CN101586489A - The fresh air bypass of heat of cooling discharging under the dpf regeneration pattern - Google Patents

The fresh air bypass of heat of cooling discharging under the dpf regeneration pattern Download PDF

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Publication number
CN101586489A
CN101586489A CNA200910203073XA CN200910203073A CN101586489A CN 101586489 A CN101586489 A CN 101586489A CN A200910203073X A CNA200910203073X A CN A200910203073XA CN 200910203073 A CN200910203073 A CN 200910203073A CN 101586489 A CN101586489 A CN 101586489A
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CN
China
Prior art keywords
particulate filter
bypass channel
diesel particulate
engine
air
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA200910203073XA
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Chinese (zh)
Other versions
CN101586489B (en
Inventor
J·李
R·米塔尔
M·C·卢克汉
S·巴加瓦
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Publication date
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Publication of CN101586489A publication Critical patent/CN101586489A/en
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Publication of CN101586489B publication Critical patent/CN101586489B/en
Expired - Fee Related legal-status Critical Current
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/103—Oxidation catalysts for HC and CO only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Abstract

The present invention relates to the fresh air bypass of heat of cooling discharging under the dpf regeneration pattern, specifically, a kind of engine system comprises the diesel engine with discharge manifold, and described discharge manifold is connected to diesel engine.Discharge passage is connected to discharge manifold, and diesel particulate filter is arranged in the discharge passage.The air inlet passage is provided for to the diesel engine supplied fresh air.Bypass channel is connected between the discharge passage of air inlet passage and diesel particulate filter location downstream.Bypass channel comprises bypass control valve, and bypass control valve is used for opening and closing bypass channel in diesel particulate filter (DPF) regeneration cycle period during in low speed or idling when vehicle.

Description

The fresh air bypass of heat of cooling discharging under the dpf regeneration pattern
Technical field
[0001] the present invention relates to diesel engine system, thereby and relate more specifically to comprise the diesel engine system of fresh air bypass heat of cooling discharging under the diesel particulate filter (DPF) regeneration pattern when the low speed of a motor vehicle and idling.
Background technique
[0002] statement in this part only provides the background information relevant with the present invention and may not constitute prior art.
[0003], need diesel particulate filter usually to meet by Environmental Protection Agency (EPA) to reaching the granular material discharged target of vehicle setting afterwards in 2007 for diesel engine.Diesel particulate filter is in trap particulate matter during the normal operating conditions and must periodically regenerate during in the maximum discharge temperature under any operational condition.In general, depend on to be the selected work cycle of engine system that diesel particulate filter (DPF) regeneration is approximately 250 to 350 miles at interval.Yet, exporting the maximum discharge temperature that meets between 450 ℃ and 600 ℃ at tail pipe during the diesel particulate filter (DPF) regeneration during idling, this has caused safety problem.In order to address this problem, drain cooler or Jet injector are positioned on the outlet pipe in advance.Cooler is carried secretly surrounding atmosphere in the into hot driving and is reduced exhaust temperature.In order to carry the air of sufficient quantity secretly, the cooler orifice size is littler than outlet pipe diameter usually.This has limited discharge stream and has increased the extra back pressure to releasing system.Therefore this cause the fuel consumption that increases and be limited in issuable peak output under the rated condition.For any equipment that is increased to outlet pipe in the purpose of idling time cooling discharging all may increase back pressure under the rated condition potentially.
Summary of the invention
[0004] system of the present invention provides bypass, this bypass is used for: do not increasing under the back pressure situation, when idling and low-speed mode, during the diesel particulate filter (DPF) regeneration pattern, the hot driving after charge cooler outlet or inlet are sent to fresh air diesel particulate filter.Fresh air will mix and reduce the exhaust temperature in outlet port with the hot driving in the tail pipe.
[0005] further Applicable scope will become apparent from the description that provides at this.Should be appreciated that this description and specific examples only as purpose of illustration, are not intended to limit the scope of the invention.
Description of drawings
[0006] accompanying drawing described here only as purpose of illustration, is not intended to limit the scope of the invention by any way.
[0007] accompanying drawing 1 provides the schematic representation of engine system in accordance with the principles of the present invention, thereby it comprises fresh air bypass heat of cooling discharging under the diesel particulate filter (DPF) regeneration pattern when the low speed of a motor vehicle and idling.
Embodiment
[0008] Xia Mian description only is exemplary in essence, is not intended to limit the present invention, application or use.
[0009] with reference to the accompanying drawings, engine system 10 of the present invention will be described now.Engine system 10 comprises diesel engine 12, and diesel engine 12 comprises engine cylinder-body, and engine cylinder-body has the hole of a plurality of qualification cylinders 14.Air inlet manifold 16 is connected to motor and is used for providing inlet air to cylinder 14.Air inlet passage 18 is connected to air inlet manifold 16, and comprises the throttle family of power and influence 20 who is communicated with turbosupercharger 21 and the charger-air cooler 24 that is used for providing the cooling air of compression to motor 12.Variable-geometry (VG) turbo machine 32 that turbosupercharger 21 comprises the compressor 22 that is communicated with inlet air and is communicated with waste gas.
[0010] air gas exhaust manifold 28 is set to be communicated with the cylinder 14 of motor 12, and is connected to exhaust passage 30.VG turbo machine 32 is communicated with and Driven Compressor 22 with discharge passage 30.The turbosupercharger that has the varistructure turbo machine changes the output of turbo machine according to engine load.In this manner, Zui You boost pressure can be kept and optimum use can be formed by the energy in the waste gas.Cross section changes by replacement turbine bucket (less contact surface during low speed, bigger contact surface during high speed) and forms.VG turbine wheel pressurized machine is effective especially and elimination " turbo lag " when sub load.They increase engine power, increase the closure response and also have wholesome effect for particle emission.In addition, they have opened about the new approaches to the control of exhaust gas recirculation.Hot driving from engine cylinder makes the turbo machine rotation, thereby the turbine drives compressor makes the suction pressure supercharging.
[0011] exhaust gas recirculation passage 34 is provided with exhaust gas recirculation valve 36, and exhaust gas recirculation valve 36 waste gas of self-discharging passage 30 in the future sends back gas-entered passageway 18, and this is controlled by engine controller 50.Discharge passage 30 also comprises diesel oxidation catalyst (DOC) and NO X Equipment 40 and be used for diesel particulate filter 42 from the effulent filtration of particulate matters.Diesel oxidation catalyst conversion effulent with oxidation from HC, the CO of motor and NO and heat and necessary chemical species are offered the catalyst in downstream.NO XThe NO that equipment reduction motor is discharged XEffulent.By DOC, NO XThe diesel engine post-processing system that equipment and diesel particulate filter (DPF) are formed will be controlled harmful emissions from engines, for example hydrocarbon (HC), nitrogen oxide (NO X), particulate matter (PM) and carbon monoxide (CO) etc.
[0012] engine system 10 also comprises bypass channel 44, and bypass channel 44 can be communicated to the downstream side of diesel particulate filter 42 from the outlet side of charge cooler 24.Bypass channel 45 replacedly can be connected to the upstream side of charge cooler, and is shown in dotted line, and is connected to discharge passage 30 in the downstream side of diesel particulate filter 42.By-pass valve 48 is arranged in the bypass channel 44 and with engine controller 50 and is communicated with, and engine controller 50 is operated under the diesel particulate filter (DPF) regeneration pattern according to the work cycle control engine system of selecting 10.Diesel particulate filter 42 is captured in the particulate matter of carrying secretly in the diesel oil effulent on pottery or the metal substrate.At some some place, this particulate matter may be eliminated by regeneration, and by this process, the temperature of the discharging of the DPF that flows through reaches the adequate level of burning the particle of accumulating fully.In many cases, particularly under the situation that engine cycles or vehicle stop and starting in a large number, temperature may not can keep enough up to cycle sufficient time to the elimination particulate matter.Under these situations, need active system, temperature is elevated to is enough to burn particulate matter thereby most of active system is included in the discharge stream a spot of diesel fuel of burning.Initiatively dpf regeneration typically needs about 20-30 minute.Be under the diesel particulate filter (DPF) regeneration pattern in engine system 10, and when motor 12 is in idling or low speed (5mph or littler), engine controller 50 control by-pass valves 48 are to allow discharging tail pipe 52 from the fresh air of gas-entered passageway 18 around arriving, at discharging tail pipe 52, thereby fresh air mixes the exhaust temperature that reduction is provided in the outlet port of outlet pipe 52 with hot waste gas.Turbosupercharger 21 provides the pressure ratio exhaust gas pressure bigger pressurized air.
[0013] under the situation of using system of the present invention, do not have the increase of back pressure, this has caused lower fuel economy.In addition, in releasing system, do not have active part and under other drive conditions to not influence of engine performance.System also increases considerably less cost, only comprises extra bypass channel tubing and by-pass valve.Diesel particulate filter (DPF) regeneration circuit ability when the high pumping loss that is caused by the fresh charge air bypass has strengthened vehicle idling.

Claims (17)

1. engine system comprises:
Diesel engine;
The discharge passage that is communicated with waste gas from diesel engine;
Be arranged in the diesel particulate filter in the discharge passage;
Be used to supply air to the air inlet passage of diesel engine; With
Bypass channel, described bypass channel are connected between the discharge passage of air inlet passage and diesel particulate filter location downstream, and described bypass channel comprises the bypass control valve that is used to open and close bypass channel.
2. engine system as claimed in claim 1 also comprises the turbosupercharger that pressurized air is offered the air inlet passage.
3. engine system as claimed in claim 2, wherein, turbosupercharger offers charge cooler with pressurized air, and bypass channel is connected to the air inlet passage in the charge cooler downstream.
4. engine system as claimed in claim 2, wherein, described turbosupercharger offers charge cooler with pressurized air, and bypass channel is connected to the air inlet passage in turbosupercharger downstream and charge cooler upstream.
5. engine system as claimed in claim 2, wherein, pressurized air offers bypass channel, and compressed air pressure is bigger than the exhaust gas pressure in diesel particulate filter downstream position discharge passage.
6. engine system as claimed in claim 1, wherein, the air inlet passage comprises the throttle family of power and influence in bypass channel downstream.
7. engine system as claimed in claim 1, also comprise engine controller, described engine controller is used for periodically engine system operation under the diesel particulate filter (DPF) regeneration pattern, and is used for opening bypass control valve during the diesel particulate filter (DPF) regeneration pattern.
8. engine system as claimed in claim 1, also comprise engine controller, described engine controller is used for periodically engine system operation under the diesel particulate filter (DPF) regeneration pattern, and is used for being under the diesel particulate filter (DPF) regeneration pattern and motor is opened by-pass valve when being in idling at motor.
9. engine system as claimed in claim 1, also comprise engine controller, described engine controller is used for periodically engine system operation under the diesel particulate filter (DPF) regeneration pattern, and is used for being under the diesel particulate filter (DPF) regeneration pattern and motor impels by-pass valve to open during with per hour 5 miles speed or littler speed driving vehicle at motor.
10. discharge treating system that is used for motor comprises:
Be suitable for being connected to the discharge passage of motor;
Be arranged in the diesel particulate filter in the discharge passage;
Be suitable for air inlet passage to motor supply air;
Bypass channel, described bypass channel are connected between the discharge passage of air inlet passage and diesel particulate filter location downstream, and described bypass channel comprises the bypass control valve that is used to open and close bypass channel.
11. discharge treating system as claimed in claim 10 also comprises the turbosupercharger that pressurized air is offered the air inlet passage.
12. discharge treating system as claimed in claim 11, wherein, described turbosupercharger offers charge cooler with pressurized air, and bypass channel is connected to the air inlet passage in described charge cooler downstream.
13. discharge treating system as claimed in claim 11, wherein, described turbosupercharger offers charge cooler with pressurized air, and bypass channel is connected to the air inlet passage in turbosupercharger downstream and charge cooler upstream.
14. discharge treating system as claimed in claim 11, wherein, pressurized air offers bypass channel, and compressed air pressure is bigger than the exhaust gas pressure in the discharge passage of diesel particulate filter downstream position.
15. discharge treating system as claimed in claim 10, wherein, the air inlet passage comprises the throttle family of power and influence in bypass channel downstream.
16. a method comprises:
The diesel particulate filter that regeneration is communicated with waste gas from diesel engine;
Between the waste gas of inlet air source and diesel particulate filter downstream position, provide connection at regeneration period.
17. method as claimed in claim 17 also comprises and compresses the position that is fed to the air in inlet air source and pressurized air is provided to the diesel particulate filter downstream.
CN200910203073XA 2008-05-19 2009-05-19 Fresh air bypass to cool down hot exhaust in dpf regeneration mode Expired - Fee Related CN101586489B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/123016 2008-05-19
US12/123,016 US20090282816A1 (en) 2008-05-19 2008-05-19 Fresh Air Bypass to Cool Down Hot Exhaust in DPF Regeneration Mode at Low Vehicle Speed and Idle
US12/123,016 2008-05-19

Publications (2)

Publication Number Publication Date
CN101586489A true CN101586489A (en) 2009-11-25
CN101586489B CN101586489B (en) 2013-01-23

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CN (1) CN101586489B (en)
DE (1) DE102009020466A1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN102465733A (en) * 2010-11-18 2012-05-23 福特环球技术公司 Exhaust system for internal combustion engines with particle filter
CN114673580A (en) * 2022-04-12 2022-06-28 潍柴动力股份有限公司 Engine exhaust gas flow management system and control method

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CN113983609A (en) * 2020-07-10 2022-01-28 北京同方洁净技术有限公司 Double-channel air ventilation and purification device and air purification method thereof

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CN114673580A (en) * 2022-04-12 2022-06-28 潍柴动力股份有限公司 Engine exhaust gas flow management system and control method

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Publication number Publication date
CN101586489B (en) 2013-01-23
US20090282816A1 (en) 2009-11-19
DE102009020466A1 (en) 2009-12-24

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