TW466299B - Oil recovery system for a two-cycle engine - Google Patents

Abstract

To provide an oil recovery system for a two-cycle engine, in which an oil recovery chamber communicated to a bottom of a crank chamber of a two-cycle engine is connected to an intake system of the two-cycle engine via a return pipe line, characterized by certainly preventing the occurrence of white smoke even by a snapping operation directly after start-up of the engine, and also improving the engine recovery performance while avoiding the degradation of the engine performance due to a pressure loss in the crank chamber. The return of oil from an oil recovery chamber 75 to an intake system 38 is prohibited by a control valve 103 until the engine state reaches a specific warming state directly after start-up of a two-cycle engine. An oil recovery tank 76 is provided with a partition wall 83 for partitioning the inside of an oil recovery chamber 75 into an upper chamber 75a communicated to the bottom of the crank chamber 33 and a lower chamber 75b connected to the intake system 38. The partition wall 83 is formed into a funnel shape which allows the flow area of oil to be reduced toward the lower side. A communication hole 84 for communicating the upper chamber 75a to the lower chamber 75b is provided at the lowermost end of the partition wall 83.

Description

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V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to the lubricating oil blowback & β-path and the two-stroke engine suction system connected to the bottom of the crank chamber provided in the two-stroke engine or the automatic two. The connected two rows are restored to the 'receiving device via the return tube'. Engine-stroke engines learn the technology from the return pipe lubricating oil, such as 'In Japanese Patent Laid-Open No. 5-1 7 9 9 2 0 Koki λ Zhou Zhi', in the two-stroke engine, it has already slipped with the mixed gas Zhao ^, etc. The oil and the lubricating oil from the lubricating oil supplied to the lubricating part through the oil supply pipe are accumulated, and the bottom of the crank chamber is recovered by suction negative pressure. Β′Β will write the lubricating oil in the crank chamber and return it to the suction system It is a known technique. θ m machine [Problems to be solved by the invention] However, in the cold state immediately after startup, the two-stroke 5 丨 engine is still at a low temperature and the heat generation is very low, and the lubricating oil that has returned to the suction system cannot be completely Combustion, which may cause the white smoke to be discharged together with the exhaust gas. In the case disclosed in the above-mentioned conventional publication, the return line is connected to the throttle of the intake system on the upper side. Due to the low suction negative pressure, the return of lubricating oil from the check valve to the suction system is prevented, thereby preventing the occurrence of white smoke. However, when the two-stroke engine is operated immediately after it is started, in the conventional device described above, the lubricating oil is returned to the suction system to generate white smoke. The present invention was developed in view of the above situation, and its first object is to provide a two-stroke engine oil recovery device that can prevent white smoke from being generated even when the vehicle is operated at a rapid speed immediately after starting.

46 629 9 V. Description of the invention (2) Back to: 2 In the conventional two-stroke engine, ‘the negative pressure of the suction causes the lubricating oil W to generate pressure loss in the crank chamber I, which in turn may cause‘ ΓΞ :: ΐ. There is also 'the pressure arteries of the crank chamber, and the vibration from the road surface or the vibration of the engine during riding, == the oil recovery chamber flows back to the crank chamber', which will also cause a decrease in the recovery performance of the lubricant. -IIΠϊComplete the development of the above situation, the second purpose is to provide a lubricant recovery device f to avoid Hi-stroke engines.

2 = Pressure loss in the chamber incurred by engine performance and recovery performance of the lubricating oil. ΐ 4 K [Means of Solving Problems] and ΐΐ ΐΐ: 1 Presentation: 'Application ^ Patent Scope No. 1 Invention' The department, through the production technology: 2: Lubrication oil recovery engine connecting the handle to the bottom The oil recovery device 4, which is characterized by the two-stroke lead engine = ^ immediately after it is started until it reaches the specified level, is in the second row from the above-mentioned lubricant recovery chamber to the above-mentioned engine. Patent application scope 1: Lubricant recirculation. Just after starting the two-stroke engine until it reaches the structure of Tuming, it can be known that the control valve is used to prevent the above-mentioned lubricating oil; until the manifold state, due to the backflow of the gas system, even if the two-stroke engine is at the above-mentioned lubricant recovery The room is sucked immediately for quick operation, and the lubricating oil will not be cut to the prescribed warm-up state to prevent white smoke. ° In the inspiratory system, it can be confirmed that the invention in the second scope of the patent application is the first scope in the patent application.

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89] 23572.ptd Page 8 46 629 9 V. Explanation of the invention (3) The structure of the invention is characterized in that the control valve is a first nozzle connected to the lubricating oil recovery chamber. The above-mentioned suction system is connected to one of the second and third nozzles to switch the electromagnetic conversion valve to communicate with one of them; the open pipe has one end connected to the third nozzle and is placed on the control valve The upper end is open to the air. According to this structure, the first and third nozzles are blocked, and the first and third nozzles are connected to prevent the backflow of the suction system to the lubricating oil. By closing the lubricant recovery chamber, the lubricant from the crank chamber toward the lubricant recovery chamber can be recovered well. Also, since the open pipe communicating with the third nozzle is placed above the control valve, it can be avoided. Open the flow of lubricant on the tube side. The invention in the third scope of the patent application is a structure in which the invention in the first scope of the patent application is added, characterized in that the lubricant recovery chamber is connected to the throttle valve and the pilot valve through a return line. Inspiratory system, according to this structure, to prevent the lubricating oil returning to the intake system from adhering to the throttle valve, while improving the operability of the throttle valve, the supply of the crank chamber is promoted by the operation of the pilot valve. Atomization of the return lubricating oil on the side further improves the flammability of the lubricating oil, which can further effectively prevent the generation of white smoke. The invention in the fourth scope of the patent application is a structure in which the invention in the first scope of the patent application is added, characterized in that the prescribed warm-up state is a catalyst mechanism provided on the exhaust system of the two-stroke engine. If the catalyst is in an activated state, according to this structure, it is possible to prevent the lubricant from adhering to the catalyst and accelerate the activation of the catalyst, thereby further effectively preventing the generation of white smoke. In order to achieve the above-mentioned second object, the fifth invention of the patent application is applied to a crank chamber provided in a two-stroke engine mounted on a motorcycle.

89123572.ptd Page 9 4 b b 2 9 9 5 Description of the invention (4) The lower part is formed from the upper part of the lubricant recovery chamber which is confused with the upper part 6 above. The recovery chamber is the same as the above-mentioned guide. In the lubricating oil recovery box, the above lubricating oil is returned to the original installation i. The two-stroke engine connected to the lubricating oil recovery chamber is spaced up and down. The lubricating oil recovery box is provided with a lubricating oil chamber: The upper and lower chambers are the upper one, the diaphragm wall, which is connected to the lower part and the lower part, and connected to the funnel-shaped reduction of the suction system. I forms the communication hole of the lubricating oil flow area. The bottom of the partition wall is provided with a structure that connects the upper chamber and the lower π: 捸. From the crank :: ', the lubricant introduced into the lubricant recovery chamber from the upper chamber is connected to the lower chamber. Of the composition. Moreover, the diameter makes it possible to set the pressure of the handle chamber with a smaller value as the negative M1 of the suction; when the r is negative 1 k, the lubricating oil returns to the suction side to suppress the loss of the limit force nr. For the lower limit, the lower the set, the larger the crank palace to prevent the engine performance. The "through surface" can improve the passage between the oil recovery chamber of the crank chamber by the pressure artery of the crank chamber, and by the riding chamber. Oil recovery: In addition, the vibration of the engine can be suppressed from the lubricating oil recovery chamber by the vibration from the road surface at the time t or induced at the partition wall and the communication hole: the amount of oil in the lake on the crank chamber side. performance. 〖Take a small limit, which can further improve the lubrication of the invention of the 6th in the scope of the patent application, plus the invention structure of the patent application Fanchu i, in which the use of the side landing frame caused the pile 5 μ The oblique state constitutes the lowermost position, connecting the-end of the lubricating oil pipe to the bottom of the crank chamber, and the other end of the lubricating oil pipe is connected to

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629 9 V. Description of the invention (5) The above upper chambers are connected. According to this structure, in the tilted state of the vehicle body using the side-ground support, the lubricating oil originating from the crank chamber can be effectively recovered by using the tilting of the vehicle body. [Embodiments of the invention] The following appended drawings will be used to explain one embodiment of the present invention. Figures 1 to 7 show an embodiment of the present invention, Figure i is a side view of a motorcycle; Figure 2 is a partially cut-away side view of a two-stroke engine '• Figure 3 is the use of a side landing support An enlarged cross-sectional view of the state along line 3-3 of Fig. 2; Fig. 4 shows a longitudinal section side view with a part of the exhaust system cut out; Fig. 5 is an enlarged cross-sectional view of line 5-5 of Fig. 3; A partially cut-away side view of the lubricant recovery tank; FIG. 7 is a front view cut away from the direction of arrow 7 in FIG. 6. First, in FIG. 1, a front end of the main frame 11 provided in the frame F of the motorcycle is provided with a front head that can operatively support the front fork 12. The tube 1 3 is at the lower end of the front fork 12. At the front wheel WF, the upper end of the front fork 12 is connected to the operating handle 14 and the left and right extending right and left-the front ends of the pair of seat rails 15 ... are connected to the middle part of the main frame 11 ' The front ends of the pair of left and right seat stays 16, which are located at a lower position and extend rearward and upward, are connected to the rear end of the main frame 11. At the front of the main frame 丨 1 and the front of the two-seat rails 15 ... a fuel tank 17 'is supported above the two-seat levers 15 ... — The main frame 11 above the fuel tank 17 is equipped with a two-stroke guide E. The rear portion of the main frame 11 supports a front extending rearward.

89123572.ptd Page 11 46629 9 V. Description of the invention (6) The rear end can swing and the rear wheel is 19 '. At the rear end of the rear fork 19, the shaft is supported by the output of the engine E to drive its rotation. The rear wheel WR and the buffer unit 20 are disposed between the seat brace 16 and the rear wheel 19. At the lower end of the rear portion of the main frame 11 described above, a side landing support frame 21 is rotatable between a use position and a storage position. As shown in FIG. 1, the side landing gift frame 21 in the use position is opposite to the road surface. At the time of contact, the body of the motorcycle was inclined to the left in a state facing forward in the riding direction. In FIGS. 2 and 3, the two-stroke engine E includes a cylinder section 22, a cylinder head 23 combined with the cylinder section 22, and a crank case 24 combined with the cylinder section 22; The cylinder hole 25 of 22 is fitted with a slidable piston 26 which is connected to a crank shaft 28 which is rotatably supported on the crank case 24 via a connecting rod 29 and a crank pin 30. A combustion chamber 31 is formed between the cylinder portion 22 and the cylinder head 23 at the top of the piston 26, and a spark plug 32A is inserted into the cylinder head 23 at the center of the combustion chamber 31. Also, the crankshaft formed in the crankshaft box 24 is provided with a scavenging port that communicates with the combustion chamber 31 as the piston 26 descends ... It is provided at the cylinder portion 22 and the crankshaft box 24, and will follow the piston An exhaust port 35 communicating with the combustion chamber 31 at the lower part of 26 is provided in the cylinder section 22, and an intake port 36 is provided in the crank chamber 24 for opening the crank chamber 33. In the face shank box 24, a pilot valve 3 'disposed in the suction port 36 is mounted. The valve 37 is connected to the suction system 38 in the crank chamber 33 and connected to the suction guide. The suction system 38 is provided with a net gas_phase having a net gas material 39 therein, and a throttling_ gasifier 仏 connected to the gas purifier 40 and a flail

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7. Description of the invention (7) The suction pipe 43 between the carburetor 42 and the suction port 36, and the suction pipe pilot valve 3 7 together with a plurality of screw inspections 4 4… fastened to the crank wheel * downstream and upward The lower end of the extended branch pipe 45 is connected to the suction pipe 24. Further, an upper end of the branch pipe 45 is connected to an intermediate portion for reducing an intake noise dragon. Furthermore, an exhaust system 47 which is fast connected to the exhaust port 35 is provided with an empty chamber 46. _ From the lower side of the two-stroke engine E to the right side of the rear wheel M, the mouth 35 is passed through 48, and the exhaust pipe of the exhaust silencer connected to the downstream end of the exhaust pipe 48 is shown in FIG. The exhaust pipe 48 is hidden inside 9. 50, the catalyst mechanism 50, which is through the inner surface of the exhaust pipe 48, the catalyst mechanism parts 52 .. • The surface of the synthetic tube 51 fixed by the catalyst I several ladies together refer to Figure 5 'Crank One end of the shaft 28 is the one protruding from the curve. The isolated transmission case 5 3 is formed by a crank case 3 and a transmission case 5 4 combined with the crank shaft case 2 4. The lubricating-speed engine room up to the liquid level L shown in FIG. 5 is located in the transmission room 53, and a plurality of transmissions 57 are accommodated therein. Running on the axis of the crank shaft 28 and supported by the speed change case 54 is rotatably provided with a pan shaft 55 and a main rotatable reversible shaft 56 that is parallel to the axis of the main shaft 55 and is dragged by a speed change μ r, It is provided with an optional gear train and a gear train; and the reverse end 5 6 protruding from the transmission case 5 4 is transmitted through the drive chain 5 8 (refer to FIG. 1) to the rear wheel WR. There is also a driving gear 59 'fixed to one end of the crank shaft 28. The power train is transmitted from the engine 59 to the main shaft 55. Hidden moving gear 逑 Crank chamber Room 60. On the other side, at the other end of the crank shaft 28, it protrudes to the auxiliary machine room 60, which is isolated from the upper 33 and the transmission room 53. At this auxiliary machine,

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5. Description of the invention (8) For example, a generator connected to the other end of the crank shaft 28. A first oil seal member 61 is provided between the crank chamber 33 and the transmission chamber 53 and between the crank shaft 28 and the crank case 24. The first oil seal member 61 is disposed closer to the transmission chamber 5 and 3 sides than the first oil seal member 61. Of the first ball bearing 6 2 A second oil seal member 63 is provided between the crank chamber 33 and the auxiliary engine room 60, and between the crank shaft 28 and the crank shaft box ^, and closer to the machine room 6 than the second oil seal member 63. While the third oil seal member 64 is disposed on the 0 side, a second ball bearing 65 is disposed between the second and third oil members 63 and 64. 'Between the second and third oil seal members 63 and 64, an oil seal space 66 is formed in the crank shaft ㈣. In the oil-sealed space 66, the driving helical gear 6 ^ is driven on the crank shaft 28 'and the following helical gear 68 having an axis orthogonal to the axis of the crank shaft 28 is engaged with the driving helical gear 67. It is considered that the 68 series is connected with the unlubricated lubricating oil system, and the lubricating shaft 28 is driven. The v. Gears 69, which are part of the above-mentioned speed changer 57 by Qu Zhi, are connected to the crankshaft box 24: change the face of the machine room 53 so that the lights are turned near the outer periphery in the direction indicated by the arrow mark # 'And with the lubricating oil in this 53. Another-aspect 1 The oil receiving section 70 = the box 24 is integrally provided in the above-mentioned variable gear 6g buckle:,:, the inside; the lubricating oil receiving section 70 can pull X out to a part of the transmission room 53 Full of oil. After receiving the extraction from the above-mentioned transmission gear 69, there are holes 7 2 at the same time as the transmission and the lubricant discharge crank case 2 4 and the chamber 5 3 at the same time. The opening is in the oil seal hole 7 1 ′, and one end thereof is tied to the oil seal space 6 6;

Ο 2 9 9 V. Description of the invention (9) The other end is opened at the bottom of the transmission chamber 53; the lubricant supply hole 71 is the lower edge of the opening at one end and the upper part of the lubricant receiving portion 70. Formed for connection-body shape. 'But' the lubricating oil supply hole 71 'is provided with the axis parallel to the bolt 44 ... screwed in to fasten the pilot valve 37 to the crankshaft box 24, and is provided on the crankshaft box 24; One end of the lubricating oil supply hole 71 is spaced apart from each other by an opening portion provided on the crank case 24 and closed by a blocking member 73. Further, the opening portion provided on the crank case 24 at an interval from the other end opening portion of the lubricating oil discharge hole 72 is also closed by a blocking member 74. 'Also, the other end of the lubricating oil supply hole 71 is opened to the oil seal space 66 between the second oil seal member 63 and the second ball bearing 65; the end of the lubricating oil discharge hole 72 is attached to the third oil seal member The space between 64 and the second ball bearing 65 is opened to the oil seal space 66. That is, the other end of the lubricating oil supply hole 71 is combined with one end of the lubricating oil discharge hole 72, and the second ball bearing 65 is held in a position where the second ball bearing 65 is held to each other so as to open to the oil seal space 66. However, in the two-stroke engine E, the lubricating oil supplied with the mixed gas and the lubricating oil supplied by the lubricating part of the engine E are accumulated in the bottom of the crank chamber 33, and the accumulation is recovered from the crank chamber 33. The lubricating oil 0 flows back to the suction system 38 ′. Below the two-stroke engine E, a lubricating oil recovery tank 76 is provided. The full lubricating oil recovery tank 76 includes a base lubricating oil recovery chamber 7 communicating with the crank chamber 33. 5. -Referring to Fig. 6 together, the lubricating oil recovery box 76 'is composed of a box body 77, and a plurality of bolts 79, 79, ... are fastened to the side cover plate 78 of the box body 77. In addition, the box 77 is integrally provided with two supports extending upward.

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V. Description of the invention α〇) "-Π two holders, 81 are fastened to the two-stroke engine E 2: shank phase 24. That is, the lubricating oil recovery tank 7 is located below the primer supported by the engine E. An opening is formed by sealing the opening plate 78 provided in the circular concave portion of the box body 77. The concave sealing member 82 is enclosed between the box body 77 and the cover plate 78. By. ° · 8:: t Γ closing chamber 75 ′ is divided into two chambers of an upper chamber 75a and a lower chamber 75b by partitions 83 provided in the box 77. In addition, a funnel shape in which the lubricating oil circulation area gradually decreases below the partition wall s3, = ϊ Ϊ t is formed. At the lower end of the "3", a communication hole 8 > 4 connecting the upper chamber 75a and the lower chamber 75b is provided, and the vehicle of the two-wheeled vehicle is parked when the side-surface floor support 2 is in the use state. As shown in FIG. 3, the body is inclined laterally at an angle of α from the vertical direction. In this inclined state, the communication hole 84 is located at the lowermost position of the partition wall 83. The communication hole 8 4 is, for example, an upper wall 83 between the end portions located on the cover plate 7 8 side. In addition, in the crank arm box 24, the lowermost position is formed by the vehicle body being inclined when the floor frame 2 is used from the side, and a connecting pipe 85 passing through the bottom of the crank chamber 33 is installed. The other end of the lubricating oil duct 86 connected to one end of the connection pipe 85 is connected to the upper chamber 75a. 7 and referring to FIG. 7, the cover 88 of the lubricating oil recovery tank 76, the cover 88 holding the partition plate 87 between the housing 77 and the housing 77 is fastened by, for example, four bolts 89, 89... solid. An inlet chamber 91 ′ communicating with the lower chamber 7 5 b of the lubricant oil recovery chamber 75 is formed between the box 77 and the partition plate 87 through a passage 9 0 ′ provided in the cypress body 7 7. The exit chamber is formed between the covers 8 and 8.

89123572.ptd Page 16 46 629 9 Five 'Invention Note (11)' 92. A sealing material 93 surrounding the entrance chamber 91 is interposed between the box 77 and the partition plate 87, and a sealing material 94 surrounding the exit-chamber 92 is inserted between the partition plate 87 and the cover 88. · A check valve g 5 is arranged on the upper part of the partition plate 87. The check valve 9 5 is provided with a holding cylinder 97 'which is press-fitted between the inlet chamber 91 and the outlet chamber 92 and is installed on the upper part of the partition plate 87. The hole 96 and the disc-shaped valve body 98 are accommodated in the holding cylinder 97. The holding cylinder 9? Having a bottomed cylindrical shape is a valve hole 99 provided in the center of the bottom end of the holding cylinder 97 with its bottom end arranged at the inlet to the 9 1 side and press-fitting the mounting hole 96 '. The valve body 98 ′ is installed on the bottom end of the holding cylinder 97 and is accommodated in the holding cylinder 97 so as to occlude the valve Zhao. At the opening end side of the holding cylinder 97, the valve body 9 8 is prevented from moving from the holding cylinder 9. A plurality of restricting convex portions 7 1 * 1 0 Oj ** are designed to protrude inwardly from the inner surface of the holding tube 9 7. With such a one-way valve 95, it is allowed to move from the inlet chamber g to the outlet chamber 92 side.

The passage of the adjusting oil prevents the circulation of the lubricant from the outlet chamber 92 to the inlet side. D # Pay particular attention to FIG. 2. At the portion corresponding to the one-way valve 95, a connection pipe is attached to the cover 88. 101, the connecting pipe 101 is connected to one end of the return pipe 102, and the other end of the return pipe 02 is connected to the suction system. In addition, a control valve 3 is provided in the middle of the return line 102. The control valve 103 has a first! The electromagnetic switching valves of the second, third, and third nozzles 104, 105, and 106 can connect the first nozzle 104 to the second nozzle 105, and at the same time, block the third nozzle 106. State, and at the same time that the j-th nozzle 1104 can be opened to the third nozzle 106, 'the 2nd nozzle 105 is blocked, such as

46 b29 9 V. Description of invention (12) This is converted. While controlling the first nozzle opening 1 04 of the wide tube 103, which constitutes a part of the return line, the one end of the tube is connected to the first connecting tube 101! The other end of the pipe 102a is connected; one end of the second pipe 102b that will work with the i-th pipe 102a to form a return pipe 102 is connected to the second pipe port 105; the second pipe 102b The other end is connected to the throttle valve 41 and the pilot valve 37 to 38, that is, connected to the suction pipe 43. In addition, the third pipe port 106 of the control valve 103 is connected to one end of an open pipe 107 positioned above the control valve 103, and the other end of the open pipe 107 is connected to a cleaner. The clean air material 39 in 40 is open to the air on the upper side. The control valve 103 is controlled by a control mechanism (not shown), and the two-stroke engine E is stopped immediately after the two-stroke engine E is started until it reaches a predetermined warm-up state and the two-stroke engine E is stopped. The return of the lubricating oil from the lubricating oil recovery chamber 75 to the suction system 38 causes the first nozzle 14 to be far away from the air nozzle 3 and the second nozzle 10 to be blocked. : Li = After the engine E reaches the predetermined warm-up state, the first nozzle 〖04 is connected to the second nozzle 105, and the third nozzle 106 is blocked. That is, in the second stroke During the period immediately after engine E is started until it reaches the predetermined warm-up state and the stopped state of the two-stroke engine E, the return line is blocked. The lubricant recovery chamber 75 is connected to The air heater 40 is connected. In addition, the predetermined warm-up state refers to a case where the catalyst of the catalyst mechanism 50 of the exhaust system 47 of the two-stroke engine E is set to the activated state.

89123572.ptd Page 18 4 b 629 9 V. Description of the invention (13) The activity of the catalyst is 彳 μ, a can be obtained by detecting the temperature in the catalyst mechanism 50, and t Λ ^ ΟΛ ^ The number of rotations of the two-stroke engine E is set to the number of rotations (for example, 300,000 rpm) η, and the time on L ^ Λ is continued to be the set time (for example, 1 minute) or more to determine the activity of the catalyst "磲Also possible. Next, ‘explain Guan u q q‘ set the role of this embodiment in the embodiment ’in the isolated crank chamber

33 and Auxiliary Room 6〇 Xi 0B You Dai? Between the crankshaft box 24 and the crankshaft 28, and between the crankshaft cylinder oil seal members 63 and 64, and between the oil seal members 63 and 64 and the oil seal space 66 provided in the C is housed. Within the oil seal space 66 '. The second ball bearing 65 between the crank case 24 and the crank shaft 28. In addition, for the gun data ... W ΛΑ, βΒ 'order the lubrication of the second ball bearing 65, above the transmission gear 69 which can be lubricated from the transmission to 5 d. 'Integrated with the crankshaft box 24 Qiu =, the household lubricating oil of the lake oil extracted by the transmission gear 69 bears U, MD 4: The vehicle box 24 is provided, and one opening is opened in the transmission room D d' The lower part of the opening t,,. Π ^ ν and the upper surface of the lubricating oil receiving part 7 〇 are integrally connected M, and „* 山 H0 ^ Α ,, 71. A ^ The opening is opened at Lubricant supply hole ii of the oil seal space 66, and a prostitute said. The mouth is on the transmission. ^ At the same time as the oil seal space 66, 'the other end is open at the same speed? The lubricating oil exhaust hole 72 at the bottom of the inside. A i & amp The lubricating oil extracted by the transmission gear 6 9 in the engine room 5 3, the part 70 is supplied to the oil seal space 66 through the lubricating oil supply hole 71, and the lubricant is returned from the oil seal space 66 to the oil seal space 66. # β? L71 ^ ^ ^. In addition, the crankshaft box 24 only needs to supply lubricating oil? And the full & oil exhaust hole 72 can be perforated. A lubricating iS n L dental work to ligation with the crank g ^ gp -p, compared, in order to avoid increasing the number of processing stations degenerate early configured to lubricate the second ball bearing 65.

4 6 629 9 V. Description of the invention (14) There is also the other end of the lubricating oil supply hole Π and the. End. Since the second ball car is held by each other, the bearing of the 65 :: bean exhaust hole 72 has an opening The oil in the oil seal space 66 must pass through the eight oil seal spaces 66 to circulate, so that the second ball bearing 65 can be confirmed. The second ball bearing 65 has a lubricating oil supply hole 7b. The handle 44 and the bolt 44 screwed into the crankshaft box 24 are the pilot valve 3. They are fastened to the crankshaft box 24. Since the two shafts can be leveled, the axis is provided with the lubricant supply hole. 71, the screw holes in the square from the same direction. The workability is good and its health can be improved: the wheel box 24 is perforated and added ^ Ξ ί: Ϊ 二 3! Ϊ́, the accumulated lubrication The oil is collected from the crank chamber 33 and is to be returned to the suction system 38. On the two sides, the lower culvert of each engine E with a lamp adjacent to the bottom of the crank chamber 33 is arranged for recovery; The chamber ^ f chamber 75 is separated into the upper chamber ... mesh and wall = wall_lubricating oil is connected to the bottom of the crank chamber 33 2 :: 乂, the upper chamber sucks μ soil. Β & 丨 者 ， And the lower chamber 75b, the connection area is gradually decreasing; ~ It is a funnel-like 4 = / as the lubricant flow is formed downward; and at the lower end of the partition 83, a communication # to 75a and the lower chamber are provided ^ The communication hole 84. The second connection is introduced into the lubricating oil recovery chamber 75 by :: / 33 to be lubricated > 'from the upper part into a bucket shape: 4 and introduced into the lower chamber 75b. Moreover, the partition wall 83 is shaped Suck The air checker can set the hole diameter of the communication hole 84 relatively small, so that the following pressure loss L causes the lubricating oil to return to the suction system 38 side and lower the crank chamber 33. == It is made to a small limit, which can prevent the engine The performance of the lower P father earth is also connected to the crank chamber 3 3 and the lubricant recovery chamber 7 5

〇29 9 V. Description of the invention (i5) The flow area of the connecting pipe 85 and the drip oil introduction pipe 86 can improve the recoverability of the lubricating oil from the crank chamber 33. In addition, the pressure pulsation of the crank chamber 33 and the vibration of the self-propelled road surface from the source or the vibration of the engine E are reversed from the lubricant recovery chamber 75 to the amount of lubricating oil on the side of the crank chamber 3 3 on the partition wall 8 3 The communication holes 8 and 4 are suppressed to a minimum, and the recovery performance of the lubricant can be improved. Furthermore, the bottom of the crank chamber, which constitutes the lowermost position due to the tilting of the vehicle body by the use of the side landing support 21, is connected to one end of the lubricating oil duct 86, and the other of the lubricating oil duct 86 is One end is connected to the above-mentioned upper chamber 75a. Therefore, in a tilted state of the vehicle body using the side landing support 21, the lubricating oil originating from the crank chamber 33 can be efficiently recovered by utilizing the tilt of the vehicle body. In addition, while the lubricating oil recovered in the lubricating oil recovery chamber 75 is introduced into the return line 10 of the suction system 38, immediately after the two-stroke engine E is started until it reaches a predetermined warm-up state, A control valve 103 is provided to prevent the lubricating oil from flowing back from the lubricating oil recovery chamber 75 to the suction system 38. Even if the two-stroke engine E reaches the warm-up state, the lubricating oil will not Backflow to the suction system 38 can prevent the generation of white smoke. Further, the 'control valve 103' is a first nozzle connected to the lubricating oil recovery chamber 75 via a check valve 95, and a second nozzle 105 and a third nozzle connected to the suction system 38. One of the nozzles 106 is switched to connect the electromagnetic switching valve with one of them; the open tube 107 is connected at one end to the third nozzle 106, and is placed at the other end above the control valve 103 Open to the air in the scrubber 40. Therefore, in a state where the first and second nozzles 104 and 105 are blocked and the first and third nozzles 104 and 106 are communicated with each other, the lubricant is prevented from flowing back to the suction system 38.

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f By setting the lake oil recovery chamber 75 to a closed state, it is possible to recover the lubricant from the lubricant recovery chamber to the lubricant recovery chamber 33 smoothly. In addition, since the open pipe 107 connected to the three nozzles 106 is placed horizontally above the control valve 103, the circulation of the lubricant can be avoided on the open pipe 107 side. There is a 闰 lube oil recovery chamber 75, which is connected to: the suction system 3 8 between the valve 41 and the pilot valve 3 7 via the return line 1 0 2 to prevent the lubricating oil from returning to the suction system. Attached to the throttle valve 41, so that the operation of the throttle valve 41 can be improved. At the same time, the operation of the pilot valve 37 can promote the atomization of the lubricating / bone oil supplied to the crank chamber 33 side check machine, thereby improving the lubricating oil. The flammability can further prevent the generation of white smoke. #And 'the warm-up state of the above regulation' is to set the catalyst of the catalyst mechanism 5 of the exhaust system 4 7 of the two-stroke engine E to an activated state, to prevent the oil from adhering to the catalyst. The medium can accelerate the activation of the catalyst, and can further effectively prevent the generation of white smoke. Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without changing the actual side of the invention described in the scope of the patent application. For example, "In the above-mentioned embodiment," the control valve 103 is provided in the middle of the return line 102, but the configuration in which the control valve is installed in the lubricating oil recovery tank 76 is also "nj". [Effect of the invention] According to the invention of the first patent claim, the two-stroke engine is started until it reaches the specified warm-up state, because the control valve is used to prevent the full lubricating oil from being recovered from the lubricating oil. Backflow of the chamber to the suction system,

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5. Description of the invention (17) Even if the two-stroke engine is operating, the lubricating oil will not be generated. # To the prescribed warm-up state is to return to the inhalation system, so performing a quick operation before the end can definitely prevent the production of white smoke. According to the application for patents, the invention of the 2nd road that has been impoverished in 9 s is preventing the runaway The return state of the suction system of the mountain, Pp. Also, l κ also, even if the lubricant recovery chamber is not closed, it can be well recovered from the crank chamber to the above-mentioned lubricant recovery chamber. Lubricant, and to avoid lubricant flow on the open tube side. According to the invention in the scope of patent application No. 3, to prevent the lubricating oil flowing back to the suction system from adhering to the throttle valve, and thus to improve the operability of the throttle valve, the operation of the pilot valve is promoted to promote the supply to the crank The atomization of the return lubricating oil on the chamber side further improves the flammability of the lubricating oil, which can further effectively prevent the generation of white smoke. In addition, according to the invention of item 4 of the scope of patent application, "the lubricant can be prevented from adhering to the catalyst and the activation of the catalyst can be accelerated." This can further effectively prevent the generation of white smoke. According to invention No. 5 in the scope of the patent application, "Suppression of the loss of sound power to the crank when the lubricating oil returns to the intake side due to the negative pressure of the intake air is suppressed to a minimum, and the engine performance is prevented from deteriorating." The flow area of the passage between the crank chamber and the lubricating oil recovery chamber is set to be large, so that the lubricating oil recoverability from the crank chamber can be improved. In addition, the amount of lubricating oil flowing back from the lubricating oil recovery chamber to the crank chamber side by the pressure arteries of the crank chamber and the vibrations from the road surface or the engine during riding is suppressed at the partition wall and the communication hole. To a minimum, and thus to improve the recovery performance of lubricating oil ° According to the invention in the scope of patent application No. 6, the side landing support is used

89123572.ptd Page 23 ^ b 629 9 V. Description of the invention (18) The tilting state of the vehicle body The tilting of the vehicle body can effectively recover the lubricating oil of the crank chamber. [Description of component numbers] 11 Main frame 12 Front fork 13 Head tube 14 Handlebar 15 Seat lever 16 Seat stay 17 Fuel tank 18 Seat 19 Rear wheel fork 20 Cushion unit 21 Side-to-side floor support 22 Cylinder section 23 Cylinder Head 24 Crankshaft box 25 Cylinder bore 26 Piston 28 Crankshaft 29 Coupler 30 Crank pin 31 Combustion chamber v / 32 Mars plug

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V. Description of the invention (19) 33 Crank chamber 34 Sweep port 35 Exhaust port 36 Intake port 37 Pilot valve 38 Intake system 39 Purity material 40 Purifier 41 Throttle valve 42 Air 4 dagger 43 Intake pipe 44 Bolt 45 Forked pipe 46 Empty room 47 Exhaust system 48 Exhaust pipe X 49 Exhaust muffler 50 Mite mechanism 51 Synthetic tube 52 Mounting part 53 Transmission room 54 Transmission case 55 Main shaft 75 6 Reverse shaft 89123572.ptd Page 25 4 6 629 9

V. Description of the invention (20) 57 Multi-stage transmission 58 Drive chain 59 Drive gear 60 Auxiliary machine room 61 First oil seal member 62 First ball bearing 63 Second oil seal member 64 Third oil seal member 65 Second ball bearing 66 Oil seal space 67 Driving helical gear 68 Follower helical gear 69 Transmission gear 70 Lubricating oil receiving part 71 Lubricating oil supply hole 72 Lubricating oil discharge hole 73 Blocking part 74 Blocking part 75 Lubricating oil recovery chamber 75a Upper chamber 75b Lower chamber 76 Lubricating oil recovery box 77 box Body 78 Side cover 89123572.ptd Page 26 46 629 9 V. Description of the invention (21) 80 '81 82 83 84 85 86 87 88 89' 89 90 91 92 93 94 95 96 97 98 99 100 101 102 102a 102b Support Arm seal member Inter-wall communication hole Connecting pipe Lubricating oil conduit Spacer cover Bolt passage Entrance chamber Exit chamber Sealing material Sealing material One-way valve mounting hole Retaining tube Disk-shaped valve body Valve hole restricting convex connection pipe Return pipe No. 1 pipe 2nd pipe

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89123572.ptd Page 28 466299 Brief description of drawings Figure 1 is a side view of a motorcycle. Figure 2 is a partially cutaway side view of a two-stroke engine. Fig. 3 is an enlarged cross-sectional view taken along a line 3-3 of Fig. 2 in a use state of a side-ground support. Fig. 4 shows a longitudinal sectional side view with a part of the exhaust system cut away. FIG. 5 is an enlarged cross-sectional view taken along line 5-5 in FIG. 3. Fig. 6 is a partially cutaway side view of the lubricant recovery tank. FIG. 7 is a front view cut away from the direction of arrows 7 in FIG. 6.

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Claims (1)

46 629 9 VI. Scope of patent application 1. A lubricant recovery device for a two-stroke engine, which is a lubricant recovery chamber (75) connected to the bottom of a crank chamber (3 3) provided in the two-stroke engine (E), The suction system (38) connected to the two-stroke engine (E) via the return line (102) is characterized by having a control valve (103) immediately after the two-stroke engine (E) is started until it Until the predetermined warm-up state is reached, it is used to prevent the lubricating oil from the lubricating oil recovery chamber (7 5) to the suction system (3 8) from flowing back. 2. For example, the lubricant recovery device for a two-stroke engine in the first scope of the patent application, wherein the control valve (103) is the first nozzle (104) to be connected to the lubricant recovery chamber (75). ), In the second nozzle (105) and the third nozzle (106) connected to the above-mentioned suction system (38), select one of the electromagnetic switching valves to switch between them; open the tube (107), One end is connected to the third nozzle (10 6), and the other end, which is placed above the control valve (10 3), is open to the air. 3. For example, in the scope of the patent application, the first two-stroke engine lubricating oil recovery device, wherein the lubricating oil recovery chamber (7 5) is connected to the throttle valve (4 1) via a return line (1 0 2). And the above-mentioned suction system (38) between the pilot valve (37). 4. If the lubricant recovery device for the two-stroke engine of item 1 of the scope of the patent application, the above-mentioned prescribed warm-up state is the catalyst mechanism (47) provided on the exhaust system (47) of the two-stroke engine (E) 50) The catalyst is activated. 5. —A lubricating oil recovery device for a two-stroke engine, which is arranged in a crank chamber (33) than the two-stroke engine (E) mounted on a motorcycle. 89123572.ptd Page 30 46 629 9 々, the scope of patent application _______ is further down 'and is far from the bottom of the above crank chamber (33) ... The chamber (7 5) is formed by the engine (E) supported by the above (76), the above-mentioned lubricating oil recovery chamber (75) is an on- / off-line oil recovery tank, which is connected to the engine, and is characterized by: ... · The lubricant recovery box 76 is provided with a partition wall 83 for the two chambers of the lubricant recovery, _, and main (3 knives (¾red ~ fT); the upper and lower chambers are the upper chamber? 5 &, which are connected to the crank chamber. The bottom 33 and the lower chamber 75b are connected to the suction system 38; the partition wall 8 3 is a funnel shape that gradually decreases as the circulation area of the lubricating oil is formed downward, and the bottom of the partition wall 8 3 is the most The lower end is provided with a communication hole 84 that connects the upper chamber 7 5 a and the lower chamber 75 b. 6. For example, the oil recovery device for a stroke engine in the 5th item of the scope of the patent application, where the supporting frame (21) Connect the one end of the lubricating oil pipe (8 6) to the crank using the position that causes the car body to be tilted to form the lowest end In the bottom (33), and the other end of the lubricant conduit (86) is connected to said upper chamber (75a). 89J23572.ptd Page 31