Exhaust gas recirculation control method and apparatus for internal combustion engine

Patent · Tue Feb 10 00:00:00 EST 1987

OSTI ID:6876316

Tsutsumi, K

An exhaust gas recirculation control method is described for operating an exhaust gas recirculation control device including a needle valve provided in an exhaust gas recirculation passage for setting an effective diameter of the passage, a position sensor for providing a signal representing a position of the needle valve, and a negative pressure motor for positioning the needle valve. The method comprises: setting a target value for the needle valve according to predetermined operating conditions of the internal combustion engine; measuring a positional deviation between the target value and an actual position of the needle valve as represented by the signal provided by the position sensor; and driving the negative pressure motor with only a single drive pulse having a time width corresponding to the measured positional deviation. An exhaust gas recirculation control apparatus is described for operating an exhaust gas recirculation control device. The apparatus comprises: means for setting a target value for the needle valve according to predetermined operating conditions of the internal combustion engine; and means for measuring a positional deviation between the target value and an actual position of the needle valve as represented by the signal provided by the position sensor.

• Assignee: Mitsubishi Denki Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4641624
• OSTI ID: 6876316
• Resource Relation: Patent File Date: Filed date 3 Feb 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
EXHAUST RECIRCULATION SYSTEMS
CONTROL SYSTEMS
INTERNAL COMBUSTION ENGINES
AIR POLLUTION CONTROL
GAS FLOW
MOTORS
POSITIONING
PRESSURE CONTROL
PULSE TECHNIQUES
SIGNALS
TIMING CIRCUITS
VALVES
CONTROL
CONTROL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID FLOW
HEAT ENGINES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)