Method and apparatus of controlling supercharging pressure in a turbocharger

Patent · Tue Oct 27 04:00:00 EST 1987

OSTI ID:5850412

Ueno, T; Abo, T; Miyamura, K

An apparatus for controlling supercharging pressure in a turbocharger is described comprising an exhaust turbine and a compressor, the apparatus comprising a variable geometry means at an inlet to the exhaust turbine, an exhaust bypass valve means bypassing the exhaust turbine, an operation detecting means which detects operating conditions of a device connected to receive a supercharging pressure, a supercharging pressure detecting means which detects the supercharging pressure, a deviation calculating means which calculates the deviation of the detected supercharging pressure from a target supercharging pressure to provide a control value based on the deviation, first and second control calculating means which calculate the controlled variable of the variable geometry means and the exhaust bypass valve means in accordance with parameters representative of the operating conditions including the control value. An operating range discriminating means discriminates in which operating range feedback control is performed and selects whether to perform control in either the variable geometry means or the exhaust bypass valve means in accordance with the result of the operating range discrimination and the control value, and an overboost control means raises the target supercharging pressure during a predetermined time when sudden acceleration is detected. When the overboost control means is operated for overboost control, the operating range for performing feedback control by the variable geometry means is increased.

• Assignee: Nissan Motor Co., Ltd., Kanagawa
• Patent Number(s): US 4702080
• OSTI ID: 5850412
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPRESSORS
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
DESIGN
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FEEDBACK
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINERY
OPERATION
PRESSURE CONTROL
PRESSURIZING
SUPERCHARGERS
TURBINES
TURBOCHARGERS
TURBOMACHINERY
VALVES