Claims
- 1. A valve opening mechanism for a rotary throttle valve carburetor having a main body with an air intake passage, a cylindrical throttle valve installed in the main body and the air intake passage, a fuel metering device operably coupled to the throttle valve, and a lever connected to the throttle valve and adapted to couple to an engine accelerator, comprisinga first member adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to increase air flow rate, and a second member operably coupled to said first member and adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to adjust fuel flow rate.
- 2. The valve opening mechanism of claim 1, said first member being adapted to engage the lever to rotate the throttle valve, and said second member being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve.
- 3. The valve opening mechanism of claim 1, wherein said first and second members form first and second cam surfaces on one end of a cam part, said first cam surface being adapted to engage the lever to rotate the throttle valve, said second cam surface being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve.
- 4. The valve opening mechanism of claim 1, wherein said valve opening mechanism is movable between an inoperative position and an operative position.
- 5. The valve opening mechanism of claim 4, further comprising a return member adapted to return said valve opening mechanism to an inoperative position.
- 6. The valve opening mechanism of claim 1, further comprising an anchoring mechanism that operably engages a throttle valve lever.
- 7. The valve opening mechanism of claim 1, further comprising a stroke regulating member that causes said valve opening mechanism to move a fixed distance between an inoperative position and an operative position.
- 8. The valve opening mechanism of claim 1, wherein said valve opening mechanism is adapted to operably and releasably couple to a throttle valve lever and be returnable to an inoperable position when the lever is further adjusted by the engine accelerator.
- 9. A valve opening mechanism for a rotary throttle valve carburetor having a main body with an air intake passage, a cylindrical throttle valve installed in the main body and the air intake passage, a fuel metering device operably coupled to the throttle valve, and a lever connected to the throttle valve and adapted to couple to an engine accelerator, comprisinga first member adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to increase air flow rate, and a second member operably coupled to said first member and adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to adjust fuel flow rate, wherein the valve opening mechanism is adapted to operably and releasably couple to the lever and be returnable to an inoperable position when the lever is further adjusted by the engine accelerator.
- 10. The valve opening mechanism of claim 9, said first member being adapted to engage the lever to rotate the throttle valve, and said second member being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve.
- 11. The valve opening mechanism of claim 9, wherein said first and second members form first and second cam surfaces on one end of a cam part, said first cam surface being adapted to engage the lever to rotate the throttle valve, said second cam surface being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve.
- 12. The valve opening mechanism of claim 9, wherein said valve opening mechanism is movable between an inoperative position and an operative position.
- 13. The valve opening mechanism of claim 12, further comprising a return member adapted to return said valve opening mechanism to an inoperative position.
- 14. The valve opening mechanism of claim 9, further comprising an anchoring mechanism that operably engages a throttle valve lever.
- 15. The valve opening mechanism of claim 9, further comprising a stroke regulating member that causes said valve opening mechanism to move a fixed distance between an inoperative position and an operative position.
- 16. A valve opening mechanism for a rotary throttle valve carburetor having a main body with an air intake passage, a cylindrical throttle valve installed in the main body and the air intake passage, a fuel metering device operably coupled to the throttle valve, and a lever connected to the throttle valve and adapted to couple to an engine accelerator, comprisinga first member adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to increase air flow rate, and a second member operably coupled to said first member and adapted to operably couple to the throttle valve and adjust the throttle valve independent of the engine accelerator to adjust fuel flow rate, wherein said first and second members form first and second cam surfaces on one end of a cam part, said first cam surface being adapted to engage the lever to rotate the throttle valve, said second cam surface being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve, and wherein the valve opening mechanism is adapted to operably and releasably couple to the lever and be returnable to an inoperable position when the lever is further adjusted by the engine accelerator.
- 17. The valve opening mechanism of claim 16, said first member being adapted to engage the lever to rotate the throttle valve, and said second member being adapted to engage the lever to raise the throttle valve along a central axial line of the throttle valve.
- 18. The valve opening mechanism of claim 16, wherein said valve opening mechanism is movable between an inoperative position and an operative position.
- 19. The valve opening mechanism of claim 18, further comprising a return member adapted to return said valve opening mechanism to an inoperative position.
- 20. The valve opening mechanism of claim 16, further comprising an anchoring mechanism that operably engages a throttle valve lever.
- 21. The valve opening mechanism of claim 16, further comprising a stroke regulating member that causes said valve opening mechanism to move a fixed distance between an inoperative position and an operative position.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-303589 |
Oct 1996 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. application Ser. No. 09/303,112, filed Apr. 30, 1999, now U.S. Pat. No. 6,142,455, which is a divisional of U.S. application Ser. No. 08/959,998, filed Oct. 29, 1997, now U.S. Pat. No. 5,942,160, the disclosures of which are incorporated herein by reference.
US Referenced Citations (14)
Foreign Referenced Citations (2)
Number |
Date |
Country |
58-101253 |
Jun 1983 |
JP |
64-69764 |
Mar 1989 |
JP |