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Internal combustion engine with selective catalytic reduction system and corresponding method and device

A selective, internal combustion engine technology, applied to internal combustion piston engines, exhaust devices, charging systems, etc., can solve problems such as regulating exhaust gas

Active Publication Date: 2019-11-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, with the help of these parameters it is not always possible to adjust the amount of gas recirculated by the EGR system in such a way that the overall power of the ICE, which is also considered as a system including other exhaust gas reprocessing devices (e.g. SCR system)
[0011] In particular, it is not always possible to regulate the amount of exhaust gas recirculated by the EGR system in such a way that an effective balance is achieved between the emissions of nitrogen oxides into the environment and the smoke and soot produced by the ICE

Method used

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  • Internal combustion engine with selective catalytic reduction system and corresponding method and device
  • Internal combustion engine with selective catalytic reduction system and corresponding method and device
  • Internal combustion engine with selective catalytic reduction system and corresponding method and device

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Embodiment Construction

[0129] Some embodiments can include a motor vehicle system 100 that is figure 1 with 2 Is shown and has an internal combustion engine (ICE) 110 with an engine block 120 that defines at least one cylinder 125 by means of a piston 140 with a coupler or connector with which the crankshaft 145 is twisted. The cylinder head 130 works with the piston 140 to define a combustion chamber 150. The air-fuel mixture (not shown) is brought into the combustion chamber 150 and ignited, which causes thermal expansion of the combustion gas, which causes the piston 140 to move back and forth. Fuel is provided by at least one fuel injector 160 and air is provided through at least one inlet 210. The fuel is guided to the fuel injector 160 at high pressure from a fuel line 170 that is fluidly connected to a high-pressure pump 180 that increases the pressure of the fuel from the fuel source 190. Each cylinder 125 has at least two valves 215 driven by a camshaft 135 which is simultaneously twisted b...

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Abstract

The present invention is an internal combustion engine (110) with a selective catalytic reduction system (500), comprising a catalytic converter (510), an exhaust gas recirculation system (300) and an electronic control device (450), which is so designed : Determine the numerical value of the catalytic converter temperature (600), determine the numerical value of the amount of reducing agent (610) stored in the catalytic converter, based on the numerical value of the catalytic converter temperature (600) and the value stored in the catalytic converter Based on the numerical value of the amount of reducing agent (610) in the exhaust gas recirculation system (300), the amount of gas to be recirculated is adjusted. The invention also relates to a corresponding operating method and device.

Description

Technical field [0001] The invention relates to an internal combustion engine with a selective catalytic reduction system (SCR) and an exhaust gas recirculation system (EGR). Background technique [0002] It is known that modern internal combustion engines (ICE) include aftertreatment devices such as Diesel Oxidation Catalyst (DOC) and Diesel Particulate Filter (DPF), which are installed in the exhaust gas pipeline of the ICE in order to change the composition of the exhaust gas and thereby reduce harmful substances emission. [0003] Some ICEs can also include SCR systems and EGR systems, both of which are usually set up to reduce nitrogen oxide content. [0004] The SCR-system usually includes a catalytic converter arranged in the exhaust gas pipeline of the ICE, and includes a reductant injector arranged upstream of the catalytic converter. The injected reducing agent is stored in the catalytic converter in this way, where the reducing agent is used to convert nitrogen oxides in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F02D21/08F02M26/00
CPCF02D21/08F02D41/0235F02D41/0047F02D41/005F02D2200/0802F01N2900/0601F01N2900/1404F01N2900/1622F01N3/208F01N2610/02F01N2900/1602Y02T10/12Y02T10/40F02D41/0052
Inventor M.德卢纳
Owner GM GLOBAL TECH OPERATIONS LLC