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61. 发明专利

JP2002266705A FILM TYPE CARBURETOR 失效
公开(公告)号：JP2002266705A
公开(公告)日：2002-09-18
申请号：JP2001064448
申请日：2001-03-08
申请人： ZAMA JAPAN CO LTD
发明人： NONAKA TAKUMI , ARAKI SATORU
IPC分类号： F02B25/20 , F02M1/16 , F02M7/12 , F02M7/18 , F02M7/20 , F02M7/22 , F02M9/08 , F02M17/04 , F02M17/48 , F02M19/04
摘要： PROBLEM TO BE SOLVED: To increase an output, reduce a size, and facilitate, the designing and manufacturing of a carburetor in which a measuring needle interlocking with a throttle valve controls a fuel flow rate from a single fuel system. SOLUTION: A spiral-shaped throttle valve 3 is provided on an intake passage 2 having an approximately uniform diameter in an overall length and a fuel nozzle 11 is arranged on a lower stream side. The measuring needle 21 is held by a working member 27 constantly being in contact with a cam surface 26 of a cam member 24 provided on valve shaft 4 and linearly reciprocating, and fuel delivered to the intake passage 2 through the fuel nozzle 11 from a constant fuel chamber 9 is controlled in accordance with opening and closing of the throttle valve 3. The measuring needle 21 can control the a flow rate with an optional stroke by a cam 25 irrespective of opening and closing operations of the throttle valve 3.

62. 发明专利

JP2002039016A ROTARY THROTTLE VALVE TYPE CARBURETTOR 失效
公开(公告)号：JP2002039016A
公开(公告)日：2002-02-06
申请号：JP2000222218
申请日：2000-07-24
申请人： WALBRO JAPAN INC
发明人： TERAKADO HITOSHI , OTSUKI BUNICHI , AIHARA TAMIO
IPC分类号： F02M9/08 , F02M7/08 , F02M9/12
摘要： PROBLEM TO BE SOLVED: To make fuel smoothly flow from a constant pressure chamber to a fuel supply pipe even when an engine is running by continuous accelerating and decelerating operations. SOLUTION: A throttle valve 25 having a throttle hole 26 is rotateably and elevateably inserted into a valve chamber 24 arranged so as to be perpendicular to an intake passage 28 of a carburetor body 21. A needle 2 supported by the throttle valve 25 is inserted into a fuel supply pipe 3 projecting from a constant pressure fuel chamber 43 located at a bottom portion of the carburetor body 21 toward the throttle hole 26. An intake air volume of the intake passage 28 is adjusted by turning the throttle valve 25. Fuel quantity from the fuel supply pipe 3 is adjusted by vertically moving the throttle valve 25. An accelerating pump 31 is structured by inserting a plunger 32 into a cylinder 29 arranged perpendicular to the valve chamber 24 of the carburetor body 21. The plunger 32 engages with a cam groove 61 on an external peripheral surface of the throttle valve 25 by a spring. A fuel inlet and outlet fuel inlet and outlet port of the cylinder 29 is communicated with a passage connecting the constant pressure fuel chamber 43 to a fuel injecting hole 3a at a downstream position from a check valve 4 and at an upstream position from a fuel jet 37.

63. 发明专利

JP2001342900A ROTARY THROTTLE VALVE TYPE CARBURETTOR 失效
公开(公告)号：JP2001342900A
公开(公告)日：2001-12-14
申请号：JP2000167286
申请日：2000-06-05
申请人： WALBRO JAPAN INC
发明人： ABEI TAKASHI
IPC分类号： F02M9/08 , F02M9/12
摘要： PROBLEM TO BE SOLVED: To let the suction gas flow approximately uniformly over the whole section of passage of the throttle hole by eliminating turbulence of the suction gas flowing in a throttling hole of a rotary throttle valve. SOLUTION: A suction passage 16 penetrating transversely the body 15 of a carburettor is furnished with a cylindrical valve chest 57 which interscts the suction passage 16 perpendicularly, and in the valve chest 57, a rotary throttle valve 47 having a throttling hole 47b is fitted rotatably and with possibility of elevating and sinking. A needle 55 supported by the rotary throttle valve 47 is fitted in a fuel supply pipe 56 protruding from a constant pressure fuel chamber 25 into the throttling hole 47b. The degree of opening of this hole 47b is adjusted by rotating the valve 47 while the degree of opening of a fuel jet 56a in the fuel supply pipe 56 is adjusted by elevating and sinking the valve 47. The carburettor body 15 is furnished with idling passages 73 and 74 in the transverse direction penetrating the valve chest 57, and the outer end of the passage 73 is connected with another passage 71 opening in the side wall at the inlet of the suction passage 16. The outer end of the passage 74 is connected with a passage 76 opening in the side wall at the outlet of the suction passage 16.

64. 发明专利

JP2001342837A STRATIFIED SCAVENGING TWO-CYCLE ENGINE 失效
公开(公告)号：JP2001342837A
公开(公告)日：2001-12-14
申请号：JP2000167080
申请日：2000-06-05
申请人： ZAMA JAPAN CO LTD
发明人： KOIZUMI KIMIO , ARAKI SATORU
IPC分类号： F02B33/04 , F02B25/16 , F02B25/20 , F02B25/22 , F02B33/44 , F02B75/02 , F02D9/02 , F02D9/14 , F02M9/06 , F02M9/08 , F02M11/08
摘要： PROBLEM TO BE SOLVED: To correspond to a case that a set space is extremely restricted by miniaturizing a flow controlling means comprising a throttle valve for output control and an air valve for controlling scavenging air flow and shortening a mixture passage and an air passage. SOLUTION: The throttle valve 22 of the mixture passage 6 connected to a crank chamber 3 and the air valve 25 of the air passage 9 connected to a scavenging passage 8 are integrally formed by engaging one cylindrical valve element 27 having a throttle through hole 23 and an air through hole 26 with one body 28. The mixture passage 6 is straight in the body 28, the air passage 9 is directed obliquely upward on the downstream side of the valve element 27, and the upstream sides of the valve element 27 of the passages 6 and 9 are formed with one common inlet passage 30.

65. 发明专利

JP2001317410A ROTARY THROTTLE VALVE TYPE CARBURETOR 失效
公开(公告)号：JP2001317410A
公开(公告)日：2001-11-16
申请号：JP2000134852
申请日：2000-05-08
申请人： WALBRO JAPAN INC
发明人： KOBAYASHI TAKESHI
IPC分类号： F02M9/12 , F02M9/08 , F02M19/03
摘要： PROBLEM TO BE SOLVED: To prevent undersize of a caliber of a main fuel jet and to secure stability of fuel flow rate. SOLUTION: A rotary throttle valve 7 having a throttle hole 7a is rotatably and liftably engaged with a cylindrical valve chest 3 vertically crossing an intake passage 21 laterally penetrating a carburetor body 20. A needle 5 supported by the rotary throttle valve 7 is engaged with a fuel supply pipe 4 extending from a constant pressure fuel chamber supported on the bottom wall of the valve chest 3 to the throttle hole 7a. A fuel injection hole 4a of the fuel supply pipe 4 is faced in an opening increasing direction and an oblique direction of the rotary throttle valve 7 in relation to the center axis c on the inlet side of the intake passage 21.

66. 发明专利

JP2001280161A ROTOR TYPE THROTTLE VALE OF SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2001280161A
公开(公告)日：2001-10-10
申请号：JP2000094359
申请日：2000-03-30
申请人： HONDA MOTOR CO LTD
发明人： SUZUKI OSAMU , TAKAHASHI YASUSUKE
IPC分类号： F02D9/10 , F02D9/16 , F02M9/08
摘要： PROBLEM TO BE SOLVED: To reduce a fluid resistance by making vortex small, which is generated at the time of an intermediate opening, in a rotor type throttle valve of a spark ignition type internal combustion engine. SOLUTION: The rotor type throttle valve of the spark ignition type internal combustion engine is provided with a valve casing 11 wherein intake passages 12a, 12b are formed inside and a rotor recessed part 12d serving a line crossed with a center axis 12c of the intake passage as an axis core 14 is formed between the intake passages 12a, 12b, and a valve element of a rotor shape which is rotatably fitted to the rotor recessed part 12d of the valve casing 11. In the rotor type throttle valve of the spark ignition type internal combustion engine wherein a communicating passage 15 for communicating the upstream side intake passage 12a and a downstream side intake passage 12b which are held by the rotor recessed part 12d of the valve casing 11 is disposed in the valve element 13, a penetrating hole 18 is disposed, which is directed from the communicating passage 15 of the valve element in the direction crossed with the center axis 15a of the communicating passage 15, and which achieves only in one direction of the rotation outer surface of the valve element 13.

67. 发明专利

JP2001012304A THROTTLE LEVER HAVING FUEL FLOW ADJUSTING FUNCTION 失效
公开(公告)号：JP2001012304A
公开(公告)日：2001-01-16
申请号：JP17891199
申请日：1999-06-24
申请人： NIPPON WALBRO KK
发明人： TERAKADO HITOSHI , OKANE SHINICHI , TOBIUCHI TERUHIKO
IPC分类号： F02M19/00 , F02D9/02 , F02D9/10 , F02D11/02 , F02M9/08 , F02M9/12 , F02M19/12
摘要： PROBLEM TO BE SOLVED: To provide a throttle lever having fuel flow adjusting function with high rigidity against deformation and high reliability, and tightly coupled with a throttle valve. SOLUTION: A throttle valve 8 having a restriction 8b is inserted and fitted rotatably and liftably into a cylindrical valve chamber crossing an intake passage of a carburetor body. A fuel nozzle is projected from a constant-pressure fuel chamber disposed at the bottom of the carburetor body to the restriction 8b of the throttle valve 8. A shaft portion 4a extending from the throttle valve 8 to the outside through a lid 25 for closing the valve chamber supports a needle valve to be inserted and fitted into the fuel nozzle. A metal reinforcing plate 45 is insert-molded in a throttle lever 2 made of a synthetic resin. The metal reinforcing plate 45 has: a shaft hole fitted to the shaft portion 4a; a cam portion 5 engaged with a follower supported by the lid 25, by force of a return spring; and a lever portion extending from the shaft hole to a side opposite to the cam portion 5.

68. 发明专利

JP2000352354A CARBURETOR FOR TWO CYCLE INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JP2000352354A
公开(公告)日：2000-12-19
申请号：JP16211199
申请日：1999-06-09
申请人： NIPPON WALBRO KK
发明人： OKANE SHINICHI , SAITO NOBORU , AIHARA TAMIO
IPC分类号： F02M9/12 , F02M9/08 , F02M17/40
摘要： PROBLEM TO BE SOLVED: To prevent interference of pressure (negative pressure) from a two-cycle internal combustion engine acting on a rotary fuel control valve and a rotary air control valve within a carburetor. SOLUTION: An intake passage 12 and an air passage 14 are built in parallel each other in a carburetor body 10. A cylindrical part 16 crossing vertically the intake passage 12 and another cylindrical part 18 crossing vertically the air passage 14 are formed in respective communication with a common axis. A rotary fuel control valve 20 to control a fuel amount in the intake passage 12 and a rotary air control valve 22 to control an air amount in the air passage 14 are formed integrally coaxially. In the cylindrical part 16 the rotary fuel control valve 20 is fitted rotatably and movably along an axial direction and in the cylindrical part 18 the rotary air control valve 22 is fitted rotatably and movably along the axial direction. Between the circumference of the rotary air control valve 22 and the cylindrical part 18 a lip seal 80 is interposed to retain the air tightness between the intake passage 12 and the air passage 14.

69. 发明专利

JP2000291492A ROTARY THROTTLE VALVE CARBURETOR 失效
公开(公告)号：JP2000291492A
公开(公告)日：2000-10-17
申请号：JP9949799
申请日：1999-04-07
申请人： TK CARBURETTOR
发明人： OBARA KIYOHARU , WADA SHINICHIRO
IPC分类号： F02M9/08
摘要： PROBLEM TO BE SOLVED: To provide a mechanism for interlocking a needle with the rotation of a throttle valve and fine adjusting the vertical direction with a simple structure, in a rotary throttle valve-type carburetor in which a throttle valve chamber is provided perpendicular to an intake passage perforating through a carburetor main body, a throttle valve having a throttle hole facing the intake passage is rotatably arranged, and a fuel control means for controlling the fuel injection amount by the rotation of a needle is provided on the overlapped part of the fuel nozzle and the needle. SOLUTION: An adjusting screw 18 is screwed to the upper part of a throttle valve 6, so as to deviate from the rotational center of the throttle valve, and an adjusting screw 18 is engaged in the deviated position of the upper surface of a needle head part 16. Therefore, the rotation of a needle 15 is prevented and interlocked with the rotation of the throttle valve, and the needle 15 can be vertically and finely adjusted by the rotation of the adjusting screw 18.

70. 发明专利

JP2000110664A FUEL CONTROL DEVICE FOR ROTARY THROTTLE VALVE TYPE CARBURETOR 失效
公开(公告)号：JP2000110664A
公开(公告)日：2000-04-18
申请号：JP28270098
申请日：1998-10-05
申请人： TK CARBURETTOR
发明人： AOSHIRO TOKIHIKO
IPC分类号： F02M9/06 , F02M9/08 , F02M19/04
摘要： PROBLEM TO BE SOLVED: To provide a rotary throttle valve type carburetor excellent in operating performance of a throttle valve with a swivel mounted to an operating lever hardly rattling. SOLUTION: A needle 17 is mounted to a throttle valve 6 so as to be interlocked in the rotating direction, and concurrently, the tip end of it is almost closely inserted into a fuel nozzle 9, a cut-out 27 including an inclined side 26 inclined downward toward the valve opening direction of the throttle valve 6 is provided for the side surface of the fuel nozzle 9, and meanwhile, a semi- cut-out part 28 for increasing/decreasing the opening area of the cut-out 27 is provided for the tip end of the needle 17. By this constitution, fuel is controlled by the rotation of the needle 17 interlocked with the throttle valve 6, so that the operating lever 12 is thereby prevented from moving up and down.

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