Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
1998-10-26
2001-11-13
Dolinar, Andrew M. (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S1490FA, C123S179500, C123S185300
Reexamination Certificate
active
06314938
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to internal combustion engines and, more particularly, to a starting system for a pull start engine.
2. Prior Art
Pull start internal combustion engines are well known in the art. These manual pull start engines have a starting pulley and a pull cord that is wrapped around the starting pulley in a groove. The diameter of the groove cannot be too large otherwise the pulley will not be able to turn the rotor of the engine fast enough to cause the engine to start.
SUMMARY OF THE INVENTION
In accordance with one embodiment of the present invention a starting system for an internal combustion engine is provided having a starting pulley with a pull cord groove, a pull cord wrapped around the starting pulley in the pull cord groove, a rotor selectively engageable with the starting pulley, and an ignition module located adjacent the rotor and connected to a spark plug of the engine. The ignition module is adapted to produce an ignition voltage high enough to fire the spark plug with a timing retard of about eight degrees at a speed of about 500 rpm of the rotor. The pull cord groove has a diameter between about 2.5 to 3.4 inches.
In accordance with another embodiment of the present invention a starting system for an internal combustion engine is provided having a starting pulley, a pull cord wrapped around the starting pulley, a rotor selectively engageable with the starting pulley, and an ignition module located adjacent the rotor and connected to a spark plug of the engine. The starting system further comprises means for reducing pull cord speed to start the engine without increased engine kickback comprising the starting pulley having an enlarged diameter pull cord groove, and the ignition module being adapted to produce an ignition voltage high enough to fire the spark plug of the engine at a low rotor rotational speed of about 500 rpm.
In accordance with one method of the present invention a method of starting an internal combustion engine is provided comprising steps of pulling a starter pull cord of the engine with a speed of about 5.5 feet per second; and rotating a rotor of the engine at a speed of about 500 rpm while the pull cord is being pulled at about 5.5 feet per second. The engine has an ignition module adapted to produce an ignition voltage high enough to fire a spark plug of the engine at the minimum start speed of the rotor.
REFERENCES:
patent: 2841629 (1958-07-01), Autrey
patent: 3874354 (1975-04-01), Crouch
patent: 4114583 (1978-09-01), Sleder et al.
patent: 4163437 (1979-08-01), Notaras et al.
patent: 4345575 (1982-08-01), Jorgensen
patent: 4610231 (1986-09-01), Nakata et al.
patent: 4817577 (1989-04-01), Dykstra
patent: 5361738 (1994-11-01), Iida
patent: 5377642 (1995-01-01), Morrow et al.
patent: 5600195 (1997-02-01), Welborn et al.
patent: 5630384 (1997-05-01), Mottier et al.
patent: 5816221 (1998-10-01), Krueger
patent: 2-108855 (1990-04-01), None
Patent Abstracts of Japan, Publication No. 56162947, Dec. 15, 1991, one page, Application No. JP 55065244, “Flywheel Magnet”, Takamiki.
Patent Abstracts of Japan, Publication No. 54057039, May 8, 1979, one page, Application No. JP 52123315, “Manual Starter”, Toshiro.
Homelite Parts List 1998 John Deere Consumer Products, Inc. (17pgs.)
Campbell Jack Eric
Gaymon Charles
McCreery Patrick A.
Deere & Company
Dolinar Andrew M.
Perman & Green LLP
LandOfFree
Starting system for spark ignition engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Starting system for spark ignition engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Starting system for spark ignition engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2589823