JP2000097136A - Starter-cum-power generator for engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an operation failure in a centrifugal governor caused by a weight roller being caught by forming a circular arc part expanded outward on an outer edge circumference of both ends of the weight roller, in the centrifugal governor provided with the weight rollers which are rotated interlocking with rotation of a crankshaft while generating centrifugal force. SOLUTION: A hybrid type power unit mounted on a motor scooter and the like, is provided with a dynamo-electric machine for generating power for assisting output of an engine, and a starter-cum-power generator having a centrifugal governor. The centrifugal governor is provided with a rotor 140 fixed on a crankshaft, and a moving body urged in the direction coming close to the rotor 140 by a spring, and a plurality of weight rollers 142 interposed between the rotor 140 and the moving body are stored in storing recessed parts 146 arranged in the circumferential direction of the rotor 140 at intervals. In this case, a circular arc part 142a expanded outward is formed on a circumference of both end outer edges of each weight roller 142, and smooth movement in the centrifugal direction following rotation of the rotor 140 is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal governor which operates according to the rotation of a crankshaft, a state in which a starting torque can be applied to the crankshaft, and a state in which power is generated by driving the crankshaft. The present invention relates to an engine starting and power generation device including a rotating electric machine switched in response to the change.

[0002]

2. Description of the Related Art Such a starting and generating apparatus is already known, for example, from Japanese Patent Application Laid-Open No. 9-215292.

[0003]

In such a starter / generator, the centrifugal governor is provided with a rotating body fixed to the crankshaft, a rotation about the axis of the crankshaft disabled, and an axial direction of the crankshaft. A plurality of weights are interposed between the moving body and a moving body that is spring-biased in a direction approaching the rotating body so that the weight can be moved in the direction. It operates to move the moving body away from the rotating body as the acting centrifugal force increases.

In the centrifugal governor of the starting and generating device disclosed in Japanese Patent Application Laid-Open No. 9-215292, although balls are used as weights, the contact area between the rotating body and the moving body is increased. In general, a short centrifugal governor generally uses a short columnar weight roller in order to make the moving body approach and move away from the rotating body smoothly.

Therefore, when weight rollers are used for the centrifugal governor in the engine start and power generation device, these weight rollers are provided at a plurality of locations spaced apart in the circumferential direction on one of the opposing surfaces of the rotating body and the moving body. Are respectively accommodated in the accommodation recesses provided. However, if the outer edges of both ends of the weight roller are not chamfered, or if the chamfered portion is tapered even though the chamfering is performed, both ends of the weight roller and both sides of the accommodation recess are formed. If the weight roller is tilted in the housing recess due to the slight gap between the side surface and the side surface, the outer edges of both ends of the weight roller may bite into the inner surface of the housing recess and lock. In particular, in a centrifugal governor used for a starter / generator, a rotating electric machine is brought into a state capable of functioning as a generator by centrifugal force acting on a weight roller when the rotation speed of a crankshaft, that is, the rotation speed of a rotating body is relatively low. Therefore, the outer diameter of the weight roller is set to be relatively small, and the weight roller having a small diameter is apt to be inclined in the accommodation recess, and malfunction of the weight roller due to locking, that is, malfunction of the engine governor is likely to occur. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine starting and power generation device which prevents occurrence of operation failure in a centrifugal governor using a weight roller. .

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, an invention according to a first aspect of the present invention provides a rotating body fixed to a crankshaft of an engine, and a rotation about the axis of the crankshaft. A moving body which is capable of moving in the axial direction of the crankshaft and is spring-biased in a direction approaching the rotating body; and a plurality of locations spaced apart in one circumferential direction of the rotating body and the opposing surface of the moving body. A plurality of weight rollers respectively housed in the provided recesses and interposed between the rotating body and the moving body, and the centrifugal force acting on the weight rollers increases according to the rotation of the crankshaft. A centrifugal governor for moving the moving body away from the rotating body in accordance with the following condition; and a state of functioning as a motor capable of applying a starting torque to the crankshaft when an interval between the rotating body and the moving body is small. And a rotating electric machine in which the state of functioning as a generator driven by the crankshaft when the distance between the rotating body and the moving body is large is switched in accordance with the operation of the centrifugal governor. The apparatus is characterized in that an arc portion having an arc-shaped vertical cross section bulging outward is formed on the entire outer periphery of both ends of each of the weight rollers.

According to this configuration, even if the weight roller is tilted in the accommodation recess and the outer edges of both ends of the weight roller contact the inner surface of the accommodation recess, the outer edges of both ends of the weight roller bulge outward. As a result, the contact surface pressure of the weight roller against the inner surface of the housing recess can be made relatively low, and the outer edges of both ends of the weight roller contact the inner surface of the housing recess to make it slippery. It is possible to minimize the occurrence of operation failure due to this.

The invention according to claim 2 is the same as the above-described claim 1.
In addition to the configuration of the present invention described above, a lubricant is filled in each of the storage recesses, and according to this configuration, the weight roller and the inner surface of the storage recess are lubricated by the lubricant, and the weight roller Occurrence of a malfunction due to the lock can be more effectively prevented.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, each of the recesses is fixed to an outer end of the crankshaft so as to cover the rotating body and the moving body. It is characterized by being substantially sealed by a pulsar rotor for detecting the engine speed. According to this configuration, the housing recess is sealed without using a dedicated part other than the pulsar rotor, and dust enters the lubricant from the outside. And a good lubrication state can be maintained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIGS. 1 to 14 show a first embodiment of the present invention. FIG. 1 is a side view of a scooter type motorcycle, FIG. 2 is a sectional view of a power unit taken along line 2-2 of FIG. 3 is an enlarged sectional view showing the engine and the compressor of FIG. 2, FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG.
FIG. 6 is a diagram showing opening and closing timings of an intake valve, an exhaust valve and a supercharging valve, FIG. 6 is a cross-sectional view showing an enlarged view of the starter / generator shown in FIG. 2, and FIG. 7 is a configuration of an electric circuit related to a commutator of a rotating electric machine. 8, FIG. 8 is a circuit diagram showing a connection state of the commutator and each brush, FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. 6, and FIG. 10 is a view showing a state in which the weight roller is inclined in the accommodation recess. , FIG. 11 is a diagram showing a control system of the engine and the rotating electric machine, FIG. 12 is a diagram showing a throttle opening, a crankshaft rotation speed, and an output torque of the crankshaft when the engine is started, and FIG. FIG. 14 is a graph showing the relationship between the motor output at the time of applying the torque, the engine speed, and the throttle opening. FIG. 14 shows the relationship between the throttle opening, the crankshaft speed, and the output torque of the crankshaft when the assist torque is applied. It illustrates depending.

First, referring to FIG. 1, a body frame F of a scooter-type motorcycle includes a head pipe 12 for supporting a front fork 11 on which a front wheel WF is suspended, and a down tube 1 extending downward from the head pipe 12.
3, and a rear frame 14 which is connected to the lower end of the down tube 13 and extends rearward. The rear frame 14 has a front end connected to a lower end of the down tube 13 and extending substantially horizontally toward the rear side, and a pair of front frame parts 14a. It has a pair of intermediate frame portions 14b extending and a rear frame portion 14c interconnecting the rear ends of both intermediate frame portions 14b... And is formed in a substantially elliptical shape in plan view.

The vehicle body frame F is covered by a vehicle body cover 15 having a floor board 15a for supporting the driver's feet, and a seat 16 on which the driver sits is provided at the rear of the vehicle body cover 15.

Rear frame 14 of body frame F
The front portion of the power unit P is supported by the intermediate frame portions 14b so as to be swingable about an axis parallel to the rotation axis of the rear wheel WR, and the rear wheel WR is supported by the rear portion of the power unit P.

In FIG. 2, the power unit P comprises:
A water-cooled, four-stroke, single-cylinder engine E arranged in front of the rear wheel WR, a transmission means 17 provided between the engine E and the rear wheel WR, and a starter / generator 18 connected to the engine E; Is provided.

Referring to FIG. 3 and FIG. 4, the cylinder block 20 of the engine E is
The cylinder 21 is disposed so that the axis of the cylinder 21 is substantially horizontal along the front-rear direction of the motorcycle. A combustion chamber 24 is formed between the piston 23 and the piston 23 to be fitted. The piston 23 is connected via a connecting rod 25 and a crank pin 26 to a crankshaft 27 having a rotation axis parallel to the rotation axis of the rear wheel WR.
The first and second ball bearings 29, 7 are provided on a crankcase 28 formed integrally with the cylinder block 20.
It is rotatably supported via 30.

The cylinder head 22 has the combustion chamber 24
Are provided with an intake port 31, an exhaust port 32, and a supercharging port 33, respectively. The intake valve 34 and the exhaust valve 35 that open and close the intake port 31 and the exhaust port 32, respectively, are arranged substantially in a V-shape in a projection on a plane including the rotation axis of the crankshaft 27 and the axis of the cylinder 21. A supercharging valve 36 attached to the head 22 for opening and closing the supercharging port 33 and a spark plug 37 facing the combustion chamber 24 are provided with the intake valve 34 and the exhaust valve 35.
Are attached to the cylinder head 22 so as to be arranged in a substantially V-shape in a direction crossing a substantially cross shape in the parallel direction. Thus, the intake valve 34, the exhaust valve 35, and the supercharging valve 36 are respectively spring-biased in a direction to close the intake port 31, the exhaust port 32, and the supercharging port 33.

The cylinder head 22 has a crankshaft 27
One end of a valve operating camshaft 38 having an axis parallel to the axis of the shaft is rotatably supported via a third ball bearing 39, and a middle portion in the longitudinal direction of the valve operating camshaft 38 supports a fourth ball bearing 40. The valve camshaft 38 has intake and exhaust cams 41 and 42 disposed between third and fourth ball bearings 39 and 40, and a fourth ball bearing 40. And a supercharging cam 43 that is disposed more outwardly. Thus, the intake cam 41 and the exhaust cam 42 are respectively engaged with the intake valve 34 and the exhaust valve 35 via the intake and exhaust rocker arms 44 and 45, respectively, and are formed as tapered supercharging cams. 43 is directly engaged with the supercharging valve 36.

A driven sprocket 48 is fixed to the valve operating cam shaft 38 at a position opposite to the fourth ball bearing 40 and adjacent to the supercharging cam 43. On the other hand, a driving sprocket 49 is fixed on the crankshaft 27 at a position outside the second ball bearing 30 and corresponding to the driven sprocket 48, and the driving and driven sprockets 49 and 48 have endless cam chains. 50 is wound. With the driving sprocket 49, the driven sprocket 48, and the cam chain 50, the valve operating camshaft 38 is rotated at half the rotation speed of the crankshaft 27.
Is driven to rotate. Thereby, the intake valve 34 and the exhaust valve 35
The supercharging valve 36 opens and closes at the timing shown in FIG. 5, and the supercharging valve 36 opens just before the intake valve 34 closes.

In the cylinder block 20 and the cylinder head 22, a storage chamber 51 for storing the driving sprocket 49, the driven sprocket 48 and the cam chain 50 is formed. An opening 52 provided in the cylinder head 22 through the storage chamber 51 is closed by a lid member 53. An opening 54 communicating with the storage chamber 51 at a portion facing the crankshaft 27 is provided in the crankcase 28.
Is closed by the starter / generator 18.

In the storage chamber 51, the crankshaft 2
7, a drive gear 55 is fixed between the drive sprocket 49 and the second ball bearing 30, and the drive gear 55 drives an oil pump (not shown).

By the way, an intake device 58 (see FIG. 1) including an air cleaner 56 and a carburetor 57 and an exhaust device (not shown) are connected to the intake port 31 and the exhaust port 32, respectively. Supply port 33
Is connected to a reciprocating compressor 60. The compressor 60 is driven by the valve operating camshaft 38 and is disposed adjacent to the outside of a lid member 53 coupled to the cylinder head 22 so as to close the opening 52 of the storage chamber 51. .

The compressor 60 has a cylinder hole 61 extending parallel to the axis of the cylinder 21 in the engine E.
A first and a second pump cylinder head 63, 64 coupled to the cylinder body 62 so as to close both ends of the cylinder hole 61, and a first pump cylinder head 63. A pump piston (67) is formed between the pump chamber (65) and the second pump cylinder head (64) to form a second pump chamber (66) and slidably fit in the cylinder hole (61).

A pump crankshaft 68 having a rotation axis coaxial with the valve operating camshaft 38 of the engine E is rotatably provided at an intermediate portion in the axial direction of the cylinder body 62 through fifth and sixth ball bearings 69 and 70. One end of the pump crankshaft 68 is rotatably penetrated through the cylinder body 62 and the lid member 53, and is coaxially and non-rotatably connected to the other end of the valve operating camshaft 38 in the storage chamber 51. Is done. That is, the pump crankshaft 68 is
An annular seal member 71 is provided between the lid member 53 and the pump crankshaft 68.

A connecting rod 72 is attached to the pump crankshaft 68.
The pump piston 67 is connected to the pump piston 67 via a pump crankshaft 68.
Of the pump crankshaft 6 so as not to interfere with the reciprocating operation of the pump piston 67 in accordance with the rotation of the pump crankshaft 6.
8 is provided.

First and second pump cylinder heads 6
The annular discharge chambers 74 and 75 are provided in the discharge chambers 3 and 64, and the suction chambers 76 and 77 are respectively provided so as to be surrounded by the discharge chambers 74 and 75. Are connected to each other, and the suction chambers 76 and 77 are also connected to each other.

The suction chambers 76 and 77 are communicated with the suction device 58. Between the suction chambers 76 and 77 and the pump chambers 65 and 66, the pressure in the pump chambers 65 and 66 becomes low. A suction valve (not shown) that opens is provided. A discharge valve (not shown) is provided between the two discharge chambers 74 and 75 and the two pump chambers 65 and 66 to open as the pump chambers 65 and 66 become high pressure. 75
For example, a discharge conduit 78 having one end passed through 74 is provided between the pump cylinder heads 63 and 64, and the other end of the discharge conduit 78 communicates with one end of a discharge passage 79 provided in the second pump cylinder head 64. I do. Further, the lid member 53 for closing the opening 52 is provided with the discharge passage 79.
A conduit portion 81 that forms a passage 80 that communicates with the other end of the engine E is formed integrally with the cylinder head 22 of the engine E such that the other end of the passage 80 communicates with the supercharging port 33. Is fitted airtightly.

By the reciprocating compressor 60, the supercharging valve 36 is opened from the supercharging port 33 to the combustion chamber 24 in response to the opening of the supercharging valve 36 immediately before the closing of the intake valve 34 when the engine E is operated. As a result, the air is pushed in. As a result, the charging efficiency is improved, and the output torque of the engine E is increased.

Referring again to FIG. 2, a transmission case 84 is connected to the crankcase 28 of the engine E and extends to the left of the rear wheel WR in a state facing forward in the traveling direction of the motorcycle. The transmission case 84 includes a case body 85 connected to the crankcase 28, and the case body 85.
A left cover 86 formed from the left side to the case body 85 by forming a first transmission chamber 88 between the case body 85 and the case body 8
5 and a right cover 87 fastened to the right rear of the case body 85.

At the front of the case main body 85 of the transmission case 84, a support arm 90 is provided so as to be disposed on the side of the cylinder block 20 of the engine E. The intermediate frame portions 14b of the rear frame 14 in the body frame F are swingably supported.

The axle 91 of the rear wheel WR is rotatably supported by the rear part of the case body 85 in the transmission case 84 and the right cover 87. As shown in FIG. 1, a rear cushion 92 is provided between a rear portion of the case main body 85 and the intermediate frame portion 14b of the rear frame 14 of the vehicle body frame F.

A transmission means 17 provided between the engine E and the rear wheel WR is provided with a V-belt type continuously variable transmission mechanism 93 housed in a first transmission chamber 88, and between the continuously variable transmission mechanism 93 and the axle 91. And a reduction gear train 94 provided.

The continuously variable transmission mechanism 93 includes a drive transmission pulley 95 connected to one end of the crankshaft 27 and a crankshaft 2.
A driven transmission pulley 98 mounted via a centrifugal clutch 97 to a driven shaft 96 rotatably supported by the rear part of the case main body 85 and the right cover 87 with an axis parallel to 7.
And an endless V wound around both transmission pulleys 95 and 98.
And a belt 99.

The drive-side transmission pulley 95 is connected to the crankshaft 27.
Fixed pulley half 95a fixed to the crankshaft 27
And a movable pulley half 95b which is mounted to be slidable in the axial direction. V is between the two pulley halves 95a and 95b.
A V-shaped belt 100 is inserted into the annular groove 100. A ramp plate 101 is fixed to the crankshaft 27 on the back side of the movable pulley half 95a, and the movable pulley half 95a and the ramp plate 10
A plurality of weight rollers 102 are accommodated in a floating state in one space. When the rotation speed of the crankshaft 27 increases,
The weight roller 102 which receives the centrifugal force
To move the movable pulley half 95a closer to the fixed pulley half 95b. As a result, the contact radius of the V-belt 99 to the two pulley halves 95a and 95b increases.

On the other hand, the driven transmission pulley 98 is
6, a support cylinder 103 connected via a centrifugal clutch 97 and rotatably supported on a driven shaft 96;
Fixed pulley half 98a formed integrally with the support cylinder 1
And a movable pulley half 98b spring-biased in a direction approaching the fixed pulley half 98a. The V-shaped annular groove 104 formed between the two pulley halves 98a, 98b. The V belt 99 is inserted. Thus, as the contact radius of the V-belt 99 with the drive-side transmission pulley 95 increases, the contact radius of the V-belt 99 with the driven-side transmission pulley 98 of the V-belt 99 decreases. Then, the movable pulley half 98b moves in the axial direction, whereby a continuously variable transmission is performed between the crankshaft 27 and the driven shaft 96 in accordance with the rotation of the crankshaft 27.

A kick shaft 106 is rotatably supported on a left cover 86 of the transmission case 84, and a kick pedal 105 (see FIG. 1) is provided at an outer end of the kick shaft 106. On the inner side of the left cover 86, between the kick shaft 106 and the crank shaft 27, a kick-type starting device 107 for transmitting the power of the kick shaft 106 to the crank shaft 27 in accordance with the depression operation of the kick pedal 105.
Is provided.

The reduction gear train 94 is provided between the driven shaft 96 and the axle 91 and is housed in the second transmission chamber 89. The rotational power of the driven shaft 96 in the continuously variable transmission 93 is reduced by the reduction gear train 94. And transmitted to the axle 91 of the rear wheel WR.

The starter / generator 18 includes a rotating electric machine 110
And a centrifugal governor 111. The starter / generator 18 is connected to the other end of the crankshaft 27 of the engine E, that is, to the end of the crankshaft 27 of the transmission means 17 opposite to the side to which the continuously variable transmission mechanism 93 is connected. The wheel WR is disposed outside the side end of the wheel WR opposite to the transmission case 84.

The rotating electric machine 110 functions as a starter motor for applying a starting torque to the engine E,
The power unit P can switch between a state of functioning as an assist motor for applying assist torque to the engine E and a state of functioning as a generator driven by the power of the engine E. 1
7 and a motor (rotating electric machine 110) that assists the output of the engine E.

In FIG. 6, a rotating electric machine 110 includes an inner rotor 112 fixed to the other end of the crankshaft 27.
An outer stator 113 surrounding the inner rotor 112, a commutator 114 fixedly supported by the outer stator 113, and a spring mounted in a direction close to the commutator 114 while being disposed between the commutator 114 and the inner rotor 112. And an energized brush assembly 115.

The inner rotor 112 has a rotor boss 11
6, a magnet 117 is provided on the outer periphery of the crankshaft 27. A taper shaft 27a coaxially provided on the other end of the crankshaft 27 is fitted to the rotor boss 116, and the end of the crankshaft 27 protruding from the rotor boss 116 is provided. Nut 11
By screwing 8, rotor boss 116 is fixed to the other end of crankshaft 27. Also, the rotor boss 116
, A rotor cover 119 that covers the magnet 117 is fixed.

The outer stator 113 is formed by winding, for example, a single-phase six-pole coil 121 around a stator core 120, and the stator core 120 is fixed to a stator case 122. This stator case 122
Is formed in a bowl shape so as to cover a portion of the coil 21 inward of the stator core 120 along the axial direction of the crankshaft 27, the commutator 114, and the brush assembly 115. The crankcase 2 of the engine E
8 is provided in the stator case 12.
The second end wall 122a is fastened to the crankcase 28 so as to be closed. The crankshaft 27 rotatably penetrates a central portion of an end wall 122a of the stator case 122, and an annular seal member 123 is provided between an inner peripheral portion of the end wall 122a and an outer periphery of the stator case 122.

The commutator 114 has a through-hole 124a at the center thereof through which the crankshaft 27 penetrates gently, and has a brush assembly 115 of a commutator holder 124 formed of a non-conductive material such as synthetic resin in a substantially disk shape. As shown in FIG. 7, the first conductive path 125 and the second conductive path 12 coaxially surrounding the first conductive path 125
6 and a number corresponding to the number of poles of the coil 121 at equal intervals around the second conductive path 126, for example, six commutator pieces 1
And the commutator holder 1
Reference numeral 24 is arranged so as to be close to and opposed to the inner surface of the end wall 122 a of the stator case 122, and is fixedly supported by the stator core 119.

The first conductive path 125 is connected to the negative terminal of the battery 128, the second conductive path 126 is connected to the positive terminal of the battery 128 via the relay switch 131, and each commutator piece 127 is connected to the outer side. Stator 11
3 is connected to the connection point between the coils 121 of each pole.

A relay coil 132 and a starter switch 129 are connected in series between a positive terminal and a negative terminal of the battery 128.
2 and the relay switch 131 are the starter relay 1
30. That is, the relay switch 131 conducts in response to the excitation of the relay coil 132 in accordance with the conduction of the starter switch 129.

The brush assembly 115 includes the inner rotor 1
A brush holder 133 made of a non-conductive material is provided between the commutator 114 and the inner rotor 112 so as to be able to rotate around the axis of the crankshaft 27 together with the shaft 12 and to reciprocate in the axial direction of the crankshaft 27. A coil-shaped spring 134 surrounding the crankshaft 27 is provided between the brush holder 133 and the rotor boss 116 of the inner rotor 112. The spring force of the spring 134
That is, the brush assembly 115 is urged in a direction approaching the commutator 114.

Referring also to FIG. 8, the brush holder 13
Reference numeral 3 designates a minus common brush 135 that is always in sliding contact with the first conductive path 125 of the commutator 114, and three pieces that are commonly connected to the minus common brush 135 and that can slidably contact the commutator pieces 127 of the commutator 114. And the second brush of the commutator 114
Positive common brush 137 constantly in contact with conductive path 126
And three plus-side individual brushes 138 that are commonly connected to the plus-side common brush 137 and that can slidably contact the commutator pieces 127 of the commutator 114 are biased by spring toward the commutator 114 side. Will be retained.

Referring again to FIG. 6, the centrifugal governor 111
The rotating body 1 fixed to the crankshaft 27 by being formed integrally with the rotor boss 116 of the inner rotor 112
40 and a moving body 1 disposed opposite to the rotating body 140
41, and a plurality of weight rollers 142 interposed between the rotating body 140 and the moving body 141.

Referring also to FIG. 9, the rotating body 140 is
On the side opposite to the brush assembly 115, the rotor boss 116
Are formed integrally. An outer end surface of the rotating body 140, that is, a surface facing the opposite side to the brush assembly 115, has a cylindrical portion 143 coaxial with the crankshaft 27 and a cylindrical portion 14
3 and a circular groove 14 which is opened at the inner peripheral edge of the concave portion 144 and is continuous with the outer surface of the cylindrical portion 143.
5 and accommodation recesses 146... Arranged at a plurality of locations, for example, six locations, at equal intervals in the circumferential direction of the recess 144.

The cylindrical portion 143 is formed so as to have an inner diameter that allows a nut 118 screwed to the other end of the crankshaft 24 to be inserted.
And is screwed to the other end of the crankshaft 27.

Each of the receiving recesses 146 is formed so as to extend from the annular groove 145 in the radial direction of the rotating body 140, and gradually becomes shallower toward the outside along the radial direction of the rotating body 140. , Are formed.

On the other hand, the moving body 141 is slidable along the axial direction of the crankshaft 27 so as to be fitted into the annular groove 145 of the rotating body 140, and from the outer end of the guide cylinder 147. The rotating body 14 extends outward in the radial direction.
And a disc-shaped contact plate portion 148 housed in the concave portion 144 of the moving object 141.
Faces the rotating body 140.

On the other hand, the brush holder 133 of the brush assembly 115 is connected to one end of a plurality of, for example, a pair of connecting shafts 149, 149 having an axis parallel to the crankshaft 27 and penetrating the rotating body 140 and the rotor boss 116. The other ends of the connection shafts 149, 149 are connected to the contact plate 148 of the moving body 141. Therefore, the contact plate portion 148, that is, the moving body 141, cannot rotate relative to the rotating body 140, that is, the inner rotor 112, but can move toward and away from the rotating body 140 along the axial direction of the crankshaft 27, Since the brush holder 133 is urged by the spring 134 in the direction approaching the fixed commutator 114, the moving body 141 is also urged in the direction approaching the rotating body 140.

In this embodiment, one of the opposing surfaces of the rotating body 140 and the moving body 141, and in this embodiment, the moving body 1 of the rotating body 140
41 are interposed between the rotating body 140 and the contact plate 148 of the moving body 141 in accommodating recesses 146 provided at a plurality of places, for example, six places, which are spaced apart from each other in the circumferential direction of the surface facing the base 41. Are accommodated in this manner.

In such a centrifugal governor 111,
As the centrifugal force acting on each weight roller 142 increases in accordance with the rotation of the crankshaft 27 and the rotating body 140, each weight roller 142.
Move toward the outside in the radial direction of the rotating body 140, and the depth of each of the recesses 146.
The moving body 141 is pushed by the weight rollers 142 so as to be separated from the rotating body 140 because the moving body 141 becomes shallower toward the outside along the radial direction. Thereby,
When the rotation speed of the crankshaft 27 becomes equal to or higher than a predetermined rotation speed set to be equal to or lower than the idle rotation speed, the brush assembly 115 separates from the commutator 114 and the brushes 135, 13
6, 137, 138... Are the first commutator 114.
Conductive path 125, second conductive path 126 and each commutator strip 12
7 ...

The weight of each of the weight rollers 142 increases when the rotation speed of the engine E becomes equal to or higher than a predetermined rotation speed which is smaller than the idle rotation speed.
, Each brush 135, 136
, 137, 138 are set apart from the first conductive path 125, the second conductive path 126, and the respective commutator pieces 127.
The outer diameter of 2 ... is relatively small.

When the outer diameter of each of the weight rollers 142 is relatively small as described above, a slight gap is formed between both ends of the weight roller 142 and both inner side surfaces of the accommodation recess 146 as shown in FIG. Since there is a gap, weight roller 1
42 easily tilts in the accommodation recess 146. When the weight roller 142 is tilted in the housing recess 146 in this manner, the outer edges of both ends of the weight roller 142 are not chamfered, or even if the chamfering is performed, the chamfered portion is tapered. Has a weight roller 14
In some cases, the outer edges of both ends may be locked by being engaged with the inner surface of the housing recess 146. Therefore, the weight roller 14
In order to avoid the occurrence of locking due to the biting of the outer edges of both ends of the weight roller 142, the outer edges of both ends of the weight rollers 142 are formed with an arcuate surface 142 having an arc-shaped vertical cross-sectional shape bulging outward.
are formed respectively.

In addition, each of the recesses 146 is filled with grease 150 as a lubricant.

A pulsar rotor 151 projecting outward from the outer periphery of the rotating body 140 is fastened to the end face of the rotating body 140 opposite to the brush assembly 133 so as to cover the recess 144. The cooling fan 152 arranged on one side is also fastened to the rotating body 140 together with the pulsar rotor 151. That is, the pulsar rotor 151 is fixed to the outer end of the crankshaft 27 so as to substantially seal the respective accommodation recesses 146 of the centrifugal governor 111.

On the other hand, a rotation speed sensor 153 facing the outer periphery of the pulsar rotor 151 is attached to the stator case 122, and the rotation speed sensor 153 detects the rotation speed of the crankshaft 27, that is, the engine E.

The engine E and the starter / generator 18 are
The shroud 155 is provided with a cooling air inlet 156 corresponding to the cooling fan 152 of the starter / generator 18. Therefore, by the rotation of the cooling fan 152 according to the rotation of the crankshaft 27, cooling air is taken into the shroud 155 from the cooling air inlet 156, and the engine E and the rotating electric machine 110 are cooled by the cooling air. . Moreover, the radiator 1 circulates cooling water between the cylinder block 20 of the engine E and the water jacket 157 provided on the cylinder head 22.
58 is fixedly disposed on the front side of the starter / generator 18 so that a part of the cooling air flows from the cooling fan 152 in the shroud 155 and a part thereof protrudes from the shroud 155. You.

In FIG. 11, an ignition device 161 connected to the ignition plug 37 of the engine E is controlled by a control unit 162.
62, a detection value of a rotation speed sensor 153 for detecting the rotation speed of the engine E, a detection value of a throttle sensor 164 attached to the throttle grip 163, and an idle switch 165 for permitting or restricting idling of the engine E. A signal and a detection value of a vehicle speed sensor 166 for detecting the vehicle speed are input.

The control unit 162 stops the operation of the engine E when the motorcycle is stopped, that is, when the value detected by the vehicle speed sensor 166 indicates that the motorcycle is stopped. A start / stop mode in which the engine E is started in response to the operation of the throttle grip 163 in the start, that is, a stop state, and an idling permission mode in which idling is permitted for the purpose of warming-up operation when the engine E is started. Can be switched according to the operation of the idle switch 165.

The rotating electric machine 110 has an energization control circuit 1
67 is provided, and the control unit 162 includes:
Assists the rotating electric machine 110 when the motorcycle starts in the stop starting mode and the idling permission mode, and the start control mode in which the rotating electric machine 110 functions as a starter motor when the engine E starts, regardless of the stop start mode and the idling permission mode. Switching between three control modes, an assist control mode in which the motor functions as a motor, and a power generation control mode in which the rotating electric machine 110 functions as a generator during the running of the motorcycle regardless of the stop / start mode and the idling permission mode. The control circuit 167 is controlled.

As shown in FIG. 7, the energization control circuit 167 includes an FET (field effect type) as an energization control element interposed between the connection point between the coils 121 of each pole and the negative terminal of the battery 128. Transistor) 1
68, FET169 as an energization control element interposed between the connection point between the coils 121 of each pole and the plus side terminal of the battery 128, and each FET168
, 169 are connected in parallel with the diodes 17 respectively.
0, 171...

The start control mode of the control unit 162 is as follows.
The state where the engine speed is equal to or lower than a predetermined number of revolutions smaller than the idle speed, the state where the starter switch 129 is pressed, and the brushes 135 and 135 of the brush assembly 115
136, 137... 138 are the first conductive path 125, the second conductive path 126 of the commutator 114 and each commutator 12
.., 169... In the energization control circuit 167 in this control mode.
Is turned off. Thus, when the engine E is stopped, the brush assembly 115 is
137, 138,... Are located close to the commutator 114 side so as to make sliding contact with the first conductive path 125, the second conductive path 126, and each commutator 127 of the commutator 114, respectively. Since the motor operates as a motor, a current flows from the battery 128 to each coil 121 of the outer stator 113 due to the conduction of the relay switch 131 in accordance with the conduction operation of the starter switch 129. As a result, the inner rotor 112 rotates, and a starting torque is applied to the crankshaft 27 from the inner rotor 112.

Rotating electric machine 1 functioning as starter motor
The engine E is started by giving the starting torque from 10,
When the rotation speed of the engine E is equal to or higher than the predetermined rotation speed, the centrifugal governor 111 causes the brushes 135, 136, 1
37, 138, are connected to the first conductive path 1 of the commutator 114.
By moving the brush assembly 115 away from the second conductive path 126 and the commutators 127, the application of the starting torque from the rotating electric machine 110 to the engine E is stopped.

The assist control mode when the motorcycle starts in the stop / start mode is such that the engine E is switched to the engine E for a predetermined time T from the time when the engine speed becomes equal to or higher than a set speed NS which is set to be larger than the idle speed NS. The control unit 162 operates the rotating electric machine 110 so as to apply the assist torque. In this assist control mode, the control unit 162 is controlled based on the detection values of the rotation speed sensor 153 and the throttle sensor 164.
Are the FETs 168..., 1 in the energization control circuit 167.
69... Are controlled so that the rotating electric machine 11
0 works as a brushless motor.

As shown in FIG. 12A, when the throttle opening is increased by the throttle grip 163 to start the motorcycle in the stop / start mode, as shown in FIG. The crankshaft 27 is driven to rotate by the rotating electric machine 110 until the set time T elapses from the time when the engine rotation speed becomes equal to or higher than the set rotation speed NS. It increases in addition to the rotation speed of E. Further, as shown in FIG.
The output torque of the crankshaft 27 is increased by adding the assist torque from 10 as indicated by the hatched portion.

At this time, as shown in FIG. 13, the output torque of the rotating electric machine 110 functioning as an assist motor increases linearly with the increase of the throttle opening.
Each of the FETs in the energization control circuit 167 is changed so that the output torque of the rotary electric machine 110 changes in accordance with the engine speed and the throttle opening.
The conduction / interruption of 168...
Is controlled by

Also, even in the assist control mode when the motorcycle starts in the idling permission mode,
The control unit 162 controls the control unit 1 based on the detection values of the rotation speed sensor 153 and the throttle sensor 164.
62 denotes each FET 168 in the energization control circuit 167.
, 169 are controlled.

As a result, as shown in FIG.
When the throttle opening is increased by the throttle grip 163 to start the motorcycle after the engine is warmed up by idling, as shown in FIG. 14B, the rotating electric machine 11 starts rotating when the engine speed becomes equal to or higher than the set speed NS.
When the crankshaft 27 is rotationally driven at 0, the rotational speed of the crankshaft 27 increases in addition to the rotational speed of the engine E, as shown by the hatched portion.
As shown in (c), the output torque of the crankshaft 27 increases because the assist torque from the rotary electric machine 110 is added as shown by the hatched portion.

Thus, the rotating electric machine 110 functions as a starter motor which is a brush motor in the start control mode, and functions as an assist motor which is a brushless motor in the assist control mode. Thus, the torque required for the starter motor is relatively large, and by using a brush motor, a large current is applied to the coil 121 to apply a large torque to the rotating electric machine 110.
Can be output. Also, the torque required for the assist motor when the vehicle starts is relatively small,
Since delicate output control according to the engine speed and the throttle opening is required, by using the rotating electric machine 110 as a brushless motor, an inexpensive energization control element that does not need to withstand a large current, the FET 168 in this embodiment.
, 169 ... can be used. The brushless motor generally requires a rotation sensor capable of detecting an absolute angle for starting the brushless motor. However, since the rotating electric machine 110 functions as a brushless motor while the engine E is rotating, detection of the reference angle is not possible. It is easy and the structure of the rotation sensor can be simplified.

When a brushless motor is used as a starter motor, an expensive element that can withstand a large current is required as a conduction control element. When a brush motor is used as an assist motor, the motor is frequently turned on and off. Is repeated, so that maintenance due to wear of the brush becomes complicated.

The power generation control mode is executed when the engine E is rotating at a rotation speed equal to or higher than the set rotation speed NS and is not in the assist control mode. In this power generation control mode, the control unit 162 First, the FET 1 connected to the positive connection terminal of the battery 128
69.. Are shut off, the FETs 168... Connected to the negative connection terminal of the battery 128 are turned on. As a result, the power generation voltage of the coil 121 is increased, as indicated by the solid arrow in FIG. Next, the control unit 162 cuts off the FETs 168 connected to the minus connection terminal while keeping the FETs 169 connected to the plus connection terminal of the battery 128 turned off. Then, as indicated by the dashed arrow in FIG. 7, the battery 128 is charged with the generated voltage boosted by the coil 121.

In this power generation control mode, the control unit 162 operates the FET 16 according to the voltage of the battery 128.
8, the duty ratio is controlled. That is, when the voltage of the battery 128 is lower than the predetermined voltage, the duty ratio is increased to increase the charging current, and when the voltage of the battery 128 is equal to or higher than the predetermined voltage, the duty ratio is reduced to reduce the charging current. The control unit 162 controls the interval ratio between the conduction and the interruption of the FETs 168.

The control unit 162 controls the interval between the energization and the cutoff of the FETs 168 also according to the throttle opening and the engine speed. That is, when the throttle is returned or the throttle opening is fully closed, the duty ratio is increased to increase the amount of power generation, and the control unit 162 controls the interval between energization and cutoff of the FETs 168 so that the rotating electric machine 110 operates as a regenerative brake. The ratio is controlled.

Next, the operation of the first embodiment will be described. The power unit P includes an engine E, transmission means 17 for transmitting the output of the engine E to the rear wheels WR, and power for assisting the output of the engine. The power unit P may include a starter motor that can perform and a rotating electric machine 110 that can function as an assist motor.
Reference numeral 10 is connected to an end of the crankshaft 27 opposite to the transmission means 17. That is, the rotating electric machine 110 is connected to the crankshaft 27 located at a position close to the swing fulcrum of the power unit P to the vehicle body frame F, and the hybrid power unit P is used to reduce the unsprung load of the rear cushion 92. The swing performance of the power unit P can be avoided.
Is not adversely affected, and the riding comfort and steering stability of the motorcycle can be improved.

The operation of the engine E and the rotating electric machine 110 is controlled by a control unit 162. The control unit 162 stops the engine E when the vehicle stops, starts the engine E when the vehicle starts, and operates as an assist motor when the vehicle starts. Rotating electric machine 110 to function
, The stop / start of the engine E is controlled in accordance with the stop / start of the vehicle, so that unnecessary consumption of fuel and emission of exhaust gas can be prevented, and the engine E can be operated efficiently. . Moreover, the vehicle can be started quickly by applying the assisting force from the rotating electric machine 110 to the engine output when the vehicle starts and accelerates.

Further, the rotating electric machine 110 includes an engine E
Is controlled by the control unit 162 so as to apply a starting torque to the engine E when the engine is started.
10 can be used not only as an assist motor for assisting the output of the engine E, but also as a starter motor.

The rotary electric machine 110 and the centrifugal governor 111 constitute the starting and generating device 18. The starting and generating device 18 is located at a position opposite to the side end of the rear wheel WR opposite to the transmission case 84. Are also arranged outside and connected to the crankshaft 27 of the engine E. Therefore, regardless of the type of the engine E, the starter / generator 1
8 is disposed outside the rear wheel WR, and avoids a design change in accordance with the type of the engine E and an extension of the wheel base.
R interference can be reliably prevented.

The engine E is a four-stroke engine. The length of the cylinder head 22 in the direction along the cylinder axis is larger than that of the two-stroke engine. In a motorcycle on which the four-stroke engine E is mounted, a wheel base is used. Is set to be larger than that of a motorcycle equipped with a two-cycle engine, and the starting torque required when starting the engine E of four cycles is larger than the starting torque of the two-cycle engine. Not get. However, since the starter / generator 18 is disposed outside the side end opposite to the transmission case 84 of the rear wheel WR, the design change according to the type of the engine E and the extension of the wheel base can be avoided. Start and power generator 1
8 and the effect of reliably preventing interference between the rear wheels WR can be obtained.

Further, the engine E is mounted on a motorcycle with its cylinder axis substantially horizontal. In such a motorcycle, starting and avoiding a design change according to the type of the engine E and an extension of the wheel base are avoided. The effect of reliably preventing the interference between the power generation device 18 and the rear wheel WR can be more remarkably obtained.

In the centrifugal governor 111 of the starting and generating device 18, a plurality of weight rollers 142 interposed between the rotating body 140 and the moving body 141
Are accommodated in accommodating recesses 146... Provided at a plurality of locations spaced apart in the circumferential direction on the surface facing the 0 moving body 141. Moreover, the weight of each weight roller 142 ...
Due to the centrifugal force acting on each of the weight rollers 142 when the rotation speed of the engine E becomes equal to or higher than a predetermined rotation speed smaller than the idle rotation speed, each of the brushes 135, 136,.
37, 138... Are the first conductive path 125 and the second conductive path 12
6 and the respective commutator pieces 127..., And the outer diameter of each weight roller 142 is relatively small. Therefore, due to the slight gap between both ends of the weight roller 142 and both inner surfaces of the housing recess 146, the weight rollers 142.
.. Are easily inclined in the inside, but arc portions 142a having an arc-shaped vertical cross-sectional shape bulging outward are formed around the outer edges of both ends of each weight roller 142. As a result,
The weight rollers 142 are inclined in the accommodation recesses 146, and outer edges of both ends of the weight rollers 142 are accommodated in the accommodation recesses 14.
6. Even if the inner surface of the
2 has a circular arc shape that bulges outwardly at both ends, so that the contact surface pressure of the weight rollers 142 with respect to the inner side surfaces of the receiving recesses 146 is relatively low, and the weight rollers 142
Can be made to slide easily by contacting the outer edges of both ends with the inner side surface of the accommodation recess, and the malfunction of the centrifugal governor 111 caused by the locking of the weight rollers 142 can be prevented as much as possible.

Further, the grease 150 is provided in each of the recesses 146.
Are filled, the gap between the inner surfaces of the weight rollers 142 and the accommodation recesses 146 is lubricated by the grease 150, and the occurrence of malfunction due to the locking of the weight rollers 142 can be more effectively prevented.

Further, each of the housing recesses 146.
0 and a pulser rotor 15 for detecting the engine speed, which is fixed to the outer end of the crankshaft 27 so as to cover the moving body 141.
1 to seal the accommodation recesses 146... Without using dedicated parts other than the pulsar rotor 151.
It is possible to prevent dust from entering the grease 150 from the outside and maintain a good lubrication state.

FIG. 15 shows a second embodiment of the present invention. The coil 121 of the outer stator 113 may be formed in three phases.
Reference numeral 7 'denotes three FETs 1 provided between the coil 121 of each phase and the negative terminal of the battery 128, respectively.
68, and the coil 121 of each phase and the battery 128
FET1 interposed between the plus side terminals of
69 and diodes 170 ... 171 connected in parallel to the FETs 168 ... 169.

FIG. 16 and FIG. 17 show a third embodiment of the present invention, in which parts corresponding to the above embodiments are given the same reference numerals.

In a three-wheeled motor vehicle having left and right rear wheels WRL, WRR, a power unit P ′ swingably supported on the body frame thereof includes a water-cooled four-cycle single-cylinder engine E ′ having a compressor 60 and A transmission means 17 is provided between the engine E 'and the left and right rear wheels WRL, WRR, and a starter / generator 18 connected to the engine E'.

In the engine E ', the left and right crankcases 28L and 28L are provided in a cylinder block 20' provided with a cylinder 21 in which a piston 23 is slidably fitted.
28R are connected, and the left crankcase 28L is
It constitutes a part of a transmission case 84 'for accommodating the transmission means 17.

A crankshaft 27 is rotatably supported on the left and right crankcases 28L, 28R via first and second ball bearings 29, 30. The transmission means 17 is provided at one end of the crankshaft 27. Be linked.

A valve operating cam shaft 38 for opening and closing an intake valve and an exhaust valve (not shown) and a supercharging valve 36 is provided on the cylinder head 22 of the engine E 'via third and fourth ball bearings 39 and 40. It is supported rotatably.

A cam chain 50 is attached to a driving sprocket 49 fixed to the crankshaft 27 outside the right crankcase 28R and a driven sprocket 48 fixed to the valve camshaft 38 corresponding to the driving sprocket 49. Is wound, and the driving sprocket 49 and the driven sprocket 48
A storage chamber 51 'for storing the cam chain 50 is formed over the right crankcase 28R, the cylinder block 20', and the cylinder head 22. In addition, an opening 54 'communicating with the storage chamber 51' is provided in the right crankcase 28 at a portion facing the crankshaft 27, and this opening 54 'is closed by the stator case 122' of the starting and generating device 18 '. Is done.

The starting and power generation device 18 ′ is
And a centrifugal governor 111. An outer stator 113 of the rotating electric machine 110 is supported by the stator case 122 '. The inner rotor 112 of the rotary electric machine 110 is fixed to the end of the crankshaft 27 on the side opposite to the transmission means 17.
Penetrates the stator case 122 'rotatably. Thus, between the crankshaft 27 and the stator case 122 ', the ball bearing 175 and the annular seal member 1 are provided.
23 are provided.

Thus, the first ball bearing 29 is provided between the crankshaft 27 and the left crankcase 28L, and the crankshaft 27 and the right crankcase 28R
Since the second ball bearing 30 is provided therebetween and the ball bearing 175 is provided between the crankshaft 27 and the stator case 122 ', the crankshaft 27 is rotatably supported at three axially spaced locations. As a result, it is possible to suppress a relatively long run-out of the crankshaft 27 caused by being connected to the starting and generating device 18 '. This makes it possible to reliably prevent the inner rotor 112 and the outer stator 113 from interfering with the rotational shake of the crankshaft 27 in the rotating electric machine 110 of the starting and generating device 18 ′.

In the storage chamber 51 ', the crankshaft 27
Drive sprocket 49 and second ball bearing 3
The drive gear 55 is fixed between zero. On the other hand, an oil pump 176 is provided on the inner side of the left crankcase 28L, and the rotation shaft 177 of the oil pump 176 penetrates the right crankcase 28R in a freely rotatable manner.
1 '. A bowl-shaped rotating member 178 is fixed to the end of the rotating shaft 177 in the storage chamber 51 ′, and a driven gear 179 fixed to the outer periphery of the rotating member 178 is connected to the drive gear 55. Be engaged. Moreover, the water pump 18 driven in conjunction with the oil pump 176
0 faces the storage chamber 51 'so that the stator case 1
A part of the water pump 180 is covered with the rotating member 178.

The connecting rod 25 connected to the piston 23 is connected to a crank pin 26 provided between a pair of crank arms 27a, 27a of the crank shaft 27.
The first ball bearing 29 is connected to the crankpin 26 through a roller bearing 181.
A passage 182 having a bottom and opened to the side is provided coaxially, and a passage 183 having an inner end opened and an outer end opened to the outer surface of the crankpin 26 is provided in the passage 182. Those passages 18
Oil is supplied via 2,183.

Thus, of the two crank arms 27a, 27a, the crank arm 2 on the first ball bearing 29 side is used.
A ring member 185 forming an oil reservoir 184 with the crank arm 27a is attached to a surface of the first ball bearing 29a of the first ball bearing 29a so that an inner peripheral edge thereof corresponds to an open end of the passage 182. . On the other hand, on the inner surface of the left crankcase 28L, a ring-shaped guide member 186 having a cylindrical protrusion 186a protruding inward of the ring member 185 on the inner peripheral edge is formed. Thus, both left and right crankcases 28L, 2
Oil scattered in the crank chamber 187 formed between the 8Rs is guided between the guide member 186 and the ring member 185 toward the open end of the passage 182, and a part of the oil is centrifuged by the rotation of the crankshaft 27. The oil is accumulated in the oil sump 184 by the action of the force.

The rotating electric machine 110 in the starting and generating device 18 'is controlled in the same manner as in the first and second embodiments.

According to the third embodiment, the starting and generating device 18 'is different from the first and second embodiments in that the right rear wheel WRR is used.
The engine E '.
However, the effect of preventing interference between the starter / generator 18 and the right rear wheel WRR by avoiding a design change according to the type of the vehicle and extending the wheel base cannot be obtained.
By being connected to the end of the crankshaft 27 on the side opposite to the transmission means 17, the rotating electric machine 110 does not adversely affect the swing performance of the power unit P which is a hybrid type, and the riding of the tricycle is prevented. Comfort and steering stability can be improved.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

For example, in the above embodiment, in the power generation control mode, the charging voltage of the battery 128 is adjusted by the duty ratio. However, a configuration using a conventional regulator may be adopted.
, 169 ... can be used as a three-phase rectifier.

In the above embodiment, the outer stator 1
13, the starting torque at the start of the engine E, the assist torque at the start of the vehicle, and the generated voltage are obtained by the coil 121. However, the starting torque, the assist torque, and the generated voltage are obtained by different coils. Alternatively, the same coil may be provided with an intermediate tap to be used for a starting torque, an assist torque, and a generated voltage.

[0105]

As described above, according to the first aspect of the present invention, the outer edges of both ends of the weight roller can contact the inner side surface of the accommodation recess to make it slippery, and the operation failure due to the lock of the weight roller occurs. Can be prevented as much as possible.

According to the second aspect of the present invention, the gap between the inner surfaces of the weight roller and the housing recess is lubricated by the lubricant, so that the occurrence of malfunction due to the lock of the weight roller is more effectively prevented. can do.

According to the third aspect of the present invention, the housing recess is sealed without using any special parts other than the pulsar rotor, and dust is prevented from entering the lubricant from the outside, so that a good lubrication state is obtained. Can be maintained.

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type motorcycle according to a first embodiment.

FIG. 2 is a sectional view of the power unit taken along line 2-2 of FIG.

FIG. 3 is an enlarged sectional view showing the engine and the compressor of FIG. 2;

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a diagram showing opening and closing timings of an intake valve, an exhaust valve, and a supercharging valve.

FIG. 6 is an enlarged cross-sectional view of the starting and power generation device of FIG. 2;

FIG. 7 is a circuit diagram showing a configuration of an electric circuit related to a commutator of the rotating electric machine.

FIG. 8 is a circuit diagram showing a connection state of a commutator and each brush.

FIG. 9 is an enlarged sectional view taken along line 9-9 of FIG. 6;

FIG. 10 is a diagram illustrating a state in which a weight roller is inclined in a storage recess.

FIG. 11 is a diagram showing a control system of the engine and the rotating electric machine.

FIG. 12 is a diagram showing a throttle opening, a crankshaft rotation speed, and an output torque of a crankshaft at the time of engine start over time.

FIG. 13 is a diagram showing a relationship between a motor output when an assist torque is applied, an engine speed, and a throttle opening.

FIG. 14 is a diagram showing a throttle opening, a crankshaft rotational speed, and an output torque of the crankshaft when an assist torque is applied, as time elapses.

FIG. 15 is a circuit diagram corresponding to FIG. 7 of the second embodiment.

FIG. 16 is a sectional view corresponding to FIG. 2 of the power unit of the third embodiment.

FIG. 17 is an enlarged view of a main part of FIG. 16;

[Explanation of symbols]

 18, 18 'starter / generator 27 crankshaft 110 rotating electric machine 111 centrifugal governor 140 rotating body 141 moving body 146 housing recess 142 Weight roller 142a Arc part 150 Grease as lubricant 151 Pulser rotor E, E 'Engine

Claims (3)

[Claims] 1. A crankshaft (2) for an engine (E, E ').
(7) a rotating body (140) fixed to the rotating body (140), wherein the rotation about the axis of the crankshaft (27) is disabled and the crankshaft (27) is allowed to move in the axial direction; (141), a rotating body (140), and a moving body (14)
A plurality of housing recesses (146) provided at a plurality of locations spaced apart in one circumferential direction of the opposing surface of (1) are interposed between the rotating body (140) and the moving body (141). A weight roller (142), and the weight roller (14) according to rotation of the crankshaft (27).
A centrifugal governor (111) for moving the moving body (141) away from the rotating body (140) in response to an increase in centrifugal force acting on 2); and between the rotating body (140) and the moving body (141). When the distance between the rotating body (140) and the moving body (141) is large, the crankshaft (2) functions as a motor that can apply a starting torque to the crankshaft (27) when the spacing is small.
And a rotating electric machine (110) that is switched in accordance with the operation of the centrifugal governor (111) in a state that functions as a generator driven in 7). An engine starting and power generation device characterized in that an arc portion (142a) having an arc-shaped vertical cross section bulging outward is formed around the entire outer periphery of both ends of the engine. 2. A lubricant (1) is provided in each of said housing recesses (146).
The engine starting and power generation device according to claim 1, characterized in that (50) is charged. 3. A pulsar rotor for detecting an engine speed, wherein each of the recesses (146) covers the rotating body (140) and the moving body (141) and is fixed to an outer end of the crankshaft (27). The engine starting and power generation device according to claim 1 or 2, wherein the device is substantially sealed at (151).