Claims
- 1. A carburetor comprising
an air intake pathway having a nearly uniform diameter along its entire length, a butterfly throttle valve that opens and closes the air intake pathway, a metering pin having a tip thereof inserted into a fuel nozzle opening into the air intake pathway, and a fuel control member linearly reciprocating the metering pin in response to the opening and closing operation of the throttle valve.
- 2. The carburetor of claim 1 wherein the fuel control member comprises
a cam member coupled to a valve stem of the throttle valve, and an actuating member operably coupled to the cam member, the metering pin is coupled to the actuating member and reciprocates linearly following the opening and closing operation of the throttle valve to control the amount of fuel supplied from the fuel nozzle to the air intake pathway.
- 3. The carburetor of claim 2 wherein the cam member comprises an arc-shaped cam face and wherein the actuating member makes constant contact with the cam face.
- 4. The carburetor of claim 2, wherein the actuating member has a metering pin retaining member.
- 5. The carburetor of claim 3, wherein the actuating member has a contact portion in contact with the cam face.
- 6. The carburetor of claim 5, wherein the contact portion is supported on a body of the carburetor by a rotation locking means.
- 7. The carburetor of claim 5, wherein the contact portion is biased against the cam face under the force of a spring.
- 8. The carburetor of claim 4, wherein the retaining member has an open-ended, tube shape and is disposed in a region on the outside of the cam member.
- 9. The carburetor of claim 8, further comprising an adjustment screw screwed into the inside of the retaining member to adjust the insertion depth of the metering pin into the fuel nozzle.
- 10. The carburetor of claim 2, wherein the actuating member has a contact portion and comprises a following member arranged along the surface of the side of a body of the carburetor on the side where the cam member is disposed.
- 11. The carburetor of claim 10, wherein the actuating member has a retaining member, which is secured to the following member and is received in a retaining hole provided in the body.
- 12. The carburetor of claim 11, wherein the actuating member further comprises a rotation locking means.
- 13. The carburetor of claim 12, wherein the rotation locking means includes legs provided on both ends of the following member and inserted into receiving holes provided in the body.
- 14. The carburetor of claim 12, wherein the rotation locking means includes a forked member formed on one end of the following member and coupled with a minimal gap to a boss of the valve stem.
- 15. The carburetor of claim 4, wherein the end of the retaining member is sealed with a plug.
- 16. The carburetor of claim 2, wherein the cam member serves as a throttle lever attached to the valve stem so that acceleration control is transmitted to and opens or closes the throttle valve.
- 17. A fuel control member for carburetor having an air intake pathway and a butterfly throttle valve, comprising
a cam member couplable to a valve stem of a throttle valve of a carburetor, and an actuating member operably coupled to the cam member and a metering pin, the actuating member reciprocates linearly following the opening and closing operation of a throttle valve of a carburetor to control the amount of fuel supplied from a fuel nozzle to an air intake pathway.
- 18. The carburetor of claim 17 wherein the cam member comprises an arc-shaped cam face and wherein the actuating member makes constant contact with the cam face.
- 19. The carburetor of claim 17, wherein the actuating member has a metering pin retaining member.
- 20. The carburetor of claim 18, wherein the actuating member has a contact portion in contact with the cam face.
- 21. The carburetor of claim 20, wherein the contact portion is supportable on a body of a carburetor by a rotation locking means.
- 22. The carburetor of claim 20, wherein the contact portion is biased against the cam face under the force of a spring.
- 23. The carburetor of claim 19, wherein the retaining member has an open-ended, tube shape and is disposed in a region on the outside of the cam member.
- 24. The carburetor of claim 23, further comprising an adjustment screw screwed into the inside of the retaining member to adjust the insertion depth of the metering pin into the fuel nozzle.
- 25. The carburetor of claim 17, wherein the actuating member has a contact portion and comprises a following member positionable along the surface of a side of a body of a carburetor where the cam member is disposed.
- 26. The carburetor of claim 25, wherein the actuating member has a retaining member, which is secured to the following member and is receivable in a retaining hole provided in a body of a carburetor.
- 27. The carburetor of claim 26, wherein the actuating member further comprises a rotation locking means.
- 28. The carburetor of claim 27, wherein the rotation locking means includes legs provided on both ends of the following member and inserted into receiving holes provided in a body of a carburetor.
- 29. The carburetor of claim 27, wherein the rotation locking means includes a forked member formed on one end of the following member and coupled with a minimal gap to a boss of a valve stem of a throttle valve of a carburetor.
Priority Claims (1)
Number |
Date |
Country |
Kind |
JP2001-064448 |
Mar 2001 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of co-pending application Ser. No. 10/094,263, incorporated herein by reference.
Continuations (1)
|
Number |
Date |
Country |
Parent |
10094263 |
Mar 2002 |
US |
Child |
10446918 |
May 2003 |
US |