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1. 发明专利

JP2000192849A PORTABLE OPERATION EQUIPMENT FOR FOUR CYCLE ENGINE 失效
公开(公告)号：JP2000192849A
公开(公告)日：2000-07-11
申请号：JP37034099
申请日：1999-12-27
申请人： STIHL MASCHF ANDREAS
发明人： BECKER GEORG , HAEBERLEIN JUERGEN
IPC分类号： F02B33/04 , F01M1/04 , F01M3/00 , F01M9/10 , F01M13/00 , F02B29/06 , F02B63/02 , F02B75/02 , F02F1/42 , F02F7/00
摘要： PROBLEM TO BE SOLVED: To provide an engine which can be used in any attitude with low structural blight. SOLUTION: This chain saw comprises an internal combustion engine disposed inside a casing of the chain saw for driving tools, and the internal combustion engine is provided with a cylinder 11 and a combustion chamber 21 formed in the cylinder 11 and defined by a piston 22. The piston 22 drives a crank shaft 20 supported rotatably in a crank case 41 via a connecting rod 23. At least one intake port and one exhaust port are provided for gas exchange in the combustion chamber 21, and the intake port is connected to a fuel-air mixture preparing device 36 via an intake passage 43. The internal combustion engine is a short stroke engine having a ratio of a short stroke to a cylinder bore smaller than 0.8. The intake port and exhaust port are controlled so as to be opened or closed via valves 24 and 25. A valve gear 40 for driving the valves 24 and 25 is supplied with air-fuel mixture of air, fuel, and lubricating oil.

2. 发明专利

JP2000008829A INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000008829A
公开(公告)日：2000-01-11
申请号：JP15022099
申请日：1999-05-28
申请人： STIHL MASCHF ANDREAS
发明人： HAEBERLEIN JUERGEN , BECKER GEORG , EBERHARDT MAXIMILIAN , ROSSKAMP HEIKO
IPC分类号： F01M1/06 , F01M13/04
摘要： PROBLEM TO BE SOLVED: To provide a crank casing ventilator capable of guaranteeing the high separation and sure ventilation of a crank case, and the oil discharge prevention in a separate lubricating type internal combustion engine. SOLUTION: An internal combustion engine is provided with a vertically movable piston 3, and the piston drives a crank shaft 5 and other parts of the internal combustion engine connected thereto through a connecting rod 4. The crank shaft 5 is supported by a crank case 2, the crank case 2 is provided with a crank case ventilator 13 to balance the pressure in a crank case inner chamber 14, and the ventilator 13 is provided with a ventilating pipe line 15 to discharge the air from the crank case inner chamber 14. The ventilating pipe line 15 is formed as a path 16 in a rotary parts 5. The path communicates the crank case inner chamber 14 with the atmosphere.

3. 发明专利

JPH10331874A CENTRIFUGAL CLUTCH 失效
公开(公告)号：JPH10331874A
公开(公告)日：1998-12-15
申请号：JP13028898
申请日：1998-05-13
申请人： STIHL MASCHF ANDREAS
发明人： BECKER GEORG , WIEDMANN HANS-GEORG , ANGSTENBERGER DIETER
IPC分类号： F16D43/04 , F16D43/18
摘要： PROBLEM TO BE SOLVED: To precisely guide a centrifugal body so as to reduce abrasion by covering a clutch arm by means of a covering plate, which is held in the axial direction on the opposed positioned side to a supporting plate in the centrifugal body, in the radius direction at an axis directional guiding clearance. SOLUTION: As clutch arms 3a, 3b are covered in the radius direction at an axis directional guiding clearance, the clutch arms 3a, 3b are precisely guided in the axial direction by means of a guiding part 21 in a covering plate 5 when centrifugal bodies 2a, 2b are turned against returning force of a tension spring 8. Because a supporting plate 4 covers the clutch arm bodies 3a, 3b at a small axis directional clearance by means of its ring type circumference similarly, the clutch arm bodies 3a, 3b are precisely guided in the axial direction between the guiding part 21 in the covering plate body 5 and a guiding part 24 on the inside of the supporting plate 4. Therefore, rapid abrasion due to a load, which is applied to the bearing for the centrifugal bodies 2a, 2b because of an axis directional slide in an outward turning time, can be prevented.

4. 发明专利

JPH10205488A SUCTION/BLOW OUT DEVICE 失效
公开(公告)号：JPH10205488A
公开(公告)日：1998-08-04
申请号：JP584098
申请日：1998-01-14
申请人： STIHL MASCHF ANDREAS
发明人： VESER NORBERT , BECKER GEORG , ELSNER THOMAS
IPC分类号： B08B5/02 , A01G1/12 , A47L5/14 , A47L5/22 , A47L9/22 , F01P1/02 , F01P5/06 , F02B63/00 , F02B63/02 , F02B75/02 , F04D25/02 , F04D25/08 , F04D29/58
摘要： PROBLEM TO BE SOLVED: To increase the cooling effect of a driving motor by connecting, to the shaft of a driving motor, a fan wheel for carrying the flow of cooling air taken from the outer surface of a casing and supplying this cooling air flow to the driving motor inside the casing. SOLUTION: A manually operated suction device includes a blower spiral 13 formed in a casing for housing a driving motor 11 and a blower wheel 35 housed in this blower spiral 13 so as to be freely rotated, the blower wheel 34 being connected to the shaft of the driving motor 11. This blower wheel 35 is constructed to include blades 37 and 38 provided in both sides of a wall 36 extending from a hub 34 in its circumferential end direction, and the blower spiral 13 includes air intrusion holes 27 and 28 provided respectively in both end walls 13' and 13" of a radial direction. In this case, an cooling air flow KL, sucked from the outer surface of the casing 12 is carried to the shaft of the driving motor 11 having integrally formed cooling ribs 29..., a fan wheel 30 for supplying this cooling air flow KL to the driving motor 11 is connected, and then the driving motor 11 is cooled by the sucked cooling air.

5. 发明专利

JP2000054821A RECIPROCATING PISTON ENGINE 失效
公开(公告)号：JP2000054821A
公开(公告)日：2000-02-22
申请号：JP21576699
申请日：1999-07-29
申请人： STIHL MASCHF ANDREAS
发明人： HAEBERLEIN JUERGEN , BECKER GEORG
IPC分类号： F01M13/00 , F01M13/02 , F01M13/04
摘要： PROBLEM TO BE SOLVED: To provide a crank case ventillating device which can attain high separation function and sure pressure balance in a reciprocating piston engine, particularly in a separation lubricating type internal combustion engine. SOLUTION: In a reciprocating piston engine which has an elevating piston 3, the piston 3 is operated for rotationally driving a crank shaft 5 and parts connected thereto through a connecting rod 4. The crank shaft 5 is supported to a crank case 2 which has a crank case ventillating device 13 for equalizing pressure inside a crank case inner chamber 14. The ventillating device 13 has a ventillating pipe passage 15 lead from the crank case inner chamber 14. The ventillating pipe passage 15 is formed as passage 16, 25 inside the rotating parts, through which passages 16, 25 the crank inner chamber 14 is communicated with atmosphere. A valve 23 is arranged inside the passages. The valve 23 can be opened while receiving application of centrifugal force. At the time of stopping the engine, the crank case 2 is sealed in a fluid-tight manner.

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