Turbocharger control system

Patent · Tue Feb 17 04:00:00 EST 1987

OSTI ID:6720953

Kawabata, Y

This patent describes a turbocharger control system utilized in an internal combustion engine having a turbocharger turbine with a downstream passage, a combustion chamber, an exhaust treatment device, an actuator, a link mechanism connected to the actuator, a compressor, and a throttle valve. The engine also has an engine intake manifold, air flow passage means leading from the compressor to the throttle valve and an exhaust passage leading from the combustion chamber. The system comprises: bypass passage means connecting the exhaust passage leading from the combustion chamber to the turbocharger turbine with the downstream passage of the turbine so as to connect the combustion chamber directly to the exhaust treatment device around the turbine; a waste gate valve connected to the actuator by means of the link mechanism so as to close the bypass passage wherein the actuator comprises a first chamber continuously communicating with atmospheric pressure, a second chamber connected to the air flow passage means leading from the compressor to the throttle valve, and a third chamber connected to the engine intake manifold; first spring means interposed in the first chamber for biasing the waste gate valve toward a closed position; and second spring means interposed in the third chamber and having a stronger spring load characteristic than the first spring means for biasing the waste gate valve towards an opened position.

• Assignee: Aisin Seiki Kabushiki Kaisha, Kariya
• Patent Number(s): US 4642991
• OSTI ID: 6720953
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
AIR FLOW
ATMOSPHERIC PRESSURE
COMBUSTION CHAMBERS
COMPRESSORS
CONTROL EQUIPMENT
CONTROL SYSTEMS
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID FLOW
GAS FLOW
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
MECHANICAL STRUCTURES
SPRINGS
SUPERCHARGERS
TURBOCHARGERS
VALVES