Title:
EGR SYSTEM
Document Type and Number:
Japanese Patent JP2018204519
Kind Code:
A
Abstract:
To execute EGR by dehumidifying EGR gas from cold time by using a relatively simple configuration.SOLUTION: An EGR system includes: an EGR passage 22; an EGR valve 23; an EGR cooler 24; a first EGR cooling water passage (each passage section 44, 46, 47, 48) for returning cooling water flowing out from an engine 1 to a cooling water passage 36 via the EGR cooler 24 to the passage 36; a second EGR cooling water passage (each passage section 44, 45, 48, 49) for returning cooling water flowing out from a radiator 32 to the cooling water passage 36 via the EGR cooler 24 to the passage 36; three-way valves 43, 50 for switching a flow of the cooling water to the EGR cooler 24 between the first EGR cooling water passage and the second EGR cooling water passage; a second water pump 42; and an electronic control unit (ECU) 60. At cold time in a warming-up process, in order to dehumidify EGR gas flowing in the EGR cooler 24, the ECU 60 opens the EGR valve 23 and controls the three-way valves 43, 50 to switch the flow of the cooling water to the EGR cooler 24 to the second EGR cooling water passage.SELECTED DRAWING: Figure 1
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Inventors:
YOSHIOKA MAMORU
Application Number:
JP2017109938A
Publication Date:
December 27, 2018
Filing Date:
June 02, 2017
Export Citation:
Assignee:
AISAN IND
International Classes:
F02M26/50; F01P3/20; F01P7/16; F02D21/08; F02M26/28
Domestic Patent References:
| JP2013127224A | 2013-06-27 | |||
| JP2014148957A | 2014-08-21 | |||
| JP2007263034A | 2007-10-11 | |||
| JP2016211409A | 2016-12-15 | |||
| JP2016223319A | 2016-12-28 | |||
| JP2017036695A | 2017-02-16 |
Attorney, Agent or Firm:
Patent Business Corporation Cosmos Patent Office