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Title: High speed exhaust gas recirculation valve

Abstract

In order to minimize pollutants such as Nox, internal combustion engines typically include an exhaust gas recirculation (EGR) valve that can be used to redirect a portion of exhaust gases to an intake conduit, such as an intake manifold, so that the redirected exhaust gases will be recycled. It is desirable to have an EGR valve with fast-acting capabilities, and it is also desirable to have the EGR valve take up as little space as possible. An exhaust gas recirculation valve is provided that includes an exhaust passage tube, a valve element pivotally mounted within the exhaust passage tube, a linear actuator; and a gear train. The gear train includes a rack gear operatively connected to the linear actuator, and at least one rotatable gear meshing with the rack gear and operatively connected to the valve element to cause rotation of the valve element upon actuation of the linear actuator. The apparatus provides a highly compact package having a high-speed valve actuation capability.

Inventors:
 [1];  [1]
  1. Peterborough, GB
Issue Date:
Research Org.:
Caterpillar Inc., Deerfield, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
968992
Patent Number(s):
6843239
Application Number:
10/036,832
Assignee:
Caterpillar Inc. (Peoria, IL)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
DOE Contract Number:  
FC05-97OR22605
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Fensom, Rod, and Kidder, David J. High speed exhaust gas recirculation valve. United States: N. p., 2005. Web.
Fensom, Rod, & Kidder, David J. High speed exhaust gas recirculation valve. United States.
Fensom, Rod, and Kidder, David J. Tue . "High speed exhaust gas recirculation valve". United States. https://www.osti.gov/servlets/purl/968992.
@article{osti_968992,
title = {High speed exhaust gas recirculation valve},
author = {Fensom, Rod and Kidder, David J},
abstractNote = {In order to minimize pollutants such as Nox, internal combustion engines typically include an exhaust gas recirculation (EGR) valve that can be used to redirect a portion of exhaust gases to an intake conduit, such as an intake manifold, so that the redirected exhaust gases will be recycled. It is desirable to have an EGR valve with fast-acting capabilities, and it is also desirable to have the EGR valve take up as little space as possible. An exhaust gas recirculation valve is provided that includes an exhaust passage tube, a valve element pivotally mounted within the exhaust passage tube, a linear actuator; and a gear train. The gear train includes a rack gear operatively connected to the linear actuator, and at least one rotatable gear meshing with the rack gear and operatively connected to the valve element to cause rotation of the valve element upon actuation of the linear actuator. The apparatus provides a highly compact package having a high-speed valve actuation capability.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {1}
}

Patent:

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