Exhaust gas recirculation mechanism for an engine with a turbocharger

Patent · Tue Jun 10 04:00:00 EDT 1980

OSTI ID:5585192

Yamada, K

A recirculation duct with a check valve is connected to an exhaust duct communicating with the engine and a turbine of a turbocharger and an delivery duct communicating with the engine and compressor of the turbocharger. A branch duct is connected to the delivery tube upstream of the recirculation duct. In the branch duct, a control valve is provided for controlling a quantity of air flowing in the branch duct according to both a pressure in the exhaust duct and a pressure in the delivery duct downstream of the branch dust to lower the pressure in the delivery duct downstream of the branch duct thereby recirculating part of the exhaust gas. The control valve is provided with a dashpot and push rods, and driven by an accelerator when the engine runs at high load. The dashpot damper a rapid movement of the control valve made by the accelerator.

• Assignee: Hitachi Ltd (Japan)
• Patent Number(s): US 4206606
• OSTI ID: 5585192
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
CHALCOGENIDES
COMPRESSORS
CONTROL EQUIPMENT
DUCTS
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
SUPERCHARGERS
TURBINES
TURBOMACHINERY
VALVES