F - Mech Eng,Light,Heat,Weapons – 02 – M
Patent
F - Mech Eng,Light,Heat,Weapons
02
M
123/46
F02M 1/14 (2006.01) F02D 11/08 (2006.01) F02M 3/06 (2006.01)
Patent
CA 1106713
CONSTANT IDLE CONTROLLER ABSTRACT OF THE DISCLOSURE A constant idle control mechanism controls the idle speed of a vehicle engine solely as 3 function of the load on the engine (as indicated by the engine manifold vacuum), and independently of the forces exerted by the throttle return spring and the resistance of the carburetor butterfly valve. The control mechanism includes a pair of coaxial diaphragms which cooperate with one another to define a first chamber between one of the diaphragms and a corresponding end of the housing on which the diaphragms are mounted, a second chamber between the diaphragms, and a third chamber between the other diaphragm and the other end of the housing. Manifold vacuum is communicated to the first and third chambers, and ambient atmospheric pressure is communicated to the second chamber. A valve mechanism controls communication across one of the diaphragms as a function of movement of the other diaphragm, so that the other diaphragm moves with the one diaphragm, but without exerting any force upon it. The other diaphragm controls an actuating plunger which is connected to the butterfly valve of the vehicle carburetor.
322379
Cook John E.
Pul John W.
Canadian Fram Limited
Macrae & Co.
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