JPH02215928A - Method of controlling engine with supercharger - Google Patents
Method of controlling engine with superchargerInfo
- Publication number
- JPH02215928A JPH02215928A JP3264589A JP3264589A JPH02215928A JP H02215928 A JPH02215928 A JP H02215928A JP 3264589 A JP3264589 A JP 3264589A JP 3264589 A JP3264589 A JP 3264589A JP H02215928 A JPH02215928 A JP H02215928A
- Authority
- JP
- Japan
- Prior art keywords
- bypass valve
- main
- engine
- discharge port
- sub
- 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
- 238000000034 method Methods 0.000 title claims description 7
- 239000000446 fuel Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000010792 warming Methods 0.000 abstract 3
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Supercharger (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、スーパチャージャ付ディーゼルエンジンの制
御方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of controlling a supercharged diesel engine.
（従来の技術）
ディーゼルエンジンのスーパチャージャは、エンジンの
吸気マニホルドに接続される主吐出口と副吐出口とを有
し、エンジンのクランク軸から駆動されるが、このスー
パチャージャは。(Prior Art) A diesel engine supercharger has a main discharge port and a sub-discharge port connected to the intake manifold of the engine, and is driven from the engine crankshaft.
その吸込口を主吐出口にバイパスする主バイパスバルブ
と、副吐出口を主吐出口と吸込口とに連通ずる副バイパ
スバルブとを備えている。The main bypass valve bypasses the suction port to the main discharge port, and the sub-bypass valve communicates the sub-discharge port with the main discharge port and the suction port.
（発明が解決しようとする！！［）
このようなスーパチャージャ付エンジンは、所定の制御
マツプに従って、エンジンの回転数とアクセル開度（ま
たは燃料噴射ポンプのラック位置）即ち燃料噴射量に応
じてバイパスバルブの開閉を制御して給気バイパス制御
しているが、一方エンジンの暖気運転を促進することが
要求される始動時及びスーパチャージャの吐出温度が上
昇し過大な熱膨張を起すのを抑制することが要求される
オーバラン時に充分な給気バイパス制御をすることがで
きなかった。(This is what the invention attempts to solve!! [) Such an engine with a supercharger operates according to the engine speed and accelerator opening (or the rack position of the fuel injection pump), that is, the fuel injection amount, according to a predetermined control map. Air supply bypass is controlled by controlling the opening and closing of the bypass valve, but at the same time, it is necessary to promote warm-up of the engine during startup, and to prevent excessive thermal expansion caused by a rise in the discharge temperature of the supercharger. It was not possible to perform sufficient supply air bypass control during overrun, which is required.
本発明の目的は、上記の欠点を回避し、エンジンの始動
時及びオーバラン時に最適な給気バイパス制御して暖気
運転の促進と過大な熱膨張とを抑制することができるよ
うにしたスーパチャージャ付エンジンの制御方法を提供
することにある。An object of the present invention is to avoid the above-mentioned drawbacks, and provide a supercharger equipped with a supercharger capable of promoting warm-up operation and suppressing excessive thermal expansion through optimal air supply bypass control during engine startup and overrun. The object of the present invention is to provide a method for controlling an engine.
（課題を解決するための手段）
本発明は、上記の課題を解決するために、エアクリーナ
に接続される吸込口とエンジンの吸気マニホルドに接続
される主吐出口と１吐出口とを有するスーパチャージャ
を備え、このスーパチャージャの吸込口を主吐出口にバ
イパスする主バイパスバルブと１吐出口を主吐出口と吸
込口とに連通ずる副バイパスバルブとを有していてエン
ジンの回転数と燃料噴射ポンプのラック位置とに応じて
主バイパスバルブと副バイパスバルブとの開閉を制御す
るスーパチャージャ付エンジンにおいて、エンジンの始
動時に主バイパスバルブと副バイパスバルブとの両方を
閉じ、またエンジンのオーバラン時に主バイパスバルブ
と副バイパスバルブの両方を開くように制御することを
特徴とするスーパチャージャ付エンジンの制御方法を提
供するものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a supercharger having an inlet connected to an air cleaner, a main discharge port connected to an intake manifold of an engine, and one discharge port. It has a main bypass valve that bypasses the suction port of this supercharger to the main discharge port, and a sub-bypass valve that communicates one discharge port with the main discharge port and the suction port, and has a main bypass valve that bypasses the suction port of the supercharger to the main discharge port, and a sub-bypass valve that communicates one discharge port with the main discharge port and the suction port. In a supercharged engine that controls the opening and closing of the main bypass valve and auxiliary bypass valve depending on the pump rack position, both the main bypass valve and the auxiliary bypass valve are closed when the engine starts, and the main bypass valve is closed when the engine overruns. The present invention provides a method for controlling an engine with a supercharger, which is characterized by controlling to open both a bypass valve and a sub-bypass valve.
（作用）
このようにスーパチャージャ付エンジンの給気バイパス
を制御すると、エンジンの始動時には最大限の過給動作
が行われるためエンジンの暖気運転が促進され、またエ
ンジンのオーバラン時にはスーパチャージャの主吐出口
からの吐出圧が低下するため吐出温度が低下し過大な熱
膨張が適正に抑制される。(Function) When the air supply bypass of a supercharged engine is controlled in this way, the maximum supercharging operation is performed when the engine starts, promoting warm-up of the engine, and when the engine overruns, the main discharge of the supercharger is Since the discharge pressure from the outlet decreases, the discharge temperature decreases, and excessive thermal expansion is appropriately suppressed.
（実施例）
本発明の実施例を図面を参照して詳細にのべると、第１
図は本発明の制御方法が適用されるスーパチャージャ付
ディーゼルエンジンｌＯを示し、このディーゼルエンジ
ン１０は１図示しないエアクリーナに接続される吸込口
１４とエンジンｌＯの吸気マニホルド１２に接続される
主吐出口１６と１吐出口１８とを有するスーパチャージ
ャ２０を有する。このスーパチャージャ２０は、その吸
込口１４を主吐出口１６にバイパスする主バイパスバル
ブ２２と１吐出口１８を主吐出口１６と吸込口１４とに
連通する副バイパスバルブ２４とを備えている。これら
のバイパスバルブ２２．２４はそれぞれアクチュエータ
２６．２８によって駆動される。(Example) The example of the present invention will be described in detail with reference to the drawings.
The figure shows a diesel engine lO with a supercharger to which the control method of the present invention is applied, and this diesel engine 10 has one suction port 14 connected to an air cleaner (not shown) and a main discharge port connected to an intake manifold 12 of the engine lO. 16 and one discharge port 18. The supercharger 20 includes a main bypass valve 22 that bypasses the suction port 14 to the main discharge port 16, and a sub-bypass valve 24 that communicates one discharge port 18 with the main discharge port 16 and the suction port 14. These bypass valves 22.24 are each actuated by an actuator 26.28.
このスーパチャージャ２０は、第２図に示す制御マツプ
に従って、エンジンの回転数と燃料噴射ポンプのラック
位置またはアクセル開度に応じて主バイパスバルブ２２
と副バイパスバルブ２４との開閉を制御するようになっ
ている。This supercharger 20 controls the main bypass valve 22 according to the control map shown in FIG.
and the auxiliary bypass valve 24 are controlled to open and close.
この制御は、エンジンの回転数を指示する回転数信号Ｒ
１燃料噴射ポンプのラック位置またはアクセル開度を指
示するアクセル信号Ａ、ブースト圧力を指示するブース
ト圧信号Ｂ、主吐出口１６からの圧縮空気の温度を指示
する温度信号ＴＡ及びエンジン冷却水温度信号ＴＣ等を
受は入れてバイパスバルブ２２．２４の開閉を制御する
制御信号を出力するＣＰＵの如きコントロールユニット
３０によって行われる。This control uses a rotational speed signal R that indicates the engine rotational speed.
1. Accelerator signal A that indicates the rack position or accelerator opening of the fuel injection pump, boost pressure signal B that indicates the boost pressure, temperature signal TA that indicates the temperature of compressed air from the main discharge port 16, and engine cooling water temperature signal. This is performed by a control unit 30 such as a CPU which receives the TC and the like and outputs control signals for controlling the opening and closing of the bypass valves 22 and 24.
本発明の方法は、第２図の制御マツプに斜線ｒＡＪで示
すように、エンジンの始動時には主バイパスバルブ２２
と副バイパスバルブ２４との両方を閉じ、また第２図の
制御マツプの斜線ｒＢＪで示すように、エンジンのオー
バラン時には主バイパスバルブ２２と副バイパスバルブ
２４の両方を開くように制御する。In the method of the present invention, as shown by the diagonal line rAJ in the control map of FIG.
The main bypass valve 22 and the auxiliary bypass valve 24 are both closed, and as shown by the diagonal line rBJ in the control map of FIG. 2, both the main bypass valve 22 and the auxiliary bypass valve 24 are opened during engine overrun.
このように、エンジンの始動時には主バイパスバルブ２
２と副バイパスバルブ２４との両方を閉じるので最大限
の過給動作とそれによる圧縮温度の上昇とによって暖気
運転が促進され、またエンジンのオーバラン時には主バ
イパスバルブ２２と副バイパスバルブ２４との両方が開
くので主吐出口からの空気の吐出圧と吐出温度とが低下
して過大な熱膨張が抑制される。In this way, when starting the engine, the main bypass valve 2
Since both the main bypass valve 22 and the auxiliary bypass valve 24 are closed, warm-up operation is promoted by the maximum supercharging operation and the resulting rise in compression temperature, and when the engine is overrun, both the main bypass valve 22 and the auxiliary bypass valve 24 is opened, the discharge pressure and discharge temperature of air from the main discharge port are reduced, and excessive thermal expansion is suppressed.
（発明の効果）
本発明によれば、上記のように、エンジンの始動時及び
オーバラン時に最適な給気バイパス制御して暖気運転の
促進と過大な熱膨張とを有効に抑制することができる実
益がある。(Effects of the Invention) According to the present invention, as described above, it is possible to achieve the practical benefit of promoting warm-up operation and effectively suppressing excessive thermal expansion through optimal air intake bypass control at engine startup and overrun. There is.
第１図は本発明に係る概略系統図、第２図は本発明に用
いられるスーパチャージャのバイパス制御マツプを示す
図である。
１０−−−−−ディーゼルエンジン、１２−−一一吸気
マニホルド、１４−−−−−吸込口。
１６−−−−−主吐出口、１８−−−−ｍ−吐出０．２
０−−−−−スーパチャージャ、２２−一一一一生バイ
パスバルブ、２４−−−ｍ−バイパスバルブ、３０−−
−−−コントロールユニット。FIG. 1 is a schematic system diagram according to the present invention, and FIG. 2 is a diagram showing a bypass control map of a supercharger used in the present invention. 10---Diesel engine, 12---11 intake manifold, 14---Suction port. 16-----Main discharge port, 18----m-Discharge 0.2
0---Supercharger, 22-111 bypass valve, 24---m-bypass valve, 30--
---Control unit.
Claims (1)
ホルドに接続される主吐出口と副吐出口とを有するスー
パチャージャを備え、前記スーパチャージャの前記吸込
口を前記主吐出口にバイパスする主バイパスバルブと前
記副吐出口を前記主吐出口と前記吸込口とに連通する副
バイパスバルブとを有していて前記エンジンの回転数と
燃料噴射量とに応じて前記主バイパスバルブと副バイパ
スバルブとの開閉を制御するスーパチャージャ付エンジ
ンにおいて、前記エンジンの始動時に前記主バイパスバ
ルブと副バイパスバルブとの両方を閉じ、また前記エン
ジンのオーバラン時に前記主バイパスバルブと副バイパ
スバルブの両方を開くように制御することを特徴とする
スーパチャージャ付エンジンの制御方法。a supercharger having a suction port connected to an air cleaner, and a main discharge port and a sub-discharge port connected to an intake manifold of an engine; a main bypass valve that bypasses the suction port of the supercharger to the main discharge port; It has a sub-bypass valve that communicates the sub-discharge port with the main discharge port and the suction port, and opens and closes the main bypass valve and the sub-bypass valve according to the rotational speed of the engine and the amount of fuel injection. In a supercharged engine that controls, both the main bypass valve and the auxiliary bypass valve are closed when the engine starts, and both the main bypass valve and the auxiliary bypass valve are controlled to be opened when the engine overruns. A method for controlling an engine with a supercharger, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3264589A JPH02215928A (en) | 1989-02-14 | 1989-02-14 | Method of controlling engine with supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3264589A JPH02215928A (en) | 1989-02-14 | 1989-02-14 | Method of controlling engine with supercharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02215928A true JPH02215928A (en) | 1990-08-28 |
Family
ID=12364589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3264589A Pending JPH02215928A (en) | 1989-02-14 | 1989-02-14 | Method of controlling engine with supercharger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02215928A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223417A (en) * | 1986-03-25 | 1987-10-01 | Toyota Motor Corp | Supercharging control device for diesel engine |
| JPS63285219A (en) * | 1987-05-14 | 1988-11-22 | Kobe Steel Ltd | Screw type mechanical supercharger |
-
1989
- 1989-02-14 JP JP3264589A patent/JPH02215928A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62223417A (en) * | 1986-03-25 | 1987-10-01 | Toyota Motor Corp | Supercharging control device for diesel engine |
| JPS63285219A (en) * | 1987-05-14 | 1988-11-22 | Kobe Steel Ltd | Screw type mechanical supercharger |
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