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Title: Solenoid valve control for exhaust gas recirculation

Abstract

A solenoid control valve for use in exhaust gas recirculation systems designed to minimize nitrogen oxide emissions from internal combustion engines is designed to open and close each engine cycle with the opening time being in accordance with engine operation conditions, as opposed to conventional systems in which the valve gradually opens and closes in response to a selected engine condition. The solenoid valve in the exhaust gas recirculation passage is controlled by an electrical circuit so as to be energized to the open position in accordance with engine speed, with a means being included for varying the energization time in response to manifold pressure. The circuit includes an amplifier for energizing and deenergizing the solenoid during each engine cycle, a pressure transducer positioned at the intake passage downstream of the throttle for responding to absolute pressure at the intake passage, and a means for responding to the transducer and for controlling the amplifier energization.

Inventors:
Publication Date:
OSTI Identifier:
7357234
Patent Number(s):
US 3799133
Assignee:
General Motors Corp.
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 22 Jun 1972
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; EXHAUST RECIRCULATION SYSTEMS; VALVES; INTERNAL COMBUSTION ENGINES; ACTUATORS; CONTROL SYSTEMS; DESIGN; ELECTRONIC CIRCUITS; PRESSURE DEPENDENCE; SOLENOIDS; CONTROL EQUIPMENT; ELECTRIC COILS; ELECTRICAL EQUIPMENT; ENGINES; EQUIPMENT; EXHAUST SYSTEMS; FLOW REGULATORS; POLLUTION CONTROL EQUIPMENT; 330701* - Emission Control- Nitrogen Oxides

Citation Formats

Frank, D L. Solenoid valve control for exhaust gas recirculation. United States: N. p., 1974. Web.
Frank, D L. Solenoid valve control for exhaust gas recirculation. United States.
Frank, D L. Tue . "Solenoid valve control for exhaust gas recirculation". United States.
@article{osti_7357234,
title = {Solenoid valve control for exhaust gas recirculation},
author = {Frank, D L},
abstractNote = {A solenoid control valve for use in exhaust gas recirculation systems designed to minimize nitrogen oxide emissions from internal combustion engines is designed to open and close each engine cycle with the opening time being in accordance with engine operation conditions, as opposed to conventional systems in which the valve gradually opens and closes in response to a selected engine condition. The solenoid valve in the exhaust gas recirculation passage is controlled by an electrical circuit so as to be energized to the open position in accordance with engine speed, with a means being included for varying the energization time in response to manifold pressure. The circuit includes an amplifier for energizing and deenergizing the solenoid during each engine cycle, a pressure transducer positioned at the intake passage downstream of the throttle for responding to absolute pressure at the intake passage, and a means for responding to the transducer and for controlling the amplifier energization.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1974},
month = {3}
}