DEVICE FOR INTERNAL COMBUSTION ENGINE - HITACHI AUTOMOTIVE SYSTEMS LTD

Title:

DEVICE FOR INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2016/031507

Kind Code:

A1

Abstract:

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.

Inventors:

KUMANO KENGO (JP)
AKAGI YOSHIHIKO (JP)

Application Number:

PCT/JP2015/072155

Publication Date:

March 03, 2016

Filing Date:

August 05, 2015

Export Citation:

Click for automatic bibliography generation Help

Assignee:

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

International Classes:

F02D41/10; B60W10/06; B60W10/08; F02D11/10; F02D21/08; F02D23/00; F02D43/00; F02P5/15

Foreign References:

JP2013231371A	2013-11-14
JP2013011271A	2013-01-17
JP2000002122A	2000-01-07
JP2014015922A	2014-01-30

Other References: