Exhaust gas recirculation control system

Patent · Tue May 19 04:00:00 EDT 1981

OSTI ID:6127272

Mase, Y; Okamura, T

An exhaust gas recirculation control system for an internal combustion engine for removing nitrogen oxides (NO/sub x/) in exhaust gases comprises a positive pressure delay valve in a negative pressure passage for introducing intake negative pressure in the proximity of a throttle valve of a carburetor into an exhaust gas recirculation control valve to maintain the negative pressure therein during an acceleration, thereby effecting the exhaust gas recirculation even when accelerating to purify the nitrogen oxides in the exhaust gas. The exhaust gas recirculation control system further comprises a positive pressure delay valve in an advance negative pressure passage for introducing the intake negative pressure in the vicinity of the throttle valve of a carburetor into a distributor and synchronized with the above positive pressure delay valve to maintain the distributor advanced, thereby keeping a good combustion of fuel mixture.

• Assignee: Nissan Motor Co Ltd (Japan)
• Patent Number(s): US 4267809
• OSTI ID: 6127272
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330701* -- Emission Control-- Nitrogen Oxides
AIR POLLUTION CONTROL
BYPASSES
CARBURETORS
CHALCOGENIDES
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID FLOW
FLUIDS
FUEL SYSTEMS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
VALVES
WASTES