JPH0328566B2 - - Google Patents
Info
- Publication number
- JPH0328566B2 JPH0328566B2 JP20452782A JP20452782A JPH0328566B2 JP H0328566 B2 JPH0328566 B2 JP H0328566B2 JP 20452782 A JP20452782 A JP 20452782A JP 20452782 A JP20452782 A JP 20452782A JP H0328566 B2 JPH0328566 B2 JP H0328566B2
- Authority
- JP
- Japan
- Prior art keywords
- electric heater
- trap
- battery
- particulate
- computer
- Prior art date
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F01N3/021—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 filters
- F01N3/023—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 filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/027—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 filters using means for regenerating the filters, e.g. by burning trapped particles using electric or magnetic heating means
-
- 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
- F01N3/021—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 filters
- F01N3/031—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 filters having means for by-passing filters, e.g. when clogged or during cold engine start
- F01N3/032—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 filters having means for by-passing filters, e.g. when clogged or during cold engine start during filter regeneration only
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
Description
【発明の詳細な説明】
本発明は、デイーゼルエンジンの微粒子浄化装
置に関し、とくに該微粒子浄化装置に設けた電気
ヒータに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a particulate purification device for a diesel engine, and particularly to an electric heater provided in the particulate purification device.
デイーゼルエンジンから排出された排気ガスは
その排気通路に配設されたトラツプに通され、排
気ガス中に含まれた煤等の微粒子（以下パテイキ
ユレートという）がトラツプを構成するセラミツ
クス多孔質体から成る捕集材により捕集される。
トラツプには時間の経過につれてパテイキユレー
トが蓄積し、圧力損失が増大してエンジンの出力
損失を増大させるので、パテイキユレートがある
程度蓄積した段階で、パテイキユレートを焼却除
去してトラツプを再生する必要がある。 Exhaust gas discharged from a diesel engine is passed through a trap installed in the exhaust passage, and particulates such as soot contained in the exhaust gas (hereinafter referred to as particulates) are trapped in a trap made of porous ceramic material. Collected by collecting wood.
Particulate matter accumulates in the trap over time, increasing pressure loss and increasing engine output loss. Therefore, when a certain amount of particulate matter has accumulated, it is necessary to incinerate and remove the particulate matter to regenerate the trap.
この再生は、捕集材の上流側端面部に電気ヒー
タを配して該電気ヒータで直接パテイキユレート
に着火させて燃焼させるか、または吸・排気を絞
つて捕集材を通過する排気ガスをパテイキユレー
ト燃焼温度以上に上昇させ、この高温化した排気
ガスによりパテイキユレートを燃焼させるかによ
つて行なわれる。そして、この電気ヒータの電源
には、ヘツドランプや、テールランプ、その他車
輌の電気機器の電源と同じバツテリが用いられて
いる。電気ヒータへの通電は比較的多くの電力を
消費するので、バツテリの充電量が十分でないと
きに、トラツプ再生のための電気ヒータへの通電
が行なわれると、バツテリがあがつてしまい、他
の電気機器の作動に支障をきたすおそれがある。 This regeneration can be carried out either by placing an electric heater on the upstream end of the collection material and using the electric heater to directly ignite the particulate and combust it, or by restricting the suction and exhaust air and directing the exhaust gas passing through the collection material into particulate. This is done by raising the temperature above the combustion temperature and burning the particulate with the heated exhaust gas. The electric heater uses the same battery as the power source for head lamps, tail lamps, and other electrical equipment in the vehicle. Powering the electric heater consumes a relatively large amount of power, so if the electric heater is turned on for trap regeneration when the battery is not fully charged, the battery will overheat and other It may interfere with the operation of electrical equipment.
本発明は、トラツプ再生用電気ヒータを備えた
デイーゼルエンジンにおける電気ヒータ通電によ
るバツテリの上りを防止し、バツテリへの負荷を
軽減することを目的とするものである。 SUMMARY OF THE INVENTION An object of the present invention is to prevent the battery from rising due to energization of the electric heater in a diesel engine equipped with an electric heater for trap regeneration, and to reduce the load on the battery.
この目的を達成するために、本発明のデイーゼ
ルエンジンの微粒子浄化装置においては、トラツ
プに設置した電気ヒータがコンピユータに接続さ
れており、通電時期がコンピユータによつて制御
されるようになつている。そして、トラツプの再
生時期となつて、電気ヒータに通電する時にオル
タネータから供給される電力に余裕のある時に通
電を開始する。つまり、エンジン回転数がある回
転数以上になつて低速回転域を脱したときに通電
を開始する。また、通電中に、ある回転数以下が
長時間続いているならば、電気ヒータへの通電を
切断する。こうすることによつて、バツテリへの
負荷が軽減され、バツテリのあがりを回避するこ
とができる。従来からも電気ヒータに通電してパ
テイキユレートに着火させるという技術は存在し
ていたが、従来はトラツプのみに限られていたの
であり、本発明のように車輌の他の機器との関連
において電気ヒータへの通電が制御されたものは
なく、エンジン回転数と関連づけることによつて
バツテリのあがりが防止される。 To achieve this objective, in the diesel engine particulate purification device of the present invention, an electric heater installed in the trap is connected to a computer, and the timing of energization is controlled by the computer. Then, when it is time to regenerate the trap, energization is started when there is enough power supplied from the alternator to energize the electric heater. That is, when the engine rotation speed reaches a certain rotation speed or higher and leaves the low speed rotation range, energization is started. Further, if the rotation speed continues to be below a certain level for a long time while the electric heater is being energized, the energization to the electric heater is cut off. By doing so, the load on the battery can be reduced, and it is possible to avoid the battery from rising. The technology of igniting particulate by energizing an electric heater has existed in the past, but it was previously limited to traps only, and as in the present invention, the technology of igniting particulate by applying electricity to an electric heater has existed. There is no control over the energization of the engine, and by linking it to the engine speed, battery drain can be prevented.
以下に、本発明のデイーゼルエンジンの微粒子
浄化装置の望ましい実施例を図面を参照して説明
する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the diesel engine particulate purifying device of the present invention will be described below with reference to the drawings.
第１図は本発明に係るデイーゼルエンジンの微
粒子浄化装置の一実施例の系統を示している。図
中、１はデイーゼルエンジン排気通路で、２は排
気ガス中のパテイキユレートを捕集するためのト
ラツプである。トラツプ２にはバイパス通路３が
設けられており、このバイパス通路３にはバイパ
スバルブ４が配設されている。バイパスバルブ４
の開閉はダイアフラム５で行なわれ、ダイアフラ
ム５の作動はVSV６，７によつて行なわれる。
一方のVSV６はバキユームポンプにつながり、
他方のVSV７は大気へとつながる。トラツプ２
には捕集材８が装入されており、その上流側にパ
テイキユレートに着火するための電気ヒータ９が
設けられている。この電気ヒータ９はボデーアー
スされている。また、トラツプ２には温度検出セ
ンサ１０が設けられ、たとえば入ガス温度が検知
される。電気ヒータ９の電気回路には、バツテリ
１１と、電気ヒータ９への通電をオンオフするリ
レー１２が設けられる。再生はコンピユータ１３
（ECU）によつて制御される。ECU１３によつて
再生時期がきたことが判断されると、バイパスバ
ルブ４がVSV６，７を作動することにより開か
れ、リレー１２がオンして電気ヒータ９に通電さ
れ、その後トラツプ２を流れる排気ガス流量をバ
イパスバルブ４の開閉で制御し再生が行なわれ
る。コンピユータ１３はこの制御機能を有してい
る。 FIG. 1 shows a system of an embodiment of a diesel engine particulate purification device according to the present invention. In the figure, 1 is a diesel engine exhaust passage, and 2 is a trap for collecting particulate matter in the exhaust gas. A bypass passage 3 is provided in the trap 2, and a bypass valve 4 is disposed in the bypass passage 3. Bypass valve 4
Opening and closing are performed by a diaphragm 5, and the operation of the diaphragm 5 is performed by VSVs 6 and 7.
One VSV6 is connected to the vacuum pump,
The other VSV7 connects to the atmosphere. Trap 2
A collection material 8 is charged into the container, and an electric heater 9 for igniting the particulate matter is provided upstream of the collection material 8. This electric heater 9 is body grounded. Further, the trap 2 is provided with a temperature detection sensor 10, which detects, for example, the temperature of the incoming gas. The electric circuit of the electric heater 9 is provided with a battery 11 and a relay 12 that turns on and off power to the electric heater 9. Playback is on computer 13
(ECU). When the ECU 13 determines that the regeneration time has come, the bypass valve 4 is opened by activating the VSVs 6 and 7, the relay 12 is turned on and the electric heater 9 is energized, and then the exhaust gas flows through the trap 2. Regeneration is performed by controlling the flow rate by opening and closing the bypass valve 4. The computer 13 has this control function.
コンピユータ１３は、また、電気ヒータ９への
通電に関して第２図の流れ線図に示すような制御
機能を有している。すなわち、まず積算エンジン
回転数がある一定の回転数、たとえば20万回転、
に達したかどうかを見て再生時期か否かを判断す
る。再生時期に達しない場合はそのままエンジン
回転数を積算し、再生時期に達した場合はエンジ
ン回転数NEがある回転数NE0、たとえば
1000rpm以上かどうかを見て低速回転か低速回転
でないかを判断する。低速回転でない状態がある
時間T1、たとえば20秒、以上続けば走行状態に
あつてオルタネータから提供される電力に余裕が
あるものと判断し、電気ヒータ９への通電を開始
する。低速回転でない状態であつてもそれがT1
時間以下しか続かない場合、バツテリの充電が十
分でないと判断し電気ヒータ９への通電は開始し
ない。一方、エンジン回転数NEがNE0以下で低
速回転の場合は、その低速回転状態がある時間
T2、たとえば10秒、以上続くかどうかを判断し、
T2以上続く場合は停車しているものとして、バ
ツテリのあがりを防止するために電気ヒータ９へ
の通電を停止する。また、低速回転状態がT2以
下の状態は、シフトチエンジのような場合に生じ
るが、そのようなときは瞬間的な低速状態である
から無理に電気ヒータ９への通電を切る必要がな
く、そのまま通電状態を続ける。このようにし
て、電気ヒータ９への通電が続けられて、複数本
に分割されて順に通電される電気ヒータ９の全て
に通電が終了するとパテイキユレートへの着火は
終了し、やがて再生は終了する。このような機能
を備えて前記コンピユータ１３は構成されてい
る。つぎに上記のように構成された装置における
作用について説明する。 The computer 13 also has a control function as shown in the flow diagram of FIG. 2 regarding the supply of electricity to the electric heater 9. In other words, first, the cumulative engine rotation speed is a certain constant rotation speed, for example, 200,000 rotations,
It is determined whether or not it is time to regenerate by checking whether or not it has reached this point. If the regeneration time has not been reached, the engine rotation speed is directly integrated, and if the regeneration time has been reached, the engine rotation speed NE is the rotation speed NE 0 , for example.
Check whether the rotation is over 1000rpm to determine whether it is rotating at low speed or not. If the non-low-speed rotation continues for a period of time T 1 , for example 20 seconds, it is determined that the vehicle is running and there is sufficient power provided by the alternator, and energization to the electric heater 9 is started. Even if it is not rotating at low speed, it is T 1
If it lasts for less than that time, it is determined that the battery is not sufficiently charged and the electric heater 9 does not start being energized. On the other hand, if the engine speed NE is less than NE 0 and the engine is rotating at low speed, the time period during which the low speed rotation state exists is
Determine whether T 2 lasts longer than, say 10 seconds,
If the vehicle continues for more than T2 , it is assumed that the vehicle is stopped, and power to the electric heater 9 is stopped to prevent the battery from rising. Further, a state in which the low speed rotation state is T2 or less occurs in cases such as a shift change, but in such a case, there is no need to forcibly turn off the power to the electric heater 9 because the low speed state is instantaneous. Continue to turn on the power. In this way, the electric heater 9 continues to be energized, and when all of the electric heaters 9, which are divided into a plurality of pieces and are energized in order, are completely energized, the ignition of the particulate is finished, and the regeneration is eventually finished. The computer 13 is configured with such functions. Next, the operation of the apparatus configured as described above will be explained.
第１図において、通常時はバイパスバルブ４が
閉まつていて、排気ガスはトラツプ２を流れる。
排気ガス中のパテイキユレートは捕集材８により
捕集され、浄化されて大気に排出される。エンジ
ン回転数の積算がある回転数、たとえば20万回転
を越えるとコンピユータ１３は再生時期がきたこ
とを判断し、バイパスバルブ４が開く。続いてリ
レー１２により電気ヒータ９に通電される。この
ときコンピユータ１３は電気ヒータ９の通電を第
２図の流れ線図に従つて制御する。すなわち、低
速運転がT2時間以上長時間続いているときには
電気ヒータ９への通電を中断する。このためオル
タネータからの電力供給に余裕のない低速運転時
にはバツテリ１１への負荷が軽減される。 In FIG. 1, the bypass valve 4 is normally closed and the exhaust gas flows through the trap 2.
Particulate matter in the exhaust gas is collected by the collection material 8, purified, and discharged into the atmosphere. When the cumulative number of engine revolutions exceeds a certain number of revolutions, for example 200,000 revolutions, the computer 13 determines that it is time for regeneration, and the bypass valve 4 opens. Subsequently, the electric heater 9 is energized by the relay 12 . At this time, the computer 13 controls the energization of the electric heater 9 in accordance with the flow chart shown in FIG. That is, when the low-speed operation continues for a long time T2 hours or more, the power supply to the electric heater 9 is interrupted. Therefore, the load on the battery 11 is reduced during low-speed operation when there is not enough power to be supplied from the alternator.
したがつて、本発明のデイーゼルエンジンの微
粒子浄化装置においては、トラツプ再生における
電気ヒータの通電において、単に電気ヒータに通
電してパテイキユレートに着火するという従来法
よりも一歩進め、コンピユータを設置して電気ヒ
ータへの通電を車輌の他の電源をも兼ねるバツテ
リの充電状態に合わせて制御するようにし、すな
わち低速回転状態が長く続いてバツテリに余裕が
無いときは電気ヒータへの通電を停止するように
したので、本発明によるときはトラツプの再生に
よるバツテリのあがりを防止することができ、バ
ツテリのあがりのための種々のトラブルを未然に
防止することができるという効果が得られる。 Therefore, in the diesel engine particulate purification device of the present invention, in energizing the electric heater during trap regeneration, we go one step further than the conventional method of simply energizing the electric heater to ignite the particulate, and install a computer to ignite the particulate. The power supply to the heater is controlled according to the state of charge of the battery, which also serves as the vehicle's other power source.In other words, the power supply to the electric heater is stopped when the battery runs out of power due to a long period of low speed rotation. Therefore, according to the present invention, it is possible to prevent the battery from rising due to trap regeneration, and it is possible to prevent various troubles caused by the battery from rising.
第１図は本発明の一実施例に係るデイーゼルエ
ンジンの微粒子浄化装置の系統図、第２図は第１
図の装置におけるコンピユータの制御機能を示す
流れ線図、である。
１……排気通路、２……トラツプ、３……バイ
パス通路、４……バイパスバルブ、８……捕集
材、９……電気ヒータ、１０……温度検出セン
サ、１１……バツテリ、１２……リレー、１３…
…コンピユータ。
FIG. 1 is a system diagram of a diesel engine particulate purification device according to an embodiment of the present invention, and FIG.
FIG. 3 is a flow diagram showing the control functions of the computer in the device shown in the figure. DESCRIPTION OF SYMBOLS 1... Exhaust passage, 2... Trap, 3... Bypass passage, 4... Bypass valve, 8... Collection material, 9... Electric heater, 10... Temperature detection sensor, 11... Battery, 12... ...Relay, 13...
...computer.
Claims (1)
設置して該トラツプに電気ヒータを設け、該電気
ヒータを、デイーゼルエンジンの低速運転が長時
間続いているときに電気ヒータの通電を停止させ
るコンピユータに接続したことを特徴とするデイ
ーゼルエンジンの微粒子浄化装置。1. A trap is installed in the exhaust passage of a diesel engine, an electric heater is installed in the trap, and the electric heater is connected to a computer that shuts off the electricity to the electric heater when the diesel engine continues to operate at low speed for a long time. A particulate purification device for diesel engines featuring the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204527A JPS5996416A (en) | 1982-11-24 | 1982-11-24 | Exhaust particle emission control device for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204527A JPS5996416A (en) | 1982-11-24 | 1982-11-24 | Exhaust particle emission control device for diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5996416A JPS5996416A (en) | 1984-06-02 |
| JPH0328566B2 true JPH0328566B2 (en) | 1991-04-19 |
Family
ID=16492006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57204527A Granted JPS5996416A (en) | 1982-11-24 | 1982-11-24 | Exhaust particle emission control device for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5996416A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0487317U (en) * | 1990-11-30 | 1992-07-29 | ||
| US5325038A (en) * | 1991-06-10 | 1994-06-28 | Nippondenso Co., Ltd. | Driving apparatus for controlling an electric load in a vehicle |
| DE10301035A1 (en) * | 2003-01-13 | 2004-07-22 | Hjs Fahrzeugtechnik Gmbh & Co. | Method for regulating the control of a heating device for regenerating a particle filter that is switched on in the exhaust line of an internal combustion engine |
-
1982
- 1982-11-24 JP JP57204527A patent/JPS5996416A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5996416A (en) | 1984-06-02 |
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