Supercharging pressure control system for an internal combustion engine with a turbocharger and method of operation

Patent · Tue Oct 06 04:00:00 EDT 1987

OSTI ID:5977250

Otobe, Y; Niikura, M; Wazaki, Y

This patent describes a supercharging pressure control system for an internal combustion engine having an intake passage, a throttle valve, an exhaust passage, a turbocharger having a turbine arranged in the exhaust passage, and a compressor arranged in the intake passage. It consists of: a bypass exhaust passage bypassing the turbine of the turbocharger; a waste gate valve disposed for selectively closing and opening the bypass exhaust passage; an actuator for actuating the waste gate valve. The actuator has a pressure chamber and is operatively connected to the waste gate valve such that a change in pressure within the pressure chamber causes displacement of the waste gate valve either in a direction of closing same or in a direction of opening same. The pressure chamber communicates with the intake passage at a location downstream of the compressor of the turbocharger and upstream of the throttle valve. The electronic control means are operable to control through feedback the pressure in the intake passage at the downstream side of the throttle valve to reach a target value, by actuating the control valve in dependence on the difference between the target value and the pressure value detected by the second sensor. The feedback control is carried out when the detected value of the throttle valve opening exceeds a predetermined valve opening value.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4697421
• OSTI ID: 5977250
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ANGULAR VELOCITY
AUTOMATION
COMPRESSORS
CONTROL
CONTROL EQUIPMENT
CONTROL SYSTEMS
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
FEEDBACK
FLOW REGULATORS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
PRESSURE CONTROL
SUPERCHARGERS
TURBOCHARGERS
VALVES
VELOCITY