INTERNAL COMBUSTION ENGINE SYSTEM AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE SYSTEM

Japanese Patent JP2017040215

A

PROBLEM TO BE SOLVED: To suppress deterioration of combustion stability in a deceleration state during EGR control.SOLUTION: An internal combustion engine system 100 includes a first intake passage 2, a first exhaust passage 3 and a throttle chamber 4. The internal combustion engine system further includes: an exhaust recirculation passage 8 for communicating a downstream side of a turbine 5B with an upstream side of a compressor 5A; an exhaust recirculation amount control valve 10; and a second intake passage 11 for communicating a downstream side of the throttle chamber 4 with an upstream side of a merging portion with the exhaust recirculation passage 8 of the first intake passage 2. A first intake throttle valve 12 is disposed in the second intake passage 11, and a check valve 13 is disposed in the second intake passage 11. A control section controls the throttle chamber 4 in the closing direction and controls the first intake throttle valve 12 in the opening direction when decrease amount of a required exhaust recirculation rate reaches predetermined amount or more, and opens the check valve 13 when inner pressure of the first intake passage 2 downstream of the throttle chamber 4 becomes lower than that of the second intake passage 11.SELECTED DRAWING: Figure 1

TERAYAMA KAZUHIRO
HAMAMOTO TAKAYUKI
OBARA TETSUYA

JP2015162667A

February 23, 2017

August 20, 2015

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NISSAN MOTOR

F02D21/08; F02B37/00; F02B37/16; F02D23/00; F02D43/00; F02M26/00; F02M26/02; F02M26/14

JP2015010591A	2015-01-19
JP2014020246A	2014-02-03
JP2008180175A	2008-08-07

WO2011161980A1

2011-12-29

Goto Patent Office
Masaki Goto
Masaaki Iida
Kenji Murase
Yasushi Kamiya

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