Exhaust gas recycling system

Patent · Tue Dec 18 04:00:00 EST 1979

OSTI ID:5313834

Horikoshi, M; Nohira, H; Tanaka, M

Controlled exhaust gas recycling can be accomplished by a pneumatically actuated valve which restricts the flow of exhaust gas from an exhaust manifold of an internal combustion engine to the intake manifold. Exhaust gas may be removed from the manifold and enters a pressure chamber through a reduction means, such as an aperture in a plate. The effective cross-sectional area of hydrodynamic flow of the reduction means is chosen to be greater than the effective cross-sectional area of hydrodynamic flow of the valve. The valve is actuated by a diaphragm control means which is coupled to the intake and exhaust manifold. The diaphragm control means controls the amount of partial pressure applied to the pneumatically actuated valve according to the exhaust pressure from the exhaust manifold. Thus, the ratio of exhaust gas recycled through the internal combustion engine relative to the amount of engine air intake, decreases as the air intake volume increases, such as when the engine is under high loads or operating at high rates (rpm).

• Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
• Patent Number(s): US 4178896
• OSTI ID: 5313834
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
AIR POLLUTION CONTROL
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
WASTES