• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for ventilation of the engine compartment (2) of a particularly tight vehicle (1), preferably comprising a housing (7) which encloses the engine (3) and gearbox of the vehicle (4), and a cooling air shaft (10) which leads air to / from a radiator package (9). The invention is achieved in that the ventilation duct (13) is arranged between the engine compartment (2) and the cooling air shaft (10) and which ventilation duct (13) leads air from the engine compartment (2) to the cooling air shaft (10), and that the outlet opening (14) of the ventilation duct (13) is arranged in the air flow of the cooling air shaft (10), an ejector effect being achieved in the outlet opening (14). (Figure 1)
    公开号:SE1450801A1
    申请号:SE1450801
    申请日:2014-06-30
    公开日:2015-12-31
    发明作者:Tobias Lehner；Martin Forslund
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    15 20 25 30 35 or similar (there are usually several heat exchangers in a radiator package, eg for charge air, water, oil, etc.) at the passage through the radiator package and that air therefore cools / ventilates the engine compartment less efficiently or even heats areas in the space.
    According to known technology, there are also other strategies for ventilating an engine compartment. The most common way is thus that the cooling air fan sucks in ambient air through the radiator package, which is then blown / pressed in over the driveline components. This creates an overpressure in the engine compartment which is then ventilated out through outlet openings at the rear of the vehicle body, usually via one or more high-positioned outlet openings in the engine compartment at the rear of the vehicle. Of course, it is also possible to arrange a cooling air fan which instead pushes / sucks the air from the engine compartment through the radiator package. A negative pressure is then formed in the engine compartment which causes colder ambient air to be sucked into the engine compartment via openings arranged therefor. However, this results in poorer cooling performance in the radiator package as the air passing through the radiator package has been heated as it flows through the engine compartment. and also leads to a dirtier engine compartment because a large amount of dusty / dirty air is then sucked into the engine compartment. In all cases, the fan air has been pushed directly into or sucked into the engine compartment to cool it.
    Today's known solutions mean that you are forced to choose between a warmer engine compartment and better cooling performance in the radiator package, or a cooler engine compartment with poorer cooling performance in the radiator package and with a dirtier engine compartment.
    To counteract these problems, it is possible to separate the cooling air flow through the radiator package from the flow through the engine compartment. But this means that the air flow around the engine risks decreasing or becoming more or less stagnant and unwanted and harmful heat accumulations can then occur.
    This is especially a risk factor when operating at low speeds, which often occurs in commercial traffic such as in bus traffic. Well-sized ventilation openings adjacent to the vehicle's engine compartment can counteract this unwanted heat build-up, but its effect is often insufficient and also leads to an unfavorable increased emission of sound and, as mentioned, a dirtier engine compartment, especially if the inlet areas are made larger.
    It is important that these disadvantages are reduced. Rising demands for lower noise emissions also mean that the ventilation openings in the vehicle's outer body must be reduced / reduced.
    The problem is thus to design a ventilation system that reduces the emission of disturbing noise from the vehicle but which at the same time leads to better cooling of both the engine compartment and the radiator package and which still does not result in more dirt and dust being led into the engine compartment.
    A number of attempts have been made in the past to solve these problems and to propose a ventilation system which reduces the emission of disturbing noise from the vehicle but which retains or improves the cooling of both engine compartment and radiator package without causing more dirt and dust to be introduced. in the engine compartment.
    GB2045183 describes, for example, a cooling system for an engine comprising a radiator and a cooling fan motor. The radiator and the cooling air fan are separated from the engine compartment and the heated air that has passed the radiator is led out of the vehicle and into the surrounding air without passing the engine compartment. The exhaust gases are also allowed to mix with this air and thus a reduction of disturbing noise from the vehicle is achieved. A disadvantage of this system is that the engine compartment is not cooled efficiently. In addition, part of the cooling air must be used here to cool the vehicle's exhaust pipe. SE532810 describes an engine compartment ventilation device which comprises a radiator package and a cooling air fan which affects the air flow through the radiator package. The radiator package is shielded from the engine compartment and the cooling air fan also sucks air from the engine compartment through a duct or opening arranged for this purpose. Due to the negative pressure formed in the engine compartment, ambient air is sucked into the engine compartment via at least one opening between the engine compartment and the outside of the vehicle, and results in overtemperatures in the engine compartment being avoided. A disadvantage of this system is that a larger cooling fan motor must be used so that it can handle the larger amount of air. A larger engine requires more energy to run.
    EP0735252 further discloses a cooling system for an engine in a commercial vehicle. The engine compartment is separated from the cooling system by a sound barrier. The engine compartment and cooling system receive air from the surroundings through various inlets. The cooling air fan is equipped with a diffuser that causes air to be sucked out of the engine compartment and led out of the vehicle together with the air that has passed the radiator package. The disadvantage of this system is that here too a larger cooling fan motor is required so that it is able to handle the larger amount of air that must flow through both the radiator package and the engine compartment.
    US6523520 describes yet another variant of a cooling system for an engine which is delimited from the cooling system. A cooling air fan located at the vehicle's radiator sucks air simultaneously through the cooling package and from the engine via a duct system arranged therefor. The duct system directs ambient air past particularly hot parts of the engine before it is led out through an outlet opening in the vehicle.
    Thus, the prior art does not show a ventilation system which reduces the emission of disturbing noise from the vehicle and which maintains or improves the cooling of both the engine compartment and the radiator package and without causing more dirt and dust to be led into the engine compartment.
    SUMMARY OF THE INVENTION An object of the invention is thus to solve the above-mentioned problems and to demonstrate a ventilation system which reduces the emission of disturbing noise from the vehicle to the surroundings but which at the same time maintains or improves the cooling of both engine compartment and radiator package.
    A further object of the invention is that the solution should be self-regulating, ie. when the engine compartment gets hotter, the ventilation should automatically increase.
    A further object of the invention is to reduce the size and / or number of ventilation openings in the body sides of the vehicle.
    A further object of the invention is that the ventilation device should require as little energy as possible for its operation.
    A further object of the invention is that the construction should also reduce the amount of dirt and dust which is led into the engine compartment.
    A further object of the invention is that the solution should be in principle simple and the parts simple and cost-effective to manufacture.
    These and further objects and advantages are achieved according to the invention by a ventilation device defined by the features stated in the characterizing part of the independent claims 1 and 6. The invention is thus particularly intended for commercial vehicles such as buses but can of course be used for other vehicles such as trucks, construction machinery or other types of vehicles where there is a need for a ventilation device that reduces the emission of disturbing noise from the vehicle but still maintains or improves the cooling of both engine compartment and radiator package without increasing the degree of contamination of the engine compartment.
    The solution according to the invention applies in particular to vehicle installations where the cooling air fan is located on the side of the vehicle / bus in a separate cooling air shaft. In such an engine compartment layout where the fan air from the radiator package is led into a cooling shaft separated from the engine compartment / driveline compartment, the hot air will not mix with the air in the engine compartment and the cooling air fan can therefore not be used directly to create ventilation of the engine compartment.
    The invention is thus achieved by arranging an engine compartment ventilation in a vehicle comprising a ventilation duct, e.g. a pipe, from the upper part of the engine compartment and that the outlet of the ventilation duct is located in the cooling air shaft so that a negative pressure is created in the ventilation duct and thus in the engine compartment. The negative pressure created at the outlet of the ventilation duct thus generates a flow out of the ventilation duct and thus out of the engine compartment which in turn results in ambient air being sucked into the engine compartment via at least one opening between the engine compartment and the outside / underside of the vehicle.
    The air inlet to the engine compartment is suggested to be placed low, e.g. at or near the PTO shaft of the vehicle. The air gradually heated by the engine flows out through the ventilation duct whose inlet is preferably arranged in the upper part of the engine compartment and its outlet is arranged in the cooling air shaft, for example so that the air out of the ventilation duct flows substantially parallel to the air flow of the cooling air shaft. 10 15 20 25 30 35 The direction of rotation of the cooling air fan is advantageously chosen so that the air from the cooling air fan is thrown / pressed in an optimal way via the roof of the cooling air shaft and out through the cooling air outlet opening / grille arranged in the vehicle's outer body.
    The velocity of the air flow then becomes the highest and mainly laminar near the roof and in the rear part of the cooling shaft.
    Alternatively, the ventilation duct may consist of one or more slits / gaps / slots arranged in the inner wall of the cooling air shaft, each of which is designed, for example, with an oblique surface or wing, in the wall which is placed towards the engine compartment. The slits with their wide surface facing the air stream of the cooling air shaft, an opening is created behind it arranged in the direction of the air flow of the cooling air shaft, the air flow of the cooling air shaft passing past this slot and wing creates a negative pressure downstream, after, the slit and then pulls through ejector action, carrying air from the engine compartment.
    The speed of the air in the cooling air shaft, and thus the suction from the engine compartment, increases automatically as the temperature in the engine and / or in the engine compartment increases and the system indicates that more cooling is needed.
    Advantages of the construction according to the invention are that a so-called active ventilation of the engine compartment without the need to install extra cooling air fans. The cooling effect for the radiator package is mainly not affected and the system also uses in principle "consumed" cooling air to create a negative pressure in the ventilation duct / slot and thus an increased suction from the engine compartment.
    A further advantage of the solution according to the invention is that no additional software will have to be developed for the ventilation to be able to be controlled based on the engine's cooling needs. When the engine gets hot and via the basic system "requests more fan" to lower the temperature of the cooling water, the suction from the ventilation duct is also automatically increased.When the engine generates the most heat, the air flow / suction will also be 10 15 20 25 30 35. also does not matter what type of cooling air fan, or the number of cooling air fans, are present and used in the vehicle.
    The solution is reliable at the same time as it requires a relatively small installation space in the vehicle. This makes the solution cheap to implement in, for example, new production of vehicles.
    Further features and advantages of the invention will become apparent from the following, more detailed description of the invention, and from the accompanying drawings and other claims.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention is described in more detail below in some preferred embodiments with reference to the accompanying drawings.
    Figure 1 shows from above a cross-section of the rear part of a bus where i.a. the engine compartment and a cooling air shaft are shown and where a ventilation duct is shown.
    Figure 2 shows in principle the same sketch as in figure 1, but where the ventilation duct consists of a slit or slit.
    DESCRIPTION OF PREFERRED EMBODIMENTS Figure 1 thus shows in principle a cross-section, seen from above, of the rear part of a vehicle 1, here a bus, where i.a. engine compartment 2 with its engine 3 and gearbox 4 is shown. A PTO shaft 5 transmits the torque from the engine 3 and its gearbox 4 to the drive wheels 6.
    Motor 3 and gearbox 4 are here enclosed in a common shielded housing 7 which forms a substantially closed engine space 2. The housing 7 can advantageously be sound-insulated with a mat (not shown) intended therefor, preferably arranged on the housing. 7 inside.
    The solution according to the invention applies in particular to engine installations where a cooling air fan 8 and radiator package 9 are placed in a separate cooling air shaft 10 arranged next to the engine compartment 2. Since the cooling air shaft 10 is completely separated from the engine compartment 2, the hot air which has passed the radiator package 9 will not to mix with the air directed to the engine compartment 2.
    The air inlet 11 to the engine compartment 2 is advantageously located in the vehicle 1, for example as down here at the propeller shaft 5, and is suitably designed so that air passes in at the passage of the propeller shaft 5 in the wall 12 to the engine compartment housing 7.
    The air flowing in via the air inlet 11 flows around the engine 3 and when it is heated by the various components of the engine, such as turbochargers, exhaust manifolds etc. (not shown), it rises by means of convection upwards in the engine compartment 2 and reaches the upper part or roof arranged (not shown). In or near the roof, a ventilation duct 13 in the form of a pipe. The ventilation duct 13 extends from the engine compartment 2 and into the cooling air shaft 10 and opens into it via an outlet opening 14.
    The outlet opening 14 can advantageously be angled and directed so that its outer part is arranged parallel to the longitudinal direction of the cooling air shaft 10 and the air flowing in the cooling air shaft 10.
    At the outlet of the ventilation duct 13, through the air flow from the cooling air fan 8, a negative pressure is created which is created by the increase in speed caused by the air passing through the outlet opening 14 of the ventilation duct 13. This creates an ejector effect which draws air out of the ventilation duct 13 and thus out engine compartment 2. 10 2 20 20 25 30 35 10 Figure 2 shows in principle the same sketch as in figure 1, but here the ventilation duct 13 is designed as at least one slot in the form of a recess (gap or gap) arranged in the inner wall 15 of the cooling air shaft 10, i.e. in the wall 15 located between the engine compartment 2 and the cooling air shaft 10.
    The slit may, for example, be provided with an oblique flange 17 or wing which is angled out from the wall 15 and whose outer surface faces the flow direction of the air flow in the cooling air shaft 10.
    A ventilation duct 13 is thus created behind this flange 17, which through the by-passing air causes an ejector effect which draws air from the engine compartment 2 into the cooling air shaft 10. The slot outlet 14 is thus arranged downstream of the cooling air fan 8 and the radiator package 9. The ventilation duct 13 may consist of several with flanges 17 placed one after the other in the wall 15 (not shown).
    An advantage of the described solution is that an active ventilation of the engine compartment 2 is achieved without the need for additional cooling air fans 8 to be installed. The control of the air flow also takes place automatically and the cooling effect of the air flow is directly connected to how much the cooling air fan 8 is controlled by the existing engine control system. The solution minimizes the requirement for installation space and keeps the sound emissions from the vehicle 1 at a low level.
    The description above is primarily intended to facilitate the understanding of the invention and is of course not limited to the stated embodiments, but other variants of the invention are also possible and conceivable within the scope of the inventive concept and the scope of subsequent claims.
    权利要求:
    Claims (7)
    [1]
    Device for ventilation of in particular a vehicle (1) preferably comprising a housing (7) (4), (10) which directs air to / from a radiator package engine compartment (2) enclosing the vehicle engine (3) and gearbox and a cooling air shaft (9), characterized by (13) is arranged between the engine compartment (10) that a ventilation duct and which ventilation duct to the cooling air shaft (2) and the cooling air shaft (13) conduct air from the engine compartment (2) (10), and that the ventilation duct is arranged (10 ) (13) outlet opening (14) in the air stream of the cooling air shaft, whereby an ejector effect is achieved in the outlet opening (14).
    [2]
    Device according to Claim 1, characterized in that the outlet opening (14) of the ventilation duct (13) is arranged downstream of the radiator package (9) and / or the cooling air fan (8).
    [3]
    Device according to Claim 1 or 2, characterized in that the ventilation duct (13) consists of at least one recess or slot arranged in the wall (15) of the cooling air shaft (10).
    [4]
    Device according to one of the preceding claims, characterized in that the recess / slot is provided with a flange (17) arranged upstream of the slot (14). so that an ejector effect is achieved in the outlet opening
    [5]
    Device according to one of the preceding claims, characterized in that until the flange (17) is angled out from the outer surface of the wall (15), it is arranged facing the flow direction of the air flow in the cooling air shaft (10).
    [6]
    Device according to one of the preceding claims, characterized in that the outlet of the ventilation duct (13) from the engine compartment (2) is arranged at or near the upper part of the housing (7).
    [7]
    Vehicle comprising a device according to one or more of the device claims 1-6.
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    同族专利:
    公开号 | 公开日
    DE102015008060A1|2015-12-31|
    SE538886C2|2017-01-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB2045183B|1979-03-13|1983-05-05|Aveling Barford Ltd|Silencing and cooling vehicle engines|
    US5590624A|1995-03-31|1997-01-07|Caterpillar Inc.|Engine cooling systems|
    US6523520B1|2001-01-22|2003-02-25|Probir Chatterjea & Associates, Inc.|Engine cooling and noise suppression system|SE540084C2|2016-07-04|2018-03-20|Scania Cv Ab|Ventilation device for venting a space, in particular an engine room of a vehicle|
    US10527012B2|2017-06-29|2020-01-07|Pratt & Whitney Canada Corp.|Engine assembly with engine and cooler compartments|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1450801A|SE538886C2|2014-06-30|2014-06-30|Device for engine room ventilation by means of cooling air fan|SE1450801A| SE538886C2|2014-06-30|2014-06-30|Device for engine room ventilation by means of cooling air fan|
    DE102015008060.1A| DE102015008060A1|2014-06-30|2015-06-24|Device for engine compartment ventilation with the help of a cooling air blower|
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