Vacuum control device

Patent · Tue Jan 06 04:00:00 EST 1987

OSTI ID:6838268

Seleno, F M

This patent describes an exhaust gas recirculation valve assembly for an internal combustion engine, comprising: a housing; first inlet means for providing communication between the housing and the intake manifold of the engine; second inlet means for providing communication between the housing and the atmosphere; third inlet means for providing communication between the housing and the exhaust manifold of the engine; outlet means for providing communication between the housing and the intake manifold of the engine; first valve means contained in the housing for controlling the communication between the first inlet means and a mixing chamber formed in the housing and between the second inlet means and the mixing chamber. The vacuum level in the mixing chamber includes a first range in which the vacuum level in the mixing chamber is a linear function of an increasing vacuum level in the first inlet means and a second range in which the vacuum level in the mixing chamber is a non-linear function of an increasing vacuum level in the first inlet means by permitting a controlled communication with both the first and second inlet means and the mixing chamber. The vacuum level in the mixing chamber is maintained during a decrease in the vacuum level in the first inlet means above the predeterminable vacuum level; and second valve means contained in the housing for controlling the communication between the third inlet means and the outlet means in response to the vacuum level in the mixing chamber.

• Assignee: Schmelzer Corp., Flint, MI
• Patent Number(s): US 4633845
• OSTI ID: 6838268
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
330700 -- Advanced Propulsion Systems-- Emission Control
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
MIXING
OPERATION
POLLUTION CONTROL EQUIPMENT
VACUUM SYSTEMS
VALVES
VEHICLES
WASTES