SE542612C2

SE542612C2 - Vehicle, Pump, and Inlet System

Info

Publication number: SE542612C2
Application number: SE1850191A
Authority: SE
Inventors: Anton Gullbrandson
Original assignee: Scania Cv Ab
Priority date: 2018-02-21
Filing date: 2018-02-21
Publication date: 2020-06-16
Also published as: BR102019002409A2; SE1850191A1; DE102019000750A1; DE102019000750B4

Abstract

A vehicle (1) is disclosed comprising a first vehicle structure (3), a second vehicle structure (5) resiliently suspended to the first vehicle structure (3), and a pump (7) comprising an inlet (9), an outlet (11), and a pumping chamber (13). The pump (7) comprises a first portion (15) operably connected to the first vehicle structure (3) and a second portion (17) operably connected to the second vehicle structure (5). The pump (7) is configured to pump fluid from the inlet (9) to the outlet (11) through the pumping chamber (13) upon a relative movement between the first and second vehicle structures (3, 5). The present disclosure further relates to a pump (7) configured to pump a fluid and an inlet system (27) for a vehicle (1).

Description

Vehicle, Pump, and lnlet System TECHNICAL FIELDThe present disclosure relates to a vehicle comprising a pump. The present disclosurefurther relates to a pump configured to pump a fluid and an inlet system for a vehicle.

BACKGROUND l\/lodern vehicles usually comprise numerous components and subsystems. Many of thesecomponents and subsystems require powering and/or conducting of fluid thereto and/ortherefrom. The powering may be obtained using electrical cables, hydraulic or pneumaticconduits, or mechanical connections, for example a mechanical connection to a shaft of apowertrain of the vehicle, or the like. Fluids may be conducted to and from components andsubsystems using conduits and pipes.

The routing of conduits, pipes, electrical cables, and mechanical connections betweencomponents and subsystems of a vehicle poses a problem. This because it adds complexityto the vehicle and because there usually is a limited access to space in the vehicle. Further,when routing conduits, pipes, electrical cables, and mechanical connections, one shouldpreferably ensure that a person can reach other components in the vehicle example during aservice or repair procedure of the components of the vehicle. ln addition, conduits, pipes,electrical cables, and mechanical connections may incur reliability problems. This because ifsuch a component brakes, it will most likely result in a malfunction of one or more components and/or subsystems.

Pumps are frequently used in vehicles for various purposes. One example of such a purposeis to empty a particle collecting space of a pre-cleaner. Pre-cleaners are used in air intakearrangements for combustion engines. ln such applications, the pre-cleaner is usuallyarranged to separate particles from incoming air before the air is led to a conventional airfilter comprising a filter element. Such a filter element comprises a filter media through whichthe air is conducted. The filter media comprises a semi-permeable material through which aircan pass and in which particles over a certain size are trapped. The filter media causes aflow resistance which causes a pressure drop over the filter element. The flow resistance andthe pressure drop over the filter element increases when particles are trapped in the filtermedia. Thereby, after a certain operational time, the filter element must be replaced.

By using a pre-cleaner arranged to separate particles from incoming air before the air is ledto the filter element, the particle accumulation in the filter element can be reduced, the 2 operational time of the filter element can be increased, the demands on the filter element canbe reduced, a low-price filter element can be used, and/or a filter element having a lowerpressure drop can be used.

A cyclone separator is a type of pre-cleaner used in air intake arrangements for combustionengines. A cyclone separator is a device capable of separating particulates from a flow offluid, i.e. a flow of air, gas and/or liquid, without the use of filter elements, through cycloneseparation. Rotational effects and gravity are used to separate particles from surroundingfluid.

A problem associated with pre-cleaners is evacuation of separated particles from the pre-cleaner. The separated particles may comprise solid particles as well as particles in the formof droplets of liquid, such as water, which contributes to the problem of evacuating theseparated particles. Separated particles can be evacuated from a pre-cleaner into a closedcontainer through a check valve. Further, some pre-cleaners use an electrically driven pumpto pump the separated particles from the pre-cleaner. Further, some pre-cleaners use anejector arranged in an exhaust pipe of the vehicle to suck particles out of the pre-cleaner. Allthese solutions are associated with problems. For example, a closed container needs to beemptied periodically, check valves can easily get clogged, and complicated wiring of cablesand/or ducts may be required when using an electric pump or an ejector in an exhaust pipe. ln addition, in general, today's market requires high quality products capable of operating inan efficient manner, while the products have conditions and/or characteristics suitable for being manufactured and assembled in a cost-efficient manner.

SUMMARYlt is an object of the present invention to overcome, or at least alleviate, at least some of theabove-mentioned problems and drawbacks.

According to a first aspect of the invention, the object is achieved by a vehicle comprising afirst vehicle structure, a second vehicle structure resiliently suspended to the first vehiclestructure, and a pump comprising an inlet, an outlet, and a pumping chamber. The pumpcomprises a first portion operably connected to the first vehicle structure and a secondportion operably connected to the second vehicle structure. The pump is configured to pumpfluid from the inlet to the outlet through the pumping chamber upon a relative movementbetween the first and second vehicle structures. 3 Thereby, a useful pumping work is obtained upon a relative movement between the first andsecond vehicle structures. The relative movement between the first and second vehiclestructures may for example be obtained during operation of the vehicle, such as duringdriving of the vehicle.

As a further result, the useful pumping work is obtained in an energy-efficient manner sincethe pump utilizes the relative movement between the first and second vehicle structures toobtain the useful pumping work. Further, the need for other means of driving the pump iscircumvented, such as electrical wiring, hydraulic or pneumatic conduits, a mechanicalconnection to a shaft of a power source of the vehicle, or the like. As a further result thereof,a reliable driving of the pump is provided. Furthermore, conditions are provided for anefficient utilization of space, because the need for electrical wiring, hydraulic or pneumaticconduits, or mechanical connections are circumvented for driving the pump. As a still furtherresult thereof, the pump of the vehicle has conditions and characteristics suitable for being manufactured and assembled in a cost-efficient manner.

Accordingly, a vehicle is provided overcoming, or at least alleviating, at least some of theabove-mentioned problems and drawbacks. As a result, the above-mentioned object isachieved.

Optionally, the vehicle comprises a suspension arrangement, and wherein the secondvehicle structure is resiliently suspended to the first vehicle structure, via the suspensionarrangement. Thereby, a reliable and predictable relative movement between the first andsecond vehicle structures can be provided, for example during operation of the vehicle. As afurther result thereof, the useful pumping work can be obtained in a reliable and predictable manner.

Optionally, the suspension arrangement is configured to allow relative movement betweenthe first and second vehicle structures to provide a shock absorbing function between thefirst vehicle structure and the second vehicle structure during operation of the vehicle.Thereby, the useful pumping work can be obtained from a relative movement between thefirst and second vehicle structures caused by shocks between the first vehicle structure andthe second vehicle structure during operation of the vehicle.

Optionally, the first vehicle structure is a supporting structure supporting further componentsof the vehicle. Thereby, the useful pumping work is obtained from a relative movementbetween the second vehicle structure and the first vehicle structure being a supporting 4 structure supporting further components of the vehicle. Accordingly, the useful pumping workis obtained from a relative movement between vehicle structures used for further purposes than obtaining the useful pumping work.

Optionally, the first vehicle structure is a chassis of the vehicle. Thereby, the useful pumpingwork is obtained from a relative movement between the second vehicle structure and thechassis of the vehicle. Accordingly, the useful pumping work is obtained from a relativemovement between vehicle structures used for further purposes than obtaining the useful pumping work.

Optionally, the second vehicle structure is a supporting structure supporting furthercomponents of the vehicle. Thereby, the useful pumping work is obtained from a relativemovement between the first vehicle structure and the second vehicle structure being asupporting structure supporting further components of the vehicle. Accordingly, the usefulpumping work is obtained from a relative movement between vehicle structures used for further purposes than obtaining the useful pumping work.

Optionally, the second vehicle structure is a cab of the vehicle. Thereby, the useful pumpingwork is obtained from a relative movement between the first vehicle structure and the cab ofthe vehicle. Accordingly, the useful pumping work is obtained from a relative movementbetween vehicle structures used for further purposes than obtaining the useful pumping work.

Optionally, the pumping chamber is arranged between the first and second portions.Thereby, an efficient and reliable pumping of fluid is obtained upon a relative movementbetween the first and second vehicle structures.

Optionally, the vehicle comprises an inlet system configured to conduct air to an engine ofthe vehicle, wherein the inlet system comprises a first conduit section attached to the firstvehicle structure, a second conduit section attached to the second vehicle structure, and afirst bellow fluidly connecting the first and second conduit sections, and wherein the firstportion of the pump is operably connected to the first conduit section and the second portionof the pump is operably connected to the second conduit section. Thereby, the first andsecond portions of the pumps are operably connected to a respective vehicle structure in anefficient and reliable manner. As a further result thereof, the useful pumping work is obtained in an efficient and reliable manner.

Optionally, the pumping chamber is arranged adjacent to the first bellow. Thereby, a spaceefficient and reliable pump is provided.

Optionally, the pump comprises a second bellow, and wherein walls of the second bellowde|imits the pumping chamber. Thereby, a simple, efficient and reliable pump is provided.Further, a pump is provided capable of pumping fluid in an efficient manner also upondifferent stroke lengths between the first and second portions, i.e. at different magnitudes ofrelative movement between the first and second vehicle structures.

Optionally, the first and second bellows are provided in a single piece of material. Thereby,the pump of the vehicle and the inlet system of the vehicle have conditions andcharacteristics suitable for being manufactured and assembled in a cost-efficient manner.

Optionally, the pump comprises at least a first valve configured to prevent flow of fluid fromthe outlet to the inlet of the pump. Thereby, an efficient and reliable pumping of fluid isobtained from the inlet to the outlet through the pumping chamber of the pump upon arelative movement between the first and second vehicle structures.

Optionally, the fluid is a gaseous fluid. Thereby, a pump is provided capable of pumping agaseous fluid in an energy efficient manner which circumvents the need for electrical cables,a mechanical connection to a powertrain of the vehicle, and/or hydraulic or pneumaticconduits for driving the pump.

Optionally, the vehicle comprises a pre-cleaner configured to separate particles from an airflow in an inlet system of an engine of the vehicle, wherein the pre-cleaner comprises aparticle collecting space, and wherein the inlet of the pump is fluidly connected to the particlecollecting space. As a result, particles are evacuated from the particle collecting space in asimple, efficient and reliable manner. Further, particles are evacuated from the particlecollecting space in a manner circumventing the need for electrical wiring, hydraulic orpneumatic conduits, a mechanical connection to a shaft of a power source of the vehicle, orthe like, for driving the pump. Further, the need for an ejector arranged in an exhaust pipe ofthe vehicle for sucking particles out of the pre-cleaner is circumvented.

Optionally, the pre-cleaner comprises one or more cyclone separators. Thereby, an efficientseparation of particles from the air flow in the inlet system of the vehicle is provided. 6 According to a second aspect of the invention, the object is achieved by a pump configuredto pump a fluid. The pump is configured to be mounted onto a vehicle comprising a firstvehicle structure and a second vehicle structure resilientiy suspended to the first vehiclestructure. The pump comprises an inlet, an outlet, a pumping chamber, and a first and asecond portion. The first portion is configured to be operably connected to the first vehiclestructure and the second portion is configured to be operably connected to the secondvehicle structure such that the pump pumps fluid from the inlet to the outlet through the pumping chamber upon a relative movement between the first and second vehicle structures.

Thereby, a useful pumping work is obtained upon a relative movement betvveen the first andsecond vehicle structures. The relative movement between the first and second vehiclestructures may for example be obtained during operation of the vehicle, such as duringdriving of the vehicle.

As a further result, the useful pumping work is obtained in an energy-efficient manner sincethe pump utilizes the relative movement between the first and second vehicle structures toobtain the useful pumping work. Further, the need for other means of driving the pump iscircumvented, such as electrical wiring, hydraulic or pneumatic conduits, a mechanicalconnection to a shaft of a power source of the vehicle, or the like. As a further result thereof,a reliable driving of the pump is provided. Furthermore, conditions are provided for anefficient utilization of space in a vehicle comprising the pump, because the need for electricalwiring, hydraulic or pneumatic conduits, or mechanical connections are circumvented fordriving the pump. As a still further result thereof, the pump has conditions and characteristics suitable for being manufactured and mounted onto a vehicle in a cost-efficient manner.

Accordingly, a pump is provided overcoming, or at least alleviating, at least some of theabove-mentioned problems and drawbacks. As a result, the above-mentioned object isachieved.

Optionally, the pump comprises a second bellow, and wherein walls of the second bellowdelimits the pumping chamber. Thereby, a simple, efficient and reliable pump is provided.Further, a pump is provided capable of pumping fluid in an efficient manner also upon 7 different stroke lengths between the first and second portions, i.e. at different magnitudes ofrelative movement between the first and second vehicle structures.

Optionaily, the pump comprises at least a first valve configured to prevent flow of fluid fromthe outlet to the inlet of the pump. Thereby, an efficient and reliable pumping of fluid isobtained from the inlet to the outlet through the pumping chamber of the pump upon arelative movement between the first and second vehicle structures.

Optionaily, the fluid is a gaseous fluid. Thereby, a pump is provided capable of pumping agaseous fluid in an energy efficient manner which circumvents the need for electrical cables,a mechanical connection to a powertrain of the vehicle, and/or hydraulic or pneumaticconduits for driving the pump.

According to a third aspect of the invention, the object is achieved by an inlet system for avehicle. The inlet system comprises a first conduit section configured to be attached to a firstvehicle structure of the vehicle, a second conduit section configured to be attached to asecond vehicle structure of the vehicle, wherein the second vehicle structure is resilientlysuspended to the first vehicle structure. The inlet system further comprises a pumpcomprising an inlet, an outlet, and a pumping chamber. The pump further comprises a firstportion operably connected to the first conduit section and a second portion operablyconnected to the second conduit section such that the pump pumps fluid from the inlet to theoutlet through the pumping chamber upon a relative movement between the first and secondconduit sections.

Thereby, a useful pumping work is obtained upon a relative movement between the first andsecond vehicle structures. The relative movement between the first and second vehiclestructures may for example be obtained during operation of the vehicle, such as duringdriving of the vehicle.

As a further result, the useful pumping work is obtained in an energy-efficient manner sincethe pump utilizes the relative movement between the first and second vehicle structures toobtain the useful pumping work. Further, the need for other means of driving the pump iscircumvented, such as electrical wiring, hydraulic or pneumatic conduits, a mechanicalconnection to a shaft of a power source of the vehicle, or the like. As a further result thereof,a reliable driving of the pump is provided. Furthermore, conditions are provided for anefficient utilization of space in a vehicle comprising the inlet system, because the need for electrical wiring, hydraulic or pneumatic conduits, or mechanical connections are 8 circumvented for driving the pump. As a still further result thereof, the inlet system hasconditions and Characteristics suitable for being manufactured and assembled in a cost- efficient manner.

Accordingly, an inlet system is provided overcoming, or at least alleviating, at least some ofthe above-mentioned problems and drawbacks. As a result, the above-mentioned object isachieved.

Optionally, the inlet system further comprises a first bellow f|uidly connecting the first andsecond conduit sections, wherein the pumping chamber is arranged adjacent to the firstbellow. Thereby, a space efficient and reliable pump is provided.

Optionally, the pump comprises a second bellow, and wherein walls of the second bellowdelimits the pumping chamber. Thereby, a simple, efficient and reliable pump is provided.Further, a pump is provided capable of pumping fluid in an efficient manner also upondifferent stroke lengths between the first and second portions, i.e. at different magnitudes of relative movement between the first and second vehicle structures.

Optionally, the first and second bellows are provided in a single piece of material. Thereby,an inlet system is provided having conditions and characteristics suitable for being manufactured and assembled in a cost-efficient manner.

Optionally, the pump comprises at least a first valve configured to prevent flow of fluid fromthe outlet to the inlet of the pump. Thereby, an efficient and reliable pumping of fluid isobtained from the inlet to the outlet through the pumping chamber of the pump upon a relative movement between the first and second vehicle structures.

Optionally, the inlet system comprises a pre-cleaner configured to separate particles from anair flow in the inlet system, wherein the pre-cleaner comprises a particle collecting space,and wherein the inlet of the pump is f|uidly connected to the particle collecting space. As aresult, particles are evacuated from the particle collecting space in a simple, efficient andreliable manner. Further, particles are evacuated from the particle collecting space in a manner circumventing the need for electrical wiring, hydraulic or pneumatic conduits, a 9 mechanical connection to a shaft of a power source of the vehicle, or the like, for driving thepump. Further, the need for an ejector arranged in an exhaust pipe of the vehicle for suckingparticles out of the pre-cleaner is circumvented.

Optionally, the pre-cleaner comprises one or more cyclone separators. Thereby, an efficientseparation of particles from the air flow in the inlet system is provided.

Further features of, and advantages with, the present invention will become apparent whenstudying the appended claims and the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS Various aspects of the invention, including its particular features and advantages, will bereadily understood from the example embodiments discussed in the following detaileddescription and the accompanying drawings, in which: Fig. 1 illustrates a vehicle, according to some embodiments, andFig. 2 illustrates an enlarged view of an inlet system of the vehicle illustrated in Fig. 1.

DETAILED DESCRIPTION Aspects of the present invention will now be described more fully. Like numbers refer to likeelements throughout. Well-known functions or constructions will not necessarily be describedin detail for brevity and/or clarity.

Fig. 1 illustrates a vehicle 1, according to some embodiments. According to the illustratedembodiments, the vehicle 1 is a truck. According to further embodiments, the vehicle 1 maybe another type of manned or unmanned vehicle for land or water based propulsion such asa lorry, a bus, a construction vehicle, a tractor, a car, a ship, a boat, or the like.

The vehicle 1 comprises a first vehicle structure 3 and a second vehicle structure 5. Thesecond vehicle structure 5 is resiliently suspended to the first vehicle structure 3. Accordingto the illustrated embodiments, the first vehicle structure 3 is a chassis of the vehicle 1. Thefirst vehicle structure 3 is thus a supporting structure supporting further components 21, 23,29 of the vehicle 1, such as an engine 21, a side skirt 23, and a first conduit section 29 of aninlet system 27 of the vehicle 1. Further, according to the illustrated embodiments, thesecond vehicle structure 5 is a cab of the vehicle 1. The second vehicle structure 5 is thus asupporting structure supporting further components 25, 31 of the vehicle 1, such as a door25, and a second conduit section 31 of the inlet system 27 of the vehicle 1. According to further embodiments, the first and/or second vehicle structures 3, 5 may be another type ofsupporting structure of the vehicle 1, such as a wheel axis of the vehicle 1, or the like.

According to the illustrated embodiments, the vehicle 1 comprises a suspension arrangement19. The second vehicle structure 5 is resiliently suspended to the first vehicle structure 3, viathe suspension arrangement 19. The suspension arrangement 19 may comprise one or moresprings, one or more elastic elements, such as rubber elements, and/or one or more shockabsorbers. The suspension arrangement 19 is configured to allow relative movementbetween the first and second vehicle structures 3, 5 to provide a shock absorbing functionbetween the first vehicle structure 3 and the second vehicle structure 5, during operation ofthe vehicle 1. ln this manner, for example during travelling of the vehicle 1 on a road, shockscaused by bumps on the road will at least partially be absorbed by the suspensionarrangement 19, thus limiting transfer of shocks from the first vehicle structure 3 to the second vehicle structure 5.

The vehicle 1 further comprises a pump 7. The pump comprises an inlet 9, an outlet 11, anda pumping chamber 13. The pump 7 comprises a first portion operably connected to the firstvehicle structure 3 and a second portion operably connected to the second vehicle structure5. The pump 7 is configured to pump fluid from the inlet 9 to the outlet 11 through thepumping chamber 13 upon a relative movement between the first and second vehiclestructures 3, 5. Thus, since the first portion of the pump 7 is operably connected to the firstvehicle structure 3 and the second portion of the pump 7 operably connected to the secondvehicle structure 5, a relative movement between the first and second portions of the pump 7is obtained upon the relative movement between the first and second vehicle structures 3, 5.As a result thereof, the pump 7 will pump fluid from the inlet 9 to the outlet 11 through thepumping chamber 13 upon a relative movement between the first and second vehiclestructures 3, 5.

As indicated, the vehicle 1 comprises an inlet system 27. The inlet system 27 is configured toconduct air to the engine 21 of the vehicle 1. The inlet system 27 comprises a first conduitsection 29 attached to the first vehicle structure 3, and a second conduit section 31 attachedto the second vehicle structure 5.

Fig. 2 illustrates an enlarged view of the inlet system 27 of the vehicle 1 illustrated in Fig. 1.As mentioned, the inlet system 27 comprises the first conduit section 29 which is attached tothe first vehicle structure 3 of the vehicle 1 illustrated in Fig. 1. Further, the inlet system 27comprises the second conduit section 31 which is attached to the second vehicle structure 5 11 of the vehicle 1 illustrated in Fig. 1. The inlet system 27 further comprises a first bellow 33fluidly connecting the first and second conduit sections 29, 31. The first bellow 33 is arrangedto provide a leak proof fluid connection between the first and second conduit sections 29, 31,despite the fact that the first and second conduit sections 29, 31 may move relative eachother. The second conduit section 31 comprises an inflow portion 32 and a pre-cleaner 39configured to separate particles from an air flow in an inlet system 27. According to theillustrated embodiments, the pre-cleaner 39 comprises two cyclone separators 42. The pre-cleaner 39 comprises a particle collecting space 41 where particles separated from the airflow in the inlet system 27 are collected. The first conduit section 29 comprises an air filterunit 34 comprising a filter element. The filter element comprises a semi-permeable materialthrough which air can pass and in which particles over a certain size are trapped. The firstconduit section 29 comprises an outflow portion 36 to which an inlet of the engine of thevehicle is connected.

Thus, during operation of the vehicle comprising the inlet system 27, air is flowing into inflowportion 32, through the second conduit section 31, through the pre-cleaner 39, through thefirst bellow 33, into the first conduit section 29 and through the air filter unit 34 towards theinlet of the engine of the vehicle.

According to the illustrated embodiments, the first portion 15 of the pump 7 is operablyconnected to the first conduit section 29 and the second portion 17 of the pump 7 is operablyconnected to the second conduit section 31. Below, simultaneous reference is made to Fig. 1and Fig. 2. As mentioned, the first conduit section 29 is attached to the first vehicle structure3 of the vehicle 1, and the second conduit section 31 is attached to the second vehiclestructure 5 of the vehicle 1. Thus, according to the illustrated embodiments, the first portion15 of the pump is operably connected to the first vehicle structure 3 and a second portion 17operably connected to the second vehicle structure 5. The pump 7 is configured to pumpfluid from the inlet 9 to the outlet 11 through the pumping chamber 13 upon a relativemovement between the first and second vehicle structures 3, 5.

According to the illustrated embodiments, the pumping chamber 13 is arranged between thefirst and second portions 15, 17. Further, the pump 7 comprises a second bellow 35, andwherein walls 37 of the second bellow 35 delimits the pumping chamber 13. The pumpingchamber 13 is arranged adjacent to the first bellow 33. The second bellow 35 is arrangedsuch that the second bellow 35 is compressed when the first bellow 33 is compressed, andsuch that the second bellow 35 is expanded when the first bellow 33 is expanded. An innervolume of the pumping chamber 13 thus increases when the second bellow 35 is expanded 12 and decreases when the second bellow 35 is compressed. Further, according to theillustrated embodiments, the first and second bellows 33, 35 are provided in a single piece ofmaterial. As a result, the first and second bellows 33, 35 can be manufactured and assembled in a cost-efficient manner.

The pump 7 comprises a first valve 38 configured to prevent flow of fluid from the outlet 11 tothe inlet 9 of the pump 7. According to the illustrated embodiments, the inlet 9 of the pump 7is fluidly connected to the particle coliecting space 41. Thereby, particles in the particlecollecting space 41 will be pumped out of the particle collecting space 41 upon a relativemovement between first and second vehicle structures 3, 5. Accordingly, the particles in theparticle collecting space 41 will, together with air, i.e. a gaseous fluid, be pumped from theparticle collecting space 41 into the inlet 9 of the pump, through the pumping chamber 13 ofthe pump 7, and out to the surroundings via the outlet 11 of the pump 7.

As understood from the illustrated embodiments, an inner volume of the pumping chamber13 increases upon a relative movement of the first and second vehicle structures 3, 5 in adirection from each other. Further, the inner volume of the pumping chamber 13 decreasesupon a relative movement of the first and second vehicle structures 3, 5 in a direction towardeach other. When the inner volume of the pumping chamber 13 increases, the first valve 38at the outlet 15 of the pump 7 prevents air from flowing into the pumping chamber 13 via theoutlet 15. lnstead, air is flowing into the pumping chamber 13 via the inlet 9 of the pump 7.According to the illustrated embodiments, the inlet system 27 comprises a second valve 38'between the particle coliecting space 41 and the inlet 9 of the pump. The second valve 38'prevents air from flowing from the inlet 9 of the pump 7 to the particle coliecting space 41.According to further embodiments, the pump 7 may comprise a second valve 38' preventingfluid from flowing out of the pumping chamber 13 via the inlet 9 of the pump 7. Thus, whenthe inner volume of the pumping chamber 13 decreases, the second valve 38' at the inlet 9of the pump 7 prevents air from flowing out of the pumping chamber 13 via the inlet 9.lnstead, air and particles are flowing out of the pumping chamber 13 via the outlet 11 of thepump 7. lt is to be understood that the foregoing is illustrative of various example embodiments andthat the invention is defined only by the appended claims. A person skilled in the art willrealize that the example embodiments may be modified, and that different features of theexample embodiments may be combined to create embodiments other than those describedherein, without departing from the scope of the present invention, as defined by theappended claims.

Claims

1.

2.

3.

4. A vehicle (1) comprising: - a first vehicle structure (3), - a second vehicle structure (5) resiliently suspended to the first vehicle structure (3), and - a pump (7) comprising an inlet (9), an outlet (11), and a pumping chamber (13),characterized in that the first vehicie structure (3) is a chassiet of the tfehicie (t l and 'citesecond vehicle structure (5) is a cab of the vehäcie fi) and the pump (7) comprises a firstportion (15) operably connected to the first vehicle structure (3) and a second portion(17) operably connected to the second vehicle structure (5), and wherein the pump (7) isconfigured to pump fluid from the inlet (9) to the outlet (11) through the pumpingchamber (13) upon a relative movement between the first and second vehicle structures(3, 5). The vehicle (1) according to claim 1, wherein the vehicle (1) comprises a suspensionarrangement (19), and wherein the second vehicle structure (5) is resiliently suspendedto the first vehicle structure (3), via the suspension arrangement (19). The vehicle (1) according to claim 2, wherein the suspension arrangement (19) isconfigured to allow relative movement between the first and second vehicle structures(3, 5) to provide a shock absorbing function between the first vehicle structure (3) andthe second vehicle structure (5) during operation of the vehicle (1 ). The vehicle (1) according to any one of the preceding claims, wherein the first vehiclestructure (3) is a supporting structure supporting further components (21, 23, 29) of thevehicle (1). “7 1Eåëçšlïrlë«!111'a*š;'1'{.~:l"ê':1'¥'.'~. 1 The vehicle (1) according to any one of the preceding claims, wherein thesecond vehicle structure (5) is a supporting structure supporting further components (25,31) of the vehicle (1). lite--vehieåe-f1)--ae-e-er-ding--to-eiaiht-å,"tvlfieifeia-the-seeehd--velaieie--st:meet-tire-(êﬁa--šæ--a-eab-eithe--xf-ehšele-(fi-ïgt- 2 The vehicle (1) according to any one of the preceding claims, wherein thepumping chamber (13) is arranged between the first and second portions (15, 17). šsfï, _____________________ __The vehicle (1) according to any one of the preceding claims, wherein the ..... ._ vehicle (1) comprises an inlet system (27) configured to conduct air to an engine (21) ofthe vehicle (1), wherein the inlet system (27) comprises a first conduit section (29)attached to the first vehicle structure (3), a second conduit section (31) attached to thesecond vehicle structure (5), and a first bellow (33) fluidly connecting the first andsecond conduit sections (29, 31), and wherein the first portion (15) of the pump (7) isoperably connected to the first conduit section (29) and the second portion (17) of thepump (7) is operably connected to the second conduit section (31). “i vehicle (1) according to claim 9-2, wherein the pumping chamber (13) is arranged adjacent to the first bellow (33). The vehicle (1) according to any one of the preceding claims, wherein the pump (7) comprises a second bellow (35), and wherein walls (37) of the second bellow (35)delimits the pumping chamber (13). The vehicle (1) according to any one of the preceding claims, wherein the pump (7) comprises at least a first valve (38) configured to prevent flow of fluid from the outlet(11) to the inlet (9) of the pump (7). i* ~_jš__§â__._ _______________ _The vehicle (1) according to any one of the preceding claims, wherein the fluid \*:¥: is a gaseous fluid. ,,,,,,,,,,,,,,,,,,, “The vehicle (1) according to any one of the preceding claims, wherein thevehicle (1) comprises a pre-cleaner (39) configured to separate particles from an air flowin an inlet system (27) of an engine (21) of the vehicle (1), wherein the pre-cleaner (39)comprises a particle collecting space (41), and wherein the inlet (9) of the pump (7) isfluidly connected to the particle collecting space (41). The vehicle (1) according to claim 1412, wherein the pre-cleaner (39) comprises one or more cyclone separators (42). \\\\\\\\\\\\\ “A pump (7) configured to pump a fluid, wherein the pump (7) is configured to be mounted onto a vehicle (1) comprising a first vehicle structure (3) and a second vehiclestructure (5) resiliently suspended to the first vehicle structure (3), wherein the pump (7) comprises: - an inlet (9),- an outlet (11), - a pumping chamber (13), and - a first and a second portion (15, 17), wherein the first portion (15) is configured to be operably connected to the first vehiclestructure (3). “ “ and the second portion (17) isconfigured to be operably connected to the second vehicle structure ,_.§_;}_.___such that the pump (7) pumps fluid from the inlet (9) to the outlet (11) through the pumping chamber (13) upon a relative movement between the first andsecond vehicle structures (3, 5). inlet system (27) for a vehicle (1), wherein the inlet system (27) comprises afirst conduit section (29) configured to be attached to a first vehicle structure (3) of thevehicle (1), a second conduit section (31) configured to be attached to a second vehiclestructure (5) of the vehicle (1), wherein the second vehicle structure (5) is resilientlysuspended to the first vehicle structure (3), and wherein the inlet system (27) furthercomprises a pump (7) comprising an inlet (9), an outlet (11), and a pumping chamber(13), wherein the pump (7) further comprises a first portion (15) operably connected tothe first conduit section (29) and a second portion (17) operably connected to the secondconduit section (31) such that the pump (7) pumps fluid from the inlet (9) to the outlet(11) through the pumping chamber (13) upon a relative movement between the first andsecond conduit sections (29, 31 ). The inlet system (27) according to claim -t-ïiš, wherein the inlet system (27) further comprises a first bellow (33) fluidly connecting the first and second conduitsections (29, 31), wherein the pumping chamber (13) is arranged adjacent to the firstbellow (33). ggggggggggggggg “The inlet system (27) according to claim lflfâfgmor ltêlë, wherein the pump (7) comprises a second bellow (35), and wherein walls (37) of the second bellow (35)delimits the pumping chamber (13). The inlet system (27) according to claim iêfjåand 1911, wherein the first and second bellows (33, 35) are provided in a single piece of material. 'x ______________ __The inlet system (27) according to any one of the claims 43-15- êëﬂjå, wherein the inlet system (27) comprises a pre-cleaner (39) configured to separate particles froman air flow in the inlet system (27), wherein the pre-cleaner (39) comprises a particle 4 collecting space (41), and wherein the inlet (9) of the pump (7) is fluidly connected to theparticle collecting space (41). The inlet system (27) according to claim älg, wherein the pre-cleaner (39) comprises one or more cyclone separators (42).