Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1982-09-30
1984-09-04
Burns, Wendell E.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
F02M 2506
Patent
active
044690797
ABSTRACT:
This invention relates to electronically controlled exhaust gas recirculation valves and more particularly to systems incorporating an electrical vacuum regulator.
It is therefore an object of the present invention to provide an EGR system that is less susceptible to output flow changes caused by carbon build up. A further object of the invention is to provide a vacuum regulator that can be used with simple, low cost EGR valves. Simple valves can be used by virtue of the closed loop vacuum regulation feature of the present invention since the flow rate/vacuum signal relationship is not important. A further object of the present invention is to provide an EGR flow regulation system which automatically compensates for pressure variations which result in changes in the pressure differential across the EGR valve due to changes in exhaust system pressure and intake manifold pressure.
Many other objects and purposes of the invention will be clear from the following detailed description of the drawing.
REFERENCES:
patent: 4274385 (1981-06-01), Yuzawa et al.
Burns Wendell E.
Canadian Fram Limited
Seitzman Markell
Wells Russel C.
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