F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
123/8
F02D 9/08 (2006.01) B60K 26/04 (2006.01) B60K 31/12 (2006.01) F02B 63/02 (2006.01) F02D 11/04 (2006.01)
Patent
CA 1219503
ABSTRACT An override speed control for the carburetor of a small internal combustion engine such as used with lawnmowers. The control for preventing changes in speed of the engine while a speed control lever is moved into its choke position comprises a speed control lever, an intermediate or enabling lever and a throttle control lever. The three levers are interconnected by means of extension springs one each of which connects the intermediate lever respectively to the speed control lever and the governor lever. The speed control lever in the last increment of movement of its control range actuates the choke valve of the carburetor. The governor lever controls the throttle valve of the carburetor. A governor driven by the engine and responsive to engine speed is connected to the governor lever. Adjustable stop means are provided on the intermediate lever to positively stop movement of the intermediate lever during the last increment of movement of the speed control lever. The control system maintains a constant engine speed for any setting of the speed control lever when the speed control lever is in its last increment of movement. During this increment of movement of the control lever the intermediate lever is unresponsive to movement of the speed control lever, the speed of the engine will be maintained at the high speed setting so that the engine speed will remain constant irrespective of the choking action of the speed control lever. The governor maintains control over the engine speed under varying loading conditions from the idle setting through the choke setting of the speed control lever. Adjustable positive stop means are provided on the intermediate lever for defining the idle setting.
473269
Ditter Stephen D.
Pirkey Robert J.
Macrae & Co.
Tecumseh Products Company
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