CN1656308A - Propulsion unit set with standard size combustion engine and two-wheeled and three-wheeled motor vehicles with said propulsion units - Google Patents

Propulsion unit set with standard size combustion engine and two-wheeled and three-wheeled motor vehicles with said propulsion units Download PDF

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Publication number
CN1656308A
CN1656308A CN02829470.XA CN02829470A CN1656308A CN 1656308 A CN1656308 A CN 1656308A CN 02829470 A CN02829470 A CN 02829470A CN 1656308 A CN1656308 A CN 1656308A
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China
Prior art keywords
power plant
internal
plant group
combustion engine
cylinder
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CN02829470.XA
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Chinese (zh)
Inventor
I·贝焦
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Aprilia SpA
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Publication of CN1656308A publication Critical patent/CN1656308A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0021—Construction
    • F02F7/0031—Construction kit principle (modular engines)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K7/00—Freight- or passenger-carrying cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00—Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/12—Separate cylinder-crankcase elements coupled together to form a unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Arrangement Of Transmissions (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

Family of power units, each one of which consists essentially of an internal-combustion engine (100, 200) comprising one or two cylinders (112), the related head (130) with two shafts of the cams (133, 137) and an upper cover (140), and furthermore of an associated speed-variation (300, 500) and/or power transmission (400), wherein all engines (100, 200) in said family of power units share the same ratios of a number of characteristic dimensions to each other. The units can be applied for the propulsion of two-wheel or three-wheel vehicles.

Description

Have the power plant group of standard measure internal-combustion engine and the two-wheeled and the three-wheeled motor vehicle of described power plant are installed
Technical field
The present invention relates to a kind of power plant group, its in fact by be used for two-wheeled and three-wheeled motor vehicle internal-combustion engine and the transmission device that is associated and/or gear form.
Background technique
For a long time, each company of mass production internal-combustion engine, now all considering that using general purpose accessory and/or standardized structural system to produce internal-combustion engine with sub-assembly system has different power and capacity rating internal-combustion engine, for example referring to patent publication us GB-A-2344378 and EP-A-597263.Especially, be conceived to a back patent of the application of internal-combustion engine on pedal-type scooter and middle low-power Motor Vehicle, a plurality of " substantially " internal-combustion engines that we often say, just single-cylinder engine is associated in together.Specific practice is that one or more assembly that forms complementary parts inserts in its cylinder block, can obtain " deriving " internal-combustion engine that we often say, multi-cylinder internal-combustion engine just, this internal-combustion engine also can have multiple structure (array or cylinder in V-arrangement are arranged or the like) and have higher rated power.It is as a whole that but these documents do not go consideration that these power plant are looked too much, just will be closely linked the type of the purposes of Motor Vehicle and Motor Vehicle.
The present invention has not only solved above-mentioned problem, also at manufacturer and user and be used in two-wheeled and three-wheeled motor vehicle on the different needs of various power plant consider.
About this point, we are example with the pedal-type scooter, not only are subjected to liking widely and accepting because of this car, also make it be convenient to drive because the power plant of this car have stepless speed variator.Their manufacturer must consider several requirements, possibility such as the internal-combustion engine that adopts different capacity and capacity rating, adopt the wheel (for example wheel of 13 inches and 16 inches) of different-diameter and under any circumstance for the driver provides enough big pedal, its both feet of confession are placed on top rest.
On the other hand, the user of so-called " standard " motorcycle usually need be than the performance requirements at the higher level that pedal-type scooter allowed, and accept the driving style of requirements at the higher level, so multi-speed transmission commonly used replaces stepless speed variator in their power plant.Thereby, produce various two-wheeleds and/or three-wheeled motor vehicle company and all must can be applicable to multiple power plant.Final result causes long development time of product, the material on lower scale and benefit and the understandable production line and the complexity of part management.
Summary of the invention
Main purpose of the present invention just provides a kind of power plant group, satisfy as much as possible two-wheeled and three-wheeled motor vehicle manufacturer and user about want modish on the style and performance on will the highest requirement.
The present invention is made of a power plant group, this device group have a plurality of in the internal-combustion engine of low piston swept volume (being no more than 250 cubic centimetres), it is used for two-wheeled and three-wheeled motor vehicle in fact, it is characterized in that high standardization and Componentized structure as narrating and define in the appended claims.
Description of drawings
Done a large amount of R﹠D works the claimant, the optimal parameter that draws used internal-combustion engine in this power plant group will be determined by relevant cylinder cap size.For above-mentioned purpose of the present invention is realized together with other purposes, will carry out the non-restrictive example explanation to the present invention with reference to following accompanying drawing, can more clearly understand the present invention like this, wherein:
Fig. 1 is the side view that is used for pedal-type scooter power plant group, and the four-cycle, single-cylinder internal-combustion engine that it comprises playscript with stage directions invention is combined with a stepless speed variator, and the latter only schematically draws;
Fig. 2 is the phantom of same power plant, therefrom the many concrete structure detail of above-mentioned stepless speed variator as can be seen;
Fig. 3 is the sectional view of the cylinder head of same internal-combustion engine along A-A straight line among Fig. 1;
Fig. 4 is the sectional view of same cylinder cap along X-X line among Fig. 3;
Fig. 5 is that the rear portion of same stepless speed variator is promptly along the phantom of B-B line among Fig. 2;
Fig. 6 is the phantom of the rear portion of same stepless speed variator along C-C line among Fig. 2;
Fig. 7 is the side view that is used for the power plant of motorcycle, it comprises a single cylinder internal combustion engine shown in the prior figures, with a multi-speed transmission, but the speed changer of Discrete Change just, because this speed changer comes down to adopt well-known conventional construction, so only schematically draw in the drawings;
Fig. 8 is the side view that is used for the power plant of motorcycle, and it comprises twin cylinder quartastroke engine that a V-type is arranged and many grades of discontinuous speed changers that combine with internal-combustion engine, and this speed changer is owing to the reason described in Fig. 7 is only schematically drawn.
Embodiment
Should be noted that the cause in order to simplify, the component of a lot of conventional constructions are shown in the drawings not to be described in this article yet even have.Because these traditional component all are known in those skilled in the art, and do not have actual association with the present invention.
In view of related among the present invention all be four kinds of journey internal-combustion engines of crest places the cam shaft type (get initial usually and be abbreviated as DOHC), so Fig. 1, power plant described in 2 and 7 adopt the single-cylinder engine of representing with label 100 generally, and power plant described in Fig. 8 adopt the V-type of representing with label 200 generally to arrange double cylinder IC engine.Mentioned above as specification, here each cylinder of all internal-combustion engines of being considered all unify for be no more than 250 cubic centimetres in low piston displacement.
Power plant shown in Fig. 1 and 2 comprise a stepless speed variator, mark with label 300 generally, and will be with reference to figure 5 and 6 pairs of explanations of making its more detailed joint.Power plant among Fig. 7 comprise many grades of discontinuous speed changers of a first kind (multi-speed discretely-variabletransmission), mark with label 400 generally, power plant among Fig. 8 comprise many grades of discontinuous speed changers of one second class, mark with label 500 generally.The single-cylinder engine 100 in conjunction with step change transmission 500 (discretely-variable transmission) has been contained in the present invention, perhaps be combined with the double cylinder IC engine 200 of stepless speed variator 300, or be combined with the double cylinder IC engine 200 of step change transmission 400.
As seen from Figure 2, internal-combustion engine 100 comprises the single cylinder 112 of a cylinder block 110 and the piston 114 that is associated, and bent axle 116 comes driven plunger by connecting rod 118.Stepless speed variator 300 (will be described in more detail it with reference to figure 5 and 6 specially) is placed in the housing 301, and this housing is equipped with a dismountable cap 302.This stepless speed variator also comprises: the drive pulley 304 of a front side; One driven pulley 310; One gearbox 320; The axle 330 of back side drive wheel; The drivign belt 308 that links respectively with belt pulley 304 and 310.Also drawn among Fig. 1 and 2 and encircled 330, its axis P 2Mark, when power plant were installed on the pedal-type scooter, this ring was used for rear side decoupling rod (not shown) is connected to power plant.
The bent axle 116 of internal-combustion engine 100, its spin axis marks with Z in Fig. 4, is connected in reliably on the d-axis 120, in order to support the drive pulley 304 of stepless speed variator 300.The spin axis of d-axis is used P on Fig. 2 0Mark.Scheme as an alternative, this axle 120 also can be that bent axle 116 directly extends to cylinder block 110 outsides and forms, therefore described axis Z and P 0Also can overlap.
As Fig. 1 illustrates rightly, according in the general mentality of designing in pedal-type scooter field, the X-axis of cylinder 112 and the axis P that comprises drive pulley 304 0Axis P with driven pulley 310 1The plane form a very little angle, this angle is typically about 10 to 20 degree.Straight line Y line among Fig. 1 is represented the intersection line of above-mentioned plane and paper plane.
Part noted earlier and other parts and some auxiliary components, only in Fig. 2, draw (for example the starter of internal-combustion engine, Carburetor, cooling waterpump or the like).But because the said reason in front does not just elaborate.Internal-combustion engine 100 comprises a cylinder cap 130 and is used to seal dismountable lid 140 on cylinder cap 130 tops, can see major characters more of the present invention from this cylinder cap.
As Fig. 3 appropriately illustrated, four stud bolts of these cylinder cap 130 usefulness were fixed on the cylinder 112, and corresponding bolt hole is respectively 131,142,143,144.As shown in Figure 2, other bolt 151,152,153 is used to lid 140 is fastened on the cylinder cap 130.
Cylinder cap 130 (wherein is equipped with intake manifold 132 and gas exhaust manifold 136 along the runner of lubricant oil and cooling water in a known manner, and spark plug adapter 139, only show spark plug adapter among Fig. 3, not shown spark plug) constituted the shell of internal-combustion engine 100 whole timing systems.The front was mentioned, this timing system is the DOHC type, except that other component, it comprises: drive first of two Aspirating valvess 131 (for simplicity by pairing cam 133 and spring 134, do not draw), with second (not shown) that drives two outlet valves 135 by corresponding cam 137 and spring 138, second axis of above-mentioned diaxon is parallel to each other, referring to Fig. 3 and 4.
According to a major character of the present invention, the size characteristic of cylinder cap and timing system is not only to all power plant groups of the present invention, in just whole air displacement and the rated power scope is identical, and to comprise at present illustrated single-cylinder engine 100 with following will also be identical with particular reference to the double cylinder IC engine 200 of Fig. 8 explanation.Especially these sizes all are identical in gamut below Fig. 3 can see too clearly in 4:
● the lower plane 117 of the height A of cylinder cap 130 from having a common boundary with cylinder 112, terminate in and cover the last planes 119 of 140 boundaries,
● the centre distance B between each axis of above-mentioned camshaft,
● the tilt angle C of Aspirating valves 131, and
● outlet valve 135 is with respect to the tilt angle D of the axis of spark plug;
● the centre distance N between the intake valve 131
● the centre distance R between the exhaust valve 135, this centre distance interface 117 between cylinder cap 130 and cylinder 112 is measured.
In addition, suppose:
● S represents the distance between the spin axis Z of bent axle 116 and cylinder cap 130 and lid 140 interfaces 119 (among Fig. 4 and comprise the planes overlapping of axis of the diaxon of cam 133 and 137),
● L represents horizontal centre distance, and
● M represents to be used for cylinder cap 130 is fastened on vertical centre distance between four bolts on the cylinder 112,
So, have unified piston swept volume (just being about 250 cubic centimetres at most), be the same each other according to the mutual ratio of above-mentioned size of the present invention, and in the power plant group, be constant for internal-combustion engine in the power plant group of claimant exploitation.When particularly described ratio is selected in one can become scope, all the more so, this variable range will define by following minimum value and maximum value:
Table 1
The size ratio Minimum Maximum
????A/S ????0.25 ????0.30
????A/B ????1.05 ????1.30
????B/L ????0.9 ????1.05
????B/M ????0.9 ????1.1
????B/N ????2.5 ????3.3
????B/R ????2.5 ????3.2
According to the present invention, when the value of the value of the tilt angle C of Aspirating valves 131 and the tilt angle D of outlet valve 135 was chosen in the variable range that following minimum value and maximum value define, preferably they were identical in this power plant group:
Table 2
Angle value Minimum Maximum
????C ????13° ????17°
????D ????16° ????20°
Can be clear that the manufacturer depends on identical unified value, the especially Yi Xia benefit of above-mentioned linear dimension and Angular Dimension in the whole power plant group in the resulting benefit of this point,
● novel two-wheeled of simplification/shortening and three-wheeled motor vehicle come into the market the needed time,
● reduce the quantity of parts and the quantity of correlated parts, control and management be the amount of parts the during stage in factory and after sales service.
In fact, single-cylinder engine is that the latter comprises many grades of step change transmissions 400 as shown in Figure 7 as parts in the power plant.Double cylinder IC engine 200 is as parts of power plant, and the latter comprises as shown in Figure 8 on relevant linear dimension and Angular Dimension all identical feature.
In an excellent embodiment of the present invention, stepless speed variator 300 is by retaining ring 330, by axis P 2The position of determining is connected on the rear suspension of vehicle this axis P 2Be in the axis P of driven pulley 310 1Position after leaning on, as clearly shown in Figure 1, this speed changer 300 also has the clear feature that illustrates in Fig. 5 and 6.
The driven pulley 310 of speed changer 300 shown in Figure 5 and belt 308.This driven pulley is put between housing 301 and the detachable cover 302, and forms by the first idling part 312 with second part 314 that axle 316 rotates.This 316 also is mounted with the actuation gear (not shown) of gearbox 320 and along aforesaid axis P 1Extend.According to another feature of the present invention, the axle of driven pulley 310 316 is provided with three supporting elements, that is to say than traditional stepless speed variator to Duo a supporting element.Wherein two such supporting elements (for the sake of simplicity, only drawn among the figure one, as among the figure 315) remain on the appropriate location by housing 310 in a conventional manner, the 3rd to support 318 be that bearing by free end 317 places that are in axle 316 constitutes (opposite side of the gearbox that links with the same axis just).The 3rd supporting element 318 utilizes the lining 319 that another feature of the present invention made by plastics or selectively remains on correct position by a spring shackle by covering 302.
Structure disclosed in above-mentioned stepless speed variator 300 and conventional construction, particularly US-A-4475893 and the US-A-4567958 is made comparisons, and has the following advantages:
-because the minimizing of part, the overall structure of stepless speed variator 300 becomes simply, is not only to be used for enclosing housing 301 in the present invention because cover 302, but also has played tectonism.
-in order to change belt 308, lid 302 needs regular dismounting, uses plastic bushing 319 or spring shackle can make that the fit up gap is compensated effectively.
The resiliently deformable of-plastic bushing 319 (or aforesaid spring shackle) also helps suppressing the vibration of whole power plant.
Another feature of the present invention relates to the cooling of drive pulley 304 of the stepless speed variator 300 of pivotable drive belt 308.This drive pulley 304 comprise 306, one of a so-called movable disk can on axle 120, sliding be fixed on so-called retaining ring 307 on the same axis (said as the specification front, at axis P 0Under the situation about overlapping with axis Z, this ring also can be omitted or directly be replaced by the cantilever extension of bent axle 116).As shown in Figure 6, housing 301 preferably is provided with a dismountable cap 305, this has the cap than macropore 325 just in time to be positioned at fixedly wheel disc 307 fronts, and the fixing exterior edge face 309 of wheel disc 307, just, be configured as a centrifugal cutter facing to that face of internal-combustion engine opposition side in the power plant.Around the belt pulley 304 and the place ahead, just towards placing the relative side of a side with belt 308, thereby housing 301 is with the runner 303 of a cooling air of a kind of like this method sealing portion's formation within it, and this runner is fully around belt pulley 304, as arrow F among Fig. 6 1To F 6Shown in, and the while is at the place ahead and the rear extension of belt 308.Like this, belt 308 has long working life simultaneously with than the low degree pressurized, has improved the global reliability of power plant.
See the requirement of having satisfied manufacturer and user according to power plant group of the present invention really from the above description easily, and owing to integrally-built improvement has improved global reliability.
Though above-mentioned description references a preferred embodiment of the present invention, under the situation that does not depart from the claims scope, the present invention can also comprise other embodiment and modification.

Claims (15)

1, a kind of power plant group, wherein each power plant is all in fact by an internal-combustion engine (100,200) and corresponding speed change gear and/or power transmitting deice constitute, this internal-combustion engine comprises: one or two cylinder (112), have two camshafts of cam (133,137) and the cylinder cap (130) of a loam cake (140), wherein, all internal-combustion engines (100,200) all have the same ratio of following size each other in the described power plant group:
-A/S, wherein A is the height of cylinder cap (130), its measurement is from the plane (117) that cylinder (112) has a common boundary, and upwards to the plane (119) that loam cake (140) has a common boundary, S represents that the spin axis of bent axle (116) is to the distance described and plane (119) that loam cake (140) has a common boundary;
-A/B, wherein A is the height of described cylinder cap (130), B is the centre distance between the axis of cam (133,137);
-B/N, wherein B is a centre distance between the axis of described camshaft, and N is the centre distance between intake valve (131), and this centre distance interface (117) between cylinder cap (130) and cylinder (112) is measured;
-B/R, wherein B is the centre distance between the axis of described camshaft, R is the centre distance between exhaust valve (135), also is to measure at described interface (117).
2, power plant group as claimed in claim 1 is characterized in that, described dimension scale value is selected in following scope: A/S from 0.25 to 0.30; A/B from 1.05 to 1.30; B/N from 2.5 to 3.3; B/R from 2.4 to 3.3.
3, power plant group as claimed in claim 1 or 2 is characterized in that, all internal-combustion engines (100,200) all have identical intake valve (131) tilt angle C and exhaust valve (135) tilt angle D.
4, power plant group as claimed in claim 3 is characterized in that, the value at the tilt angle of described valve is being selected in the excursion down: C is from 13 ° to 17 °, and D is from 16 ° to 20 °.
5, as the described power plant group of the arbitrary claim in front, it is characterized in that, all internal-combustion engines (100,200) all have identical ratio B/M, wherein B remains the centre distance B between the camshaft, and M is used for cylinder cap (130) is fastened on centre distance between the fixing device on the cylinder (112).
6, as the described power plant group of the arbitrary claim in front, it is characterized in that, comprise the double cylinder IC engine (200) of V-shaped layout.
As described in the arbitrary claim in front and be used in power plant group on two-wheeled or the three-wheeled motor vehicle, it is characterized in that 7, pack into the stepless speed variator (300) of housing (301) of internal-combustion engine (100) and combines.
8, power plant group as claimed in claim 7 is characterized in that, when internal-combustion engine (100) when being single-cylinder engine, and the axis P of the drive pulley (304) of stepless speed variator (300) 0Parallel or even coincide with the spin axis Z of bent axle (116) and the axis P of described drive pulley (304) 0And the axis P of driven pulley (310) 1The plane that constitutes and the axis X of internal-combustion engine (100) form one 10 ° to 20 ° angle.
9, as claim 7 or 8 described power plant groups, it is characterized in that, the axle (316) of driven pulley (310) is provided with one the 3rd supporting element (318) in its end portion, and described the 3rd supporting element (318) places the opposite side of the gearbox (320) that is associated with described axle (316).
10, power plant group as claimed in claim 7, it is characterized in that the correct position of the detachable cover (302) that lining (319) that the 3rd supporting element (318) of described driven pulley (310) axle (316) is made by plastics or spring shackle remain on housing (301).
11, as each described power plant group in the claim 7 to 10, it is characterized in that, in housing (301), be provided with the runner (303) of cooling air, this runner begins from the hole same housing (325), extend in the front and back of the belt (308) of stepless speed variator (300) simultaneously, this hole is preferably located on the preferential detachable cover (305) of front of drive pulley (304).
12, power plant group as claimed in claim 11 is characterized in that, the end face (309) of dish (307) of drive pulley (304) of back that is positioned at described mouthful (325) of described housing (301) is arranged to a centrifugal cutter.
13, as in the claim 1 to 6 as described in each and be used in power plant group on two-wheeled or the three-wheeled motor vehicle, it is characterized in that internal-combustion engine (100) and many grades of step change transmissions (400,500) link.
14, having and be no more than about 250 cubic centimetres of unified piston swept volume, also is the internal-combustion engine (100,200) of the parts of power plant group described in the claim 1 to 13 simultaneously.
15, use the two-wheeled or the three-wheeled motor vehicle of the power plant in the described power plant group of claim 1 to 13.
CN02829470.XA 2002-08-20 2002-08-20 Propulsion unit set with standard size combustion engine and two-wheeled and three-wheeled motor vehicles with said propulsion units Pending CN1656308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2002/000544 WO2004018861A1 (en) 2002-08-20 2002-08-20 Family of power units comprising internal combuston engines of standardized dimensions and 2- and 3-wheeled vehicles equipped with said units

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CN1656308A true CN1656308A (en) 2005-08-17

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EP (1) EP1546537A1 (en)
CN (1) CN1656308A (en)
AU (1) AU2002334399A1 (en)
WO (1) WO2004018861A1 (en)

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EP1546537A1 (en) 2005-06-29
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