A device of an internal-combustion engine

Japanese Patent JP6208097

B2

In the case of an internal combustion engine equipped with a turbocharger having a low-pressure EGR flow passage, an EGR rate inside a combustion chamber temporarily drops when accelerating from a high-EGR operation, resulting in the occurrence of knocking and poor emission due to a deviation in air-fuel ratio. A control device for an internal combustion engine according to the present invention is provided with: a turbocharger; a low-pressure EGR flow passage which connects an exhaust pipe disposed on the downstream side of a turbine of the turbocharger with an intake pipe disposed on the upstream side of a compressor of the turbocharger; a throttle valve for controlling the amount of gas flowing into cylinders; and an EGR valve which is disposed in the EGR flow passage in order to control an EGR flow rate. When acceleration is requested while operating at an EGR rate equal to or higher than a predetermined value, a control amount of the opening degree of the throttle valve with respect to the opening degree of an accelerator is set smaller than when acceleration is requested while operating at an EGR rate equal to or lower than the predetermined value.

Kengo Kumano
Yoshihiko Akagi

JP2014174721A

October 04, 2017

August 29, 2014

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Hitachi Automotive Systems, Ltd.

F02D41/10; B60W10/06; B60W10/08; B60W20/00; F02B37/18; F02D9/02; F02D11/10; F02D13/02; F02D21/08; F02D23/00; F02D43/00; F02M26/06; F02M26/53; F02P5/15

JP2013231371A
JP2013011271A
JP2000002122A
JP2014015922A

Yuji Toda

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