JPS58202340A - Cylinder number control engine - Google Patents

Cylinder number control engine

Info

Publication number
JPS58202340A
JPS58202340A JP8536082A JP8536082A JPS58202340A JP S58202340 A JPS58202340 A JP S58202340A JP 8536082 A JP8536082 A JP 8536082A JP 8536082 A JP8536082 A JP 8536082A JP S58202340 A JPS58202340 A JP S58202340A
Authority
JP
Japan
Prior art keywords
cylinders
engine
fuel
change gear
drive range
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
Application number
JP8536082A
Other languages
Japanese (ja)
Inventor
Shizuo Ishizawa
石澤 静雄
Shunichi Aoyama
俊一 青山
Kenji Ikeura
池浦 憲二
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP8536082A priority Critical patent/JPS58202340A/en
Publication of JPS58202340A publication Critical patent/JPS58202340A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE:To keep off any drop in engine speed at the time of shifting a speed change gear, by switching to the operation mode with all cylinders at a drive range in time of idling, in case of cylinder number control of an engine for a car fitted with an automatic speed change gear. CONSTITUTION:A signal out of an intake air flow meter 8 installed in a suction pipe 1 of an internal-combustion engine mounted with cylinders A-F and an engine speed signal are inputted into a control unit 15, and fuel feed from fuel injection valves d-f of cylinders D-F is intercepted at the time of light loading. In addition, the control unit 15 receives a signal from a position sensor 14 of an automatic speed change gear 13, and when this speed change gear 13 is shifted in a drive range in a state of idling, the interception of fuel from injection valves d-f is released, turning to the operation mode with all cylinders. Therefore, in time of shifting from neutral to drive range, a drop in idling revolution due to an increase in load can be prevented so that smooth starting performance can be thus secured.

Description

【発明の詳細な説明】 この発明は、エンジン軽負荷域等で一部気筒の作動を休
止させて部分気筒運転を行なう気筒数制御エンジンの改
良に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cylinder number control engine that performs partial cylinder operation by suspending the operation of some cylinders in a light engine load range or the like.

一般に、エンジンを高い負荷状態で運転すると燃費が良
好になる傾向があシ、このため多気筒エンジンにおいて
、エンジン負荷の小さいときに一部気筒への燃料の供給
をカットして作動を休止させ、この分だけ残りの稼動側
気筒の負荷を相対的に高め、全体として軽負荷領域の燃
費を改善するようにした気商数制御エンジンが考えられ
た。
Generally, fuel efficiency tends to improve when an engine is operated under a high load. Therefore, in a multi-cylinder engine, fuel supply to some cylinders is cut to stop operation when the engine load is low. An air quotient control engine was devised that relatively increases the load on the remaining active cylinders by this amount, thereby improving overall fuel efficiency in the light load range.

(特開昭55−37581.特願昭54−30729等
)本出願人が先に提案したこの種のエンジンでは、第1
図に示すように、稼動側の気筒A−Cと休止側の気筒D
−Fに対応して吸気通路lが絞弁2の下流にて稼動側吸
気通路3と休止側吸気通路4とに分割され、排気通路5
も途中まで稼動側排気通路6と休止側排気通路7とに分
割されている。
(Japanese Patent Application Laid-Open No. 55-37581, Patent Application No. 54-30729, etc.) In this type of engine previously proposed by the applicant, the first
As shown in the figure, cylinders A-C on the operating side and cylinder D on the idle side
-F, the intake passage 1 is divided downstream of the throttle valve 2 into an operating side intake passage 3 and a rest side intake passage 4, and an exhaust passage 5
It is also divided halfway into an active side exhaust passage 6 and a rest side exhaust passage 7.

そして、エンジンの軽負荷域で気筒D−Fの作動を休止
させるときには、例えば吸入空気量針8からの吸入空気
量信号や図示しないイグニッションコイルからの回転数
信号に基づき、回転数に比して負荷が所定値以下に下が
ると、制御回路9が気筒D−Fに対応する燃料噴射弁d
−fを全閉保持して燃料の供給を遮断すると共に、休止
側吸気通路4の上流部に設けた遮断弁10を閉じ、同時
にこの遮断弁lO下流と休止側排気通路7とを接続する
循環通路11の弁12を開いて休止側気筒D−Fへ排気
の一部を還流させる。
When stopping the operation of cylinders D-F in the light load range of the engine, for example, based on the intake air amount signal from the intake air amount needle 8 and the rotation speed signal from the ignition coil (not shown), the engine speed is compared to the rotation speed. When the load falls below a predetermined value, the control circuit 9 activates the fuel injection valve d corresponding to the cylinder D-F.
-F is held fully closed to cut off the fuel supply, and at the same time, the shutoff valve 10 provided upstream of the idle side intake passage 4 is closed, and at the same time, the downstream of this shutoff valve lO is connected to the idle side exhaust passage 7. The valve 12 of the passage 11 is opened to recirculate a portion of the exhaust gas to the cylinders DF on the inactive side.

これによシ、休止側気筒D−Fにおけるボンピングロス
を低減しつつ稼動側気筒A−Cのみの作動による部分気
筒運転を行なっている。
As a result, partial cylinder operation is performed by operating only the active cylinders A to C while reducing the pumping loss in the idle cylinders D to F.

また、絞弁2が全閉し、負荷、回転数が共に小さいアイ
ドリンク時にも、同様にして部分気筒運転が行なわれる
。ただし、部分気筒J!1!転時に、エンジン出力を全
気筒運転時と同一に保つため、制御回路9内で稼動側気
筒A−Cに対応する噴射弁a ”−cの噴射定数が略2
倍となるように切換えられる。
Further, partial cylinder operation is performed in the same manner even during idling when the throttle valve 2 is fully closed and both the load and the rotational speed are small. However, partial cylinder J! 1! In order to keep the engine output the same as when all cylinders are operated, the injection constant of the injection valves a''-c corresponding to the working cylinders A-C is set to approximately 2 in the control circuit 9.
It can be switched to double.

ところで、このよう壜エンジンを、最近−膜化しつつあ
る自動変速機付の車両に搭載した場合、アイドリンク時
には部分気筒運転が行なわれるが、例えばこの状態から
発進しようとして自動変速機のシフト位置をノや一キン
グま・喪はニュートラルからドライブレンジへ切換える
と、アイドル吸気i(混合気t)がほぼ一定に維持され
る反面、トルクコンバータの回転負荷がエンノンにかか
るため、アイドリンク回転数が急激に降下してしまう。
By the way, when such a bottle engine is installed in a vehicle equipped with an automatic transmission, which is becoming increasingly common these days, partial cylinder operation is performed during idling. When switching from neutral to drive range, the idle intake air i (mixture t) is maintained almost constant, but the rotational load of the torque converter is applied to the engine, so the idle link rotation speed suddenly increases. It will fall to.

また、稼動側気筒間の爆発間隔が長いことから回転変動
が増大しやすく、その結果円滑な発進性能が得られない
という問題があった。
Furthermore, since the interval between explosions between active cylinders is long, rotational fluctuations tend to increase, resulting in a problem in that smooth starting performance cannot be obtained.

この発明は、このような問題点に着目してなされ喪もの
で、アイドリンク時でも自動変速機のシフト位置がドラ
イブレンジに入れば、強制的に全気筒運転を行なうよう
に構成して機関状態を安定に維持することによシ、上記
問題点の解決を図っりfi筒数制御エンジンの提供を目
的とする。
This invention was made in view of these problems, and is designed to forcibly operate all cylinders if the shift position of the automatic transmission enters the drive range even during idling, thereby changing the engine state. The purpose of the present invention is to provide an engine with a controlled number of FI cylinders, which solves the above-mentioned problems by maintaining the number of FI cylinders stably.

以下、本発明を図面に基づいて説明する。第2図は本発
明の一実施例を示すもので、この例では常時燃料と新気
が供給され作動を継続する稼動側気筒A−Cと、後述す
る条件、領域において燃料の供給が遮断され作動を休止
(燃焼を中止)する休止側気筒D−Fの位置が第1図と
入れ替えである。
Hereinafter, the present invention will be explained based on the drawings. FIG. 2 shows an embodiment of the present invention. In this example, the operating cylinders A-C are constantly supplied with fuel and fresh air and continue to operate, and the fuel supply is cut off under the conditions and regions described below. The positions of the cylinders D-F on the deactivation side where operation is suspended (combustion is stopped) are interchanged with those in FIG. 1.

そして、これらの気筒A−C,D−Fに対応して吸気通
Ulと排気通路5が、それぞれ稼動側吸気通路3と休止
側吸気通路4、稼動側排気通路6と休止側排気通路7に
分割されると共に、休止側吸気通路4の上流部には遮断
弁10が、この遮断弁10下流の休止側吸気通路4と休
止側排気通路7とを接続する循環通路11にはダイヤフ
ラム弁12が介装されている。
Then, the intake passage Ul and the exhaust passage 5 correspond to these cylinders A-C and D-F, and the working side intake passage 3 and the idle side intake passage 4, the working side exhaust passage 6 and the idle side exhaust passage 7, respectively. A cutoff valve 10 is provided in the upstream portion of the inactive intake passage 4, and a diaphragm valve 12 is provided in the circulation passage 11 that connects the inactive intake passage 4 and the inactive exhaust passage 7 downstream of this cutoff valve 10. It has been intervened.

一方、このエンジンの出力軸に自動変速4fi13が連
結され、変速fi13側部にシフト位rjtを検出する
手段としての位置センサ14が設けられる。
On the other hand, an automatic transmission 4fi13 is connected to the output shaft of this engine, and a position sensor 14 as means for detecting a shift position rjt is provided on the side of the transmission fi13.

この位置センサ14は、シフト位置がドライブレンジの
ときに閉じ、ニュートラル、ノ臂−キングのときに開く
例えば第3図に示すよう表スイッチが用いられる。
This position sensor 14 is closed when the shift position is in the drive range, and opens when the shift position is in neutral or in the forward position.For example, a front switch as shown in FIG. 3 is used.

この位置センサ14の検出信号は、エンジンの軽負荷状
態を検出する手段として絞弁2の上流に設置した吸入空
気置針8からの吸入窒気量信号と、図示しないイグニツ
シジンコイルからの回転数信号と共に制御装置15に送
られる。
The detection signal of this position sensor 14 is an intake nitrogen amount signal from an intake air pointer 8 installed upstream of the throttle valve 2 as a means for detecting a light load state of the engine, and a rotation speed from an ignition coil (not shown). It is sent to the control device 15 along with the signal.

そして、制御装[15は、これらの信号に基づき、エン
ジン回転数に比して負荷が所定値以下の軽負荷域では、
休止側気筒D−Fに対応する燃料噴射弁d−fを全閉保
持して燃料の供給を遮断し、その作動を休止させる。(
制御装[15は燃料供給を遮断する手段である。)また
、これと同時に休止側吸気通路4の遮断弁】0を閉じ、
循環通路11のダイヤフラム弁12を開いて休止側気筒
D〜Fに排気の一部を還流させ、部分気筒運転を行なう
Based on these signals, the control device [15] operates in a light load range where the load is less than a predetermined value compared to the engine speed.
The fuel injection valve d-f corresponding to the deactivated cylinder D-F is held fully closed to cut off the fuel supply and its operation is suspended. (
The control device [15 is a means for cutting off fuel supply. ) Also, at the same time, close the shutoff valve ]0 of the intake passage 4 on the idle side,
The diaphragm valve 12 of the circulation passage 11 is opened to recirculate part of the exhaust gas to the cylinders D to F on the inactive side, thereby performing partial cylinder operation.

他方、制御装置15は、無負荷でかつ二ンノン回転数が
一定以下のアイドリンク領域で自動変速機13のシフト
位置がドライブレンジに入っているときには、噴射弁d
−fからの燃料の遮断を解除する指令を出すと共に、遮
断弁lOを開きダイヤプラム−M−12を開いて休止側
気筒D−Fの作動を復帰(開始)させ、全気筒運転を行
なう。
On the other hand, the control device 15 controls the injection valve d when the shift position of the automatic transmission 13 is in the drive range in an idle link region where there is no load and the engine speed is below a certain level.
At the same time, a command is issued to cancel the cutoff of fuel from -f, and the shutoff valve lO is opened and diaphragm -M-12 is opened to restore (start) the operation of the cylinder D-F on the idle side, and all cylinders are operated.

この場合、自動変速機13のシフト位置がニュートラル
や/4’−キングのときにはもちろん無負荷であるから
部分気筒運転を行なうようにコントロールする。
In this case, when the shift position of the automatic transmission 13 is neutral or /4'-king, there is of course no load, so control is performed to perform partial cylinder operation.

なお、燃料噴射弁axe、d=fからの噴射量は吸入空
気蓋信号および排気通路5下流に設けた酸素センサ16
からのフィードバック信号に応じて制御装置15によ)
各気筒A〜Fで最適空燃比の混合気が得られるように制
御される。
The injection amount from the fuel injection valve axe, d=f is determined by the intake air lid signal and the oxygen sensor 16 provided downstream of the exhaust passage 5.
(by the control device 15 in response to a feedback signal from)
The air-fuel mixture is controlled to have an optimum air-fuel ratio in each cylinder A to F.

このように構成したので、エンジンの軽負荷域では、稼
動側気筒A−Cのみの作動による部分気筒運転が行なわ
れ、その負荷を高めて燃費を改善することができる。
With this configuration, in the light load range of the engine, partial cylinder operation is performed by operating only the active cylinders A to C, and the load can be increased to improve fuel efficiency.

また、自動変速機13のシフト位置がニュートラルやi
J?−キングの時にも部分気筒運転が行なわれ、したが
って一時停車中や信号待ち等のアイドリンク時に燃料が
無駄に消費されることが防止される。
In addition, the shift position of the automatic transmission 13 may be neutral or i.
J? - Partial cylinder operation is performed even when the vehicle is in the king position, thus preventing fuel from being wasted when the vehicle is temporarily stopped or idling while waiting at a traffic light.

これに対して、軽負荷域以外の領域で自動変速機13が
ドライブレンジにシフトされている時には、アイP I
Jング時であっても全気筒運転が行なわれる。
On the other hand, when the automatic transmission 13 is shifted to the drive range in a region other than the light load region, the iP I
All-cylinder operation is performed even when the engine is in J mode.

したがって、シフト位置がニュートラルやノ臂−キング
のアイドリング状態から発進しようとしてドライブレン
ジに入れると、部分気筒運転から全気筒運転に移行され
、このためトルクコン・臂−タの負荷がかかつても従来
例のように回転数が降下してしまうことはなく、また回
転変動の増加を抑制して機関状態を安定に維持すること
ができる。
Therefore, when the shift position is in neutral or idling, and the drive range is entered in an attempt to start, the shift position shifts from partial cylinder operation to full cylinder operation, which increases the load on the torque converter and armpit, even compared to the conventional case. The rotational speed does not drop as in the above case, and the engine condition can be maintained stably by suppressing an increase in rotational fluctuation.

そして、この状態からアクセルを踏み込んで行けば、出
力が徐々に高tb、スムーズに発進することができる。
If you step on the accelerator from this state, the output will gradually increase to a higher tb, allowing you to start the vehicle smoothly.

このようにして、円滑な発進性能、運転性能が確保され
るのである。
In this way, smooth starting performance and driving performance are ensured.

第4図は本発明の他の実施例で、休止側気筒り。FIG. 4 shows another embodiment of the present invention, showing a cylinder on the idle side.

Eへの燃料供給を遮断する手段として休止側気筒り、E
の吸、排気弁(図示しない)の開作動を規制するように
したものである。この場合、吸、排気弁を駆動するカム
をそれぞれに対応して2種類設け、前述した部分気筒運
転時に制御装置15からの指令によってカムに係合する
アクチュエータ17を作動し、カムを切換えることによ
シ、例えば吸、排気弁を閉止状態に保つ。
As a means of cutting off fuel supply to E, the cylinder on the idle side is
The opening operation of the intake and exhaust valves (not shown) is restricted. In this case, two types of cams are provided to drive the intake and exhaust valves, and the actuator 17 that engages with the cam is actuated by a command from the control device 15 during the above-mentioned partial cylinder operation to switch the cam. For example, keep the intake and exhaust valves closed.

したがって、休止’ ln気筒D 、 hc、では燃料
、新気とも遮断され、作動を休止する。これによれば、
第2図のように邂断弁lOや循環通路11を設ける必蒙
がなく、制御も容易である。
Therefore, in the idle cylinders D and hc, both fuel and fresh air are cut off, and the operation is suspended. According to this,
It is not necessary to provide a blow-off valve lO or a circulation passage 11 as shown in FIG. 2, and control is easy.

ただし、第4図は4気筒エンジンに通用した例で、燃料
供給系に気化器21を用いている−また、図中18は点
火コイル19からディストリビュータ20を介して休止
側気筒り、Eの点火栓(図示しない)に送られる点火電
流を断続するスイッチを示し、部分気筒運転時に制御装
置15からの指令によシ開かれ、電力を節減する。
However, Fig. 4 shows an example that is applicable to a 4-cylinder engine, and uses a carburetor 21 in the fuel supply system. A switch is shown for intermittent ignition current sent to a plug (not shown) and is opened upon command from controller 15 during partial cylinder operation to save power.

なお、13は自動変速機で、その側部にはシフト位置を
検出する位置センサ14が設けられるが、前記実施例を
含めて、例えばアイドリンク回転数の急激な低下を検出
し、これによりシフト位置がトルクコンバータを連結す
るドライブレンジに入ったことを確認(検出)するよう
にしてシ良い。
Reference numeral 13 denotes an automatic transmission, and a position sensor 14 is provided on the side thereof to detect the shift position. It is recommended to confirm (detect) that the position is within the drive range to which the torque converter is connected.

以上説明した通シ、本発明によれば、自動変速機付の車
両に気筒数制御エンジンを適用する場合、エンジンの軽
負荷状態と、自動変速機のシフト位置とを検出し、軽負
荷域やシフト位置がニュートラル、ノ臂−キングのとき
には休止側気筒への燃料供給を遮断して部分気筒運転を
行ない、一方アイドリンク領域でシフト位置がドライブ
レンジに入つているときには燃料の遮断を解除して全気
筒運転を行なうようにしたので、常に機関状態を最良に
維持して、走行燃費の向上が図れ、円滑な発進性能、運
転性能が得られるという効果がある。
As described above, according to the present invention, when applying a cylinder number control engine to a vehicle equipped with an automatic transmission, the light load state of the engine and the shift position of the automatic transmission are detected, and the light load range and the shift position of the automatic transmission are detected. When the shift position is in neutral or in the forward position, fuel supply to the cylinder on the idle side is cut off to perform partial cylinder operation, while when the shift position is in the drive range in the idle link region, the fuel cutoff is released. Since all cylinders are operated, the engine condition can always be maintained at its best, improving driving fuel efficiency, and providing smooth starting performance and driving performance.

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

第1図Fi便来例の構成断面図、第2図は本発明の一実
施例を示す構成断面図、′i43図はその部分側面図、
第4図は本発明の他の実施例を示す概略構成VflT面
図である。 2・・・絞弁、8・・・吸入空気置針、13・・・自動
変速機、14・・・位置センサ、15・・・制御装置、
特許出願人  日産自動車株式会社
Fig. 1 is a cross-sectional view of the structure of the conventional Fi service, Fig. 2 is a cross-sectional view of the structure showing an embodiment of the present invention, Fig. 43 is a partial side view thereof,
FIG. 4 is a schematic VflT plane view showing another embodiment of the present invention. 2... Throttle valve, 8... Intake air position needle, 13... Automatic transmission, 14... Position sensor, 15... Control device,
Patent applicant Nissan Motor Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 自動変速機付の車両に搭載される多気筒エンジンにおい
て、エンジンの軽負荷状態ならびにアイドリンク状態を
検出する手段と、自動変速機のシフト位置を検出する手
段と、−邪気筒への燃料供給を連断する手段とを設け、
軽負荷で一部気筒への燃料供給を遮断する一方、アイド
リング時にはシフト位置がドライブレンジのときには燃
料遮断を解除する制御装置を備えたことを特徴とする気
筒数制御エンジン。
In a multi-cylinder engine installed in a vehicle with an automatic transmission, a means for detecting a light load state and an idling state of the engine, a means for detecting a shift position of the automatic transmission, and a means for supplying fuel to a wrong cylinder. and a means for connecting the
An engine that controls the number of cylinders, comprising a control device that cuts off fuel supply to some cylinders under light loads, while canceling the fuel cutoff when the shift position is in the drive range during idling.
JP8536082A 1982-05-20 1982-05-20 Cylinder number control engine Pending JPS58202340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8536082A JPS58202340A (en) 1982-05-20 1982-05-20 Cylinder number control engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8536082A JPS58202340A (en) 1982-05-20 1982-05-20 Cylinder number control engine

Publications (1)

Publication Number Publication Date
JPS58202340A true JPS58202340A (en) 1983-11-25

Family

ID=13856539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8536082A Pending JPS58202340A (en) 1982-05-20 1982-05-20 Cylinder number control engine

Country Status (1)

Country Link
JP (1) JPS58202340A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023028A1 (en) * 2000-09-14 2002-03-21 Toyota Jidosha Kabushiki Kaisha Controller of variable cylinder engine and controller of vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002023028A1 (en) * 2000-09-14 2002-03-21 Toyota Jidosha Kabushiki Kaisha Controller of variable cylinder engine and controller of vehicle
US6629024B2 (en) 2000-09-14 2003-09-30 Toyota Jidosha Kabushiki Kaisha Control apparatus for variable-cylinder engine, and control apparatus for vehicle
US6868674B2 (en) 2000-09-14 2005-03-22 Toyota Jidosha Kabushiki Kaisha Control apparatus for variable-cylinder engine, and control apparatus for vehicle
US7243010B2 (en) 2000-09-14 2007-07-10 Toyota Jidosha Kabushiki Kaisha Control apparatus for variable-cylinder engine, and control apparatus for automotive vehicle including variable-cylinder engine

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