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1. 发明专利

JPS63266160A SUCTION DEVICE FOR ENGINE 失效
公开(公告)号：JPS63266160A
公开(公告)日：1988-11-02
申请号：JP27624887
申请日：1987-10-31
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02M35/10 , F01L3/20 , F02B27/00 , F02B75/02
摘要： PURPOSE:To prevent over-enrichment of fuel-air mixture during re-starting after the stop of an engine, by a method wherein, in a device which where a branch pipe is branched and connected to a suction passage on the upper stream side of a suction valve, the branch pipe is formed with an closed expansion tank and a coupling pipe having a given length. CONSTITUTION:In a 2-cycle engine, a suction passage 6 in which a reed valve 13 is located is connected to a suction port 7 opened to the inner peripheral surface of a cylinder 1, and a carburetor 15 is connected to the suction passage 6 through a joint 14. A branch pipe 18 is branched upward and connected to the joint 14. In this case, the branch pipe 18 is formed such that a coupling pipe 19 is communicated to the upper outer peripheral surface of the joint 14, and a coupling cylinder part 22 protruded in the bottom of an expansion tank 21 is airtightly coupled to the tip of the coupling pipe 19 through a joint pipe 20. The coupling pipe 19 is formed with an outer pipe 24a and an inner pipe 24b, and the inner pipe 24b is communicated to the interior of an expansion chamber 23 and the suction passage 6.

2. 发明专利

JPS6349052B2 失效
公开(公告)号：JPS6349052B2
公开(公告)日：1988-10-03
申请号：JP8830080
申请日：1980-06-28
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B25/16 , F02B27/00 , F02B75/02 , F02M35/10

3. 发明专利

JPS637254B2 失效
公开(公告)号：JPS637254B2
公开(公告)日：1988-02-16
申请号：JP3491080
申请日：1980-03-18
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02F1/42 , F02B25/20 , F02B27/00 , F02B29/02 , F02F1/24 , F02M31/14 , F02M35/10

4. 发明专利

JPS62247118A SUCTION DEVICE FOR ENGINE 失效
公开(公告)号：JPS62247118A
公开(公告)日：1987-10-28
申请号：JP1435887
申请日：1987-01-24
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B29/02 , F02B31/00
摘要： PURPOSE:To prevent excessive lowering of charging efficiency in the low opening area of a throttle valve and to improve the running efficiency of an engine, by a method wherein a branch pipe, having the closed one end, is communicated in the middle between a throttle valve and a suction valve in the intake air passage of an overhead-valve type engine. CONSTITUTION:In an overhead-valve type engine having poppet type suction and exhaust valves 21 and 22 mounted to a cylinder head 4 by which a combustion chamber 5 is partitioned, an intake air passage 7 opened and closed by means of the suction valve 21 is communicated with a carburetter 15 equipped with a throttle valve 14 through a spacer 13. A pipe 17, having a closed tip and forming a branch pipe 18 in association with the pipe 16, is formed to the pipe 16, engaged with the spacer 13. The sectional area of the portion of the pipe 16 is minimized, and the internal volume of the branch pipe 18 is set to about 1/6 or more of the volume of the intake air passage situated down a line from the throttle valve 14. This constitution enables prevention of a decrease in an output along with lowering of charging efficiency in the low opening area of the throttle valve 14, and execution of high efficient running throughout a wide rotation range.

5. 发明专利

JPH0476011B2 失效
公开(公告)号：JPH0476011B2
公开(公告)日：1992-12-02
申请号：JP1435887
申请日：1987-01-24
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B29/02 , F02B31/00

6. 发明专利

JPH0152580B2 失效
公开(公告)号：JPH0152580B2
公开(公告)日：1989-11-09
申请号：JP15347880
申请日：1980-10-31
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B75/02 , F02M35/10 , F02M35/104

7. 发明专利

JPH0131009B2 失效
公开(公告)号：JPH0131009B2
公开(公告)日：1989-06-22
申请号：JP15347780
申请日：1980-10-31
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B75/02 , F02M35/104

8. 发明专利

JPS631445B2 失效
公开(公告)号：JPS631445B2
公开(公告)日：1988-01-12
申请号：JP8175279
申请日：1979-06-27
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B31/00 , F02B75/02

9. 发明专利

JPH0122453B2 失效
公开(公告)号：JPH0122453B2
公开(公告)日：1989-04-26
申请号：JP2568380
申请日：1980-02-29
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B15/00 , F02B31/00 , F02M35/10

10. 发明专利

JPS6345413A INTAKE DEVICE FOR 2-CYCLE ENGINE 失效
公开(公告)号：JPS6345413A
公开(公告)日：1988-02-26
申请号：JP19341487
申请日：1987-07-31
申请人： YAMAHA MOTOR CO LTD
发明人： MATSUO NORITAKA , TAKEUCHI KOICHIRO , MURAMATSU TOKUJI
IPC分类号： F02B27/00 , F02B29/02 , F02B75/02 , F02M35/10
摘要： PURPOSE:To prevent a variation in an air-fuel ratio by tilting an air-fuel mixture tank bottom from the upper part to the lower part toward a small passage opening, and allowing a fuel in the tank to flow down smoothly when providing the air-fuel mixture tank communicated through the small passage at the up- stream side of a 2-cycle engine intake port. CONSTITUTION:An air-fuel mixture tank 9 communicated to an intake passage 12 through a small passage 10 is provided at an intake passage 12 on the up- stream side of a 2-cycle engine intake port. An air-fuel mixture tank 9 bottom 15 is made to tilt from the upper part to the lower part toward the opening 14 of a small passage 10. This allows the fuel made into droplets within the air-fuel mixture tank 9 to flow smoothly from the small passage 10 to the intake passage 12 to be inhaled there. Thus, the intermittent large quantity of the fuel flowing from the air-fuel tank 9 is eliminated, and thereby a large variation in an air-fuel ratio is prevented.

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