F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
172/10, 137/82
F01N 3/10 (2006.01)
Patent
CA 1062166
Abstract of the Disclosure A forced air control valve to control the flow of air to the exhaust pipe of an internal combustion engine immediately upstream of an oxidizing catalytic converter. The control valve when opened at a predetermined vacuum normally directs air to the exhaust pipe and when in a closed position at a low vacuum vents the forced air to atmosphere. Upon rapid deceleration when the main valve is open, a high vacuum is exerted and a separated diaphragm actuated auxiliary vent valve is actuated to vent the main diaphragm chamber to atmos- phere for a limited period of time thereby to close the main valve which is desirable upon rapid deceleration. An air bleed passage is provided in the diaphragm for the auxiliary vent valve diaphragm which permits the auxiliary vent valve to return to a closed position so that a vacuum can again be exerted against the main valve diaphragm. The air bleed passage pr?vides a delay in the equalization of the pressure on opposite sides of the vent valve diaphragm which delays the closing of the auxiliary vent valve thereby delaying the return of the main valve to an open position.
252148
Klimaszewski Leo T.
Mcnairy James A.
LandOfFree
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