Exhaust gas treatment device regeneration inhibiting fuel combustion in engine cylinder

Abstract

A method for an exhaust gas treatment device (8) in an engine system, and an engine system comprising an internal combustion engine with at least one cylinder (2) are presented. The engine system further comprises fuel injection means (11) and an exhaust gas treatment device (8). The method comprises performing a combustion inhibition exhaust gas treatment device regeneration (208, 209, 223, 224,225), comprising inhibiting combustion in at least one of the cylinders (2), and controlling the fuel injection means (11) so that fuel is allowed into at least one of the cylinders (2) in which combustion is inhibited.

Description

technical field

[0001] The invention relates to a method for an exhaust gas treatment device in an engine system comprising an internal combustion engine having at least one cylinder and a fuel injection device. The invention also relates to an engine system comprising an internal combustion engine having at least one cylinder and a fuel injection device, the engine system further comprising an engine control unit adapted to control the fuel injection device. Background technique

[0002] Modern cars are equipped with exhaust treatment devices called catalytic converters, which convert gases such as hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO x ) into toxic gases such as carbon dioxide (CO 2 ), nitrogen (N 2 ) and water (H 2 O) such substances. A known problem with catalytic converters is that certain species can remain on the inner surfaces of the catalytic converter, for example by physisorption or chemisorption, and degrade the performance of the c...

Examples

Embodiment Construction

[0029] FIG. 1 shows a schematic diagram of various parts of an automotive engine system 1 including an internal combustion engine. The engine comprises four cylinders 2 each having a reciprocating piston 3, only one of which is shown in FIG. 1 . It should be noted that the invention is applicable to engines having any number of cylinders. The communication between each cylinder 2 and the intake port 4 is controlled by at least one corresponding intake valve 5 , while the communication between each cylinder 2 and the exhaust port 6 is controlled by at least one corresponding exhaust valve 7 . Downstream of the cylinder 2 an exhaust gas treatment device 8 in the form of a catalytic converter is provided.

[0030] The engine system 1 also includes an engine control unit (ECU) 9 which may be provided as one unit, or as more than one logically interconnected physical unit. The ECU 9 is adapted to control an air flow control device including a throttle valve 10 , and a fuel inject...

technical field

[0001] The invention relates to a method for an exhaust gas treatment device in an engine system comprising an internal combustion engine having at least one cylinder and a fuel injection device. The invention also relates to an engine system comprising an internal combustion engine having at least one cylinder and a fuel injection device, the engine system further comprising an engine control unit adapted to control the fuel injection device. Background technique

[0002] Modern cars are equipped with exhaust treatment devices called catalytic converters, which convert gases such as hydrocarbons (HC), carbon monoxide (CO) and nitrogen oxides (NO x ) into toxic gases such as carbon dioxide (CO 2 ), nitrogen (N 2 ) and water (H 2 O) such substances. A known problem with catalytic converters is that certain species can remain on the inner surfaces of the catalytic converter, for example by physisorption or chemisorption, and degrade the performance of the c...

Examples

Embodiment Construction

[0029] FIG. 1 shows a schematic diagram of various parts of an automotive engine system 1 including an internal combustion engine. The engine comprises four cylinders 2 each having a reciprocating piston 3, only one of which is shown in FIG. 1 . It should be noted that the invention is applicable to engines having any number of cylinders. The communication between each cylinder 2 and the intake port 4 is controlled by at least one corresponding intake valve 5 , while the communication between each cylinder 2 and the exhaust port 6 is controlled by at least one corresponding exhaust valve 7 . Downstream of the cylinder 2 an exhaust gas treatment device 8 in the form of a catalytic converter is provided.

[0030] The engine system 1 also includes an engine control unit (ECU) 9 which may be provided as one unit, or as more than one logically interconnected physical unit. The ECU 9 is adapted to control an air flow control device including a throttle valve 10 , and a fuel inject...

Images