WO2008082358A1

WO2008082358A1 - A cooling water system intended for a snow scooter

Info

Publication number: WO2008082358A1
Application number: PCT/SE2008/000004
Authority: WO
Inventors: Anders Sterner
Original assignee: Snowolverine Ab
Priority date: 2007-01-02
Filing date: 2008-01-02
Publication date: 2008-07-10

Abstract

The present invention encompasses a system intended for a snow scooter for cooling of circulating cooling water displaying a mixture of water and an antifreeze agent, generated as a heated cooling water from a combustion engine (2) and where the snow scooter (1) is provided with allocated tube parts (A, B) in order int. al. to be able to form therefrom a chassis structure and where selected tube parts (B2, B3, B5) are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated water, and where this loop directly or indirectly is coupled to the combustion engine (2) in order to receive the cooling water heated therein. The loop ('A', 'B') cooling the water is divided so as to form in any event two, connected in parallel, loop sections ('A' and 'B', respectively), one loop section ('B'), adapted and oriented on a right side of a centre plane ('C') given to the chassis structure (seen in the normal direction of travel of the snow scooter), and one loop section ('A'), adapted and oriented on a left side of the centre plane allocated to said chassis structure.

Description

TITLE OF THE INVENTION: A cooling water system intended for a snow scooter

TECHNICAL FIELD The present invention relates in general to a system for a snow scooter, and more specially to a system for cooling with the aid of, a circulating cooling water, displaying a mixture of water and an antifreeze agent.

The following description intends as an abbreviation to disclose only "cooling water".

The cooling of water-cooled combustion engines takes place such that heat formed by the combustion engine in operation is transferred to cooling water ducts within the engine and heated therein in order to form a "heated cooling water". This heated cooling water is normally transferred to an air/water heat exchanger, via a thermostat control, in order to be cooled therein and be supplied once again to the combustion engine as a "cooled cooling water".

With this brief general description and in an application to snow scooters, the present invention is based on a system intended for a snow scooter where heated cooling water is generated from the operation of the combustion engine.

More specially, the present invention is based on the feature that the snow scooter is to be given coordinated tube parts, in order int. al. thereby to be able to form a load carrying chassis structure.

More specially, the chassis structure is to be constructed such that, with the aid of selected tube parts, it may be coordinated and interconnected such that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated cooling water, and where this loop is directly or indirectly to be connected to the combustion engine, in order to receive and circulate the cooling water heated therein. BACKGROUND ART

Methods, arrangements and constructions related to the above disclosed technical field and nature are previously known in a plurality of different embodiments.

As a first example of the background art and the technical field to which the invention relates mention might be made of a system intended for a snow scooter for cooling a circulating cooling water displaying a mixture of water and an antifreeze agent, generated as heated cooling water from a combustion engine.

Here, the snow scooter is provided with coordinated tube parts in order int. al. to be able to form therefrom a chassis structure and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated cooling water, and where this loop directly or indirectly is to be connected to the combustion engine in order to receive the cooling water heated therein.

As one example of this technical field and its construction and design reference is made to the contents of Patent Publication USPS 6,109,217-A, where Figs. 1 and 2 in this patent publication have been introduced in the following description as one example of the prior art.

In this publication is disclosed the utilisation of a number of series-connected heat exchangers of the air/water type, where certain tubular part sections can be utilised in order to make for the transport of successively cooled cooling water between specially constructed rear and front transversely directed heat exchangers.

Also forming part of the prior art are the contents of the following Patent Specifications: US-2006/0 071 466-A1 and USPS 5,944,133-A. BRIEF SUMMARY OF THE INVENTION TECHNICAL PROBLEM

Taking into account the circumstance that the technical considerations which a person skilled in the art must do in order to be able to offer a solution to one or more set technical problems is on the one hand initially a necessary insight into the measures and/or the sequence of measures to be implemented and on the other hand a necessary selection of the means required, in view hereof the following technical problems are likely to be relevant in the evolution of the subject matter of the present invention.

Taking into account the state of the art as described above, it is probably therefore likely to be seen as a technical problem to be able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order, in a system intended for a snow scooter, for cooling of a circulated cooling water displaying, a mixture of water and an antifreeze agent, generated as heated cooling water from a combustion engine, where the snow scooter is provided with coordinated tube parts in order int. al. to be able to form therefrom a chassis structure and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated water, and where this loop directly or indirectly can be connected to the combustion engine in order to receive the cooling water heated therein, to be able to realise the importance of dimensioning the cooling water circuit so that it can be included in a frame construction for a snow scooter and make possible a diversion of heat which wholly, or in any event partly, corresponds to the full power of the combustion engine and other external circumstances unsuitable for the cooling.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order within selected and elongate parts belonging to the chassis to create a combination of an effective cooling system and a flexurally rigid and flexible chassis structure for the purpose. There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause the tube loop cooling water to be divided so as to form in any event two, parallel-connected, loop sections, a first loop section adapted and oriented on a right side of a centre plane of the chassis structure (seen in the normal direction of travel of the snow scooter), and a second loop section, adapted and oriented on a left side of said centre plane of the chassis structure.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause the first loop section and the second loop section to be formed alike, or in any event substantially alike, and in principle mirror-reversed in relation to said centre plane.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause selected tube parts oriented in parallel and/or substantially in parallel and conducting cooling water, within one and the same loop section, to be dimensioned and/or formed as bearing construction elements for the chassis structure.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order, within one and the same loop section to create such preconditions that there are tube parts oriented in parallel and/or substantially in parallel and/or interconnected, in order with the aid of a number of parallel cooling water flows to be able to reduce the through flow speed of the cooling water proportions and thereby to be able to increase the obtained cooling effect.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order that a plate serving as foot support for a shoe, brogue or boot supporting the driver and/or a shoe, brogue or boot supporting the passenger will be adapted to extend between tube parts extending in parallel and/or substantially parallel.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order for edgings adapted to said plate, in parallel and/or substantially in parallel, to be adapted and formed in order wholly or partly to be able to surround part portions of said tube parts in order thereby to be able to create the preconditions for a thermal transfer direct from the part portions of the tube sections to principally one or both of the edgings of the plate.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to make an outermost located tube part in relation to the centre plane to be adapted to be able to cooperate with an outer edging allocated to the plate by causing the edging to be given a part of a circular configuration and in addition given an angular surround of between 70 and 110°, for instance about 90°.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause an innermost located tube part in relation to the centre plane to be adapted to be able to cooperate with an inner edging provided for the plate by causing the edging to be given a part of a circular configuration and in addition given an angular surround of between 180 and 300°, for instance about 135°.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause one or more tube parts to be given an outer diameter of between 35 and 15 mm, for instance 20 to 25 mm. There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause a material thickness for one or more of the formed tube parts to be selected to 1.0 to 3.0 mm, for instance about 1.2 to 1.8 mm.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause said plate to be adapted, between said (parallel) tube parts, to display through-going holes or the like, where the number of holes may be adapted to between 2 and 5, as well as oriented transversely of the longitudinally directed orientation of the tube parts and the plate.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause the plate to be adapted so that it displays a first large surface section, serving as the foot support proper, and with a rearwardly directed and rearwardly tapering second smaller surface portion or surface section.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause the holes, distributed along the second smaller surface portion, to be distributed with a larger mutual spacing from one another than a selected distribution along the first larger surface portion.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause a distance between flaps, formed to the edging and/or edgings of the plate, for cooperation with its allocated tube part, and a width given to the flap to be selected so as to satisfy a ratio between 0.5 and 1.5, for instance 0.8 and 1.2. There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause one or more utilised tube parts to connect to a three-way valve, in order via this to be able to divert cooling water and/or cooling water flows to one or more cooling loops, distributed within a seat construction.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause said three-way valve to be connected into a return conduit for cooled cooling water.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause said tube section and or tube parts to be formed from a metal material, connecting wholly or partly to the metal material for the plate and its edgings.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order to cause said holes or recesses to be given one and the same direction for a centre line given for each respective hole or recess.

There resides a technical problem in being able to realise the importance of, the advantages associated with and/or the technical measures and considerations which will be required in order for said centre line for selected holes to be adapted to form a right angle to a plane given to the upper surface of the plate alternatively to cause said centre line for selected holes to be adapted to make an acute angle with the plane given to the upper surface of the plate and in the latter application with the centre line adapted to be oriented in parallel with said centre plane and with the centre line inclining rearwards in a normal direction of travel. SOLUTION

In such instance, the present invention takes as its point of departure the prior art technology disclosed by way of introduction and builds on a system intended for a snow scooter for cooling of a circulating cooling water displaying a mixture of water and an antifreeze agent, generated as heated cooling water from a combustion engine, where the snow scooter is given coordinated tube parts in order int. al. to be able to form therefrom a chassis structure and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated water and where said loop directly or indirectly is to be connected to the combustion engine in order to receive the cooling water heated therein.

In order to be able to solve one or more of the above disclosed technical problems, the present invention more specially disclosed that the prior art technique is thus to be supplemented by the feature that the tube loop cooling water is to be divided so as to form, in any event two, loop sections coupled in parallel, a first loop section, adapted and oriented on a right side of a centre plane given to the chassis structure (seen in the normal direction of travel of the snow scooter), and a second loop section, adapted and oriented on a left side of the centre plane allocated to said chassis structure.

As preferred embodiments, falling within the scope of the basic idea of the present invention, it is moreover disclosed that the first loop section and the second loop section should be, formed alike, or in any event substantially alike, and mirror- reversed in relation to said centre plane.

Selected tube parts oriented in parallel and/or substantially parallel, within one and the same loop section, are to be dimensioned and/or formed as bearing constructional elements for the chassis structure.

Within one and the same loop section there are tube parts oriented in parallel and/or substantially parallel and/or interconnected, in order with the aid of a number of parallel cooling water flows to be able to reduce the through flow speed of the cooling water proportions.

A plate serving as a foot support for a shoe, brogue or boot carrying the driver and/or a shoe, brogue or boot carrying the passenger is to be adapted to extend between tube parts extending in parallel, and/or substantially parallel.

The present invention discloses that edgings adapted in parallel and/or substantially parallel to said plate are to be formed in order wholly or partly to be able to surround part portions of said tube parts in order thereby to be able to create the preconditions for a thermal transfer direct from the part portions of the tube sections to principally the one or more advantageously both of the edgings of the plate.

An outermost located tube part relative to the centre plane may then be adapted to be able to cooperate with an outer edging provided for the plate by giving to the edging a part of a circular configuration and an angle surrounding of between 70 and 110°, for instance about 90°.

An innermost located tube part relative to the centre plane is then to be adapted to be able to cooperate with an inner edging provided for the plate by giving to the edging a part of a circular configuration and an angle surrounding of between 180 and 300°, for instance about 135°.

One or more tube parts may then be given an outer diameter of between 35 and 15 mm, for instance 20 to 25 mm.

A material thickness for one or more of the formed tube parts should then be selected to 1.0 to 3.0 mm, for instance about 1.2 to 1.8 mm.

For thermal transport from the tube parts, said plate is adapted to display, between said parallel tube parts, through-going holes or recesses, where the number of holes in a row may be adapted to between 2 and 5 and oriented transversely of the tube parts and in the longitudinal orientation of the plate.

The plate may then be adapted with a first large surface section, serving as the foot support proper, and with a rearwardly directed and rearwardly tapering second smaller surface portion or surface section.

Holes, distributed along the second smaller surface portion, are distributed with a larger mutual spacing from one another than a selected distribution along the first larger surface portion.

A distance between flaps formed to the edging and/or edgings of the plate for cooperation with their allocated tube part and a width given to the flap is to be selected to satisfy a ratio between 0.5 and 1.5, for instance 0.8 and 1.2.

To one or more of the tube parts, there is connected a three-way valve, in order via this to permit diversion of cooling water to one or more cooling loops, distributed within a seat construction.

Said three-way valve may advantageously be coupled in to a return conduit for the cooling water.

Said tube section and/or tube parts may advantageously be formed from a metal material, connecting to the metal material for the plate and its edgings.

Said holes should be given one and the same direction for a centre line allocated for each hole.

For selected holes, said centre line may be adapted to form a right angle to a plane given to the upper surface of the plate. For other selected holes, said centre line may be adapted to make an acute angle to the plane given to the upper surface of the plate and with the centre line adapted in parallel oriented to said centre plane as well as with the centre line inclining rearwards, in a normal direction of travel.

ADVANTAGES

Those advantages which may principally be deemed to be characteristic of the present invention and the specific significative characterising features disclosed thereby are that there have hereby been created the preconditions in order, in a system intended for a snow scooter for cooling of a circulating cooling water displaying a mixture of water and an antifreeze agent, generated as a heated cooling water from a combustion engine, where the snow scooter is provided with coordinated tube parts in order int. al. to be able to form therefrom a chassis structure and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated water, and where this loop directly or indirectly is connected to the combustion engine in order to receive the cooling water heated therein to disclose that the loop cooling the water is to be divided so as to form, in any event two, loop sections connected or connectable in parallel, a first loop section, adapted and oriented on a right side of a centre plane given to the chassis structure and a second loop section adapted and oriented on a left side of the centre plane allocated to said chassis structure.

That which may principally be deemed to be characteristic of the present invention is disclosed in the characterising clause of appended Claim 1.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The prior art and one currently proposed embodiment, displaying the significative characterising features associated with the present invention will now be described in greater detail hereinbelow for purposes of exemplification with reference to the accompanying Drawings, where:

Fig. 1 shows the snow scooter arrangement illustrated, as Fig. 1, in Patent Publication US-6,109,217-A; while

Fig. 2 shows the principles of a known system for a snow scooter, for cooling of a circulating cooling water displaying a mixture of water and antifreeze agent from a combustion engine with series connection of a forward and a rear transversely directed air/water heat exchanger via tube parts allocated to the chassis; Fig. 3 shows the principles of a system intended for a snow scooter, in accordance with the disclosures given within the framework of the present invention, for cooling of, a circulating cooling water displaying a mixture or water and antifreeze agent, from a combustion engine with a parallel coupling of cooling water flows via tube parts allocated to the chassis; Fig. 4 shows in section and on a magnified scale a view of a footplate with its two tube parts;

Fig. 5 shows a coupling to a seat construction with the utilisation of a three-way valve; and Fig. 6 is a perspective view on a slightly larger scale in relation to Fig. 3 of a section of the footplate or foot support with its plate secured to the parallel tube parts and with the directions of selected centre lines valid for formed through-going holes or recesses.

DESCRIPTION OF PRIOR ART ACCORDING TO FIGS. 1 AND 2 IN PATENT PUBLICATION US-6,109,217-A.

Figs. 1 and 2 illustrate a prior art system intended for a snow scooter for cooling of a cooling water circulating by a circulation pump, displaying a mixture of water and an antifreeze agent, generated as heated cooling water from a combustion engine.

Here, the snow scooter 10 is given coordinated tube parts in order int. al. to be able to form therefrom a part of a chassis structure. Selected tube parts, hoses etc. are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a tube loop diverting heat and/or cooling heated water.

This loop is directly coupled into the combustion engine in order to receive the cooling water heated therein.

More specially, it is disclosed, in Fig. 2, that a hose section (44:1) is interconnected with a first heat exchanger (46), on the right side of the snow scooter (10).

From this heat exchanger (46) cooling water is led, via a second hose section (44:2) to a second heat exchanger, a rear heat exchanger (48).

From this rear heat exchanger (48) cooled or temperature-reduced cooling water is now led, via a third hose section (44:3), to a heat exchanger (50), on the left side of the snow scooter (10).

Via a fourth hose section (44:4) cooling water is now led to a forward heat exchanger (52) in order via a fifth hose section (44:5) to be led, further cooled, back to the engine (28).

It is here disclosed that all five hose sections and all heat exchangers are interconnected with one another via a direct series connection.

More specially, it is disclosed that the side-related heat exchangers (46, 50) consist of tubular parts, but with narrow outer wings or vanes in order to some extent to increase the heat exchange, and placed as separate units to and oriented as outer elongate edge protection for the footstep. (Cf. Fig. 4 in the disclosed patent publication.) DESCRIPTION OF CURRENTLY PROPOSED EMBODIMENT

By way of introduction, it should be emphasised that in the subsequent description of one currently proposed embodiment displaying the significative characterising features associated with the present invention and which has been clarified by means of the figures shown in the accompanying Drawings, we have selected terms and a specific terminology with the intention in such instance principally of clarifying the inventive concept proper.

However, in this context it should be taken into consideration that expressions selected here should not be seen as restrictive exclusively to the terms utilised and selected here, but that it should be understood that every such selected term is to be interpreted so that in addition it encompasses all technical equivalents which function in the same or substantially the same manner in order in such instance to be able to attain the same or substantially the same object and/or technical effect.

With reference to accompanying Figs. 3 to 6, there are thus shown schematically and in detail the basic preconditions for the present invention and where the significative properties associated with the invention have been given concrete form as a result of the currently proposed embodiment described in greater detail hereinbelow.

Thus, Fig. 4 shows parts of the system intended for a snow scooter significative of the present invention for cooling of a circulating water, displaying a mixture of water and an antifreeze agent, generated as a heated cooling water from a combustion engine 2 not shown in greater detail.

Heated cooling water is connected to an inlet "In" and passes heat exchangers connected in parallel and recycled as cooled and temperature-reduced cooling water to an outlet "Out".

The snow scooter 1 is given coordinated tube parts, of which a few are apparent from Fig. 3 in order int. al. to be able to form therefrom a complete chassis structure Ia and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a loop diverting heat and/or cooling heated water, and where this loop directly or indirectly is to be connected to the combustion engine 2, in order to receive the cooling water heated therein and thermostat controlled.

The loop cooling water is here divided so as to form in any event two, connected in parallel, loop sections, where a first loop section "A" is adapted and oriented on a right side of a centre plane "C" allocated to the chassis structure Ia (viewed in the normal direction of travel of the snow scooter), and where a second loop section "B" is adapted and oriented on a left side of the said centre plane "C" allocated to the chassis structure 1 a.

The first loop section "A" and the second loop section "B" are formed alike, or in any event substantially alike, and mirror-reversed to said centre plane "C".

Fig. 3 now perceptibly illustrates that the second loop section "B" encompasses a first tube part Bl, which is coupled each to its parallel tube parts B2, B3, forming edge portions for a foot support 3.

The parallel tube parts B2, B3 are downstream united, via a union point B4, and merges into a single return conduit B5, directly connected to the outlet "Out".

Correspondingly, there are corresponding tube parts for the first loop section "A", but these are not described in greater detail purely for purposes of clarification.

More specially, the present invention now discloses that the selected tube parts B2, B3 and B5 oriented in parallel and/or substantially in parallel, within one and the same loop section "B" are dimensioned and/or formed as bearing constructional elements for the chassis structure Ia, through int. al. orientation in a right angle to one another, where the tube parts B2, B3 are adapted to lie in a horizontal plane while the tube part B5 is to lie vertically over the two tube parts B2, B3 and adjacent the tube part B2. It should here be observed that "parallel" or "substantially parallel" means that the tube parts can largely be deemed to assume parallel orientations and that they thereby create the preconditions for int. al. parallel cooling water flows, illustrated with "arrows" in Fig. 3.

Thus it is apparent from Fig. 3 that within one and the same loop section "B" there are tube parts B2, B3 oriented in parallel and/or substantially in parallel and/or interconnected, in order with the aid of a number of parallel cooling water flows to be able to reduce the through flow speed of the cooling water proportions and thereby increase the thermal exchange between heated cooling water and the ambient surroundings with a specially designed footrest 3.

A plate 3 a serving as a foot support 3 for a shoed, brogue or boot supporting the driver and/or a shoe, brogue or boot supporting the passenger is adapted to extend between tube parts B2, B3 extending in parallel and/or substantially parallel and intended to conduct heat from the tube parts B2, B3.

Edgings 3b, 3c adapted to said plate 3a, parallel and/or substantially parallel, are adapted and formed in order wholly or partly to be able to surround selected part portions of said tube parts B2, B3 in order thereby to be able to create the preconditions for a thermal transfer direct from the part portions of the tube sections B2, B3 to principally the one or both of the edgings 3b, 3 c of the plate, which will be described in greater detail hereinbelow.

An outermost located tube part B3 relative to the centre plane "C" is adapted to be able to cooperate with an outer edging 3 c allocated to the plate in that the edging is given a part of a circular configuration and given an angular surround of between 70 and 110°, such as about 90°, which is clarified in Fig. 4.

An innermost located tube part B2 relative to the centre plane "C" is adapted to be able to cooperate with an inner edging 3d allocated to the plate 3 in that the edging is given a part of a circular configuration and given an angular surround of between 180 and 300°, such as about 135°, which is apparent from Fig. 4.

One or more of the utilised tube parts, such as the tube parts B2, B3 and B5, are for purposes of reinforcement given an outer diameter of between 35 and 15 mm, such as 20 to 25 mm and with a material thickness for one or more of the formed tube parts selected to be 1.0 to 3.0 mm, for instance about 1.2 to 1.8 mm, partly for the mechanical strength partly for the heat absorption and the thermal conductivity as well as the convection via the speed wind.

Said plate 3a is adapted, between said parallel tube parts B2, B3, to display through- going holes 3e, where the number of holes may be adapted to between 2 and 5 as well as oriented transversely of the longitudinally directed orientation of the tube parts B2, B3 and the plate.

The holes 3e are advantageously to be punched in order to upwardly form a non-skid protection for the plate 3 a.

A first large surface section or surface portion 3f, serving as the foot support 3 proper, is coordinated with a rearwardly directed and rearwardly tapering second smaller surface section or surface portion 3g.

Holes, distributed along the second smaller surface portion 3g, are distributed with a larger mutual spacing from one another than a selected distribution along the first larger surface portion 3f.

A distance "a" between flaps formed to the edging and/or edgings of the plate, for cooperation with their allocated tube part B3, and a width "b" given to the flap are selected so as to satisfy a ratio between 0.5 and 1.5, for instance 0.8 and 1.2. To one or more of the tube parts, such as the tube part B5 there is connected a three- way valve 4, in order via this to make for the diversion of cooling water to one or more cooling loops B6, distributed within a seat construction 5.

Said three-way valve 4 is here shown connected into a return conduit B5 for the cooling water.

Said tube section and/or tube parts are formed from a metal material, connecting to the metal material of the plate 3 and its edgings 3b, 3c.

Said holes are given one and the same direction for a centre line 3e' allocated for each respective hole.

For selected holes said centre line 3e' is adapted to form a right angle (Fig. 4) to a plane given to the upper surface 3 a of the plate.

For selected holes, said centre line 3e' is adapted to make an acute angle with the plane allocated to the upper surface of the plate and with the centre line adapted in parallel oriented to said centre plane "C" as well as with the centre line inclining rearwards, in a normal direction of travel. Fig. 6 illustrates different proposals for selected directions for the centre line 3e'.

The plate 3 is thus folded about the tube part B3 in order to form an outer edge portion and folded about the tube part B2 in order to form an inner edge portion, which is intended to extend upwards a selected distance "c" in a direction towards the tube part B5 in order there to form a cooling flange, with or without holes 3e or slots. The distance "c" should exceed the diameter of the tube part B2 by a factor of between 1.5 and 4.0, for instance about 2.5.

Even if the metal material in the tube parts B2, B3 and B5 has been selected as "SS2333" and with the same material selection in the plate 3, with a thickness of the plate 3 of 1.0 to 1.5 mm, for instance 1.25 mm, it is within the scope of possibilities of the invention to select other materials.

The correct choice of materials and correct dimensioning of the individual units makes for an adapted and sufficient cooling of a combustion engine with high power, without to that end requiring the installation of a cooler for the engine. A snow scooter without cooler gives a lighter construction than with a normal cooler associated with an engine, at the same time as the weight distribution will be altered rearwardly. Further, the parallel tubes B2, B3 and B5, filled with water, create a lowering of the point of gravity, in particular since a rear transversely oriented tube section B 6 can be made light.

The present invention, which is to relate to "A cooling water system intended for a snow scooter" may advantageously be coordinated with the contents in a copending Patent Application filed on today's date and entitled "An arrangement in a windscreen", a copending Patent Application filed on today's date and entitled "An apparatus for heating a part of a saddle" and a copending Patent Application filed on today's date and entitled "A saddle-like seating construction for a vehicle".

Thus, the descriptions, Claims and Drawings are to be deemed to constitute a part of this description.

The invention is naturally not restricted to the embodiment disclosed above by way of example, but may undergo modifications without departing from the scope of the inventive concept as illustrated in the appended Claims.

In particular, it should be observed that every illustrated unit and/or circuit can be combined with every other illustrated unit and/or circuit within the scope in order to be able to attain the desired technical function.

Claims

1. A system for a snow scooter for cooling of, a cooling water displaying a mixture of water and an antifreeze agent, generated as a heated cooling water from a combustion engine, where the snow scooter is given coordinated tube parts in order int. al. to be able to form therefrom a chassis structure, and where selected tube parts are coordinated and interconnected so that they can form, via one or more heat exchangers of air/water type, a loop diverting heat and/or cooling heated water, and where this loop directly or indirectly is coupled to the combustion engine to receive the cooling water heated therein, characterised in that the loop cooling the water is divided so as to form, in any event two, loop sections coupled in parallel, one loop section adapted and oriented on a right side of a centre plane given to the chassis structure (seen in the normal direction of travel of the snow scooter), and one loop section, adapted and oriented on a left side of the centre plane given to said chassis structure.

2. The system intended for a snow scooter as claimed in Claim 1, characterised in that a first loop section and a second loop section are, formed alike or in any event substantially alike, mirror-reversed to said centre plane.

3. The system intended for a snow scooter as claimed in Claim 1 or 2, characterised in that selected tube parts oriented in parallel and/or substantially in parallel, within one and the same loop section, are dimensioned and/or formed as bearing constructional elements for the chassis structure.

4. The system intended for a snow scooter as claimed in Claim 1, 2 or 3, characterised in that within one and the same loop section there are tube parts oriented in parallel and/or substantially in parallel and/or interconnected in order with the aid of a number of parallel cooling water flows to be able to reduce the through flow speed of the cooling water proportions.

5. The system intended for a snow scooter as claimed in Claim 1 or 4, characterised in that a plate serving as a foot support for a shoe, brogue or boot supporting the driver and/or a shoe, brogue or boot supporting the passenger is adapted to extend between tube parts extending in parallel and/or substantially in parallel.

6. The system intended for a snow scooter as claimed in Claim 5, characterised in that parallel and/or substantially parallel edgings adapted for said plate are formed in order wholly or partly to be able to surround part portions of said tube parts in order thereby to be able to create the preconditions for a thermal transfer direct from the part portions of the tube sections to principally the one or both of the edgings of the plate.

7. The system intended for a snow scooter as claimed in Claim 5 or 6, characterised in that an outermost located tube part relative to the centre plane is adapted to be able to cooperate with an outer edging allocated to the plate, in that the edging is given a part of a circular configuration and given an angular surround of between 70 and 110°, for instance about 90°.

8. The system intended for a snow scooter as claimed in Claim 5 or 6, characterised in that an innermost located tube part relative to the centre plane is adapted to be able to cooperate with an inner edging allocated to the plate, in that the edging is given a part of a circular configuration and given an angular surround of between 180 and 300°, for instance about 135°.

9. The system intended for a snow scooter as claimed in Claim 5, characterised in that one or more tube parts are given an outer diameter of between 35 and 15 mm, for instance 20 to 25 mm.

10. The system intended for a snow scooter as claimed in Claim 5 or 9, characterised in that a material thickness for one or more of the formed tube parts is selected to 1.0 to 3.0 mm, for instance about 1.2 to 1.8 mm.

11. The system intended for a snow scooter as claimed in Claim 5, characterised in that said plate is adapted, between said parallel tube parts, to display through-going holes, where the number of holes may be adapted to between 2 and 5 as well as oriented transversely of the longitudinal orientation of the tube parts and the plate.

12. The system intended for a snow scooter as claimed in Claim 5 or 11, characterised in that the plate is adapted with a first large surface section, serving as the foot support proper, and with a rearwardly directed and rearwardly tapering second smaller surface portion.

13. The system intended for a snow scooter as claimed in Claim 11 or 12, characterised in that holes, allocated along the second smaller surface portion, are allocated with a larger mutual spacing from one another than a selected allocation along the first larger surface portion.

14. The system intended for a snow scooter as claimed in Claim 1, 5 or 8, characterised in that a distance between, flaps, formed to the edging and/or edgings of the plate for cooperation with its allocated tube part, and a width given to the flap are selected in order to satisfy a ratio of between 0.5 and 1.5, for instance 0.8 and 1.2.

15. The system intended for a snow scooter as claimed in Claim 1, characterised in that there is connected to one or more of the tube parts a three-way valve, in order via this to make for the diversion of cooling water to one or more cooling loops, distributed within a seat construction.

16. The system intended for a snow scooter as claimed in Claim 15, characterised in that said three-way valve is coupled into a return conduit for the cooling water.

17. The system intended for a snow scooter as claimed in Claim 1, characterised in that said tube section and/or tube parts are formed from a metal material, connecting to the metal material for the plate and its edgings.

18. The system intended for a snow scooter as claimed in Claim 1, 5 or 11, characterised in that said holes are given one and the same direction for a centre line allocated for each respective hole.

19. The system intended for a snow scooter as claimed in Claim 18, characterised in that for selected holes said centre line is adapted to form a right angle to a plane given to the upper surface of the plate.

20. The system intended for a snow scooter as claimed in Claim 18, characterised in that for selected holes, said centre line is adapted to make an acute angle with the plane given to the upper surface of the plate and with the centre line adapted parallel oriented to said centre plane as well as with the centre line inclining rearwards, in a normal direction of travel.