Engine emission control system

Details Engine emission control system Engine emission control system

F - Mech Eng,Light,Heat,Weapons

02

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123/37, 123/98.0

F02M 25/06 (2006.01) F01N 3/30 (2006.01) F02D 37/02 (2006.01) F02M 25/07 (2006.01) F02P 5/10 (2006.01) F02P 5/14 (2006.01)

Patent

CA 1089305

ENGINE EMISSION CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE An automotive emission control system in which the en- gine timing is advanced an amount that is supplemental to the normal part throttle advance, in response to exhaust gas re- circulation (EGR) flow, to compensate for the slower burning rate due to EGR dilution of the engine intake charge, the EGR flow being accomplished by an engine driven air pump pressure controlled by an air pump pressure modified by mani- fold vacuum so as to be speed and load responsive, the triggering pressure also being applied to the ignition timing distributor servo.

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