Apparatus for controlling pressure-activated actuator, and apparatus for controlling exhaust-gas recirculation

Patent · Tue Sep 27 04:00:00 EDT 1988

OSTI ID:6672904

Hashimoto, M; Demizu, A

This patent describes an apparatus for controlling the exhaust-gas circulation of an engine having an exhaust passage and an intake passage. The apparatus consists of: an exhaust-gas recirculation passage connected at one end to the intake passage and at the other end to the exhaust passage, for guiding part of the exhaust gas flowing through the exhaust passage to the intake passage; an exhaust-gas recirculation valve having a pressure chamber and a valve body being moved in accordance with the pressure within the chamber, for opening and closing the exhaust-gas recirculation passage; first valve means for selectively applying a negative pressure and atmospheric pressure to the pressure chamber, thereby to control the opening of the exhaust-gas recirculation valve means; a first duct provided between the first valve means and the pressure chamber; a second duct provided in parallel to the first duct and having choke means; second valve means for selectively connecting the first and second ducts to the pressure chamber; and control means for actuating the second valve means such that the first duct is connected to the pressure chamber in order to change the pressure within the chamber at high speed, and the second duct is connected to the chamber in order to change the pressure within the pressure chamber at low speed.

• Assignee: Mitsubishi Jidosha Kogyo Kabushiki: Kaisha and Mitsubishi Denki Kabushiki: Kaisha, Tokyo
• Patent Number(s): US 4773379
• OSTI ID: 6672904
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACTUATORS
CONTROL EQUIPMENT
CONTROL SYSTEMS
DUCTS
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
POLLUTION CONTROL EQUIPMENT
PRESSURE DEPENDENCE
VALVES
WASTES