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US20090183494: Control Method of Exhaust Gas Purification System and Exhaust Gas Purification System

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Filing Information

Inventor(s) Takuro Iwashita · Tetsuya Murata · Takashi Ikeda · Tatsuo Mashiko ·
Assignee(s) ISUZU MOTORS LIMITED ·
Correspondent STAAS & HALSEY LLP ·
Application Number US12227901
Filing date 05/14/2007
PCT 371 date 12/02/2008
Publication date 07/23/2009
Predicted expiration date 05/14/2027
U.S. Classifications 602/86  · 602/97  · 602/99  · 602/95  ·
International Classifications F01N300  · F01N310  · F01N900  ·
Kind CodeA1
PCT Application Number WO20PCTJP2007059867 - 05/14/2007
Foreign Priority JP2006163038 - 06/13/2006 ·
8 Claims, 7 Drawings


Abstract

In forced regeneration control of an exhaust gas purification device 12, the number of data for injection control such as the number of meshes of a data map and the number of data maps for multi injection control is decreased while occurrence of torque shock, which is a rapid fluctuation of a generated torque, is avoided. In the forced regeneration control of the exhaust gas purification device 12, when an operation state of an internal combustion engine 10 is a high-load operation state, the normal injection control by stopping the multi injection is carried out and according to a rotation speed Ne and a load Q of the internal combustion engine 10, a region for control is divided into a multi-injection control region Rm, a transition region Rt, and a normal injection control region Rn, and in the transition region Rt, data Ft(i) for injection control obtained by interpolation of data Fml(i) for injection control on the multi-injection control region Rm side and data Fnl(i) for injection control on the normal injection control region Rn side is used.

Independent Claims | See all claims (8)

  1. 1. A control method of an exhaust gas purification system comprising an exhaust gas purification device having an oxidation catalyst device carrying an oxidation catalyst on the upstream side or an exhaust gas purification device carrying an oxidation catalyst in an exhaust passage of an internal combustion engine and a controller for carrying out forced regeneration control for recovering purification capability of said exhaust gas purification device, in which at forced regeneration control, the controller executes multi injection control in order to raise an exhaust temperature, wherein at said forced regeneration control, if an operation state of the internal combustion engine is a high-load operation state, normal injection control is executed by stopping the multi injection, a region for control is divided into a multi-injection control region, a transition region, and a normal injection control region according to a rotation speed and a load of the internal combustion engine, and in the transition region, in-cylinder fuel injection is carried out using data for injection control obtained by interpolation of data for injection control of the multi-injection control on the multi-injection control region side and data for injection control of the normal injection control on the normal injection control region side.
  2. 5. An exhaust gas purification system in a control method of an exhaust gas purification system comprising an exhaust gas purification device having an oxidation catalyst device carrying an oxidation catalyst on the upstream side or an exhaust gas purification device carrying an oxidation catalyst in an exhaust passage of an internal combustion engine and a controller for carrying out forced regeneration control for recovering purification capability of the exhaust gas purification device, in which at forced regeneration control, the controller executes multi injection control in order to raise an exhaust temperature, wherein at said forced regeneration control, said controller executes the normal injection control by stopping the multi injection when the operation state of the internal combustion engine is a high-load operation state and according to a rotation speed and a load of the internal combustion engine, a region for control is divided into a multi-injection control region, a transition region, and a normal injection control region, and in the transition region, using data for injection control obtained by interpolation of the data for injection control of the multi injection control on the multi injection control region side and the data for injection control of the normal injection control on the normal injection control region side so that in-cylinder fuel injection is carried out.

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Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8205606 International Engine Intellectual Property Company, LLC Rogelio Rodriguez et al. Jun 2012

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