Vehicular post-treatment system and vehicular post-treatment method
A technology for vehicles and exhaust systems, applied in the directions of output power, mechanical equipment, engine components, etc., can solve the problem of no self-regeneration, and achieve the effect of reducing fuel consumption
Active Publication Date: 2019-04-26
ISUZU MOTORS LTD
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Problems solved by technology
[0005] However, for example, when the operating state of the internal combustion engine is in the middle-load region or the low-load region, and the exhaust gas temperature is lower than the combustion temperature of PM, as when traveling at a moderate speed or lower, self-regeneration is not performed, and the filter Gradually accumulate PM
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[0032] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0033] figure 1 It is a figure which shows the overall structure of the after-treatment system 1 for vehicles in embodiment of this invention.
[0034] exist figure 1 Among them, the aftertreatment system 1 is mounted on a vehicle, and includes: an internal combustion engine 100 as a control object, an exhaust system 200, an intake system 300, and an engine control unit (Engine Control Unit, hereinafter referred to as ECU) 400 (corresponding to this Invention of the "control section").
[0035] The internal combustion engine 100 is, for example, a diesel engine with a four-stroke cycle of an intake stroke, a compression stroke, an expansion stroke (combustion stroke), and an exhaust stroke, and includes a combustion chamber 102, an injector 104, an intake valve 106, an exhaust valve 108, and Variable valve mechanism 110 .
[0036] The combustion chamber 102 is a spa...
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This vehicular post-treatment system capable of reducing fuel consumption is provided with: a filter which is provided in an exhaust system connected to an exhaust valve that opens and closes an exhaust port provided on a cylinder and which captures particulate matter contained in an exhaust air discharged through the exhaust port; a variable valve mechanism which adjusts an open period of the exhaust valve between a maximum advance angle open period and a maximum retard angle open period; a temperature detection unit which detects the exhaust temperature in the exhaust system; a first temperature calculation unit which calculates a first temperature, which is the exhaust temperature when the open period of the exhaust valve is adjusted to the maximum advance angle open period; and a control unit which determines, when the detected exhaust temperature is lower than the combustion temperature of the particulate matter, whether or not the first temperature is equal to or higher than thecombustion temperature, and when the first temperature is equal to or higher than the combustion temperature, controls the variable valve mechanism so that the open period of the exhaust valve is adjusted to the maximum advance angle open period.
Description
technical field [0001] The present invention relates to a vehicle aftertreatment system and a vehicle aftertreatment method. Background technique [0002] Exhaust gas generated by the internal combustion engine of the vehicle is processed by a post-processing device provided in the middle of the exhaust flow path before being discharged into the atmosphere from the vehicle. [0003] When the internal combustion engine is a diesel engine, examples of post-processing devices include DPF (Diesel Particulate Filter) and urea SCR (Urea Selective Catalytic Reduction). [0004] The DPF (hereinafter, referred to as a filter) traps particulate matter (hereinafter referred to as PM) contained in exhaust gas. For example, when the operating state of the internal combustion engine is in a high-load region as in high-speed driving, and the exhaust gas temperature is higher than the combustion temperature of PM, PM accumulated in the filter is combusted and removed (so-called self-regene...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F01N3/023F01N3/025F01N3/033F02D13/02
CPCF01N3/023F01N3/025F01N3/033F02D13/02Y02T10/12
Inventor 田中大二郎
Owner ISUZU MOTORS LTD