or atmosphere via a first inlet valve 28 and is connected to the air mass storage device 27 via a first outlet valve 30. The second working space 24 is connected to the environment or atmosphere via a second inlet valve 29 and is connected to the air mass storage device 27 via a second outlet valve 31. Here, the two outlet valves 31 are connected to the air mass storage device 27 via the compressed air line 25 on the input side.

[0043] The cabin support system 2 also has an overpressure valve 32 which ensures that an excessive pressure does not build up in the air mass storage device 27 or that a prescribed operating pressure is not exceeded. In the illustration shown, the overpressure valve 32 is connected to the compressed air line 25 on the input side.

[0044] The mass air reservoir 27 also has a filling valve 33, wherein the mass air reservoir 27 can first be filled via the filling valve 33. The filling valve 33 is suitable, for example, for connecting an external compressed air source, such as a compressor, so that the mass air reservoir 27 can be prefilled or refilled as required.

[0045] The air compressor 5 is arranged between the vehicle frame 3 and the vehicle cabin 4 in such a way that air mass is delivered both during a relative yaw movement between the vehicle frame 3 and the vehicle cabin 4 about the vehicle longitudinal axis (x-axis) and during a relative pitch movement between the vehicle frame 3 and the vehicle cabin 4 about the vehicle transverse axis (y-axis). For this purpose, the air compressor 5 is arranged in the front region of the vehicle cabin 4, offset from the vehicle longitudinal axis (x-axis) and the vehicle transverse axis (y-axis). The shock absorber 7 is arranged in the rear region of the vehicle cabin 4, wherein the air spring 6 is arranged between the air compressor 5 and the shock absorber 7. For example, the air spring 6, the shock absorber 7 and the air compressor 5 can be arranged in a mirror-symmetrical manner (in particular with respect to the x-axis) on each side of the vehicle.

[0046] During driving, this relative movement is converted into a relative stroke movement between the cylinder 20 and the piston rod 21. When the piston rod 21 is retracted into the cylinder 20, the air mass flows into the first working space 23 through the first inlet valve 28, wherein the air mass in the second working space 24 is compressed by the piston 22 and flows out through the second outlet valve 31 as air mass and is stored in the air mass storage 27. When the piston rod 21 is extended out of the cylinder 20, the air mass flows into the second working space 24 through the second inlet valve 29, wherein the air mass in the first working space 23 is compressed by the piston 22 and flows out through the first outlet valve 30 as air mass and is stored in the air mass storage 27. Both the two inlet valves 28, 29 and the two outlet valves 30, 31 are configured as spring-loaded check valves, which automatically release or block the flow path according to the stroke movement.

[0047] Based on this relative position, the control device achieves a height adjustment or inclination adjustment of the vehicle cabin 4 relative to the vehicle frame 3 by corresponding control or regulation of the valve unit 12. For example, the inlet valve 13 is opened for this purpose, while the outlet valve 14 is closed, so that the air mass from the air mass storage 27 can flow into the air chamber 11, thereby raising the air spring 6 and / or increasing the damping force. For example, the outlet valve 14 is opened, while the inlet valve 13 is closed, so that the air mass can flow out of the air chamber 11 into the environment, thereby lowering the air spring 6.

[0048] List of reference numerals:

[0049] 1 Vehicle

[0050] 2 Cockpit support system

[0051] 3 Frame

[0052] 4 Vehicle cockpit

[0053] 5. Air compressor

[0054] 6 Air springs

[0055] 7 Shock absorber

[0056] 8 Diaphragm folding airbag

[0057] 9 Mounting plate

[0058] 10 Rolling Piston

[0059] 11 Air Chamber

[0060] 12 Valve unit

[0061] 13 Inlet valve

[0062] 14 Outlet valve

[0063] 15 Control Unit

[0064] 16 Signal lines

[0065] 17 Position sensor

[0066] 18 Displacement Sensor

[0067] 19 Another signal line

[0068] 20 Cylinders

[0069] 21 Piston rod

[0070] 22 Piston

[0071] 23 First Workspace

[0072] 24 Second workspace

[0073] 25 Compressed air line on the input side

[0074] 26 Compressed air line on the output side

[0075] 27 Air quality storage

[0076] 28 First inlet valve

[0077] 29 Second inlet valve

[0078] 30 First outlet valve

[0079] 31 Second outlet valve

[0080] 32 Overpressure valve

[0081] 33 Filling valve

Claims

1. Vehicle (1), The vehicle comprises a frame (3) and a vehicle cabin (4) supported movably relative to the frame (3); The vehicle also has a cabin support system (2), in, The cabin support system (2) has at least one air spring (6) arranged between the vehicle frame (3) and the vehicle cabin (4), wherein the air mass in the air spring (6) can be variably adjusted by means of a valve unit (12). The cabin support system (2) comprises a position sensor device (17) for detecting the relative position between the vehicle cabin (4) and the vehicle frame (3) and a control unit (15), wherein the control unit (15) controls the valve unit (12) of the air spring (6) based on the relative position. It is characterized in that The cabin support system (2) has at least one passive air compressor (5) which supplies air mass to the air spring (6) based on the relative movement between the vehicle frame (3) and the vehicle cabin (4).

2. The vehicle (1) according to claim 1, characterized in that The air compressor (5) is movably coupled to the vehicle frame (3) and the vehicle cabin (4) so ​​that the air compressor (5) delivers air mass when relative yaw and / or pitch motion occurs between the vehicle frame (3) and the vehicle cabin (4).

3. The vehicle (1) according to claim 1 or 2, characterized in that The air compressor (5) is configured as an air pump.

4. The vehicle (1) according to any one of the preceding claims, characterized in that The air compressor (5) comprises a cylinder (20) and a piston (22) guided in the cylinder (20) by a piston rod (21), the piston dividing the cylinder (20) into a first working space (23) and a second working space (24), wherein at least one working space (23, 24) is connected to the environment via an inlet valve (28, 29), and the other working space (23, 24) is at least indirectly connected to the air spring (6) via an outlet valve (30, 31).

5. The vehicle (1) according to claim 4, characterized in that The air compressor (5) is constructed as a double-acting air pump, wherein the first working space (23) is connected to the environment via a first inlet valve (28) and is at least indirectly connected to the air spring (6) via a first outlet valve (30), and wherein the second working space (24) is connected to the environment via a second inlet valve (29) and is at least indirectly connected to the air spring (6) via a second outlet valve (31).

6. The vehicle (1) according to any one of the preceding claims, characterized in that The cabin support system (2) has an air mass storage device (27) for temporarily storing the air mass delivered by the air compressor (5), wherein the air mass storage device (27) is pneumatically connected to the air compressor (5) via a compressed air line (25) on the input side and is pneumatically connected to the air spring (6) via a compressed air line (26) on the output side.

7. The vehicle (1) according to claim 6, characterized in that The first outlet valve (30) and / or the second outlet valve (31) of the air compressor (5) are connected to the air mass storage device (27) via the compressed air line (25) on the input side.

8. The vehicle (1) according to claim 6 or 7, characterized in that The air mass accumulator (27) has a filling valve (33) for filling and / or prefilling the air mass accumulator (27) with air mass from the outside.

9. The vehicle (1) according to any one of the preceding claims, characterized in that The valve unit (12) of the air spring has an inlet valve (13) and an outlet valve (14), wherein the control device (15) actuates the inlet valve (13) or the outlet valve (14) to raise or lower the air spring (6).

10. The vehicle (1) according to claim 9, characterized in that The inlet valve (13) of the air spring (6) is directly connected to the air mass accumulator (27) via the compressed air line (26) on the output side.

11. The vehicle (1) according to any one of the preceding claims, characterized in that The cabin support system (2) has an overpressure valve (32), wherein the overpressure valve (32) is connected between the air compressor (5) and the air spring (6).

12. The vehicle (1) according to any one of the preceding claims, characterized in that The control device (15) performs height adjustment and / or inclination adjustment on the vehicle cabin (4) by controlling and / or regulating the valve unit (12) of the air spring (6).

13. The vehicle (1) according to any one of the preceding claims, characterized in that The cabin support system (2) has at least one vibration damper (7) for supporting the vehicle cabin (4) on the vehicle frame (3) in a vibration-damping manner, wherein the vibration damper is connected to the vehicle frame (3) on the one hand and to the vehicle cabin (4) on the other hand.

14. The vehicle (1) according to claim 11, characterized in that The air compressor (5) is arranged in the front region, and the shock absorber (7) is arranged in the rear region, viewed in the direction of travel.

15. The vehicle (1) according to any one of the preceding claims, characterized in that The vehicle (1) is a truck, a construction machine or an agricultural machine.

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