Exhaust purification system of internal combustion engine
First Claim
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1. An exhaust purification system of an internal combustion engine comprising:
- a filter arranged in an exhaust passage of the internal combustion engine and trapping particulate matter contained in exhaust gas,an oxidation catalyst arranged in the exhaust passage at an upstream side from the filter in a direction of exhaust flow,a fuel feed device comprising one or more of an exhaust fuel injector and a cylinder fuel injector feeding fuel to the oxidation catalyst, anda control device configured to control the feed of fuel by the fuel feed device, wherein the control device is configured to feed liquid state fuel from the fuel feed device to the oxidation catalyst so as to remove particulate matter deposited on the oxidation catalyst when judging that a percentage of soluble organic fractions (SOF) in particulate matter deposited on the oxidation catalyst is a predetermined value or less.
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Abstract
The exhaust purification system of an internal combustion engine 1 comprises: a catalyst 28 arranged in an exhaust passage 27 of the internal combustion engine, a fuel feed device 3, 35 feeding fuel to the catalyst, and a control device 80 configured to control the feed of fuel by the fuel feed device. The control device is configured to feed liquid state fuel from the fuel feed device to the catalyst when judging that a ratio of high viscosity components in particulate matter deposited on the catalyst is a predetermined value or less.
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Citations
18 Claims
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1. An exhaust purification system of an internal combustion engine comprising:
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a filter arranged in an exhaust passage of the internal combustion engine and trapping particulate matter contained in exhaust gas, an oxidation catalyst arranged in the exhaust passage at an upstream side from the filter in a direction of exhaust flow, a fuel feed device comprising one or more of an exhaust fuel injector and a cylinder fuel injector feeding fuel to the oxidation catalyst, and a control device configured to control the feed of fuel by the fuel feed device, wherein the control device is configured to feed liquid state fuel from the fuel feed device to the oxidation catalyst so as to remove particulate matter deposited on the oxidation catalyst when judging that a percentage of soluble organic fractions (SOF) in particulate matter deposited on the oxidation catalyst is a predetermined value or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification