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Title: Combustion mode switching with a turbocharged/supercharged engine

Abstract

A method for switching between low- and high-dilution combustion modes in an internal combustion engine having an intake passage with an exhaust-driven turbocharger, a crankshaft-driven positive displacement supercharger downstream of the turbocharger and having variable boost controllable with a supercharger bypass valve, and a throttle valve downstream of the supercharger. The current combustion mode and mass air flow are determined. A switch to the target combustion mode is commanded when an operating condition falls within a range of predetermined operating conditions. A target mass air flow to achieve a target air-fuel ratio corresponding to the current operating condition and the target combustion mode is determined. The degree of opening of the supercharger bypass valve and the throttle valve are controlled to achieve the target mass air flow. The amount of residual exhaust gas is manipulated.

Inventors:
;
Issue Date:
Research Org.:
Robert Bosch GmbH, Stuttgart (Germany)
Sponsoring Org.:
USDOE
OSTI Identifier:
1215834
Patent Number(s):
9140199
Application Number:
13/679,010
Assignee:
Robert Bosch GmbH (Stuttgart, DE)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES
F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
DOE Contract Number:  
EE0003533
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Nov 16
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS

Citation Formats

Mond, Alan, and Jiang, Li. Combustion mode switching with a turbocharged/supercharged engine. United States: N. p., 2015. Web.
Mond, Alan, & Jiang, Li. Combustion mode switching with a turbocharged/supercharged engine. United States.
Mond, Alan, and Jiang, Li. Tue . "Combustion mode switching with a turbocharged/supercharged engine". United States. https://www.osti.gov/servlets/purl/1215834.
@article{osti_1215834,
title = {Combustion mode switching with a turbocharged/supercharged engine},
author = {Mond, Alan and Jiang, Li},
abstractNote = {A method for switching between low- and high-dilution combustion modes in an internal combustion engine having an intake passage with an exhaust-driven turbocharger, a crankshaft-driven positive displacement supercharger downstream of the turbocharger and having variable boost controllable with a supercharger bypass valve, and a throttle valve downstream of the supercharger. The current combustion mode and mass air flow are determined. A switch to the target combustion mode is commanded when an operating condition falls within a range of predetermined operating conditions. A target mass air flow to achieve a target air-fuel ratio corresponding to the current operating condition and the target combustion mode is determined. The degree of opening of the supercharger bypass valve and the throttle valve are controlled to achieve the target mass air flow. The amount of residual exhaust gas is manipulated.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {9}
}

Patent:

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