skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Air/fuel ratio regulator

Abstract

A description is given of an air/fuel ratio regulator for use with the fuel injection control system of an internal combustion engine of the spark ignition type having an air and exhaust gas (gas) induction passage open at one end to air at ambient pressure level and connected at its other end to the engine combustion chamber to be subject to manifold vacuum changes therein, a throttle valve rotatably mounted for movement across the passage to control the gas flow therethrough, exhaust gas recirculation (egr) passage means connecting engine exhaust gases to the induction passage above the closed position of the throttle valve, an egr flow control valve mounted in the egr passage means for movement between open and closed postions to control the volume of egr gas flow, an engine speed responsive positive displacement type fuel injection pump having a fuel flow output to the engine that varies in direct proportion to changes in engines speed to match fuel flow and mass airflow through the induction system of the engine over the entire speed and load range of the engine to maintain the intake mixture ratio of air to fuel constant, the pump having a fuel flow control levermore » movable to vary the fuel rate of flow, the regulator being characterized by engine manifold vacuum responsive first servo means operably connected to the fuel control lever for maintaining a constant air/fuel (A/F) ratio by changing fuel output as a function of changing manifold vacuum and air flow upon opening of the throttle valve, a fuel enrichment control lever operably connected to the pump control lever and movable to modify the position of the pump lever dictated by the first servo means to change the A/F ratio, and further means responsive to engine operating conditions for moving the fuel enrichment control lever to provide the changed A/F ratio.« less

Inventors:
Publication Date:
OSTI Identifier:
5013463
Patent Number(s):
US 4213435
Assignee:
Ford Motor Co
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 29 Aug 1978
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; FUEL INJECTION SYSTEMS; FUEL-AIR RATIO; CONTROL SYSTEMS; SPARK IGNITION ENGINES; EXHAUST RECIRCULATION SYSTEMS; FLOW REGULATORS; PISTONS; PUMPS; SHAFTS; TEMPERATURE DEPENDENCE; CONTROL EQUIPMENT; ENGINES; EQUIPMENT; EXHAUST SYSTEMS; FUEL SYSTEMS; HEAT ENGINES; INTERNAL COMBUSTION ENGINES; MACHINE PARTS; POLLUTION CONTROL EQUIPMENT; 330101* - Internal Combustion Engines- Spark-Ignition

Citation Formats

Simko, A. Air/fuel ratio regulator. United States: N. p., 1980. Web.
Simko, A. Air/fuel ratio regulator. United States.
Simko, A. Tue . "Air/fuel ratio regulator". United States.
@article{osti_5013463,
title = {Air/fuel ratio regulator},
author = {Simko, A},
abstractNote = {A description is given of an air/fuel ratio regulator for use with the fuel injection control system of an internal combustion engine of the spark ignition type having an air and exhaust gas (gas) induction passage open at one end to air at ambient pressure level and connected at its other end to the engine combustion chamber to be subject to manifold vacuum changes therein, a throttle valve rotatably mounted for movement across the passage to control the gas flow therethrough, exhaust gas recirculation (egr) passage means connecting engine exhaust gases to the induction passage above the closed position of the throttle valve, an egr flow control valve mounted in the egr passage means for movement between open and closed postions to control the volume of egr gas flow, an engine speed responsive positive displacement type fuel injection pump having a fuel flow output to the engine that varies in direct proportion to changes in engines speed to match fuel flow and mass airflow through the induction system of the engine over the entire speed and load range of the engine to maintain the intake mixture ratio of air to fuel constant, the pump having a fuel flow control lever movable to vary the fuel rate of flow, the regulator being characterized by engine manifold vacuum responsive first servo means operably connected to the fuel control lever for maintaining a constant air/fuel (A/F) ratio by changing fuel output as a function of changing manifold vacuum and air flow upon opening of the throttle valve, a fuel enrichment control lever operably connected to the pump control lever and movable to modify the position of the pump lever dictated by the first servo means to change the A/F ratio, and further means responsive to engine operating conditions for moving the fuel enrichment control lever to provide the changed A/F ratio.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {7}
}