CN1229879A - Parallel double-cylinder engine - Google Patents

Parallel double-cylinder engine Download PDF

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Publication number
CN1229879A
CN1229879A CN99104125A CN99104125A CN1229879A CN 1229879 A CN1229879 A CN 1229879A CN 99104125 A CN99104125 A CN 99104125A CN 99104125 A CN99104125 A CN 99104125A CN 1229879 A CN1229879 A CN 1229879A
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CN
China
Prior art keywords
cylinder
crankcase
thorax
pair
engine
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Granted
Application number
CN99104125A
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Chinese (zh)
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CN1143956C (en
Inventor
衣袋秀男
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Publication of CN1229879A publication Critical patent/CN1229879A/en
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Publication of CN1143956C publication Critical patent/CN1143956C/en
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Expired - Fee Related legal-status Critical Current

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    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention is to reduce a dimension of a juxtaposed two-cylinder engine in the axial of an engine crankshaft by reducing a space between a pair of cylinder bores of the engine as much as possible. A juxtaposed two-cylinder engine E has a crank case 2 composed of a crank case left half 3L and a crank case right half 3R which are divided by a division place P1 , and a cylinder block 4 having a pair of cylinder bores 15L and 15R. The division plane P1 is deviated from a middle plane C of the pair of cylinder bores 15L and 15R in a right direction by a distance D. A bolt 49<3> placed on the middle plane C to connect the cylinder block 4 to the crank case 2 is screwed into the crank case left half 3L without interference with the division plane (P1). Accordingly, a dimension of the engine E in the direction of an axis L is reduced by bringing the pair of cylinder bores 15L and 15R closer together.

Description

Parallel double-cylinder engine
The present invention relates to parallel double-cylinder engine, this parallel double-cylinder engine has along the crankshaft center line direction and is divided into two-part crankcase and has the cylinder block of thorax in a pair of cylinder, with several bolts that are parallel to thorax in this cylinder cylinder block is combined on the crankcase.
This parallel double-cylinder engine for example uses as the power unit of motor bike.Usually, this kind parallel double-cylinder engine, be divided into the parting plane of two-part crankcase left-half and crankcase right half part, with the median surface of thorax in a pair of cylinder that is formed on the cylinder block (axis of thorax is equidistant face in two cylinders) at grade.
In the above-mentioned motor, with bolt cylinder block is combined on the crankcase, if when this bolt being configured on the median surface of thorax in two cylinders, the parting plane of the left-half of this bolt and crankcase and crankcase right half part disturbs and can not be screwed into by spiral.For this reason, in the prior art, above-mentioned bolt be configured in respectively above-mentioned median surface about, with the interference of the parting plane that prevents these bolts and crankcase left-half and crankcase right half part.
But, when bolt is configured in the left and right sides of thorax median surface in a pair of cylinder respectively, this guarantee the configuration space of bolt, the interval of thorax must enlarge in a pair of cylinder, thereby causes the maximization of size of engine.
The present invention makes in view of the above problems, and its purpose is to make the interval of thorax in a pair of cylinder of parallel double-cylinder as much as possible little, makes the crankshaft axial direction compact in size of motor.
To achieve these goals, the parallel double-cylinder engine of claim 1 record, have along the axial direction of bent axle and be divided into the crankcase of 2 parts and have a cylinder block of thorax in a pair of cylinder, cylinder block is combined on the crankcase with several bolts of the interior thorax of parallel this cylinder; It is characterized in that the parting plane of crankcase is with respect to the median surface of thorax in a pair of cylinder, towards side's bias of the axial direction of bent axle, simultaneously, among above-mentioned several bolts,, avoid above-mentioned parting plane ground spiral and be screwed into crankcase near the bolt the median surface that is configured in thorax in the above-mentioned cylinder.
According to above-mentioned structure, because the parting plane of crankcase is with respect to the median surface of thorax in a pair of cylinder axial direction one side's bias towards bent axle, so, when being combined in cylinder block on the crankcase with bolt, be configured near the bolt the thorax median surface in a pair of cylinder, do not disturb, but spiral is screwed into crankcase with above-mentioned parting plane.Like this, do not increase number of bolts, not only produce uniform fastening force, and, make the interior thorax of a pair of cylinder approaching, can make the axial direction compact in size of motor, simultaneously, reduce the area of the junction plane of crankcase and cylinder block, improve sealing.
The parallel double-cylinder engine of claim 2 record is in the parallel double-cylinder engine of claim 1 record, it is characterized in that the outside of thorax has a pair of axle journal in a pair of cylinder, and above-mentioned crankshaft support is on the crankcase that a pair of axle journal separates this.
According to this structure and since bent axle by a pair of journal rest that is located at the outside of thorax in a pair of cylinder on crankcase, so, can cancel the axle journal of bent axle central authorities, make in a pair of cylinder thorax approaching as far as possible, realize the miniaturization of motor more.
The parallel double-cylinder engine of claim 3 record, be in the parallel double-cylinder engine of claim 1 record, it is characterized in that, the driving force of bent axle is passed to the driving mechanism that is located at the camshaft on the cylinder head, be configured in a side the end of the above-mentioned axial direction of crankcase and cylinder block.
According to this structure, owing to needn't be configured in the cam drive mechanism that transmits crank-driven power to camshaft the neutral position of thorax in a pair of cylinder, so, can make the interior thorax of two cylinders approaching as far as possible, realize the miniaturization of motor more.And, because cam drive mechanism is configured in a square end portion of the above-mentioned axial direction of crankcase and cylinder block, so, make above-mentioned parting plane be divided into 2 parts crankcase about the size equalization of half part, easy to manufacture.
Fig. 1 is the profile diagram of parallel double-cylinder engine.
Fig. 2 is a 2-2 line sectional view among Fig. 1.
Fig. 3 is a 3-3 line sectional view among Fig. 1.
Below, with reference to illustrated embodiment example of the present invention is described.
Fig. 1 to Fig. 3 represents one embodiment of the invention.Fig. 1 is the profile diagram of parallel double-cylinder engine.Fig. 2 is a 2-2 line sectional view among Fig. 1.Fig. 3 is a 3-3 line sectional view among Fig. 1.
Motorcycle-use parallel double-cylinder engine E shown in Figure 1 does not show on the vehicle body at figure with the state lift-launch that bent axle 1 disposes to left and right direction.The crankcase 2 of motor E is by being divided into two-part along bent axle 1 axis L direction and constituting at the 1st parting plane P1 conjugate crankcase left-half 3L and crankcase right half part 3R.Cross on the 2nd parting plane P2 of crankcase left-half 3L and crankcase right half part 3R, in conjunction with towards the cylinder block 4 of vehicle body front upper place inclination, at this above cylinder block 4, in conjunction with cylinder head 5 gentle cylinder head covers 6.
Bent axle 1 has pairing left and right axle journal 7L, 7R and is positioned at pairing left and right pin 8L, the 8R of these axle journals 7L, 7R inboard, the axle journal 7L in left side is by supporting at the 9L of journal rest portion that is located on the crankcase left-half 3L, and the axle journal 7R on right side is by supporting at the 9R of journal rest portion that is located on the crankcase right half part 3R.The generator 10 that is located at bent axle 1 left end is covered by generating hood 12, and these generating hood 12 usefulness bolts 11 are fixed on the crankcase left-half 3L.Clutch cover 14 usefulness bolts 13 are fixed on the crankcase right half part 3R, are accommodating rising of scheming not show in the inside of this clutch device cover 14 and are employing clutch.
Pairing left and right cylinder interior thorax 15L, 15R also are located at cylinder block 4 inside, are entrenched in piston 16L, 16R in thorax 15L, the 15R in each cylinder slidably, are connected with pin 8L, the 8R of bent axle 1 by connecting rod 17L, 17R respectively.At the right-hand member of bent axle 1, fixing the rotor 22 that driving force is passed to input gear 19, balace weight axle actuation gear 20, the camshaft actuated sprocket wheel 21 of gearbox 18 and be used to detect bent axle 1 phase place.The peripheral part of this rotor 22 and the electromagnetic sensor 23 that is fixed on clutch cover 14 inner faces are in opposite directions.
With reference to Fig. 2, be formed on the camshaft supporting portion 5 on the cylinder head 5 in the lump 1, 5 1, 5 2, 5 2, 5 3, 5 3With usefulness bolt 41 ... be combined between the camshaft holder 42 on the cylinder head 5, supporting rotatable air inlet cam axle 43i and exhaust cam shaft 43o.The right-hand member of air inlet cam axle 43i and exhaust cam shaft 43o is being provided with camshaft driven sprocket 44i, 44o respectively, this driven sprocket 44i, 44o are connected with cam drive sprocket wheel 21 by endless chain 45, and this endless chain 45 is housed in the endless chain chamber 40 of up/down perforation crankcase 2, cylinder block 4 and cylinder head 5.Endless chain 45 constitutes cam drive mechanism of the present invention.The number of teeth of camshaft driven sprocket 44i, 44o is 2 times of the number of teeth of cam drive sprocket wheel 21, and therefore, bent axle 1 every rotation 2 is changeed, and air inlet cam axle 43i and exhaust cam shaft 43o go around respectively.
On air inlet cam axle 43i, be provided with 4 air inlet cam 46i ..., these 4 air inlet cam 46i ... with 2 Aspirating valves 47i that are provided with on each cylinder ... plunger end join.On exhaust cam 43o, be provided with 4 exhaust cam 46o ..., 2 outlet valve 47o that are provided with on these 4 exhaust cam 46o and each cylinder ... plunger end join.
In the lump with reference to Fig. 3, at the 1st parting plane P1 conjugate crankcase left-half 3L and crankcase right half part 3R, with several bolts 48 ... be fixed as one these several bolts 48 ... inserting also from crankcase left-half 3L side, spiral is screwed in the right halfbody 3R of crankcase.These several bolts 48 ... in 1 shown in Figure 1,2 shown in Figure 3.
Be combined in the cylinder block 4 on crankcase 2 the 2nd parting plane P2, with 8 bolts 49 1～49 8Be fixed together with cylinder head 5.Above-mentioned 8 bolts 49 1～49 8In 2 bolts 49 7, 49 8Connect the right part of cylinder head 5 and cylinder block 4 from top to bottom, spiral is screwed into the 2nd parting plane P2 of crankcase right half part 3R.Other 6 bolts 49 1～49 6Be that spiral is screwed into the stud bolt of the 2nd parting plane P2 of crankcase 2, cylinder block 4 chimeric with it and cylinder head 5 tegmentum shape nuts 50 in advance ... fastening from the top.At this moment, 2 bolts 49 3, 49 4The axle collar 51,51 that is connected is entrenched in crankcase 2 and cylinder block 4 on both, like this, but the mutual location of March axle box 2 and cylinder block 4.In addition, in order to pass through cylinder block 4 to cylinder head 5 supplying lubricating oils, at 1 bolt 49 from crankcase 2 6Periphery and the 2nd parting plane P2 of crankcase 2 go up and form oil circuit 52,53,54.
From Fig. 1 and Fig. 3 as seen, the median surface C of thorax 15L, 15R in a pair of cylinder (the equidistant face of axis of thorax 15L, 15R in a pair of cylinder), with respect to the 1st parting plane P2 of crankcase left-half 3L and crankcase right half part 3R, towards left to the bias distance D.In other words, the 1st parting plane P1 of crankcase left-half 3L and crankcase right half part 3R, with respect to the median surface C of thorax 15L, 15R in two cylinders towards right bias distance D.Therefore, cylinder block 4 is attached to 8 bolts 49 on the crankcase 2 1～49 8Among, be configured in 2 bolts 49 on the median surface C of thorax 15L, 15R in two cylinders 3, 49 4, do not disturb, but spiral is screwed among the crankcase left-half 3L with the 1st parting plane P1.
If the 1st parting plane P1 of the median surface C of thorax 15L, 15R and crankcase left-half 3L and crankcase right half part 3R at grade in two cylinders, then because can not be with bolt 49 with the 1st parting plane P1 interference 3, 49 4Be configured on the above-mentioned median surface C.Therefore, the left side of the median surface C of thorax 15L, 15R and right side must dispose each 2 bolt in two cylinders, the result, not only increased required number of bolts, and in order to ensure the configuration space of these bolts, must enlarge the interval of thorax 15L, 15R in two cylinders, thereby the size of the axis L direction of motor E is maximized.
But according to present embodiment, owing to make the median surface C of thorax 15L, 15R in two cylinders and the 1st parting plane P1 bias of crankcase left-half 3L and right half part 3R, with 2 bolts 49 3, 49 4Be configured on the above-mentioned median surface C, can not only make the fastening force of equalization about near the 2nd parting plane P2 thorax 15L, the 15R upward produces in two cylinders, and the interval of thorax 15L, 15R in two cylinders is reduced, make the compact in size of the axis L direction of motor E.In addition, because the compact in size of the axis L direction of motor E, above-mentioned the 2nd parting plane P2 also reduces, so guarantee the sealing of the 2nd parting plane P2 easily.
In addition, because bent axle 1 is bearing on the crankcase 2 by a pair of axle journal 7L, the 7R that are located at its two ends, so, can cancel the journal rest portion of axle journal and this axle journal of supporting of bent axle 1 central authorities, like this, the interval of thorax 15L, 15R in two cylinders is reduced, can not only make the size miniaturization more of the axis L direction of motor E, and make bent axle 1 miniaturization own, improve rigidity.Similarly, because the endless chain 45 that drives air inlet cam axle 43i and exhaust cam shaft 43o is configured in the end of crankcase 2 and cylinder block 4, so, reduce the interval of thorax 15L, 15R in two cylinders, make motor E miniaturization.
Endless chain chamber 40 stretches out in the right flank of crankcase 2 and cylinder block 4, the 1st parting plane P1 of crankcase left-half 3L and crankcase right half part 3R, with respect to the median surface C of thorax 15L, 15R in two cylinders towards the right side, promptly lean on towards endless chain chamber 40 1 lateral deviations, so, can make the size W of the axis L direction of crankcase left-half 3L L, and the size W of the axis L direction of crankcase right half part 3R RImpartial.As a result, can prevent that the side of half part 3L, 3R about two from maximizing, make die casting metal mold miniaturization, reduce manufacture cost.
Describe embodiments of the invention above in detail, but can do various design alterations without departing from the spirit and scope of the present invention.
For example, among the embodiment, be 2 bolts 49 3, 49 4Be configured on the median surface C of thorax 15L, 15R in a pair of cylinder, if but these bolts 49 3, 49 4Be configured near the above-mentioned median surface C, also can obtain same effect.In addition, among the embodiment, the median surface C of thorax 15L, 15R in a pair of cylinder, with respect to the 1st parting plane P1 of crankcase left-half 3L and crankcase right half part 3R be towards left to bias, but also can make it towards the right bias.In addition, the bolt number that is configured on the above-mentioned median surface C is not limited to 2, and this bolt can not be a stud bolt also.
As mentioned above, according to the parallel double-cylinder engine of claim 1 record, because bent axle The divisional plane of case is inclined to one side towards axis direction one side of bent axle with respect to the median surface of thorax in a pair of cylinder Lean on, so, when being combined on the crankcase with bolt, be configured in thorax in a pair of cylinder to cylinder block Near the median surface bolt do not disturb with above-mentioned divisional plane, but spiral is screwed into crankcase. Like this, Do not increase number of bolts, not only produce uniform fastening force, and, the interior thorax of a pair of cylinder is connect Closely, the axis direction compact in size of engine be can make, simultaneously, crankcase and cylinder block reduced The area of faying face, improve sealing.
According to the parallel double-cylinder engine of claim 2 record, because bent axle is a pair of by being located at The a pair of axle journal in the thorax outside is bearing on the crankcase in the cylinder, so, can cancel bent axle central authorities Axle journal makes the interior thorax of a pair of cylinder as far as possible approaching, more realizes the miniaturization of engine.
According to the parallel double-cylinder engine of claim 3 record, because needn't be to camshaft The cam drive mechanism that transmits crank-driven power is configured in the centre position of thorax in a pair of cylinder, institute With, can make the interior thorax of two cylinders as far as possible approaching, more realize the miniaturization of engine. And, Owing to cam drive mechanism is configured in a square end of the above-mentioned axis direction of crankcase and cylinder block Section, so, make above-mentioned divisional plane be divided into 2 parts crankcase about the chi of half part Very little equalization, easy to manufacture.

Claims (3)

1. parallel double-cylinder engine has along axis (L) direction of bent axle (1) and is divided into the crankcase (2) of 2 parts and has the cylinder block 4 of thorax (15L, 15R) in a pair of cylinder, with several bolts (49 of the interior thorax (15L, 15R) of parallel this cylinder 1～49 8) cylinder block (4) is combined on the crankcase (2): it is characterized in that, the parting plane (P1) of crankcase (2) is with respect to the median surface C of thorax in a pair of cylinder (15L, 15R), towards side's bias of axis (L) direction of crankshaft (1), simultaneously, above-mentioned several bolts (49 1～49 8) among, near the bolt (49 the median surface C that is configured in thorax (15L, 15R) in the above-mentioned cylinder 3, 49 4) avoid above-mentioned parting plane (P1) spiral be screwed into crankcase (2).
2. parallel double-cylinder engine as claimed in claim 1, it is characterized in that, the outside of thorax in a pair of cylinder (15L, 15R) has a pair of axle journal (7L, 7R), and above-mentioned bent axle (1) is bearing on the crankcase (2) that this a pair of axle journal (7L, 7R) is separated.
3. parallel double-cylinder engine as claimed in claim 1, it is characterized in that, the driving force of bent axle (1) is passed to the driving mechanism (45) of the camshaft (43i, 43o) that is located on the cylinder head (5), be configured in a side the end of above-mentioned axis (L) direction of crankcase (2) and cylinder block (4).
CNB991041259A 1998-03-23 1999-03-18 Parallel double-cylinder engine Expired - Fee Related CN1143956C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP074459/98 1998-03-23
JP07445998A JP3290624B2 (en) 1998-03-23 1998-03-23 Parallel two-cylinder engine
JP074459/1998 1998-03-23

Publications (2)

Publication Number Publication Date
CN1229879A true CN1229879A (en) 1999-09-29
CN1143956C CN1143956C (en) 2004-03-31

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CNB991041259A Expired - Fee Related CN1143956C (en) 1998-03-23 1999-03-18 Parallel double-cylinder engine

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JP (1) JP3290624B2 (en)
KR (1) KR100284655B1 (en)
CN (1) CN1143956C (en)
BR (1) BR9901185A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112664345A (en) * 2019-10-15 2021-04-16 上汽通用汽车有限公司 Cylinder block and engine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4265746B2 (en) * 2003-03-19 2009-05-20 本田技研工業株式会社 Bolt and internal combustion engine
WO2014118746A1 (en) 2013-01-31 2014-08-07 Brp-Powertrain Gmbh & Co. Kg Internal combustion engine having a split crankcase

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112664345A (en) * 2019-10-15 2021-04-16 上汽通用汽车有限公司 Cylinder block and engine

Also Published As

Publication number Publication date
JPH11270401A (en) 1999-10-05
KR19990078080A (en) 1999-10-25
BR9901185A (en) 1999-12-28
CN1143956C (en) 2004-03-31
KR100284655B1 (en) 2001-03-15
JP3290624B2 (en) 2002-06-10

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