JPS61197752A - Intake air heating device of diesel engine - Google Patents
Intake air heating device of diesel engineInfo
- Publication number
- JPS61197752A JPS61197752A JP60036755A JP3675585A JPS61197752A JP S61197752 A JPS61197752 A JP S61197752A JP 60036755 A JP60036755 A JP 60036755A JP 3675585 A JP3675585 A JP 3675585A JP S61197752 A JPS61197752 A JP S61197752A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- air heater
- intake air
- temperature
- air
- 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.)
- Pending
Links
Classifications
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/13—Combustion air
-
- 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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、直接噴射式ディーゼルエンジンにおいて吸気
（吸入エア）を吸気通路内で加熱するようにした吸気加
熱装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in an intake air heating device for heating intake air (intake air) in an intake passage in a direct injection diesel engine.
（従来の技術）
従来、この種のディーゼルエンジンの吸気加熱装置とし
て、例えば実開昭５６−９０４５７号公報に開示される
ように、ディーゼルエンジンの吸気通路にエアヒータを
配置し、該エアヒータをエンジンの始動時に作動させる
ことにより、エンジン始動時の吸入エアを加熱昇温させ
て燃料の着火性を高め、その失火を防止するようにした
ものは知られている。(Prior Art) Conventionally, as an intake air heating device for this type of diesel engine, an air heater is arranged in the intake passage of the diesel engine, as disclosed in, for example, Japanese Utility Model Application Publication No. 56-90457, and the air heater is connected to the engine. There is a known device that is activated at the time of starting the engine to heat and raise the temperature of the intake air at the time of starting the engine, thereby increasing the ignitability of the fuel and preventing the misfire.
（発明が解決しようとする問題点）
ところで、ディーゼルエンジンの温度が比較的低い冷間
時にエンジンが加速状態に移行したときには、燃焼室の
壁温度の上昇率が燃焼室に噴射供給された燃料の増加率
に対し相対的に遅れるので、燃焼室壁による吸入エアの
加熱昇温が不十分となって噴射燃料の気化・霧化が良好
に行われず、その結果、燃料の着火遅れによってノッキ
ングが発生するという問題がある。(Problem to be Solved by the Invention) By the way, when the diesel engine shifts to an acceleration state when the temperature of the diesel engine is relatively low, the rate of increase in the wall temperature of the combustion chamber is equal to that of the fuel injected into the combustion chamber. As the increase rate is relatively delayed, the heating temperature of the intake air by the combustion chamber wall is insufficient, and the injected fuel is not properly vaporized and atomized, resulting in knocking due to the delayed ignition of the fuel. There is a problem with doing so.
そこで、上記従来の技術を利用して、エンジン温度が低
い条件下でエンジンが加速状態になると、上記した吸気
通路のエアヒータを作動させて吸入 ゛エアを加熱する
ことにより、その昇温した吸入エアのもとて加速時に増
量された噴射燃料の気化・霧化を促進してその着火遅れ
を防止するようにすることが考えられる。Therefore, using the above conventional technology, when the engine accelerates under conditions where the engine temperature is low, the air heater in the intake passage is activated to heat the intake air, and the heated intake air is heated. It is conceivable to promote the vaporization and atomization of the injected fuel, which is increased during acceleration, to prevent the ignition delay.
ところが、その場合、エンジンのアクセル開度の全開時
に上記の如く吸入エアを加熱したときには、吸入エアの
充填効率の大幅な低下を招き、燃 □料噴射量に対する
吸入エアｍが不足してスモークが増大するという問題が
生じる。However, in that case, if the intake air is heated as described above when the engine accelerator is fully opened, the filling efficiency of the intake air will be significantly reduced, and the intake air m will be insufficient for the fuel injection amount, resulting in smoke. The problem arises that it increases.
本発明は斯かる諸点に鑑みてなされたもので、 ・その
目的とするところは、エンジンの加速時辷そ′の吸気通
路に配置されたエアヒータを作動させる条件を、エンジ
ンの温度のみならずそのアクセル開度に関連させて設定
することにより、アクセル全開時のスモーク増大を防止
しつつ、エンジン加速時の燃焼室壁温の上昇遅れによる
燃料の着火遅れを防いでノッキングを低減させることに
ある。The present invention has been made in view of the above points, and its purpose is to set the conditions for operating the air heater disposed in the intake passage when the engine is accelerating not only at the engine temperature but also at that temperature. By setting it in relation to the accelerator opening degree, the purpose is to prevent an increase in smoke when the accelerator is fully opened, and to prevent a delay in fuel ignition due to a delay in the rise of the combustion chamber wall temperature during engine acceleration, thereby reducing knocking.
（問題点を解決するための手段）
上記の目的の達成のため、本発明の解決手段は、吸気通
路に吸入エアを加熱するためのエアヒータを備えたディ
ーゼルエンジンにおいて、エンジンの温度を検出するエ
ンジン温度検出手段と、エン□ジンの加速状態を検出す
る加速状態検出手段と、エンジンのアクセル開度を検出
するナクセル開度検出手段とを設ける。さらに、上記各
検出手段の出力を受け、エンジン温度が設定温度以下で
かつアクセル温度が全開状態以外のエンジンの加速時に
上記エアヒータを作動させるように制御するエアヒータ
制御手段を設けた構成とする。(Means for solving the problem) In order to achieve the above object, the solving means of the present invention provides an engine that detects the temperature of the engine in a diesel engine equipped with an air heater for heating intake air in the intake passage. A temperature detection means, an acceleration state detection means for detecting the acceleration state of the engine, and a naxel opening detection means for detecting the accelerator opening of the engine are provided. Furthermore, the air heater control means receives the outputs of the respective detection means and controls the air heater to operate when the engine accelerates when the engine temperature is below the set temperature and the accelerator temperature is not in a fully open state.
（作用）
上記の構成により□、本発明では、エン榛ン温度が設定
温度以下にあり、か台アクセル開度が全開未満にあるエ
ンジンの加速時に、エアヒータが作動してエンジンへの
吸入エアが加熱されるので、上記条件下でのエンジンの
加速時に燃料噴射量の増量変化に対する燃焼室壁温度の
上昇変化に相対的な遅れが生じても、上記加熱昇温した
吸入エアにより噴射燃料の気化・霧化を十分に促進させ
ることができ、その着火遅れを防止できることになる。(Function) With the above configuration, in the present invention, when the engine temperature is below the set temperature and the accelerator opening is less than fully open, the air heater operates and the intake air is drawn into the engine. Since the injected fuel is heated, even if there is a relative delay in the increase in combustion chamber wall temperature in response to an increase in the fuel injection amount when the engine accelerates under the above conditions, the injected fuel is vaporized by the heated intake air.・Atomization can be sufficiently promoted and ignition delay can be prevented.
、・□また、上記エンジ
ン温度の低い加速時であっても、エンジンのアクセル開
度が全一状態のときは、エアヒータの作動が行われない
ので、アクセル開度の全開時の吸入エアの充填量を増加
させてスモークの増大を防止することができる。,・□Also, even during acceleration when the engine temperature is low, the air heater will not operate when the engine accelerator is fully open, so the intake air will not be filled when the accelerator is fully open. Increase in smoke can be prevented by increasing the amount.
（実施例） 以下、本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described below based on the drawings.
第１図は本発明の実施例に係るディーゼルエンジンの吸
気加熱装置の全体構成を永し、１は、シリンダブロック
２内のシリンダ３、シリンダヘッド４およびピストン５
により形成された燃焼室６を有する直接噴射式ディーゼ
ルエンジン、７は該エンジン１の燃焼室６内に吸気つま
りエアを供給するための吸気通路であって、該吸気通路
７の途中には燃焼室６内に吸入されるエアを加熱するた
めの電気式エアヒータ８が配設されている。FIG. 1 shows the overall configuration of an intake air heating device for a diesel engine according to an embodiment of the present invention, in which 1 indicates a cylinder 3 in a cylinder block 2, a cylinder head 4, and a piston 5.
7 is an intake passage for supplying intake air, that is, air, into the combustion chamber 6 of the engine 1, and there is a combustion chamber in the middle of the intake passage 7. An electric air heater 8 is provided to heat the air drawn into the air heater 6 .
一方、９は上記エンジン１の燃焼室６に燃料を噴射供給
するための燃料噴射ノズルであって、該ノズル９は燃料
噴射管１０を介して、エンジン１により駆動される朝型
の燃料噴射ポンプ１１に接 。On the other hand, 9 is a fuel injection nozzle for injecting and supplying fuel to the combustion chamber 6 of the engine 1, and the nozzle 9 is connected to a morning-type fuel injection pump driven by the engine 1 via a fuel injection pipe 10. Close to 11.
続されている。上記燃料噴射ポンプ１１はアクセルペダ
ル（図示せず）に連結されたコントロールレバー１１ａ
を備え、該コントロールレバー１１ａは図示しないがガ
バナ機構を介して、ニレジン １の燃焼室６へ
の燃料噴ａ４Ｆｎを制御するコントロールラックに連結
されており、燃料噴射ポンプ１１において、そのコント
ロールレバー１１ａの操作力とガバナ機構でのフライウ
ェイト遠心力との釣合いにより制御されるコントロール
ラックのラック位置に基づいて燃料噴（）１ｍを調整し
ながら燃料を加圧し、その加圧された高圧の燃料を燃料
噴射ノズル９に圧送して燃焼室６内に噴射させるように
なされている。It is continued. The fuel injection pump 11 is a control lever 11a connected to an accelerator pedal (not shown).
The control lever 11a is connected via a governor mechanism (not shown) to a control rack that controls the fuel injection a4Fn into the combustion chamber 6 of the resin 1. The fuel is pressurized while adjusting the fuel injection (1m) based on the rack position of the control rack, which is controlled by the balance between the operating force and the flyweight centrifugal force in the governor mechanism, and the pressurized high-pressure fuel is used as fuel. It is configured to force-feed it to an injection nozzle 9 and inject it into the combustion chamber 6.
さらに、１２は上記エアヒータ８にバッテリ１３より給
電するヒータ作動回路に介設されエアと−タ８の作動を
制御するためのエアヒ］り制御手段であって、該エアヒ
ータ制御手段１２には、上記燃料噴射ポンプ１１におけ
るコントロールラッりのラック位置に基づいてアクセル
開度を検出するアクセル開度検出手段としてのラックセ
ンサ１４と、燃料噴射ポンプ１１のコントロールレバー
１１ａの開度変化率に基づいてエンジン１の加速状態を
検出する加速状態検出手段としてのコントロールレバー
センサ１５と、エンジン１近傍に位置する燃料噴射ポン
プ１１自体の温度に基づいてエンジン温度を検出するエ
ンジン温度センサ１６との各出力信号が入力されている
。そして、上記エアヒータ制御手段１２は、第２図に示
すように、上記ラックセンサ１４の出力信号を受け、燃
料噴射ポンプ１１のコントロールラックのラック位置が
アクセル全開状態に対応する位置にないときにＯＮ動作
する第１スイッチ部材１２ａと、コントロールレバーセ
ンサ１５の出力信号を受け、燃料噴射ポンプ１１のコン
トロールレバー１１ａの開度変化率がエンジン１の加速
状態を示す所定値以上にあるとぎにＯＮ動作する第２ス
イッチ部材１２ｂと、上記エンジン温度センサ１６の出
力信号を受け、エンジン温度が設定値以下のときにＯＮ
動作する第３スイッチ部材１２Ｃとを直列に接続してな
り、このエアヒータ制御手段１２ににす、エンジン温度
が設定温度以下でかつアクセル開度が全開未満のエンジ
ン１の加速時にエアヒータ８を通電により作動させるよ
うに構成されている。Further, reference numeral 12 denotes an air heater control means for controlling the operation of the air heater 8, which is interposed in the heater operating circuit that supplies power to the air heater 8 from the battery 13. A rack sensor 14 serves as an accelerator opening detection means for detecting the accelerator opening based on the rack position of the control lever in the fuel injection pump 11, and a rack sensor 14 serves as an accelerator opening detection means for detecting the accelerator opening based on the rack position of the control lever in the fuel injection pump 11. Output signals from a control lever sensor 15 as an acceleration state detection means for detecting the acceleration state of the engine 1 and an engine temperature sensor 16 for detecting the engine temperature based on the temperature of the fuel injection pump 11 itself located near the engine 1 are input. has been done. As shown in FIG. 2, the air heater control means 12 receives the output signal of the rack sensor 14 and turns ON when the rack position of the control rack of the fuel injection pump 11 is not at a position corresponding to the fully open accelerator state. When the operating first switch member 12a and the output signal of the control lever sensor 15 are received, the opening change rate of the control lever 11a of the fuel injection pump 11 is equal to or higher than a predetermined value indicating the acceleration state of the engine 1, and the switch is turned on. The second switch member 12b receives the output signal of the engine temperature sensor 16 and turns ON when the engine temperature is below the set value.
The air heater control means 12 is connected in series with the operating third switch member 12C, and the air heater 8 is energized when the engine 1 is accelerated when the engine temperature is below the set temperature and the accelerator opening is less than fully open. configured to operate.
尚、第１図中、１７は吸気通路７に設番プたエアクリー
ナである。In FIG. 1, 17 is an air cleaner installed in the intake passage 7.
したがって、上記実施例においては、エンジン温度が設
定温度以下にある冷間時であって、アクセル開度が全開
状態にないエンジン１の加速時、エアヒータ制御手段１
２におけ、る各スイッチ部材１２ａ 〜１２ｃのＯＮＤ
作によりバッテリ１３からエアヒータ８に給電されて該
エアヒータ８が作動し、このヒータ８の作動により、吸
気通路７を通ってエンジン１の燃焼室６に吸入されるエ
アが加熱されて昇温する。そのため、エンジン１の冷間
加速時に、燃焼室６に噴射供給される燃料の増量変化に
対して燃焼室６の！！２温度の上昇変化が相対的に遅れ
ても、それを補償するように、上記エアヒータ８の加熱
を受けて昇温した吸入エアにより上記地滑燃料の気化・
霧化が促進されてその着火遅れが抑制され、よってノッ
キングを低減させることができる。Therefore, in the above embodiment, when the engine 1 is accelerating in a cold state when the engine temperature is below the set temperature and the accelerator opening is not in a fully open state, the air heater control means 1
2, OND of each switch member 12a to 12c
As a result of the operation, power is supplied from the battery 13 to the air heater 8, and the air heater 8 is operated, and as a result of the operation of the heater 8, the air sucked into the combustion chamber 6 of the engine 1 through the intake passage 7 is heated and its temperature is increased. Therefore, during cold acceleration of the engine 1, the change in the amount of fuel injected into the combustion chamber 6 increases. ! 2. Even if the increase in temperature is relatively delayed, in order to compensate for this, the landslide fuel is vaporized and heated by the intake air heated by the air heater 8 and raised in temperature.
Atomization is promoted and ignition delay is suppressed, thereby reducing knocking.
また、このようなエンジン１の加速時であっても、アク
セル開度が全開状態になると、エアヒータ制御手段１２
における第１スイッチ部材１２ａがＯＦＦ動作してエア
ヒータ８の作動が停止され、エアヒータ８による吸入エ
アの加熱が行われなくなる。そのため、吸入エアの充填
効率を大に保って加速時の燃料噴射量に対する吸入エア
量を増大させることができ、よってスモークの増大を防
止することができる。Further, even when the engine 1 is accelerating, if the accelerator opening is fully open, the air heater control means 12
The first switch member 12a is turned OFF, the operation of the air heater 8 is stopped, and the air heater 8 no longer heats the intake air. Therefore, it is possible to maintain a high intake air filling efficiency and increase the intake air amount relative to the fuel injection amount during acceleration, thereby preventing an increase in smoke.
（発明の効果）
以上の如り、本発明によれば、ディーゼルエンジンの吸
気通路に配設されたエアヒータを、エンジン温度が低く
かつアクセル開度が全開状態以外のエンジンの加速時に
作動させてエンジンへの吸入エアを加熱するようにした
ものであるので、アクセル全開時のスモーク増大を防止
しつつ、エンジンの加速時における燃料噴射量の増量変
化に対する燃焼室壁温の上昇遅れに起因する燃料の着火
遅れを防止して、ノッキングを有効に低減することがで
きるものである。(Effects of the Invention) As described above, according to the present invention, the air heater disposed in the intake passage of a diesel engine is activated when the engine accelerates when the engine temperature is low and the accelerator opening is not fully open. This heats the intake air to the combustion chamber, which prevents an increase in smoke when the accelerator is fully opened, while also reducing the amount of fuel that is caused by the delay in the rise of the combustion chamber wall temperature in response to changes in the fuel injection amount during engine acceleration. It is possible to prevent ignition delay and effectively reduce knocking.
図面は本発明の実施例を示し、第１図は吸気加熱装置の
全体概略構成図、第２図はエアヒータ制御手段の詳細説
明図である。
１・・・ディーゼルエンジン、７用吸気通路、８・・・
エアヒータ、１１・・・燃料噴射ポンプ、１２・・・エ
アヒータ制御手段、１４・・・ラックセンサ、１５・・
・コント０−ルレバ〜セン勺、１６・・・エンジン温度
センサ。
参へ−−１
特 許 出 願 人 マツダ株式会社１．、 ｌ：
代 理 人 前 １）
弘 １．゛ 崖１゜＋′、、、、、ｉニー１The drawings show an embodiment of the present invention, and FIG. 1 is a general schematic diagram of the intake air heating device, and FIG. 2 is a detailed explanatory diagram of the air heater control means. 1...Diesel engine, intake passage for 7, 8...
Air heater, 11...Fuel injection pump, 12...Air heater control means, 14...Rack sensor, 15...
・Control 0-Relever-sensing, 16...Engine temperature sensor. Go to --1 Patent applicant Mazda Motor Corporation 1. , l:
In front of the agent 1)
Hiroshi 1.゛ Cliff 1゜+',,,,i knee 1
Claims (1)
えたディーゼルエンジンにおいて、エンジンの温度を検
出するエンジン温度検出手段と、エンジンの加速状態を
検出する加速状態検出手段と、アクセル開度を検出する
アクセル開度検出手段と、上記各検出手段の出力を受け
、エンジン温度が設定温度以下でかつアクセル開度が全
開未満のエンジンの加速時に上記エアヒータを作動させ
るエアヒータ制御手段とを設けたことを特徴とするディ
ーゼルエンジンの吸気加熱装置。(1) In a diesel engine equipped with an air heater for heating intake air in the intake passage, an engine temperature detection means for detecting the temperature of the engine, an acceleration state detection means for detecting the acceleration state of the engine, and an accelerator opening degree are detected. The present invention is characterized by comprising: an accelerator opening detection means; and an air heater control means that receives the outputs of the respective detection means and operates the air heater when the engine accelerates when the engine temperature is below a set temperature and the accelerator opening is less than full open. Intake air heating device for diesel engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60036755A JPS61197752A (en) | 1985-02-26 | 1985-02-26 | Intake air heating device of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60036755A JPS61197752A (en) | 1985-02-26 | 1985-02-26 | Intake air heating device of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61197752A true JPS61197752A (en) | 1986-09-02 |
Family
ID=12478556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60036755A Pending JPS61197752A (en) | 1985-02-26 | 1985-02-26 | Intake air heating device of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61197752A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0381858A2 (en) * | 1989-02-03 | 1990-08-16 | Hella KG Hueck & Co. | Device for controlling the intake mixture temperature of an internal-combustion engine, particularly in motor vehicles |
| CN112081675A (en) * | 2020-07-31 | 2020-12-15 | 广西玉柴机器股份有限公司 | Anti-surge function control strategy for internal combustion engine controller |
-
1985
- 1985-02-26 JP JP60036755A patent/JPS61197752A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0381858A2 (en) * | 1989-02-03 | 1990-08-16 | Hella KG Hueck & Co. | Device for controlling the intake mixture temperature of an internal-combustion engine, particularly in motor vehicles |
| CN112081675A (en) * | 2020-07-31 | 2020-12-15 | 广西玉柴机器股份有限公司 | Anti-surge function control strategy for internal combustion engine controller |
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