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Title: Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines

Abstract

A fuel supply and metering valve assembly used for injection of fuel to an internal combustion engine includes a control pressure circuit which determines the restoring force on the movable member of the fuel metering valve. The magnitude of the control pressure, and hence the fuel quantity metered out by the valve assembly can be altered by the intermittent actuation of a pressure relief valve which controls a fluid bypass. The duty cycle of the intermittently acting bypass valve is controlled by a regulating device which responds to the indications of measuring transducers, for example an oxygen probe located in the exhaust line of the engine. The transducer signal is superimposed on a sawtooth voltage at the input of a differential amplifier which interacts with other control circuitry so as to vary the length of time during which the electromagnetic bypass valve is energized.

Inventors:
Publication Date:
OSTI Identifier:
7143012
Patent Number(s):
US 3981288
Assignee:
Robert Bosch GmbH
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 13 May 1974, German, Federal Republic of (F.R. Germany)
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; INTERNAL COMBUSTION ENGINES; FUEL SYSTEMS; POLLUTION CONTROL EQUIPMENT; DESIGN; BYPASSES; CONTROL SYSTEMS; EXHAUST GASES; FUEL INJECTION SYSTEMS; MONITORING; PRESSURE DEPENDENCE; TRANSDUCERS; VALVES; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; FLOW REGULATORS; GASEOUS WASTES; WASTES; 330700* - Advanced Propulsion Systems- Emission Control; 330603 - Vehicle Design Factors- Engine System

Citation Formats

Wessel, W. Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines. United States: N. p., 1976. Web.
Wessel, W. Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines. United States.
Wessel, W. 1976. "Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines". United States.
@article{osti_7143012,
title = {Apparatus for reducing the toxic components in the exhaust gas of internal combustion engines},
author = {Wessel, W},
abstractNote = {A fuel supply and metering valve assembly used for injection of fuel to an internal combustion engine includes a control pressure circuit which determines the restoring force on the movable member of the fuel metering valve. The magnitude of the control pressure, and hence the fuel quantity metered out by the valve assembly can be altered by the intermittent actuation of a pressure relief valve which controls a fluid bypass. The duty cycle of the intermittently acting bypass valve is controlled by a regulating device which responds to the indications of measuring transducers, for example an oxygen probe located in the exhaust line of the engine. The transducer signal is superimposed on a sawtooth voltage at the input of a differential amplifier which interacts with other control circuitry so as to vary the length of time during which the electromagnetic bypass valve is energized.},
doi = {},
url = {https://www.osti.gov/biblio/7143012}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {9}
}