INTERNAL COMBUSTION ENGINE CONTROL DEVICE

Title:

INTERNAL COMBUSTION ENGINE CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/132589

Kind Code:

A1

Abstract:

The amount of heat (Qg) of low-pressure EGR gas is calculated (step (ST1)) in respect of an engine comprising an LPL-EGR mechanism whereby low-pressure EGR gas is recirculated from the DPF-downstream side of the exhaust system through an EGR cooler to the air intake system. The permissible amount of heat (Qw1) of the EGR cooler cooling water is calculated (step (ST2)), by a calculation formula taking as a variable the difference of the cooling water boiling threshold value (Tm) and the temperature (Ta) of the cooling water flowing into the low-pressure EGR cooler. Also, the permissible amount of heat (Qw2) of the EGR cooler cooling water is calculated (step (ST2)) by a calculation formula taking as a variable the temperature (Ta) of the cooling water flowing into the low-pressure EGR cooler. If at least one of: that the aforementioned permissible amount of heat (Qw1) is less than prescribed; or that the aforementioned permissible amount of heat (Qw2) is less than the amount of heat (Qg) of the low-pressure EGR gas, is found to be true, a correction is effected in respect of reduction of the amount of low-pressure EGR gas, so as to prevent boiling of the cooling water by reducing the amount of heat received by the cooling water.

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Inventors:

HOSOGI TAKAYUKI (JP)

Application Number:

PCT/JP2012/055648

Publication Date:

September 12, 2013

Filing Date:

March 06, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
HOSOGI TAKAYUKI (JP)

International Classes:

F02M25/07

Foreign References:

JP2010090773A	2010-04-22
JP2010247644A	2010-11-04
JP2011089470A	2011-05-06

Attorney, Agent or Firm:

ARC PATENT ATTORNEYS' OFFICE (JP)
Patent business corporation ARC PATENT ATTORNEYS' OFFICE (JP)

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