CN1253652C - Forced air-cooled engine for small motorcycle - Google Patents
Forced air-cooled engine for small motorcycle Download PDFInfo
- Publication number
- CN1253652C CN1253652C CN 03136533 CN03136533A CN1253652C CN 1253652 C CN1253652 C CN 1253652C CN 03136533 CN03136533 CN 03136533 CN 03136533 A CN03136533 A CN 03136533A CN 1253652 C CN1253652 C CN 1253652C
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- temperature
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- cylinder head
- engine
- temperature detector
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- Expired - Fee Related
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
A forced-air-cooled engine for a scooter-type vehicle, includes: a drive sprocket fixed on a crankshaft; a driven sprocket fixed on a camshaft freely rotatably supported on a cylinder head; an endless cam chain wound the drive sprocket and the driven sprocket; and an intake system connected to the cylinder head. The intake system includes a fuel injection valve controlled to inject fuel depending on a value detected by a temperature detector which detects a temperature representing engine temperatures. The temperature detector (35) is mounted within a head cover (29) fixed to the cylinder head (13) so that the detector detects a temperature of an engine oil which is splashed from the cam chain (34) within the head cover (29). Thus, an engine temperature attuned to actual temperature ascending and descending properties of an engine is detected and reflected in fuel injection control.
Description
Technical field
The present invention relates to the forced air-cooling motor that a kind of scooter is used, this motor is being fixed driving sprocket wheel on the bent axle that can rotate freely that is bearing on the crankcase, on the camshaft that can rotate freely on the cylinder head that is arranged in above-mentioned crankcase the place ahead, fixing driven sprocket, between these two sprocket wheels, around the annular cam chain, its suction system is connected on the above-mentioned cylinder head, and this suction system has can be according to the checkout value of the Temperature Detector of the representative temperature of detection of engine, the Fuelinjection nozzle that the injection of fuel is controlled.
Background technique
Up to now, opening the 2000-64928 grade with the open communique spy of Japan Patent is example, is installed on the scooter, and the structure that Fuelinjection nozzle is set in the suction system of forced air-cooling motor is known.
Yet, when the fuel injection amount of control Fuelinjection nozzle, all be to revise fuel injection amount generally according to the temperature of motor in the past, and in this case, be near the temperature of the engine main body the suction system that detects mostly, be reflected in the control gear of fuel injection.
, on the forced air-cooling motor of scooter, because motor not only uses shield encompasses, and around motor, also have the car body lid to be covered with, therefore, when vehicle was parked after travelling, detected engine temperature can be subjected to the influence of ambient air temperature in the car body lid.That is,, can be full of-1-hot gas in the car body lid, therefore have detected temperature and rise owing to the radiation heat that is subjected to from motor, can't consistent such problem with the cooling characteristic of engine temperature.In addition, in the transitional period of engine runnings such as accelerating process, along with the latent heat of vaporization of fuel in the suction system increases hastily, engine temperature needs the time and will reach accurately, thus also have can't be consistent with the temperature-raising characteristic of engine temperature problem.
Summary of the invention
The present invention is exactly the invention of making in view of above situation, its objective is provides a kind of forced air-cooling of scooter motor, it can detect the engine temperature synchronous with the ascending, descending characteristic of motor true temperature, and it is reflected in the fuel injection control system.
For achieving the above object, the forced air-cooling motor that the scooter of first aspect present invention is used, relate to the forced air-cooling motor that a kind of scooter is used, this motor is being fixed driving sprocket wheel on the bent axle that can rotate freely that is bearing on the crankcase, on the camshaft that can rotate freely on the cylinder head that is arranged in above-mentioned crankcase the place ahead, fixing driven sprocket, between these two sprocket wheels, around the annular cam chain, its suction system is connected on the above-mentioned cylinder head, and this suction system has can be according to the checkout value of the Temperature Detector of the representative temperature of detection of engine, the Fuelinjection nozzle that the injection of fuel is controlled, it is characterized in that, the said temperature detector is installed in the above-mentioned valve mechanism cover, can be in being combined in the valve mechanism cover of above-mentioned cylinder head, detect the temperature of the engine lubricating oil that splashes out from above-mentioned cam chain.
According to this structure, Temperature Detector can not only detect the air temperature in the valve mechanism cover, and can also detect the temperature of the engine lubricating oil that splashes out by cam chain, and, the temperature of the engine lubricating oil that splashes out from cam chain and the actual temperature change of motor are synchronous, therefore, in the forced air-cooling motor that is covered with guard shield and car body lid, can get rid of the influence that the encirclement because of guard shield and car body lid causes detected temperatures, also can not be subjected to simultaneously the influence of the latent heat of vaporization of fuel in the suction system, thereby can obtain liter with the true temperature of motor, synchronous motor detected temperatures is fallen, so that control the injection of fuel more accurately.
In addition, a second aspect of the present invention is on the basis of a first aspect of the present invention, add such feature: the said temperature detector is installed in the bottom of cylinder head, and at least one part of said temperature detector be arranged in along with the projection drawing axis normal direction, above-mentioned cam chain of above-mentioned bent axle and camshaft on.According to above-mentioned structure, engine lubricating oil is dispersed to Temperature Detector one side from cam chain, simultaneously, the temperature of the lubricant oil that accumulates in the valve mechanism cover bottom can be detected, thereby the temperature of engine lubricating oil can be more positively detected by means of Temperature Detector.
Also have, a third aspect of the present invention is on the basis of a second aspect of the present invention, adds such feature: the inside below above-mentioned valve mechanism cover forms the store oil part, and the said temperature detector is installed in the bottom of above-mentioned valve mechanism cover, immerses in this store oil part.According to this structure, can be immersed in Temperature Detector in the interior engine lubricating oil of store oil part, detect the temperature of the lubricant oil that comes into one's own more.
Description of drawings
Fig. 1 is the side view of the scooter of first embodiment of the invention;
Fig. 2 is the enlarged side view of drive unit and trailing wheel.
Fig. 3 is the cross-section profile of motor.
Fig. 4 is along the 4-4 line amplification profile diagram among Fig. 3.
Fig. 5 is the sectional view of Fig. 4 corresponding with the 2nd embodiment.
Embodiment
Below, with reference to the embodiments of the invention shown in the accompanying drawing, describe embodiments of the invention in detail.
Fig. 1 to Fig. 4 represents the 1st embodiment of the present invention, and Fig. 1 is the side view of scooter, and Fig. 2 is the enlarged side view of drive unit and trailing wheel, and Fig. 3 is the cross-section profile of motor, and Fig. 4 is the amplification profile diagram along the 4-4 line among Fig. 3.
At first, in Fig. 1, the car body 5 that is useful in scooter of the present invention is to cover the vehicle frame that does not show in 6 coverage diagrams with the car body that synthetic resin is made to constitute, the front-wheel WF that can turn to is bearing in the lower end of the front fork 7 of above-mentioned vehicle frame front end with axle, and the top of front fork 7 is linking steering handle 8.In addition, drive unit P is bearing in the intermediate portion of vehicle frame, can teeter, and trailing wheel WR then is bearing in the rear end of drive unit P with axle.In addition, be provided with the seat 9 of taking usefulness at the rear portion of car body 5.
See also Fig. 2 and Fig. 3, drive unit P is by making cylinder-bore axis roughly be the forced air-cooling motor E of level, and the power that forced air-cooling motor E is exported is constituted with the belt type adjustable speed drive structure M that infinite variable speed mode passes to trailing wheel WR.The variable-speed motor housing 10 of stepless speed changing mechanism M is connected on the crankcase 11 of forced air-cooling motor E, extend towards the rear, and trailing wheel WR is bearing in the rearward end of this speed change casing 10 with axle.
In forced air-cooling motor E, the some of above-mentioned crankcase 11, with the cylinder block 12 that is arranged in crankcase 11 the place aheads and combines with this crankcase 11, and be arranged in cylinder block 12 the place aheads and the cylinder head 13 that combines with this cylinder block 12 all uses guard shield 14 to cover, and be provided with the cooling fin 15 of many protrusions in the cylinder block 12 and the outside of cylinder head 13.
Be engaged in cylinder block 12 in the bent axle 17 that is connected of the pistons 16 that can slide, be bearing in the crankcase 11, energy freely rotate.One end of above-mentioned bent axle 17 is attached at the power input side of above-mentioned stepless speed changing mechanism M.The other end of the bent axle 17 that protrudes from crankcase 11 is then connecting generator 18 and cooling fan 19 simultaneously, and guard shield 14 is provided with intakeport 20 in the part that covers cooling fan 19.In addition, the cooling fan 19 that rotates along with the running of forced air-cooling motor E sucks air outside from intakeport 20, discharges cooling air again in guard shield 14, makes it pass through the side of cylinder block 12 and cylinder head 13.
The suction system 21 of above-mentioned forced air-cooling motor E has: air-strainer 22, connecting tube 23, throttle valve body 25 and sucking pipe 26.Air-strainer 22 is arranged in the top of speed change casing 10 and the side of trailing wheel WR; The upstream extremity of connecting tube 23 is connected with the outlet of air-strainer; Throttle valve body 25 has throttle valve 24 and is connected the downstream of connecting tube 23; Sucking pipe 26 passes guard shield 14, is connected between throttle valve body 25 and cylinder head 13 tops.Fuelinjection nozzle 27 is installed on the sucking pipe 26.In addition, the outlet pipe 28 that is connected the bottom of cylinder head 13 and passes guard shield 14 rearward extends.
The cylinder head 13 of forced air-cooling motor E is connected from the forwards outstanding valve mechanism cover 29 in the front portion of guard shield 14 with a part of, also held the Aspirating valves (not shown) that sucks air in order to control from above-mentioned sucking pipe 26 between valve mechanism cover 29 and the cylinder head 13, and control is to the outlet valve (not shown) of above-mentioned outlet pipe 28 exhausts, the moving device 30 of the valve body that it is not driven.
The moving device 30 of above-mentioned valve body has one and is bearing on the cylinder head 13, the parallel axes of its axis and bent axle 17, and the camshaft 31 that can rotate freely, and be fixed in the driving sprocket wheel 32 on the bent axle 17 and be fixed between the driven sprocket 33 on the above-mentioned camshaft 32 around a ring-type cam chain 34, so that after the rotary driving force of bent axle 17 decelerated to 1/2, pass to above-mentioned camshaft 31.
The fuel injection amount of Fuelinjection nozzle 27 is to control by means of the controller C that is contained on the car body 5, and the action of sort controller C control Fuelinjection nozzle 27 makes it control the emitted dose of fuel according to the temperature of motor.
And, detecting the checkout value of the Temperature Detector 35 of the engine lubricating oil of representing engine temperature imports in the above-mentioned controller C, said temperature detector 35 is installed in the bottom of valve mechanism cover 29, can also detect the temperature of the engine lubricating oil that splashes owing to above-mentioned cam chain 34 in the above-mentioned cylinder head 29.
Among Fig. 4, Temperature Detector 35 comprises: bolt portion 35a, Detecting element 35b, and joint part 35c.Bolt portion 35a is screwed in the screw 36 of valve mechanism cover 29, and Detecting element 35b is inner outstanding from bolt portion 35a's, gives prominence in valve mechanism cover 29, and joint part 35c is near splicing ear 37 ... and be connected the outer end of bolt portion 35a.Metallic flat gasket 38 is screwed in the bottom of valve mechanism cover 29 between the outer surface of Temperature Detector 35 and valve mechanism cover 29.
In addition, Temperature Detector 35 is installed in the bottom of valve mechanism cover 29, and Temperature Detector 35 has at least some to be arranged in the direction of the axis normal of bent axle 17 and camshaft 31, on the projection drawing of above-mentioned cam chain 34.
The 1st embodiment's effect then, is described.At the fuel injection amount of determining according to the temperature of motor, among the controller C that the work of Fuelinjection nozzle 27 is controlled, the checkout value of input temp detector 30.And Temperature Detector 35 is installed on the valve mechanism cover 29, in order to detect the temperature of the engine lubricating oil that is splashed by cam chain 34 in valve mechanism cover 29.
Therefore, Temperature Detector 35 not only detects the air temperature in the valve mechanism cover 29, also detects the temperature of the engine lubricating oil that is splashed by cam chain 34 simultaneously.And, the temperature of the engine lubricating oil that is splashed by cam chain 34 and the true temperature one of motor change, so, in with guard shield 14 and the car body lid 6 forced air-cooling motor E that are surrounded, can get rid of because of the encirclement of guard shield 14 and car body lid 6 to influence that detected temperatures produced, also can not be subjected to simultaneously the influence of carburretion latent heat in the suction system 21, thereby can detect the consistent engine temperature of lifting characteristic with the true temperature of motor, can control the injection of fuel more exactly.
In addition, because Temperature Detector 35 is installed in the bottom of valve mechanism cover 29, and, Temperature Detector 35 has at least some to be arranged in the direction of the axis normal of bent axle 17 and camshaft 31, on the projection drawing of above-mentioned cam chain 34, so engine lubricating oil from cam chain 34 when Temperature Detector 35 1 sides are splashed, can also detect the temperature of the lubricant oil that accumulate in valve mechanism cover 29 bottoms with Temperature Detector 35, thus can be by means of Temperature Detector 35 temperature of detection of engine lubricant oil more accurately.
Fig. 5 is expression the 2nd embodiment of the present invention, inside below valve mechanism cover 29 is protruded one and is made of one with valve mechanism cover, in order to form the projection 29 of store oil part 39, and Temperature Detector 35 just is installed in the bottom of valve mechanism cover 29, is in the store oil part 39.
According to the 2nd embodiment, in the engine lubricating oil that the Detecting element 35b of Temperature Detector 35 is immersed in the store oil part 39, so can detect the temperature of the lubricant oil that comes into one's own more.
More than, though embodiments of the invention have been described, the present invention is not limited to the foregoing description, under the prerequisite of protection scope of the present invention, can carry out various variations to design of the present invention.
For example, above stating among the embodiment, only illustrated that the present invention is applicable to scooter, but the present invention also can be applicable to small-sized motor tricycle.
As mentioned above, according to a first aspect of the present invention, when having got rid of encirclement because of guard shield and car body lid detected temperatures impacted, also can not be subjected to the influence of the latent heat of vaporization of fuel in the suction system, thereby can detect the consistent engine temperature of lifting characteristic with actual engine temperature, so that control the injection of fuel more accurately.
In addition, according to a second aspect of the present invention, make engine lubricating oil from cam chain when Temperature Detector one side is splashed, can also detect the temperature of the lubricant oil that accumulates in the valve mechanism cover bottom with Temperature Detector, thereby can detect the temperature of engine lubricating oil more accurately.
Also have,, Temperature Detector is immersed in the engine lubricating oil in the store oil part, thereby can detect the temperature of the lubricant oil that comes into one's own more according to a third aspect of the present invention.
Claims (3)
1. forced air-cooling motor that scooter is used, this motor is being fixed driving sprocket wheel (32) on the bent axle that can rotate freely (17) that is bearing on the crankcase (11), on the camshaft that can rotate freely (31) on the cylinder head (13) that is arranged in above-mentioned crankcase (11) the place ahead, fixing driven sprocket (33), between these two sprocket wheels, around annular cam chain (34), its suction system (21) is connected on the above-mentioned cylinder head (13), and this suction system (21) has can be according to the checkout value of the Temperature Detector (35) of the representational temperature of detection of engine, the Fuelinjection nozzle (27) that the injection of fuel is controlled, it is characterized in that: said temperature detector (35) is installed in the above-mentioned valve mechanism cover (29), can be in the valve mechanism cover that is combined in above-mentioned cylinder head (13) (29), detect the temperature of the engine lubricating oil that splashes out from above-mentioned cam chain (34).
2. the forced air-cooling motor that scooter as claimed in claim 1 is used, it is characterized in that, said temperature detector (35) is installed in the bottom of cylinder head (29), and at least one part of said temperature detector (35) be arranged in along with the projection drawing axis normal direction, above-mentioned cam chain (34) of above-mentioned bent axle (17) and camshaft (31) on.
3. the forced air-cooling motor that scooter as claimed in claim 2 is used, it is characterized in that, inside in above-mentioned valve mechanism cover (29) below, form store oil part (39), and said temperature detector (35) is installed in the bottom of above-mentioned valve mechanism cover (29), immerses in this store oil part (39).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002148149A JP3686050B2 (en) | 2002-05-22 | 2002-05-22 | Forced air cooling engine for scooter type vehicles |
| JP148149/2002 | 2002-05-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1460776A CN1460776A (en) | 2003-12-10 |
| CN1253652C true CN1253652C (en) | 2006-04-26 |
Family
ID=29706209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03136533 Expired - Fee Related CN1253652C (en) | 2002-05-22 | 2003-05-22 | Forced air-cooled engine for small motorcycle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3686050B2 (en) |
| CN (1) | CN1253652C (en) |
| TW (1) | TWI234607B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5032222B2 (en) * | 2007-07-03 | 2012-09-26 | 本田技研工業株式会社 | Air-cooled engine |
| TWI405899B (en) * | 2011-05-23 | 2013-08-21 | Sanyang Industry Co Ltd | Cleaning device for stepless speed change system |
| JP6360807B2 (en) * | 2015-03-31 | 2018-07-18 | 株式会社クボタ | Air-cooled engine |
| JP6448692B2 (en) * | 2017-03-16 | 2019-01-09 | 本田技研工業株式会社 | On-vehicle structure of air-cooled internal combustion engine |
-
2002
- 2002-05-22 JP JP2002148149A patent/JP3686050B2/en not_active Expired - Fee Related
-
2003
- 2003-04-24 TW TW92109592A patent/TWI234607B/en not_active IP Right Cessation
- 2003-05-22 CN CN 03136533 patent/CN1253652C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1460776A (en) | 2003-12-10 |
| TWI234607B (en) | 2005-06-21 |
| JP2003343309A (en) | 2003-12-03 |
| TW200307784A (en) | 2003-12-16 |
| JP3686050B2 (en) | 2005-08-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060426 Termination date: 20170522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |