JPS5857043A - Cylinder quantity control device of diesel engine - Google Patents

Cylinder quantity control device of diesel engine

Info

Publication number
JPS5857043A
JPS5857043A JP15556981A JP15556981A JPS5857043A JP S5857043 A JPS5857043 A JP S5857043A JP 15556981 A JP15556981 A JP 15556981A JP 15556981 A JP15556981 A JP 15556981A JP S5857043 A JPS5857043 A JP S5857043A
Authority
JP
Japan
Prior art keywords
fuel
cylinders
valve
diesel engine
intake
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.)
Granted
Application number
JP15556981A
Other languages
Japanese (ja)
Other versions
JPH0154534B2 (en
Inventor
Hiroshi Shimomukai
下向 博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to JP15556981A priority Critical patent/JPS5857043A/en
Publication of JPS5857043A publication Critical patent/JPS5857043A/en
Publication of JPH0154534B2 publication Critical patent/JPH0154534B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D17/00Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/02Cutting-out
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00Engines characterised by air compression and subsequent fuel addition
    • F02B3/06Engines characterised by air compression and subsequent fuel addition with compression ignition

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE:To reduce pumping loss of an engine and decrease unburned HC, by building a fuel spill regulator valve in an injection pump, providing an intake shut off valve and injection nozzle in a cylinder at an idle side and placing said shut off valve and injection nozzle in an imoperative condition at a load of the engine in a preset value or less. CONSTITUTION:A depressing amount of an accelerator pedal 11 is small from an idle condition to a 1/2 load condition, and control levers 12, 13 are rotated between positions B, C, then a link 24 is not moved. In consequence, a built-in fuel spill regulator valve 6, connected to a lever 18, is in a full open state, and supplied fuel to the second and third cylinders all flows in a return passage 23, then fuel is not supplied to an injection nozzle 5 of said cylinders. Then the depressing amount of the pedal 11 is increased, if the lever 13 exceeds the position C, the lever 18 is turned through the link 24, and fuel is also supplied to said injection nozzle 5 through the regulator valve 6. Further a switch 7 is turned ON, and an intake shut off valve 3 can be fully opened by a solenoid 9 to perform full cylinder operation.

Description

【発明の詳細な説明】 本発明はディーゼルエンジンの気筒数制御装置に関し、
更に詳しくは、多気筒ディーゼルエンジンの負荷が小さ
い時に、その一部気筒の活動を停止させてエンジンの摩
擦損失を減少させることにより、燃費を向上させ、未燃
HCを低減させたディーゼルエンジンの気筒数制御装置
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cylinder number control device for a diesel engine,
More specifically, when the load of a multi-cylinder diesel engine is light, some of the cylinders are inactive to reduce engine friction loss, thereby improving fuel efficiency and reducing unburned HC. This relates to a numerical control device.

元来、ディーゼルエンジンには吸入空気量の絞りがない
だめに、無負荷運転から全負荷運転まで大量の空気を吸
入して圧縮、排気の仕事をしている。このだめの仕事量
は膨大なものであり、ディーゼルエンジンの全摩擦損失
の半分近くはこの圧縮、排気行程で生じるもの待ある。
Originally, diesel engines do not have a throttle for intake air volume, so they take in a large amount of air, compress it, and exhaust it from no-load to full-load operation. The amount of work done by this tank is enormous, and nearly half of the total friction loss in a diesel engine occurs during the compression and exhaust strokes.

特に、ディーセルエンジンが低負荷で運転されている時
には、エンジンの正味仕事量に対する摩擦損失の比率は
大きくなっている。
In particular, when a diesel engine is operated at low load, the ratio of friction loss to the net work of the engine is large.

そこで従来、ディーゼルエンジンが低負荷で運転される
時に、その圧縮、排気行程で生じる摩擦損失、いわゆる
ボンピング損失を低減させるために、吸入空気量を絞ろ
うという試みがある。
Conventionally, when a diesel engine is operated at low load, attempts have been made to reduce the amount of intake air in order to reduce the friction loss, so-called bombing loss, that occurs during the compression and exhaust strokes of the diesel engine.

しかしながら、従来のディーゼルエンジンの方式では、
単に吸入空気量を絞ったりしてボンピング損失を大幅に
減少させると、IICが増大したり、始動性が損われた
り、青白煙が増大する等の不具合を生じるために前記該
みは未だに実用化されていない。
However, in the conventional diesel engine system,
If the pumping loss is significantly reduced by simply restricting the amount of intake air, problems such as an increase in IIC, poor starting performance, and an increase in blue-white smoke will occur, so these problems are still not in practical use. It has not been.

また、通常の直列型ディーゼルエンジンでは燃料噴射ポ
ンプは1個しかなく、各気筒への燃料噴射量は同一であ
り、エンジン運転中に気筒毎にそれぞれの気筒への熱料
噴射量を変更することはできなかった。
Also, in a normal in-line diesel engine, there is only one fuel injection pump, and the amount of fuel injected into each cylinder is the same, so the amount of heat injection into each cylinder can be changed during engine operation. I couldn't.

本発明の目的は前記従来のディーゼルエンジンの低負荷
連転時の欠点を解消し、多気筒ディーセルエンジンの負
荷が小さい時に、その一部気筒の吸入空気を遮断すると
共に、その気筒に燃料を供給しないようにしてエンジン
のポンピング損失を低減し、燃費が良く、未燃HCの排
出量も少なくすることがで遣る優れたディーゼルエンジ
ンの気筒数制御装置を提供することである。
The purpose of the present invention is to eliminate the disadvantages of the conventional diesel engine during low load continuous operation, and to cut off the intake air of some cylinders when the load of a multi-cylinder diesel engine is small, and to supply fuel to the cylinders. To provide an excellent cylinder number control device for a diesel engine that reduces pumping loss of the engine, improves fuel efficiency, and reduces the amount of unburned HC discharged.

前記目的を達成する本発明のディーゼルエンジンの気筒
数制御装置は、ディーゼルエンジンの一部気筒の吸気経
路を遮断する吸気遮断弁と、前記一部気筒への燃料圧送
経路に燃料逃し量調整弁を内蔵する分配型燃料噴射ポン
プと、エンジン負荷検出器とを備え、エンジン負荷が設
定値以下の時は前記吸気遮断弁を全閉、かつ前記燃料逃
し量調整弁を全開し、エン′、;/負荷が設定値を越え
た時は前記吸気遮断弁を全開、かつ前記燃料逃し量調整
弁をエンジン負荷の増加に応じて閉じるように構成した
ことを特徴としている。
A diesel engine cylinder number control device according to the present invention that achieves the above object includes an intake cutoff valve that cuts off the intake path of some of the cylinders of the diesel engine, and a fuel relief amount adjustment valve in the fuel pressure feeding path to the some of the cylinders. It is equipped with a built-in distribution type fuel injection pump and an engine load detector, and when the engine load is below a set value, the intake cutoff valve is fully closed and the fuel relief amount adjustment valve is fully opened. The present invention is characterized in that the intake cutoff valve is fully opened when the load exceeds a set value, and the fuel release amount adjustment valve is closed in response to an increase in the engine load.

以下図面を用いて本発明の一実施例を説明する。An embodiment of the present invention will be described below with reference to the drawings.

第1図は本発明の一実施例を示すディーゼルエンジンの
気筒数制御装置の全体構成図であり、1はディーゼルエ
ンジン、2iJ:tutマニホルド、4は燃料噴射ポン
プ、5は燃料噴射ノズル、12゜13はアクセルペダル
11に連動して燃料噴射ポンプ4よりの燃料噴射量を調
節するコントロールレ・ぐ−である。
FIG. 1 is an overall configuration diagram of a diesel engine cylinder number control device showing an embodiment of the present invention, in which 1 is a diesel engine, 2 is an iJ:tut manifold, 4 is a fuel injection pump, and 5 is a fuel injection nozzle. A control lever 13 adjusts the amount of fuel injected from the fuel injection pump 4 in conjunction with the accelerator pedal 11.

本実施例では4気筒デイーセルエンジン1の第2気筒(
#2)および第3気筒(#3)への燃料の供給を停止で
きるように燃料噴射ポンプ4の第2.3気筒への燃料噴
出路に燃料逃し量調整弁6を内蔵させると共に、前記気
筒(#2゜#3)の吸気マニホルド2には吸気遮断弁6
を設けて、これらの気筒への吸気も遮断できるようにし
ている。
In this embodiment, the second cylinder (
In order to stop the supply of fuel to the 2nd and 3rd cylinders (#2) and 3rd cylinder (#3), a fuel relief amount adjusting valve 6 is built into the fuel injection path of the fuel injection pump 4 to the 2nd and 3rd cylinders, and The intake manifold 2 (#2゜#3) has an intake cutoff valve 6.
is installed so that air intake to these cylinders can also be shut off.

前記燃料逃し量調整弁6を内蔵する燃料噴射ポンプ4の
構造は第2,3図に示す通りで、ポンプハウジング4a
内のチャンバ室4bに溜っている燃料は駆動軸4cおよ
びカムディスク4dの働きで往復動するプランジャ4e
によって分配され、各気筒の燃料圧送路4fからデリバ
リバルブ4gを経て各気筒の燃料噴射ノズルから噴射さ
れるようになっている。この燃料噴射蓋を調整するのが
スピルリング4hで、これはリンク4Iを介して前記コ
ントロールレバー12に連結している、本発明では前記
のように構成されている燃料噴射ポンプ4の第2.3気
筒(#21+3)の燃料圧送路4fにチャンバ室4bに
連通する燃料戻し通路23を設け、その途中に燃料逃し
量調整弁6を設けた。そしてこの燃料逃し量調整弁6は
スビルコントロールレ・!−18により回転して前記燃
料戻り通路26を開閉するようになっており、スピルコ
ントロールレバー18はリンク24によりコントロール
レバー16に連結している。コントロールレバー12.
15およびキャンセルスプリング17の動作については
後述する。
The structure of the fuel injection pump 4 incorporating the fuel relief amount adjusting valve 6 is as shown in FIGS. 2 and 3, and the pump housing 4a
The fuel accumulated in the chamber 4b inside the plunger 4e reciprocates by the action of the drive shaft 4c and cam disc 4d.
The fuel is distributed from the fuel pressure passage 4f of each cylinder, passes through the delivery valve 4g, and is injected from the fuel injection nozzle of each cylinder. This fuel injection lid is adjusted by a spill ring 4h, which is connected to the control lever 12 via a link 4I.In the present invention, the second spill ring 4h of the fuel injection pump 4 configured as described above is connected to the control lever 12 via a link 4I. A fuel return passage 23 communicating with the chamber chamber 4b was provided in the fuel pressure feeding passage 4f of the three cylinders (#21+3), and a fuel escape amount adjusting valve 6 was provided in the middle thereof. And this fuel release amount adjustment valve 6 is Subir Control Le! -18 to open and close the fuel return passage 26, and the spill control lever 18 is connected to the control lever 16 by a link 24. Control lever 12.
The operations of the cancel spring 15 and the cancel spring 17 will be described later.

第2,3図の状態のように燃料逃し量調整弁6が燃料戻
し通路26を閉じている時には、プランジャ4eにより
圧送される燃料はどの燃料圧送路4fからも燃料噴射弁
5に供給されるが、スピルコントロールレバー18が回
転して燃料戻し通路26が開いている時には、その開度
に応じて第2,3気筒に圧送される燃料は燃料戻し通路
26からチャンバ室4bに戻るようになっている。従っ
て燃料逃し量調整弁6が燃料戻し通路26を全開する時
には第2,3気筒に圧送される燃料は全量チャン・z室
4bに戻り、燃料噴射弁5からは全く燃料は噴射されな
い。
When the fuel relief amount adjusting valve 6 closes the fuel return passage 26 as in the state shown in FIGS. 2 and 3, the fuel pumped by the plunger 4e is supplied to the fuel injection valve 5 from any fuel pressure passage 4f. However, when the spill control lever 18 rotates and the fuel return passage 26 is open, the fuel that is pumped to the second and third cylinders returns from the fuel return passage 26 to the chamber 4b depending on the degree of opening. ing. Therefore, when the fuel escape amount adjusting valve 6 fully opens the fuel return passage 26, the entire amount of fuel that is force-fed to the second and third cylinders returns to the CH/Z chamber 4b, and no fuel is injected from the fuel injection valve 5.

前記スピルコントロールレバー18は、第1図に示すよ
うにリンク24により燃料噴射ポンプ4のコントロール
レバー16に連結しており、コントロールレバ′−16
が鎖線Cで示す設定回転角度を越えた時に回転するよう
になっているが、ゼロスピルリミッタ19および最大ス
ピルリミッタ20により最大回転角度および基準位置が
規定されている。21はリターンスプリングである。
The spill control lever 18 is connected to the control lever 16 of the fuel injection pump 4 by a link 24, as shown in FIG.
It is designed to rotate when exceeds a set rotation angle indicated by a chain line C, and the maximum rotation angle and reference position are defined by a zero spill limiter 19 and a maximum spill limiter 20. 21 is a return spring.

燃料噴射ポンプ4の燃料噴射量を制御するコントロール
レバーは、本発明では第1.4気筒の燃料噴射量を制御
するコントロールレバー12と第2,3気筒の燃料噴射
量を燃料逃し量調整弁により制御するコントロールレバ
ー16とに分かれており、両者はキャンセルスプリング
17によって連結されている。そしてこれらコントロー
ルレバー12 、16ハアクセルはダル11が踏まれて
いない状態ではリターンスプリング14とアイドルスト
ッパ16により第1図の位置で静止するようになってい
る。15はコントロールレバー12用のフルロードスト
ッパである。
In the present invention, the control lever that controls the fuel injection amount of the fuel injection pump 4 is a control lever 12 that controls the fuel injection amount of the 1st and 4th cylinders, and a fuel relief amount adjustment valve that controls the fuel injection amount of the 2nd and 3rd cylinders. It is divided into a control lever 16 and a control lever 16, which are connected by a cancel spring 17. These control levers 12, 16 and the accelerator are kept stationary at the position shown in FIG. 1 by a return spring 14 and an idle stopper 16 when the lever 11 is not depressed. 15 is a full load stopper for the control lever 12.

以上が本発明の燃料制御系の構成であるが、次に吸気マ
ニホルド2に設けた吸気量制御系の構成について説明す
る。
The configuration of the fuel control system of the present invention has been described above. Next, the configuration of the intake air amount control system provided in the intake manifold 2 will be explained.

第2,3気筒の吸気マニホルド2に設けられた吸気遮断
弁6はレバー26によりリンク25に接続しており、こ
のリンク25はソレノイド9に吸引された時に矢印E方
向に動いてレバー26をFのように回転させ、吸気遮断
弁3を開いて吸気を第2.3気筒に送り込むようになっ
ている。そしてソレノイド9はリレー8がオンした時に
リンク25を吸引し、リレー8は吸気遮断弁開閉スイッ
チ7の可動接点7aがスピルコントロールレバー18に
押圧されて固定接点7bに接触している間だけオンする
ようになっている。10はバッテリである。
The intake cutoff valve 6 provided in the intake manifold 2 of the second and third cylinders is connected to a link 25 by a lever 26, and when this link 25 is attracted by the solenoid 9, it moves in the direction of arrow E and moves the lever 26 to F. The intake air shutoff valve 3 is opened to send intake air into the second and third cylinders. The solenoid 9 attracts the link 25 when the relay 8 is turned on, and the relay 8 is turned on only while the movable contact 7a of the intake cutoff valve open/close switch 7 is pressed by the spill control lever 18 and is in contact with the fixed contact 7b. It looks like this. 10 is a battery.

本発明のディーゼルエンジンの気筒数制御装置の構成は
以上のようなもので、次にこの本発明の装置の気筒数制
御動作について説明する。
The configuration of the apparatus for controlling the number of cylinders of a diesel engine according to the present invention is as described above.Next, the operation for controlling the number of cylinders of the apparatus according to the present invention will be explained.

まず、エンジンの負荷条件を全負荷を1とし、その半分
を1/2のように表わして、気筒数を制御する負荷条件
の設定値を全負荷の172とし、この時のコントロール
レバー12.13の位置を鎖線Cの位置とすると、アイ
ドル状態から172負荷まではアクセルはダル11の踏
み込み蓄が少ないため、燃料噴射ポンプ4のコントロー
ルレバー12,13は鎖線で示したレノζ−位置BとC
の間を一体になって回転するが、リンク24は移動しな
い。この時燃料噴射ポンプ4は全気筒に対し同量の燃料
を噴射するが、前記のようにリンク24はスピルコント
ロールレバー18に力を作用させないので燃料逃し量調
整弁6は全開状態にあり、第2.3気筒へ噴射された燃
料は全て燃料戻し通路4sに流れて第2.3気筒の燃料
噴射ノズル5には燃料は供給されない。また、この時吸
気遮断弁開閉スイッチ7はオフ状態であるのでリレー8
およびソレノイド9は作動せず、吸気遮断弁6は全閉状
態となっている。
First, the load condition of the engine is set as the full load of 1, half of which is expressed as 1/2, and the set value of the load condition that controls the number of cylinders is set as the full load of 172. At this time, the control lever 12.13 Assuming that the position of the control levers 12 and 13 of the fuel injection pump 4 are set to the positions B and C indicated by the chain line, the control levers 12 and 13 of the fuel injection pump 4 are moved to the positions B and C indicated by the chain line.
However, the link 24 does not move. At this time, the fuel injection pump 4 injects the same amount of fuel to all cylinders, but as described above, the link 24 does not apply force to the spill control lever 18, so the fuel relief amount adjustment valve 6 is in the fully open state, and the All the fuel injected into the 2nd and 3rd cylinders flows into the fuel return passage 4s, and no fuel is supplied to the fuel injection nozzles 5 of the 2nd and 3rd cylinders. Also, at this time, the intake cutoff valve open/close switch 7 is in the off state, so the relay 8
The solenoid 9 is not operated, and the intake cutoff valve 6 is in a fully closed state.

次に、さらに負荷が上昇してアクセルぼダル 。Next, the load increases further and the accelerator is pressed down.

11の踏み込み量が増加すると、第1,4気筒用のコン
トロールレバー12はフルロ−ゞストッパ15に当り、
これ以上回転しなくなる。この時第1,4気筒は全負荷
状態であるが、エンジン全体としての負荷は1/2とな
っている。
11 increases, the control lever 12 for the first and fourth cylinders hits the full-low stopper 15,
It will no longer rotate. At this time, the first and fourth cylinders are under full load, but the load on the engine as a whole is 1/2.

ところが、第2,3気筒用の、これまでキャンセルスプ
リング17の働きによりコントロールレバー16と一体
になって回転していたコントロールレバー16は、もと
もと別体であるだメニコントロールレパー12がフルロ
ードストッパ15に回転を制止されてもその−1ま回転
を続けることができ、鎖線Cを越えるとリンク24t=
介してスピルコントロールレノS−18r回転させる。
However, the control lever 16 for the second and third cylinders, which until now rotated in unison with the control lever 16 due to the action of the cancel spring 17, was originally a separate body, but the menu control lever 12 was replaced by the full load stopper 15. Even if the rotation is stopped by , it can continue rotating until -1, and when it crosses the chain line C, the link 24t=
Spill control Leno S-18r rotates through.

このためスピルコントロールレノ5−18の回転角の増
大に伴って燃料逃し量調整弁6が燃料戻し通路23への
通路を閉じる方向に動き、第2゜3気筒には次第に燃料
が供給されるようになる。
Therefore, as the rotation angle of the spill control lever 5-18 increases, the fuel release amount adjustment valve 6 moves in the direction of closing the passage to the fuel return passage 23, so that fuel is gradually supplied to the 2nd and 3rd cylinders. become.

同時に吸気遮断弁開閉スイッチ7がオンになり、リレー
8を介してソレノイド9ヘパツテリ10が接続されるだ
めリンク25が吸引され、し、5−26が回転して吸気
遮断弁6が全開となり、第2,3気筒の作動が開始され
る。さらにアクセルペダル11を踏み込んでいくと、ス
ピル−一ントロールレバー18がゼロスピルリミッタ1
9に当たりこれ以上回転しなくなる。この時燃料逃し量
調整弁6は全閉となり、第2,3気筒には燃料噴射ポン
プ4の噴射燃料が全量供給される。この間第1,4気筒
は常に全負荷で運転されており、燃料逃し量調整弁6が
全閉となった状態で本発明のディーゼルエ/:)ン1は
最大出力を得ることができる。アクセルはダル11を戻
すと今までと全く逆の順序でエンジンは減気筒運転に戻
ることになる。
At the same time, the intake cutoff valve open/close switch 7 is turned on, and the solenoid 9 is connected to the stopper link 25 via the relay 8. Then, the link 25 is sucked, and 5-26 is rotated to fully open the intake cutoff valve 6. The operation of the second and third cylinders is started. When the accelerator pedal 11 is further depressed, the spill-one control lever 18 moves to the zero spill limiter 1.
It hits 9 and will no longer rotate. At this time, the fuel release amount adjusting valve 6 is fully closed, and the entire amount of fuel injected by the fuel injection pump 4 is supplied to the second and third cylinders. During this time, the first and fourth cylinders are always operated at full load, and the diesel engine 1 of the present invention can obtain maximum output with the fuel escape amount regulating valve 6 fully closed. When the accelerator is turned back to 11, the engine will return to reduced cylinder operation in the complete reverse order.

このように本発明のディーゼルエンジンの気筒数制御装
置によれば、アイドル(無負荷)から1/2負荷までは
ディーゼルエンジン1の第2.3気筒は吸気遮断と燃料
遮断が同時に行なわれており、作動するのは第1,4気
筒のみである。従って、アイドルから1/2負荷までは
第2,3気筒のホンピング損失がなくなるため、第4図
の実線で示すように破線で示す従来の標準ディーゼルエ
ンジンに比べてエンジン全体の摩擦損失が大幅に低下す
る。このだめ特に低負荷域での使用頻度が高い乗用車用
のディーゼルエンジン等では第5図の実線で示すように
従来(破線)に比べて大幅に燃費が向上している。
As described above, according to the diesel engine cylinder number control device of the present invention, from idle (no load) to 1/2 load, intake cutoff and fuel cutoff are performed simultaneously for the 2nd and 3rd cylinders of the diesel engine 1. , only the first and fourth cylinders operate. Therefore, from idle to 1/2 load, there is no pumping loss in the second and third cylinders, so the friction loss of the entire engine is significantly reduced, as shown by the solid line in Figure 4, compared to the conventional standard diesel engine shown by the broken line. descend. For this reason, especially in diesel engines for passenger cars, which are frequently used in low load ranges, the fuel efficiency is significantly improved compared to the conventional engine (broken line), as shown by the solid line in FIG.

また、低負荷時には一般的T未然HCも急増するが、作
動している第1,4気筒の負荷は標準ディーゼルエンジ
ンに比べて相対的に増加し、HC急増域を外れた領域で
運転されると共に、排気ガス量も112になるため全体
として第6図に示す(実線が本発明、破線が従来)よう
に排気ガス中の大幅なIC濃度の低減を図ることができ
る。
In addition, at low loads, the HC of a typical T increases rapidly, but the load on the operating No. 1 and 4 cylinders increases relatively compared to a standard diesel engine, and the engine is operated outside the HC rapid increase range. At the same time, since the amount of exhaust gas is also 112, it is possible to significantly reduce the IC concentration in the exhaust gas as shown in FIG. 6 as a whole (the solid line is the present invention, the broken line is the conventional example).

本実施例では4気筒中の2気筒の作動を低負荷時に停止
させる場合について説明したが、負荷条件の差によって
は1気筒分のみ作動を停止させることも容易に実施でき
る。
In this embodiment, a case has been described in which the operation of two of the four cylinders is stopped at a low load, but depending on the difference in load conditions, it is also possible to easily stop the operation of only one cylinder.

また、3気筒や6気筒のディーセルエンジンの場合には
それぞれその第2気筒、第4.5.6気筒の作動を停止
させるというように、気筒数が異なっても本発明は容易
に実施することができる。
Furthermore, in the case of a 3-cylinder or 6-cylinder diesel engine, the present invention can be easily implemented even if the number of cylinders is different, such as stopping the operation of the 2nd cylinder, 4th, 5th, and 6th cylinders, respectively. I can do it.

以上説明したように本発明のディーゼルエンジンの気筒
数制御装置は、多気筒ディーゼルエンジンの負荷が小さ
い時に、その一部気筒の吸入空気を遮断すると共に、そ
の気筒に燃料を供給しないようにしてエンジンのポンピ
ング損失を低減させたことにより、燃費が向上し、未然
HCの排出量も少なくすることができて省エネルギーお
よび公害防止に優れた効果を発揮することができる。
As explained above, when the load of a multi-cylinder diesel engine is small, the diesel engine cylinder number control device of the present invention cuts off the intake air of some of the cylinders and prevents fuel from being supplied to that cylinder. By reducing the pumping loss, fuel efficiency is improved, and the amount of HC discharged can be reduced, resulting in excellent energy saving and pollution prevention effects.

そして、本発明では一部気筒に燃料を供給しないように
する燃料逃し量調整弁を燃料噴射ポンプに内蔵させたこ
とにより、装置が小型になり、燃料噴射管の配管も楽に
なるという効果がある。
In addition, in the present invention, the fuel injection pump has a built-in fuel relief amount adjustment valve that prevents fuel from being supplied to some cylinders, which has the effect of making the device smaller and making the piping of the fuel injection pipe easier. .

なお、第7図に示すようにディーゼルエンジン1の排気
マニホルド27に、吸気マニホルド2の吸気遮断弁乙に
連動して全く同じ動作をするように排気遮断弁28をし
・5−29を介してリンク25に接続すればホンピング
損失は一層少なくなり、上記効果が増大する。
As shown in FIG. 7, an exhaust cutoff valve 28 is installed in the exhaust manifold 27 of the diesel engine 1 so as to operate in exactly the same manner as the intake cutoff valve B of the intake manifold 2. If connected to the link 25, the homping loss will be further reduced and the above effect will be increased.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示すディーゼルエンジンの
気筒数制御装置の全体構成図、第2図は第1図の燃料逃
し量調整弁を内蔵する燃料噴射ポンプの断面図、第3図
は第2図A−A線における断面図、第4図から第6図は
本発明のディーゼルエンジンと従来の標準ディーゼルエ
ンジンの性能比較を示す線図であって第4図は回転数対
摩擦損失、第5図は負荷条件対燃費率、第6図は負荷条
件対IC濃度の関係を示す線図、第7図は本発明の別の
実施例を示すディーゼルエンジンの吸排気系の構成図で
ある。 1・・・ティー七ルエンジン、2・・・吸気マニホルド
、6・・・吸気遮断弁、4・・・燃料噴射ポンプ、5・
・・燃料噴射ノズル、6・・・燃料逃し量調整弁、7・
・・吸気遮断弁開閉スイッチ、8・・・リレー、9・ソ
レメイド、11・・・アクセルはダル、12.13・・
・コントロールレバー、18・・・スピルコントロール
レバー、22.22’・・・燃料噴射管、26・・・燃
料戻し通路23゜ 代理人 小 川 信 − 野  口  賢 照 斉下和彦
Fig. 1 is an overall configuration diagram of a diesel engine cylinder number control device showing an embodiment of the present invention, Fig. 2 is a sectional view of a fuel injection pump incorporating the fuel relief amount adjustment valve of Fig. 1, and Fig. 3 is a cross-sectional view taken along the line A-A in Figure 2, and Figures 4 to 6 are diagrams showing a performance comparison between the diesel engine of the present invention and a conventional standard diesel engine, and Figure 4 shows the friction loss versus rotation speed. , FIG. 5 is a graph showing the relationship between load conditions and fuel efficiency, FIG. 6 is a diagram showing the relationship between load conditions and IC concentration, and FIG. 7 is a diagram showing the configuration of the intake and exhaust system of a diesel engine showing another embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 1... Tee seven engine, 2... Intake manifold, 6... Intake cutoff valve, 4... Fuel injection pump, 5...
... Fuel injection nozzle, 6... Fuel relief amount adjustment valve, 7.
・・Intake cutoff valve open/close switch, 8・Relay, 9・Solemade, 11・Accelerator is dull, 12.13・・
・Control lever, 18... Spill control lever, 22. 22'... Fuel injection pipe, 26... Fuel return passage 23° Agents Shin Ogawa - Ken Noguchi Kazuhiko Terusai Shimo

Claims (1)

【特許請求の範囲】[Claims] ディーゼルエンジンの一部気筒の吸気経路を遮断する吸
気遮断弁と、前記一部気筒への燃料圧送経路に燃料逃し
量調整弁を内蔵する分配型燃料噴射ポンプと、エンジン
負荷検出器とを備え、エンジン負荷が設定値以下の時は
前記吸気遮断弁を全開、かつ前記燃料逃し量調整弁を全
開し、エンジン負荷が設定値を越えた時は前記吸気遮断
弁を全開、かつ前記燃料逃し量調整弁をエンジン負荷の
増加に応じて閉じるように構成したディーゼルエンジン
の気筒数制御装置2
An intake cutoff valve that shuts off an intake path of some of the cylinders of a diesel engine, a distribution fuel injection pump that has a built-in fuel relief amount adjustment valve in a fuel pressure feeding path to the some of the cylinders, and an engine load detector, When the engine load is below the set value, the intake cutoff valve is fully opened and the fuel release amount adjustment valve is fully opened, and when the engine load exceeds the set value, the intake cutoff valve is fully opened and the fuel release amount is adjusted. A diesel engine cylinder number control device 2 configured to close a valve in response to an increase in engine load.
JP15556981A 1981-09-30 1981-09-30 Cylinder quantity control device of diesel engine Granted JPS5857043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15556981A JPS5857043A (en) 1981-09-30 1981-09-30 Cylinder quantity control device of diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15556981A JPS5857043A (en) 1981-09-30 1981-09-30 Cylinder quantity control device of diesel engine

Publications (2)

Publication Number Publication Date
JPS5857043A true JPS5857043A (en) 1983-04-05
JPH0154534B2 JPH0154534B2 (en) 1989-11-20

Family

ID=15608903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15556981A Granted JPS5857043A (en) 1981-09-30 1981-09-30 Cylinder quantity control device of diesel engine

Country Status (1)

Country Link
JP (1) JPS5857043A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114819A (en) * 1976-03-23 1977-09-27 Daimler Benz Ag Method and device for controlling multiicylinder internal combustion engine
JPS5413825A (en) * 1977-07-05 1979-02-01 Nissan Diesel Motor Co Ltd Idling controller for multicylinder diesel engine
JPS54122220U (en) * 1978-02-15 1979-08-27
JPS55161034U (en) * 1979-05-08 1980-11-19

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52114819A (en) * 1976-03-23 1977-09-27 Daimler Benz Ag Method and device for controlling multiicylinder internal combustion engine
JPS5413825A (en) * 1977-07-05 1979-02-01 Nissan Diesel Motor Co Ltd Idling controller for multicylinder diesel engine
JPS54122220U (en) * 1978-02-15 1979-08-27
JPS55161034U (en) * 1979-05-08 1980-11-19

Also Published As

Publication number Publication date
JPH0154534B2 (en) 1989-11-20

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