CN1532380A

CN1532380A - Internal combustion engine

Info

Publication number: CN1532380A
Application number: CNA2004100300661A
Authority: CN
Inventors: 石坂孝史; 男; 小林英男; 志; 金石贵志
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2003-03-25
Filing date: 2004-03-18
Publication date: 2004-09-29
Anticipated expiration: 2024-03-18
Also published as: CN1302204C; BRPI0400756A; KR100536967B1; TW200424427A; MXPA04002793A; BRPI0400756B1; MY135516A; JP4287683B2; JP2004293348A; KR20040084713A; TWI242065B

Abstract

Provide an internal combustion engine, which provides the detection sensor capable of protecting the operation state of internal combustion engine, can be assembled easily, durable and light in weight, and provides the cover to dissipate the heat of the sensor and the internal combustion engine efficiently. Install the sensor cover 140 capable of protecting the temperature sensor 132 for oil temperature detection in cylinder 74. The sensor cover 140 is composed of the iron bar member 142, the steel plate planar member 144 and the steel plate installation plate 146, and it is kept on the side of the cylinder 74 with the intermediate installation plate 146 and the installation bulge face 170 on the side of the aforementioned cylinder 74.

Description

Internal-combustion engine

Technical field

The present invention relates to be equipped with the internal-combustion engine of the sensor that detects described internal combustion engine operation state in the bottom of the internal-combustion engine of approximate horizontal configuration.

Background technique

In motorcycle (motor bike, the bicycle of band motor) and motor tricycle, various sensors were housed in the past.Can detect gear stage as in gearbox (speed changer), being equipped with, and detect the position transducer (Patent Document 1) of the position of the detected axle that rotates according to the variation of this gear stage.

In this Patent Document 1, disclose to preventing that the breakage that this position transducer is produced by the bump of finger stone etc. is provided with sensor wrap.

In addition, also disclose and to have detected engine temperature, turned back to the structure (Patent Document 2) that the oily return path of food tray or fuel tank is established temperature transducer from cylinder head at oil.

[Patent Document 1] spy opens flat 10-324171 communique ([0011] section)

[Patent Document 2] spy opens 2000-213326 communique (claim)

But, the described temperature transducer of protection is set in not existing fully before internal-combustion engine is not subjected to structure from the cover of the infringement of finger stone etc.In motorcycle and motor tricycle,, adopt internal-combustion engine intactly to be exposed to outside structure in order to bring into play refrigerating function and to seek lightweight.Thereby the temperature transducer that is located in the described oily return path also is exposed on the external, the described temperature transducer of bump such as finger stone when therefore worrying to travel.

Summary of the invention

The present invention proposes in order to address the above problem; its purpose is to provide a kind of internal-combustion engine, and it is equipped with cover, and this cover can be protected the sensor that detects the internal combustion engine operation state; have easy installation and durability and in light weight again simultaneously, and can cool off described sensor and internal-combustion engine expeditiously.

In order to solve described problem; in the internal-combustion engine of first aspect present invention; the sensor that detects described internal combustion engine operation state is equipped with in its bottom at the internal-combustion engine of approximate horizontal configuration; be useful on the sensor wrap of the described sensor of protection, support this sensor wrap with two sidepieces of the cylinder that constitutes internal-combustion engine.

If use this invention; because described sensor is protected by described sensor wrap; simultaneously; two the sidepiece supports of cylinder of described sensor wrap; even the bump by finger stone in travelling etc. applies excessive load to sensor; because whole having applied makes it along the power that fore-and-aft direction rotates on sensor wrap, it becomes buffer function, can avoid the load centralization to the position of bumps such as finger stone.The durability that is sensor wrap improves, and its result can protect sensor.

At this moment, second aspect present invention, the plate-shaped member of L word shape constitutes described sensor wrap with the bar-like member of supporting described plate-shaped member by pointing to the rear from the place ahead of described cylinder and being bent to form roughly, and sensor wrap just has enough durability.In other words, even, also can keep the durability of sensor wrap, so can make the sensor wrap own wt very light because the thickness of plate-shaped member is thinned to a certain degree.

And, even the thickness at each position of plate-shaped member deviation more or less as previously mentioned, because the bar-like member support of this plate-shaped member, is pretended to sensor wrap and can be obtained enough durability.Promptly owing to not necessarily needing to make accurately plate-shaped member, so can make easily and at an easy rate.

Because described plate-shaped member points to the rear from the place ahead of cylinder and is bent to form roughly L word shape, covers the place ahead and the below of cylinder, and side and rear are open.Promptly owing to be capped by the possibility of bumps such as finger stone the highest the place ahead and below, described sensor is protected.And because side and rear are open, the wind that is subjected to owing to travelling and the area of contact of cylinder and sensor become big, can make both obtain good cooling.

In addition, third aspect present invention is preferably in the assembly department that forms this cylinder example between the cold sink that described cylinder sidepiece forms, and makes the shape and the corresponding formation of the shape between described cold sink of at least a portion of the assembly department of described sensor wrap one side.By such formation, because the installation position of described sensor wrap one side can stop the rotation of sensor wrap in being clipped between cold sink.Thereby when cylinder and sensor wrap were used bolt, owing to just block and can finish with any in each side, so can reduce bolt quantity, the operation that the while installs on the internal-combustion engine also became easy.

And, fourth aspect present invention, in order to use described each assembly department of bolt, the fore-and-aft direction that axis is made the described cylinder of approximate vertical that is screwed into described each bolt, simultaneously described respectively be screwed into axis be set at coaxial then since by the load approximate equality of bumps such as finger stone generation be applied on the bolt linking department at cylinder two ends, so can avoid the torsional deformation of bolt, the durability of cylinder is improved.

In addition, fifth aspect present invention is provided with breach at least one end of described plate-shaped member curved part, and the wind that is subjected to owing to travelling is involved at this notch part and flows to sensor wrap inside, directly cooling sensor.And then, even at internal-combustion engine with before enclosing when covering, by this notch part is set, can guarantee the space between sensor wrap and preceding the enclosing, so the wind that is subjected to can fully guarantee to travel the time is mobile, and can utilize this wind cooling sensor and cylinder expeditiously.

The described sensor wrap of sixth aspect present invention is made with metal, can be delivered to sensor wrap one side from the heat of internal-combustion engine, thereby can utilize radiating effect to emit heat from the surface of sensor wrap, well cooling internal combustion engines.

Description of drawings

Fig. 1 is the integrally-built profile of motor bike of explanation one embodiment of the invention;

Fig. 2 is the profile that constitutes the internal-combustion engine of motor bike shown in Figure 1;

Fig. 3 is a front elevation of seeing internal-combustion engine shown in Fig. 2 from the cylinder head side;

Fig. 4 is the exploded perspective view of the annexation of the structure of explanation sensor wrap shown in Figure 3 and this sensor wrap and cylinder;

Fig. 5 is the following figure of plate-shaped member shown in Figure 4;

Fig. 6 is the stereogram of expression with the state of the side maintenance of cylinder sensor wrap shown in Figure 3.

Symbol description

10 motor bikes, 30 internal-combustion engines

58 times cover 74 cylinders

130 oily return path 132 temperature transducers

140 sensor wrap, 142 bar-like members

144 plate-shaped members, 146 mounting plates

154 curved parts, 156 notch parts

160 front ends, 161 cold sinks

170 mounting flanges, 172 screws

Embodiment

Be that example is elaborated to embodiments of the present invention with reference to accompanying drawing below with the motor bike.

Fig. 1 is the integrally-built profile that the motor bike 10 of one embodiment of the invention is used in explanation.Motor bike 10 has the vehicle body frame 12 that forms skeleton, and described vehicle body frame 12 combines side arm 14 and after-frame 16.

Side arm 14 by head pipe 18 and from this head pipe 18 rearward tiltedly the person in charge 20 that extends of lower direction constitute.Supporting exercisable front fork 24 on head pipe 18, it supports rotating front-wheel 22 in the underpart, fixedly sets about axle 26 in the upper end portion of this front fork 24.In the underpart of being responsible for 20, suspention is supported and approximate horizontal configuration air-cooled internal combustion engine 30.To narrate in the back about internal-combustion engine 30.

After-frame 16 is made of rear portion pipe 32 and the seat fine strain of millet 34 that is connected on this rear portion pipe 32.The seat 36 that the occupant sits is set on seat beam 34.

At the rear portion of internal-combustion engine 30, can swingingly support Rocker arm 40 along the vertical direction, in the rearward end of this Rocker arm 40, rotate and freely supporting trailing wheel 42, between Rocker arm 40 and trailing wheel 42, connect posterior bumper 44.

The side that constitutes the person in charge 20 of side arm 14 covers with being responsible for side cover 50.In the both sides dismounting of being responsible for side cover 50 leggings 52 that keeps out the wind that shelves are lived driver leg is installed freely, is being responsible for the front portion configuration front shroud 54 of side cover 50, and then is being responsible for front shroud 56 in the rear portion configuration of being responsible for side cover 50.In addition, cover the following cover 58 (enclosing before being also referred to as) of described internal-combustion engine 30 in the bottom configuration of being responsible for side cover 50, at this moment, the opening portion 60 of the wind when being formed for supplying with described internal-combustion engine 30 in the front portion of covering 58 down and travelling.

At this, internal-combustion engine 30 is described.Internal-combustion engine 30 is made of crankcase 72, cylinder 74, cylinder head 76 and lubrication system (not shown) as shown in Figure 2 basically.

In crankcase 72, contain the bent axle 80 and the oil pump 82 that are supported on the vehicle body left and right directions, in addition, form the food tray (not shown) of store oil in the bottom of crankcase 72.At this moment, food tray also can be a fuel tank.

Inside at cylinder 74 forms cylinder sleeve 90, and in this cylinder sleeve 90, piston 92 is chimeric sliding freely.Piston 92 is connected on the bent axle 80 by connecting rod 94.

Form valve Transmission Room (not shown) in the inside of cylinder head 76, in this valve cage, accommodate valve actuating gear 100.Valve actuating gear 100 is by constituting with lower member, that is: camshaft 102, and its rotation is supported on the cylinder head 76 freely; Air inlet cam and exhaust cam, they and described camshaft 102 form one; The intakeport rocking bar, it is supported on the intakeport rocker shaft and touches with described air inlet cam; The relief opening rocking bar, it is supported on the relief opening rocker shaft and touches with described exhaust cam; Air-breathing valve 104, it is driven by described intakeport rocking bar; Exhaust valve 106, it is driven by described relief opening rocking bar.

On bent axle 80 and camshaft 102, hang the timing chain that does not illustrate among the figure.

Lubrication system by from the described food tray that crankcase 72, forms to the fuel feeding path (not shown) of cylinder head 76 fuel feeding, make oil return the oily return path 130 (with reference to Fig. 3) of described food tray and the described oil pump 82 that is housed in the crankcase 72 constitutes from described cylinder head 76.Oil return path 130 forms in cylinder 74, with the described food tray of connection crankcase 72 and the described valve Transmission Room of cylinder head 76.

In the bottom of cylinder 74, as shown in Figures 2 and 3, configuration temperature transducer 132; it is communicated with oily return path 130; detection simultaneously, is installed the sensor wrap 140 that is used to protect this temperature transducer 132 as the temperature of the oil of a kind of operating condition of internal-combustion engine on cylinder 74.

Sensor wrap 140 as shown in Figure 3 and Figure 4, by iron bar-like member 142, the mounting plate 146 (assembly department) of the plate-shaped member 144 of steel plate system and steel plate system constitutes.

Bar-like member 142 is bent to form in four places of curved part A～D as shown in Figure 4.Engage with described plate-shaped member 144 in the コ font portion 148 that forms with curved part A～C, the bottom of the line part 150 that forms between curved part C, D is round silencing apparatus 152 subsidiary engines such as (with reference to Fig. 3).

At this moment, the layout decision of subsidiary engine classes such as the width of the size of the position of curved part A～D consideration temperature transducer 132 and configuration, cylinder 74 or silencing apparatus 152, but preferably can make along the shape of cylinder 74, just can make the space of cylinder 74 bottoms broader. as far as possible

The described mounting plate 146 of two engaged at end at bar-like member 142.At this moment, preferably utilize welding bar-like member 142, plate-shaped member 144 and mounting plate 146 link together, and intensity is increased.

Plate-shaped member 144 points to rear and crooked from the place ahead of cylinder 74 in curved part 154, form roughly L font.Form notch part 156 (with reference to Fig. 5) in 154 1 ends of described curved part.

Form to insert the patchhole 158 that is used for sensor wrap 140 is remained fixed in the bolt 157 on the cylinder 74 on the mounting plate 146, simultaneously, the shape of mounting plate 146 front ends 160 is with corresponding in the shape of 161 of the cold sinks of the sidepiece formation of cylinder 74.That is, at present embodiment, as from Fig. 2 and shown in Figure 6, owing to the configuration of cold sink 161 almost parallels, so the shape of front end 160 is also corresponding with it, sidepiece becomes the plate-shaped member that almost parallel forms.

As shown in Figure 4, the shape of the corresponding described mounting plate 146 of a part that is located at the cold sink 161 of cylinder 74 sidepieces is cut into breach.At this notch part, be used to install the mounting flange 170,170 (assembly department) and cylinder 74 formation one of described mounting plate 146.The top that described each mounting flange 170,170 is imbedded than described cold sink 161 more forms by the inside of cylinder 74, is screwed into the screw 172 (being screwed into axis) of described bolt 157 in the substantial middle portion formation of described each mounting flange 170,170.At this moment, the fore-and-aft direction of each screw 172,172 phase countercylinder 74 is formed generally perpendicularly, and sets each screw 172,172nd simultaneously, and is coaxial.

Be sensor wrap 140 as,, be installed on the cold sink 161 of cylinder 74 sides by described each mounting plate 146,146 and each mounting flange 170,170 by Fig. 4 and shown in Figure 6.Its result, temperature transducer 132 is configured in the inner space of the plate-shaped member 144 that is formed by curved part 154.The vertical position of plate-shaped member 144 that promptly constitutes sensor wrap 140 is relative with the place ahead of motor bike 10, and the horizontal position of this plate-shaped member 144 is relative with the road surface, and protection temperature transducer 132.The both sides of plate-shaped member 144 are open in addition, allow flow of ambient air.

The motor bike 10 that comprises the internal-combustion engine 30 of present embodiment, basic as above formation, below, its action is described.

Internal-combustion engine 30 begins starting by occupant's start-up function, and the bent axle 80 that is housed in the crankcase 72 rotates.The rotatory force of this bent axle 80 drives oil pump 82 by the transmission of gear (not shown).Its result, by the action of oil pump 82, the oil that draws from described food tray passes through the valve Transmission Room that described oily supply passage is supplied with cylinder head 76, the lubricated each several part that is arranged on the valve actuating gear 100 there.

Lubricate the oil of valve actuating gear 100 each several parts, return the described food tray of crankcase 72 by the oily return path 130 (with reference to Fig. 3) that in cylinder 74, forms.At this moment, the oil temperature in the oily return path 130 is detected by temperature transducer 132.By the temperature of the detected oil temperature of temperature transducer 132, be used for as control from the fuel injection amount of fuel injection valve ejection etc. as internal-combustion engine 30.

Internal-combustion engine 30 is from being subjected to the wind that produces by travelling and being cooled at the opening portions 60 that cover 58 formation down.

In sum, if use present embodiment, because sensor wrap 140 is supported on two sides of cylinder 74, even the bump by the finger stone in travelling applies excessive load to sensor wrap 140, sensor wrap 140 integral body are applied the power of rotating along fore-and-aft direction, this just forms buffering, can avoid the load centralization in impact site such as finger stones.Be sensor wrap 140 low susceptivility to breakage.Its result can protect temperature transducer 132.

At this moment, support that by bar-like member 142 sensor wrap 140 has enough durability, be difficult to breakage by the bump of finger stone in travelling etc. owing to constitute the plate-shaped member 144 of sensor wrap 140.In other words, even because the thickness of plate-shaped member 144 is thinned to the durability that to a certain degree also can keep as sensor wrap 140, so can make sensor wrap 140 own wts lighter.

And, even the thickness at plate-shaped member 144 each position deviation more or less as previously mentioned, because plate-shaped member 144 supported by bar-like member 142, can obtain enough durability as sensor wrap 140.That is, may not make plate-shaped member 144 accurately, so can make easily and at an easy rate.

Because plate-shaped member 144 points to the rear from the place ahead of cylinder 74 and bends to roughly L word shape, thus the place ahead and the below of cylinder 74 covered, and open side and rear.Promptly, can protect temperature transducer 132 because the highest the place ahead and the belows of bump possibility such as finger stone are capped.In addition, because side and rear are open, the wind of accepting by travelling becomes big with the area that cylinder 74 contacts with temperature transducer 132, can cool off this two-part well.

And, as Fig. 4 and shown in Figure 6, because burying underground, 161 of cold sinks that form at two sidepieces of cylinder 74 form mounting flange 170, and make the shape of front end 160 of mounting plate 146 corresponding with the shape of 161 of cold sinks, be clipped in 161 of cold sinks so described front end 160 is positioned at, can stop the rotation of sensor wrap 140.Thereby can cut down the quantity of the bolt 157 of fixing both, simultaneously, sensor wrap 140 also can be easy to toward the installation exercise on the cylinder 74.

As shown in Figure 4, because handle is at each mounting flange 170, what form on 170 is screwed into hole 172,172 direction makes the fore-and-aft direction approximate vertical with cylinder 74, make simultaneously to make and respectively be screwed into hole 172,172 is coaxial, so when bumps such as finger stone, impose on the bolt 157 at cylinder 74 two ends to its load approximate equality.Thereby can avoid the torsional deformation of bolt 157, improve the durability of cylinder 74.

As shown in Figure 4 and Figure 5, owing to form breach 156 in an end of the curved part 154 of plate-shaped member 144, the wind of accepting owing to travelling can be involved in this notch part 156 and flow sensor cover 140 inside, direct chilling temperature sensor 132.And then as shown in Figure 3, even when covering 58 coverings down owing to internal-combustion engine 30 usefulness, by being set, also can guarantee notch part 156 in sensor wrap 140 and following enough spaces of covering between 58, so flowing of the wind of accepting in the time of can guaranteeing to travel utilized this wind efficiently chilling temperature sensor 132 and cylinder 74.

In addition, owing to constitute the bar-like member 142 of sensor wrap 140, plate-shaped member 144 and mounting plate 146 are made of metal entirely, so the heat that internal-combustion engine 30 produces can be delivered to sensor wrap 140 sides.Thereby, can utilize the surface radiating of radiating effect from sensor wrap 140, cooling internal combustion engines 30 well.

The sensor that detects the operating condition of internal-combustion engine 30 is not limited to the temperature transducer 132 of above-mentioned detection oil temperature, for example also comprises cooling-water temperature sensor and knock sensor etc.And described sensor wrap 140 can certainly be protected these sensors with the described temperature transducer 132 of protection the samely.

In addition, described embodiment relates to motor bike, but is not limited thereto, and for example, also can be used for motor tricycle certainly.

If use the present invention, can protect the sensor that detects the internal combustion engine operation state.

Described sensor wrap durability height, in light weight, the operation of installing on the internal-combustion engine is easy, and can efficiently cool off described sensor and internal-combustion engine.

Claims

1. internal-combustion engine; its bottom at the internal-combustion engine of approximate horizontal configuration has the sensor that detects described internal combustion engine operation state; it is characterized in that having the sensor wrap that is used to protect described sensor, keep this sensor wrap with two sidepieces of the cylinder that constitutes internal-combustion engine.

2. internal-combustion engine as claimed in claim 1 is characterized in that, described sensor wrap comprises: plate-shaped member, and its place ahead from described cylinder is pointed to the rear and is bent to form roughly L font; Bar-like member, it supports described plate-shaped member.

3. internal-combustion engine as claimed in claim 2, it is characterized in that, between the cold sink that the sidepiece of this cylinder forms, form the assembly department of described cylinder side, make the shape of at least a portion of assembly department of described sensor wrap one side corresponding with the shape between described cold sink.

4. internal-combustion engine as claimed in claim 3 is characterized in that, for bolt described each assembly department, the axis that is screwed into of described each bolt is made fore-and-aft direction approximate vertical with described cylinder, and simultaneously, the described axis that respectively is screwed into is set at coaxial.

5. as each described internal-combustion engine in the claim 2～4, it is characterized in that, establish notch part at least one end of described plate-shaped member curved part.

6. as each described internal-combustion engine in the claim 1～5, it is characterized in that, form described sensor wrap with metal.