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:

Mond, Alan; Jiang, Li

Issue Date:

Tue Sep 22 00:00:00 EDT 2015

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 F01 - MACHINES OR ENGINES IN GENERAL F01L - CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01L - CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES

F01L1/34 - characterised by the provision of means for changing the timing of the valves without changing the duration of opening {and without affecting the magnitude of the valve lift}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02B - INTERNAL-COMBUSTION PISTON ENGINES

F02B1/14 - Methods of operating
F02B29/04 - Cooling of air intake supply
F02B37/04 - Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
F02B37/12 - Control of the pumps
F02B37/183 - {Arrangements of bypass valves or actuators therefor}
F02B39/04 - Mechanical drives
F02B39/12 - Drives characterised by use of couplings or clutches therein

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02D - CONTROLLING COMBUSTION ENGINES

F02D13/0207 - {changing valve lift or valve lift and timing}
F02D2021/083 - {controlling exhaust gas recirculation electronically}
F02D2041/001 - {for engines with variable valve actuation}
F02D23/00 - Controlling engines characterised by their being supercharged
F02D41/0007 - {for control of turbo-charged or super-charged engines
F02D41/0057 - {Specific combustion modes
F02D41/006 - {using internal EGR
F02D41/3035 - {a mode being the premixed charge compression-ignition mode}
F02D41/3041 - {with means for triggering compression ignition, e.g. spark plug}
F02D41/3064 - {with special control during transition between modes}

F - MECHANICAL ENGINEERING F02 - COMBUSTION ENGINES F02M - SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF

F02M26/05 - High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
F02M26/23 - Layout, e.g. schematics

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

Y02T10/12 - Technologies for the improvement of indicated efficiency of a conventional ICE
Y02T10/40 - Engine management systems

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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