JP2012215234A5 - - Google Patents

Description

According to the first aspect of the present invention, a plurality of control valve side supply oil passages that form a control oil supply oil passage together with a plurality of cover side supply oil passages and that cross each other include a cover member and a plurality of hydraulic control valves. Since the control valve side supply oil passage is shifted between the one surface side and the other surface side of the partition member, the control valve side supply oil passage is changed. Since it is easy to cross and the partition member only needs to be very thin, it is possible to cross a plurality of control valve side supply oil passages without increasing the thickness of the cover member, thereby avoiding an increase in the size of the internal combustion engine. can do.

1 is a side view of a motorcycle. It is the side view which looked at the engine main body from the same direction as FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged view of a portion indicated by an arrow 4 in FIG. 3. It is sectional drawing which shows an oil pump unit and an oil strainer along the 5-5 line of FIG. 2 and FIG. FIG. 6 is a view taken along arrow 6 in FIG. 5 . It is the figure which looked at the oil pump unit from the 7-7 line arrow of FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 5. FIG. 9 is a cross-sectional view taken along line 9-9 in FIGS. 6 and 8. FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. 6. It is a figure which shows the structure of an oil supply system. FIG. 3 is an enlarged view of a main part of FIG. 2. FIG. 13 is a sectional view taken along line 13-13 of FIG. FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. FIG. 15 is a cross-sectional view taken along line 15-15 in FIG. 12. FIG. 16 is a view on arrow 16 in FIGS. 14 and 15. It is a figure which shows the surface which faces the partition member of a support holder so that a communication part with the hole of a partition member may be shaded. It is the side view which looked at the partition member from the clutch cover side. It is a figure which shows arrangement | positioning of the control valve side supply oil path seeing from the outer surface side of a clutch cover. It is 20 arrow line view of FIG.

In FIG. 4, a transmission cylinder shaft 75 that is adjacent to the second main shaft 61 in the axial direction is attached to an intermediate portion near the other end of the first main shaft 60 so as to be relatively rotatable with a constant axial position. The first hydraulic clutch 71 is provided on the first main shaft 60 so that the power disconnection / connection between the transmission cylinder shaft 75 and the first main shaft 60 can be switched, and the second hydraulic clutch 72 includes the transmission cylinder shaft 75 and the first main shaft 60. Provided on the transmission cylinder shaft 75 and the second main shaft 61 so that the power disconnection / connection between the second main shafts 61 can be switched.

5 and 6, the oil pump unit 112 is composed of first and second oil pumps 115 and 116 having a common pump shaft 114 that rotates in conjunction with the rotation of the crankshaft 37. The pump casing 117 common to the first and second oil pumps 115 and 116 includes a pump body 118 as a first case member, a pump cover 119 as a second case member, and between the pump body 118 and the pump cover 119. The pump casing 117 is configured by fastening a plurality of, for example, three bolts 121, 121, 121 with the pump body 118, the plate 120, and the pump cover 119. pump casing 11 7, the pump body 118 Is attached to the crankcase 38 by a plurality for example, three bolts 122,122,122 as allowed to abut against the right side wall lower portion of the lower case half 4 4 in the crankcase 38.

Meanwhile the crankcase 38 lower case half 4 4 is rotatable balancer shaft 123 having an axis parallel to the crankshaft 37 by interposing the ball bearings 124 and 125 between the lower case half 4 4 The balancer shaft 123 is connected to the pump shaft 114 coaxially and in a relatively non-rotatable manner.

Incidentally, the balancer shaft 123 is provided with balance weights 136 and 137 individually corresponding to the pair of cylinder bores 45 in the cylinder block 39. Of the balance weights 136 and 137, the balance weight 137 on the pump unit 112 side and , the lower case half 4 4 of the crankcase 38 between the pump casing 117 has an open one end of the connecting tube portion 113a of the oil strainer 113 is provided so as to allowed to fit from below liquid-tight downward The connecting passage 138 is provided.

Referring also to FIGS. 7 and 8, wherein the pump body 118 of the pump casing 117 are common inlet 139 is provided in the first and second oil pumps 115 and 116, the intake port 13 9 Is connected to the other end of the connection passage 138 in a liquid-tight manner. That is, the suction port 139 extends in a direction along the axis of the balancer shaft 123 so that the connection portion with the oil strainer 113 is located between the balance weight 137 provided on the balancer shaft 123 and the pump casing 117. It opens toward the inside of the engine body 32.

Referring also to FIG. 9, a first discharge passage 145 of the first oil pump 115 is formed in the pump casing 117 so as to communicate with the oil passage 146 on the crankcase 38 side. A first relief valve 147 connected to the discharge passage 145 is attached to the pump body 118 adjacent to the plate 120.

The outer end of the relief valve housing hole 148 has a plug member 156 is screwed so as to clamp between the inner end wall 148a of the valve housing 151 of the relief valve housing hole 148, the relief valve The inner end wall 148 a of the accommodation hole 148 is provided with a communication hole 157 that allows the inlet 149 to communicate with the first discharge path 145.

The outer end of the relief valve housing hole 16 4 is plug member 171 is screwed so as to clamp between the inner end wall 16 4 a of the valve housing 167 the relief valve housing hole 16 4 communication hole 1 7 2 giving through the inlet 165 to the second discharge passage 161 is provided at the inner end wall 16 4 a of the relief valve housing hole 16 4.

Moreover the said plate 120 side of the pump cover 119 and communicating hole 17 3 is provided communicating with the outlet 166, 166 ..., to the plate 120, providing communication with the communication hole 17 3 in the second suction passage 144 the communication hole 17 4 is provided. That is, the oil discharged from the second relief valve 163 is guided to the second suction path 144.

12 and 13, the filter case 181 of the second oil filter 1 78, a bottomed cylindrical case main portion 182 which is formed integrally with the clutch cover 58, in the case main portion 182, for example a pair The filter member 183 is a cylindrical member formed by a lid member 183 coupled by bolts 184 and 184, and a filter medium 185 formed in a ring shape is inserted and held in the filter case 181, and the outer periphery of the filter medium 185 is An unpurified chamber 186 is formed between the filter case 181 and a purifying chamber 187 is formed in the filter medium 185.

That is, a surface facing the partition member 201 of the clutch cover 58, a groove 226 communicating with the outlet hole 207 of the support holder 200 through the through hole 2 20 of the partition member 201 is provided, the groove 226 in the partition member 201 It leads to the through hole 228 provided. In addition, a groove 227 having one end communicating with the through hole 228 is provided on the surface of the support holder 200 facing the partition member 201, and a through hole 229 communicating with the other end of the groove 227 is provided in the partition member 201. The hole 229 communicates with the first cover side control supply oil passage 203a.

Also, first and second clutch hydraulic sensors 235, respectively, at the ends of the first and second control valve side supply oil passages 203b, 204b opposite to the first and second cover side supply oil passages 203a, 204a. 236 are disposed, and the first and second clutch hydraulic sensors 235 and 236 are disposed close to each other in parallel while directing their axes in the front-rear direction when the engine body 32 is mounted on the motorcycle. The clutch cover 58 of the engine body 32 is disposed.

The clutch cover 58 is provided with a second oil filter 178 having a cylindrical filter case 181. The second oil filter 178 includes first and second clutch hydraulic sensors 235 and 236. While the axis of the filter case 181 is arranged in a direction intersecting with the axis of the engine, the engine body 32 is mounted on the motorcycle and is shifted forward and backward from the first and second clutch hydraulic sensors 235 and 236 to the clutch cover 58. It is disposed.

Next, the operation of this embodiment will be described. The suction port 139 common to the first and second oil pumps 115 and 116 is connected to the first suction port 141 of the first suction passage 143 that is connected to the first oil pump 115, and A partition wall 140 divides the second oil pump 116 into the second suction port 142 of the second suction passage 144 independent of the first suction passage 143, and allows the first and second relief valves 147 and 163 to be released. since the outlet 150, 166 is connected to the second suction passage 144 of the second oil pump 116 side, oil discharged from the first relief valve 147 of the first oil pump 11 5 also to cause sucked by the second oil pump 116 to, even if the circulation circuit of the oil in the second oil pump 116 side is configured, overflow from the circulation circuit to the suction path side of the first oil pump 11 5 By reducing the amount of oil drawn into the second oil pump 116 side, the influence of air can be prevented from occurring on the second oil pump 116 side when the oil is a mixture of air. The enlargement of the first oil pump 115 can be prevented.

Further, by the outer end of the filter case 181 to the outside of the outer end of the OIL filter hydraulic pressure sensor 191 along the axial direction of the filter case 181 is disposed, the outer end of the filter case 181 when the motorcycle falls down Thus, the oil filter hydraulic sensor 191 can be protected.

The first and second clutch hydraulic sensors 235 and 236 and the oil filter hydraulic sensor 191 are arranged at the front lower portion of the side surface of the engine main body 32, and are positioned rearward as the front lower portion of the engine main body 32 goes downward. In order to attach the lowermost first clutch hydraulic sensor 235 to the engine body 32 among the first clutch hydraulic sensor 235, the second clutch hydraulic sensor 236, and the oil filter hydraulic sensor 191. The mounting boss 245 is disposed at a position shifted rearward from the mounting bosses 246 and 247 for mounting the remaining hydraulic pressure sensors 236 and 191 to the engine body 32, so that the first clutch is moved forward from the lower portion of the engine body 32. A part of the hydraulic pressure sensor 235 can be prevented from protruding.

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