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Title: Engine including hydraulically actuated valvetrain and method of valve overlap control

Abstract

An exhaust valve control method may include displacing an exhaust valve in communication with the combustion chamber of an engine to an open position using a hydraulic exhaust valve actuation system and returning the exhaust valve to a closed position using the hydraulic exhaust valve actuation assembly. During closing, the exhaust valve may be displaced for a first duration from the open position to an intermediate closing position at a first velocity by operating the hydraulic exhaust valve actuation assembly in a first mode. The exhaust valve may be displaced for a second duration greater than the first duration from the intermediate closing position to a fully closed position at a second velocity at least eighty percent less than the first velocity by operating the hydraulic exhaust valve actuation assembly in a second mode.

Inventors:
 [1]
  1. White Lake, MI
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1044047
Patent Number(s):
8,171,900
Application Number:
12/685,061
Assignee:
GM Global Technology Operations LLC NETL
DOE Contract Number:  
FC26-05NT42415
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Cowgill, Joel. Engine including hydraulically actuated valvetrain and method of valve overlap control. United States: N. p., 2012. Web.
Cowgill, Joel. Engine including hydraulically actuated valvetrain and method of valve overlap control. United States.
Cowgill, Joel. Tue . "Engine including hydraulically actuated valvetrain and method of valve overlap control". United States. https://www.osti.gov/servlets/purl/1044047.
@article{osti_1044047,
title = {Engine including hydraulically actuated valvetrain and method of valve overlap control},
author = {Cowgill, Joel},
abstractNote = {An exhaust valve control method may include displacing an exhaust valve in communication with the combustion chamber of an engine to an open position using a hydraulic exhaust valve actuation system and returning the exhaust valve to a closed position using the hydraulic exhaust valve actuation assembly. During closing, the exhaust valve may be displaced for a first duration from the open position to an intermediate closing position at a first velocity by operating the hydraulic exhaust valve actuation assembly in a first mode. The exhaust valve may be displaced for a second duration greater than the first duration from the intermediate closing position to a fully closed position at a second velocity at least eighty percent less than the first velocity by operating the hydraulic exhaust valve actuation assembly in a second mode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 08 00:00:00 EDT 2012},
month = {Tue May 08 00:00:00 EDT 2012}
}

Patent:

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