Title:
INTERNAL COMBUSTION ENGINE COOLING CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2019039339
Kind Code:
A
Abstract:
To suppress a rise of an EGR gas temperature after changeover to a full-cylinder operation from a reduced-cylinder operation.SOLUTION: A cooling control device is employed to an engine 1 which has a normal flow passage 40a having a region which adjoins a normal cylinder 5a so as to be heat-exchangeable therewith, and making cooling water circulate in an EGR cooler 32, and a pausable flow passage 40b having a region which adjoins the pausable cylinder 5b so as to be heat-exchangeable therewith, and making cooling water circulate in the EGR cooler 32. The cooling control device sets a flow rate of cooling water flowing to the normal flow passage 40 to a first flow rate during a full-cylinder operation and a reduced-cylinder operation by using a cooling water opening/closing valve 43a which is arranged in the normal flow passage 40a, and when there arises a changeover requirement to the full-cylinder operation even during the reduced-cylinder operation, the cooling control device sets the flow rate to a second flow rate lower than the first flow rate over a prescribed standby time tw before a start of the combustion of the pausable cylinder 5b.SELECTED DRAWING: Figure 1
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Inventors:
SEKIGUCHI AKIRA
Application Number:
JP2017161311A
Publication Date:
March 14, 2019
Filing Date:
August 24, 2017
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F02D17/02; F01P3/02; F01P3/20; F01P7/14
Attorney, Agent or Firm:
Haruhisa Kinutani
Hiroyuki Hashiyama
Hiroyuki Hashiyama