JP2908281B2 - Supply valve control method and apparatus for large marine diesel engine - Google Patents

Supply valve control method and apparatus for large marine diesel engine

Info

Publication number
JP2908281B2
JP2908281B2 JP7109569A JP10956995A JP2908281B2 JP 2908281 B2 JP2908281 B2 JP 2908281B2 JP 7109569 A JP7109569 A JP 7109569A JP 10956995 A JP10956995 A JP 10956995A JP 2908281 B2 JP2908281 B2 JP 2908281B2
Authority
JP
Japan
Prior art keywords
cylinder
supply valve
opening
closing
air supply
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
Application number
JP7109569A
Other languages
Japanese (ja)
Other versions
JPH08303275A (en
Inventor
一 山田
哲男 野上
修一 佐藤
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.)
Kawasaki Motors Ltd
Original Assignee
Kawasaki Jukogyo KK
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 Kawasaki Jukogyo KK filed Critical Kawasaki Jukogyo KK
Priority to JP7109569A priority Critical patent/JP2908281B2/en
Publication of JPH08303275A publication Critical patent/JPH08303275A/en
Application granted granted Critical
Publication of JP2908281B2 publication Critical patent/JP2908281B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Landscapes

  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】この出願に係る発明は、舶用大型
ディーゼル機関の給気弁を開閉させる方法とその装置に
関し、更に詳しくは、始動時に給気弁の開閉動作を切換
えることによって容易に始動できるようにした舶用大型
ディーゼル機関の給気弁開閉方法とその装置に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for opening and closing an air supply valve of a large marine diesel engine, and more particularly to a method for easily starting an air supply valve by switching the operation of the air supply valve at startup. The present invention relates to a method and an apparatus for opening and closing an air supply valve of a large marine diesel engine.

【0002】[0002]

【従来の技術と発明が解決しようとする課題】従来よ
り、舶用大型ディーゼル機関の始動時においては、燃料
を着火させて爆発させることによる駆動力を発生させる
までは別の駆動力で回転させる必要がある。その一般的
な方法としては、始動空気リバーサに高圧で蓄えられた
始動空気を機関サイクルの膨張行程でシリンダ内に供給
し、この封じ込められた始動空気を圧縮行程におけるピ
ストン上昇に伴って圧縮して温度上昇させ、この温度上
昇が上死点近傍で着火温度以上になった場合に燃料噴射
して燃料着火させて爆発させるものである。
2. Description of the Related Art Conventionally, when starting a large marine diesel engine, it is necessary to rotate it with another driving force until a driving force is generated by igniting and exploding fuel. There is. As a general method, the starting air stored at a high pressure in the starting air reverser is supplied into a cylinder during an expansion stroke of an engine cycle, and the confined starting air is compressed as the piston rises in a compression stroke. The temperature is raised, and when the temperature rise becomes higher than the ignition temperature near the top dead center, fuel is injected to ignite the fuel and explode.

【0003】この方法によれば、シリンダ内の空気が圧
縮行程で給気弁を閉じた後から排気行程で排気弁が開く
までの間閉じ込められることとなるが、例えば、通常4
サイクルの場合、下死点後20〜60°に給気弁が閉じ
るように給気カムが作られているため、この下死点後2
0〜60°に圧縮を始めて上死点に至るまでに着火温度
に達しない場合はいくら燃料を噴射しても着火しない、
いわゆる「着火失敗」を起こす場合があるからである。
特に、冬期や寒冷地などでディーゼル機関が冷えている
場合にはこのような着火失敗を起こし易い。
According to this method, the air in the cylinder is trapped after the air supply valve is closed in the compression stroke until the exhaust valve is opened in the exhaust stroke.
In the case of a cycle, the air supply cam is made so that the air supply valve closes at 20 to 60 ° after the bottom dead center.
If the ignition temperature is not reached before starting compression to 0-60 ° and reaching the top dead center, no matter how much fuel is injected, no ignition will occur.
This is because a so-called “ignition failure” may occur.
In particular, when the diesel engine is cold in winter or a cold region, such ignition failure is likely to occur.

【0004】そのため、着火し易くするために始動時に
着火温度の低い特別な燃料を用いる場合があるが、この
燃料は高価であるため燃料費が増加してしまう。また、
圧縮行程でシリンダ内の空気温度が着火温度に達しない
場合には、シリンダ壁に逃げる熱を減らすために高い回
転数まで始動空気で回すこともあるが、この場合には、
始動弁の口径を特別大きなものにするとともに始動空気
リバーサも始動弁に合わせて大きなものにする必要があ
るため、高価な始動装置が必要となる。
For this reason, a special fuel having a low ignition temperature may be used at the time of starting in order to make it easy to ignite. However, since this fuel is expensive, the fuel cost increases. Also,
If the air temperature in the cylinder does not reach the ignition temperature during the compression stroke, the engine may be turned with the starting air to a high rotation speed to reduce the heat that escapes to the cylinder wall.
It is necessary to make the diameter of the starting valve extra large and also to make the starting air reverser large in accordance with the starting valve, so that an expensive starting device is required.

【0005】そこで、従来は一般的に始動空気によって
圧縮行程を繰り返す、いわゆるエアランをしたり、始動
前に暖めた潤滑油でシリンダ壁を暖めるターニングをし
て機関を暖める、いわゆる「暖機」を行ってから始動す
る方法が一般的に利用されている。
Therefore, conventionally, a so-called "warm-up" is generally performed in which the compression stroke is repeated by starting air, that is, so-called air-run is performed, or the engine is warmed by turning the cylinder wall with lubricating oil warmed before starting. The method of starting after going is commonly used.

【0006】この「暖機」は、通常の船舶においては、
操作員が経験的に「暖機」完了を判断して燃料を噴射す
るとともに始動空気を停止させて始動する方法が採られ
ている。しかし、この場合には操作員の経験的な判断に
頼っているため、操作員によっては「着火失敗」を頻繁
に起こす場合があり、操作員によっては舶用大型ディー
ゼル機関の始動を行うことが困難となることがある。
[0006] This "warm-up" occurs in a normal ship.
A method has been adopted in which an operator empirically determines the completion of "warm-up", injects fuel, and stops and starts the starting air. However, in this case, depending on the empirical judgment of the operator, "ignition failure" may occur frequently for some operators, and it is difficult for some operators to start large marine diesel engines. It may be.

【0007】また、舶用のディーゼル機関においては、
ほぼ一定出力で長期航行した時に効率が良いように、低
回転数で高出力を得るストロークの長い機関が採用され
た複数気筒の大型ディーゼル機関が搭載されている。そ
のため、このような大型の舶用ディーゼル機関にあって
は始動時間も長くなり、例えば1分程度を必要とする場
合もある。しかも、この始動時には、複数気筒の全てが
同時に着火を開始することは難しく、着火したシリンダ
と着火遅れを生じたシリンダとの間に時間的な着火ずれ
を生じながら順次着火することとなる。したがって、こ
のような場合には、ディーゼルノックを起こしたり、未
着火が続いて機関に悪影響を与えたりする場合がある。
In a marine diesel engine,
A multi-cylinder large-sized diesel engine employing a long-stroke engine that obtains a high output at a low rotational speed is installed so that the efficiency is high when the vehicle sails for a long time at a substantially constant output. Therefore, in such a large marine diesel engine, the starting time is long, and for example, about 1 minute may be required. In addition, at the time of this start, it is difficult for all of the plurality of cylinders to start ignition at the same time, and the cylinders are sequentially fired while causing a temporal ignition shift between the cylinder that fired and the cylinder that caused the ignition delay. Therefore, in such a case, diesel knocking may occur, or unignition may continue to adversely affect the engine.

【0008】一方、圧縮効果を最大にしてシリンダ内の
空気温度を高温にするためには、給気弁のカム形状を下
死点で給気弁が閉じるような形状にすればよいが、この
ように給気弁を下死点で閉じるようにしたまま常用運転
をして機関回転数を上昇させると、相対的に着火遅れが
大きくなり急激な圧力上昇を起こしてディーゼルノック
を生じてしまう。このようなディーゼルノックを起こす
と機関の耐久性に悪影響を及ぼすため、給気弁の閉角度
を下死点にしたままで通常の燃料運転を続けることはで
きなかった。
On the other hand, in order to maximize the compression effect and raise the temperature of the air in the cylinder, the cam of the air supply valve may be shaped so that the air supply valve closes at the bottom dead center. As described above, if the engine speed is increased by performing normal operation with the air supply valve closed at the bottom dead center, the ignition delay becomes relatively large, causing a sudden increase in pressure and diesel knocking. The occurrence of such a diesel knock adversely affects the durability of the engine, so that normal fuel operation cannot be continued with the closing angle of the air supply valve at the bottom dead center.

【0009】そのため、今後の舶用大型ディーゼル機関
では、冬期や寒冷地でも簡単に始動できる機関が求めら
れている。
[0009] Therefore, in the future large marine diesel engines, there is a demand for an engine that can be easily started even in winter or cold regions.

【0010】なお、自動車用のディーゼル機関における
従来技術として、特開平1-315631号公報記載の発明があ
るが、この発明は小型の自動車用ディーゼル機関に関す
るものであるため、エンジンが始動したか否かを判定し
て全気筒の給気弁開閉タイミングを同時に変更する方法
であり、個々のシリンダの状態はみていない。したがっ
て、この発明を舶用大型ディーゼル機関に採用するとし
ても、特定のシリンダが着火、又は未着火の場合には無
視されるので、ディーゼルノックを起こしたり未着火が
続いたりして、上記この出願に係る発明の課題を解決で
きるものではない。
[0010] As a prior art for an automobile diesel engine, there is an invention described in Japanese Patent Application Laid-Open No. 1-315631. However, since the present invention relates to a small automobile diesel engine, it is necessary to determine whether the engine has started. This is a method for simultaneously changing the supply valve opening / closing timing of all cylinders by judging whether or not the state of each cylinder is observed. Therefore, even if the present invention is applied to a large marine diesel engine, if a specific cylinder is ignited or not ignited, it is ignored, and diesel knocking or unigniting continues, and the above-mentioned application is described. It cannot solve the problem of the invention.

【0011】また、他の従来技術として特開昭48-7111
号公報記載の発明や特開平1-159465号公報記載の発明が
あるが、いずれも自動車用ディーゼル機関等の小型ディ
ーゼル機関における始動補助装置であるため、これらも
この出願に係る発明が対象とする舶用の大型ディーゼル
機関における課題を解決することができない。
Another prior art is disclosed in Japanese Patent Application Laid-Open No. 48-7111.
There is an invention described in Japanese Patent Application Laid-Open No. H11-159465 and an invention described in Japanese Patent Application Laid-Open No. 1-159465, but since both are start assist devices in a small diesel engine such as an automobile diesel engine, these are also targeted for the invention according to this application. Problems in large marine diesel engines cannot be solved.

【0012】この出願に係る発明は上記課題に鑑みて、
舶用大型ディーゼル機関において冬期や寒冷地における
始動時でも容易に始動できる舶用大型ディーゼル機関の
給気弁開閉方法を提供することを一つの目的とし、その
給気弁開閉方法を実現できる舶用大型ディーゼル機関の
給気弁装置を提供することを他の目的とする。
In view of the above problems, the invention according to this application has
One object of the present invention is to provide a method for opening and closing a supply valve of a large marine diesel engine that can be easily started even in a winter or a cold region in a large marine diesel engine. Another object of the present invention is to provide an air supply valve device.

【0013】[0013]

【課題を解決するための手段】上記目的を達成するため
に、請求項1に係る舶用大型ディーゼル機関の給気弁制
御方法は、4サイクルのロングストローク機関を採用し
た複数気筒の舶用大型ディーゼル機関において、前記複
数気筒の各シリンダごとに、給気弁の閉弁角度を下死点
近傍まで早くした始動用開閉タイミングと、給気弁の閉
弁角度を常用角度にした常用開閉タイミングを設定し、
始動時には各シリンダごとに給気弁の閉弁角度を早めた
始動用開閉タイミングで給気弁を開閉し、該各シリンダ
ごとの着火判定信号により着火判定すると、着火した各
シリンダごとに前記始動用開閉タイミングから常用開閉
タイミングに切換えて給気弁を開閉し、順次着火した各
シリンダごとに始動用開閉タイミングから常用開閉タイ
ミングに切換えて給気弁を開閉することを特徴とするも
のである。
In order to achieve the above object, a method for controlling a supply valve of a large marine diesel engine according to claim 1 employs a four-stroke long stroke engine.
In a large marine diesel engine with multiple cylinders,
For each cylinder of several cylinders, set the closing angle of the air supply valve to the bottom dead center.
Start opening / closing timing that has been advanced to the vicinity and closing of the air supply valve
Set the regular opening / closing timing with the valve angle set to the regular angle,
At start-up, the air supply valve is opened and closed at a start opening / closing timing in which the closing angle of the air supply valve is advanced for each cylinder, and if ignition is determined by an ignition determination signal for each cylinder, the above-described starting operation is performed for each cylinder that has fired. switching on the normal closing timing from the switching timing to open and close the air supply valve, and is characterized in that for opening and closing the air supply valve is switched to the conventional opening and closing timing from the start-off timing for each cylinder sequentially ignited.

【0014】請求項2に係る舶用大型ディーゼル機関の
給気弁装置は、4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、
動時に給気弁の閉弁角度を早めた始動用開閉タイミング
を出力する始動用ピックアップセンサ各シリンダごと
に設けるとともに、常用時に給気弁の常用開閉タイミン
グを出力する常用ピックアップセンサ各シリンダごと
に設け、各シリンダで着火したことを判定して着火判定
信号を出力する着火判定器各シリンダごとに設け、
記始動用ピックアップセンサからの始動用開閉タイミン
グと前記常用ピックアップセンサからの常用開閉タイミ
ングを入力し、前記着火判定器の着火判定信号によって
該始動用開閉タイミングから常用開閉タイミングに切換
えて出力する信号切換器各シリンダごとに設けて該信
号切換器からの給気弁開閉タイミングにより給気弁
閉するように構成したことを特徴とするものである。
According to a second aspect of the present invention, there is provided an air supply valve device for a large marine diesel engine which employs a four-stroke long stroke engine.
In marine large diesel engine plurality of cylinders that use, the startup pickup sensor you output the starting-off timing of early closing angle of the air supply valve when starting each cylinder
It is provided on the normal pickup sensor you output common opening and closing timing of the intake valve during regular each cylinder
In providing, to wear fire determiner you outputs ignition determination signal by determining that ignited in each cylinder provided for each cylinder, conventional from the conventional pickup sensor and the starting-off timing from the starting pickup sensor An open / close timing is input, and a signal switch is provided for each cylinder and switched from the open / close timing for starting to the normal open / close timing according to an ignition determination signal of the ignition determiner, and an air supply valve opening / closing timing from the signal switch is provided for each cylinder. is characterized in that constitute Rikyu valves to open <br/> closes so by the.

【0015】請求項3に係る舶用大型ディーゼル機関の
給気弁制御方法は、4サイクルのロングストローク機関
を採用した複数気筒の舶用大型ディーゼル機関におい
て、ピックアップセンサによりクランク角度信号を検出
し、該クランク角度信号に基づいて、前記複数気筒の各
シリンダごとに、給気弁の閉弁角度を下死点近傍まで早
くした始動用開閉タイミングと、給気弁の閉弁角度を常
用角度にした常用開閉タイミングを生成し、始動時には
各シリンダごとに前記始動用開閉タイミングを出力し、
該各シリンダごとの着火判定信号により着火判定する
と、着火した各シリンダごとに前記始動用開閉タイミン
グから常用開閉タイミングに切換えて給気弁を開閉し、
順次着火した各シリンダごとに始動用開閉タイミングか
ら常用開閉タイミングに切換えて給気弁を開閉すること
を特徴とするものである。
According to a third aspect of the present invention, there is provided a method for controlling a supply valve of a large marine diesel engine, comprising: a four-stroke long stroke engine.
For multi-cylinder large marine diesel engine with
A crank angle signal is detected by a pickup sensor, and each of the plurality of cylinders is detected based on the crank angle signal.
For each cylinder, quickly close the intake valve close angle to near the bottom dead center.
The open / close timing for starting and the closing angle of the air supply valve
Generate a normal opening / closing timing at the required angle, output the starting opening / closing timing for each cylinder at the time of starting,
When the ignition is determined by the ignition determination signal for each cylinder, the air supply valve is opened and closed by switching from the opening / closing timing for start to the normal opening / closing timing for each ignited cylinder,
The present invention is characterized in that the supply valve is opened and closed by switching from the opening / closing timing for starting to the regular opening / closing timing for each cylinder that has been sequentially ignited.

【0016】請求項4に係る舶用大型ディーゼル機関の
給気弁装置は、4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、
ランク角度を一定角度間隔で信号として出力するピック
アップセンサを設け、該ピックアップセンサからの信号
により給気弁の閉弁角度を下死点近傍まで早めた始動用
開閉タイミングを生成して出力する始動用タイミング生
成器各シリンダごとに設けるとともに、前記ピックア
ップセンサからの信号により給気弁の閉弁角度を常用角
度にした常用開閉タイミングを生成して出力する常用タ
イミング生成器各シリンダごとに設け、各シリンダで
着火したことを判定して着火判定信号を出力する着火判
定器各シリンダごとに設け、前記始動用タイミング生
成器からの始動用開閉タイミングと前記常用タイミング
生成器からの常用開閉タイミングを入力し、前記着火判
定器の着火判定信号によって該始動用開閉タイミングか
ら常用開閉タイミングに切換えて出力する信号切換器
各シリンダごとに設けて該信号切換器からの給気弁開閉
タイミングにより給気弁開閉するように構成したこと
を特徴とするものである。
According to a fourth aspect of the present invention, there is provided an air supply valve device for a large marine diesel engine which employs a four-stroke long stroke engine.
In a large marine diesel engine with multiple cylinders used, a pickup sensor that outputs a crank angle as a signal at fixed angular intervals is provided , and the closing angle of the air supply valve is advanced to near the bottom dead center by a signal from the pickup sensor. A start timing generator for generating and outputting the open / close timing for each cylinder is provided for each cylinder, and the closing angle of the air supply valve is set to a normal angle by a signal from the pickup sensor.
Generates a common closing timing every time by providing a common timing generator for outputting for each cylinder, provided with ignition determination unit for outputting an ignition judgment signal is determined to be ignited in the cylinder for each cylinder, wherein A signal for inputting a start opening / closing timing from a start timing generator and a regular opening / closing timing from the regular timing generator, and switching from the opening / closing timing to the regular opening / closing timing according to an ignition determination signal of the ignition determiner, and outputting the signal. it is characterized in that to constitute a switching unit <br/> to open and close by Rikyu valves in air supply valve opening and closing timing from the signal switching device is provided for each cylinder.

【0017】請求項5に係る舶用大型ディーゼル機関の
給気弁制御方法は、4サイクルのロングストローク機関
を採用した複数気筒の舶用大型ディーゼル機関におい
て、始動時には各シリンダごとに閉弁角度を給気弁の閉
弁角度を下死点近傍まで早めた始動用カムに切換え、該
各シリンダごとの着火判定信号により着火判定すると、
着火した各シリンダごとに前記始動用カムから給気弁の
閉弁角度を常用角度にした常用カムに切換えて給気弁を
開閉し、順次着火したシリンダごとに始動用カムから常
用カムに切換えて給気弁を開閉することを特徴とするも
のである。
According to a fifth aspect of the present invention, there is provided a method for controlling a supply valve of a large marine diesel engine, comprising: a four-stroke long stroke engine;
For multi-cylinder large marine diesel engine with
Te, during start closing the intake valve closing angle for each cylinder
When the valve angle is switched to the starting cam that has been advanced to near the bottom dead center and ignition is determined by the ignition determination signal for each cylinder,
From the starting cam for each cylinder ignition of the air supply valve
By switching to conventional cam and the closing angle common angle by opening and closing the air supply valve, and is characterized in that for opening and closing sequentially ignited air supply valve is switched to the regular cam from the starting cam for each cylinder.

【0018】請求項6に係る舶用大型ディーゼル機関の
給気弁装置は、4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、
動時に給気弁の閉弁角度を下死点近傍まで早めた始動用
開閉動作を作る始動用カム各シリンダごとに設けると
ともに、常用時に給気弁の閉弁角度を常用角度にした
用開閉動作を作り出す常用カム各シリンダごとに設
け、各シリンダで着火したことを判定して着火判定信号
を出力する着火判定器各シリンダごとに設け、該着火
判定器の着火判定信号によって前記始動用カムから常用
カムに切換えるカム切換器各シリンダごとに設けて
カム切換器で切換える始動用又は常用カムにより給気弁
開閉するように構成したことを特徴とするものであ
る。
According to a sixth aspect of the present invention, there is provided an air supply valve device for a large marine diesel engine employing a four-stroke long stroke engine.
In a large-sized multi-cylinder marine diesel engine, a starting cam is provided for each cylinder that starts and closes the intake valve at the time of start up to near the bottom dead center.
In each case, a regular cam is provided for each cylinder to create a regular opening and closing operation with the closing angle of the air supply valve at the regular angle during regular use.
Only, the ignition determination unit for outputting an ignition judgment signal is determined to be ignited in the cylinder provided for each cylinder, a cam switching device for switching on the normal cam from the starting cam by ignition determination signal該着fire determiner by the starting or customary cam switches in the cam switching device is provided for each cylinder Rikyu valves
It is characterized in that it has configured to open and close the.

【0019】[0019]

【作用】請求項1に係る舶用大型ディーゼル機関の給気
弁制御方法によれば、始動時には複数気筒の各シリンダ
ごとに給気弁の閉弁角度を下死点近傍まで早めた始動用
開閉タイミングにより給気弁が開閉され、各シリンダご
との着火判定信号により着火判定されると着火した各シ
リンダごとに前記給気弁の閉弁角度が始動用開閉タイミ
ングから閉弁角度を常用角度にした常用開閉タイミング
に切換えられ、その後、順次着火した各シリンダごとに
始動用開閉タイミングから常用開閉タイミングに切換え
られて給気弁を開閉するため、始動時は給気弁を閉じる
角度を下死点近傍まで早くするのでシリンダ内空気の圧
縮始めが早くなり、上死点での圧縮温度が高くなって燃
料が着火し易くなる。
According to the air supply valve control method for a large marine diesel engine according to the first aspect, at the time of starting, the opening and closing timing of the air supply valve is advanced for each cylinder of a plurality of cylinders to near the bottom dead center. When the ignition valve is opened and closed by the ignition determination signal for each cylinder, the closing angle of the air supply valve is set to the normal angle from the start opening / closing timing for each ignited cylinder. It is switched to opening / closing timing, and thereafter, for each cylinder that has been ignited, it is switched from starting opening / closing timing to regular opening / closing timing to open and close the air supply valve. Since the compression is earlier, the compression of the air in the cylinder is started earlier, the compression temperature at the top dead center becomes higher, and the fuel becomes easier to ignite.

【0020】しかも、各シリンダごとに着火を判定して
いるため、シリンダごとのばらつきによる未着火のシリ
ンダと着火のシリンダがあった場合でも、未着火のシリ
ンダは給気弁の閉じる角度を早くして着火を促し、着火
したシリンダは給気弁の閉じる角度を遅らせてディーゼ
ルノックを防止することができる。
In addition, since ignition is determined for each cylinder, even if there is an unignited cylinder and an ignited cylinder due to variations among the cylinders, the unignited cylinder increases the closing angle of the air supply valve. The cylinder that ignites can delay the closing angle of the air supply valve to prevent diesel knock.

【0021】また、請求項2に係る舶用大型ディーゼル
機関の給気弁装置によれば、上記請求項1の給気弁制御
方法において、各シリンダごとに設けた始動用ピックア
ップセンサにより始動用開閉タイミングを出力し、各シ
リンダごとに設けた着火判定器による着火判定信号によ
って着火判定し、各シリンダごとに設けた信号切換器に
よって、着火したシリンダごとに前記始動用ピックアッ
プセンサによる始動用開閉タイミングから常用ピックア
ップセンサによる常用開閉タイミングに切換えられ、そ
の後、順次着火した各シリンダごとに信号切換器で始動
用開閉タイミングから常用開閉タイミングに切換えて給
気弁を開閉するため、始動時は給気弁を閉じる角度を下
死点近傍まで早くするのでシリンダ内空気の圧縮始めが
早くなり、上死点での圧縮温度が高くなって燃料を着火
し易くできる。
According to the air supply valve device for a large marine diesel engine according to the second aspect, in the air supply valve control method according to the first aspect, the start-up opening / closing timing is provided by a start-up pickup sensor provided for each cylinder. Is output, and ignition is determined by an ignition determination signal provided by an ignition determination device provided for each cylinder. It is switched to the normal opening / closing timing by the pickup sensor, and then the air supply valve is opened and closed by switching from the starting opening / closing timing to the normal opening / closing timing by the signal switch for each cylinder that has ignited sequentially. Since the angle is advanced to near the bottom dead center, the compression of air in the cylinder starts earlier, and the top dead center It can easily ignite the fuel is high temperature compression.

【0022】請求項3に係る舶用大型ディーゼル機関の
給気弁制御方法によれば、検出したクランク角度信号に
より、始動時には複数気筒の各シリンダごとに生成した
給気弁の閉弁角度を下死点近傍まで早めた始動用開閉タ
イミングによって給気弁を開閉し、各シリンダごとの着
火判定信号により着火判定されると着火した各シリンダ
ごとに前記給気弁の閉弁角度が始動用開閉タイミングか
閉弁角度を常用角度にした常用開閉タイミングに切換
えられ、その後、順次着火した各シリンダごとに始動用
開閉タイミングから常用開閉タイミングに切換えられて
給気弁を開閉するため、始動時は給気弁を閉じる角度を
下死点近傍まで早くするのでシリンダ内空気の圧縮始め
が早くなり、上死点での圧縮温度が高くなって燃料を着
火し易くできる。しかも、上記請求項1と同様にディー
ゼルノックを防止することができる。
[0022] wherein, according to the intake valve control method for marine large diesel engine according to claim 3, the detected crank angle signal, the bottom dead closing angle of the air supply valve which is generated for each cylinder of the plurality of cylinders during start-up The intake valve is opened and closed by the start opening / closing timing advanced to near the point , and when the ignition is determined by the ignition determination signal for each cylinder, the closing angle of the supply valve for each ignited cylinder is changed from the start opening / closing timing for each ignited cylinder. The opening / closing timing is switched to the normal closing angle with the valve closing angle set to the normal angle, and then the opening / closing timing for starting is switched from the opening / closing timing for normal use to the normal opening / closing timing for each fired cylinder. The closing angle is advanced to near the bottom dead center, so that the compression of the air in the cylinder is started earlier, the compression temperature at the top dead center is increased, and the fuel can be easily ignited. Moreover, diesel knock can be prevented as in the case of the first aspect.

【0023】また、請求項4に係る舶用大型ディーゼル
機関の給気弁装置によれば、上記請求項1の給気弁制御
方法において、各シリンダごとに設けた始動用タイミン
グ生成器により始動用開閉タイミングを生成するととも
に、常用タイミング生成器により常用開閉タイミングを
生成し、各シリンダごとに設けた着火判定器による着火
判定信号によって着火判定し、各シリンダごとに設けた
信号切換器によって、着火したシリンダごとに前記始動
用タイミング生成器による始動用開閉タイミングから常
用タイミング生成器による常用開閉タイミングに切換え
られ、その後、順次着火した各シリンダごとに信号切換
器で始動用開閉タイミングから常用開閉タイミングに切
換えて給気弁を開閉するため、始動時は給気弁を閉じる
角度を下死点近傍まで早くするのでシリンダ内空気の圧
縮始めが早くなり、上死点での圧縮温度が高くなって燃
料を着火し易くできる。しかも、上記請求項2と同様に
ディーゼルノックを防止することができる。
According to the air supply valve device for a large marine diesel engine according to a fourth aspect, in the air supply valve control method according to the first aspect, the starting timing generator provided for each cylinder opens and closes the starting valve. In addition to generating the timing, the regular opening / closing timing is generated by the regular timing generator, the ignition is determined by the ignition determination signal provided by the ignition determiner provided for each cylinder, and the cylinders ignited by the signal switch provided for each cylinder. Is switched from the opening / closing timing for starting by the starting timing generator to the regular opening / closing timing by the regular timing generator, and thereafter, the starting / closing timing is switched from the starting / closing timing to the regular opening / closing timing by the signal switch for each cylinder sequentially fired. To start and close the air supply valve, close the air supply valve at startup near the bottom dead center. In so fast compression start of air in the cylinder is faster, it can easily ignite the fuel becomes higher compression temperature at the top dead center. In addition, diesel knock can be prevented as in the case of the second aspect.

【0024】請求項5に係る舶用大型ディーゼル機関の
給気弁制御方法によれば、始動時には複数気筒の各シリ
ンダごとにカム切換器で閉弁角度を下死点近傍まで早め
た始動用カムに切換えて給気弁を開閉し、各シリンダご
との着火判定信号により着火判定されると着火した各シ
リンダごとに前記始動用カムから給気弁の閉弁角度を常
用角度にした常用カムに切換えられ、その後、順次着火
した各シリンダごとに始動用カムから常用カムに切換え
られて給気弁を開閉するため、始動時は給気弁を閉じる
角度を下死点近傍まで早くするのでシリンダ内空気の圧
縮始めが早くなり、上死点での圧縮温度が高くなって燃
料を着火し易くできる。しかも、上記請求項1と同様に
ディーゼルノックを防止することができる。
According to the air supply valve control method for a large marine diesel engine according to the fifth aspect, at the time of starting, the starting cam whose valve closing angle is advanced to near the bottom dead center by a cam switch for each cylinder of a plurality of cylinders is provided. When the ignition is determined by the ignition determination signal for each cylinder, the closing angle of the air supply valve is always set from the starting cam for each cylinder that has ignited.
The starting cam is switched to the working cam at the working angle, and then the cylinder is switched from the starting cam to the working cam for each fired cylinder to open and close the air supply valve. Since the compression speed is increased to the vicinity, the compression start of the air in the cylinder is accelerated, and the compression temperature at the top dead center is increased, so that the fuel can be easily ignited. Moreover, diesel knock can be prevented as in the case of the first aspect.

【0025】また、請求項6に係る舶用大型ディーゼル
機関の給気弁装置によれば、上記請求項5の給気弁制御
方法において、各シリンダごとに設けた着火判定器によ
る着火判定信号によって着火判定し、各シリンダごとに
設けたカム切換器により着火した各シリンダごとに閉弁
角度を早めた始動用カムから常用カムに切換えて給気弁
を開閉し、その後、順次着火した各シリンダごとにカム
切換器で始動用カムから常用カムに切換えて給気弁を開
閉するため、始動時は給気弁を閉じる角度を下死点近傍
まで早くするのでシリンダ内空気の圧縮始めが早くな
り、上死点での圧縮温度が高くなって燃料を着火し易く
できる。しかも、上記請求項4と同様にディーゼルノッ
クを防止することができる。
According to the air supply valve device for a large marine diesel engine according to the sixth aspect, in the air supply valve control method according to the fifth aspect, ignition is performed by an ignition determination signal provided by an ignition determiner provided for each cylinder. Judgment, the cam switch provided for each cylinder ignited, the valve closing angle of each cylinder ignited was switched from the starting cam with the advanced valve to the service cam to open and close the air supply valve, and then for each cylinder ignited sequentially Since the cam switch switches the starting cam from the regular cam to the regular cam to open and close the air supply valve, the angle of closing the air supply valve is shortened to near the bottom dead center at startup, so the compression of air in the cylinder starts earlier, The compression temperature at the dead center is increased, and the fuel can be easily ignited. In addition, diesel knock can be prevented as in the case of the fourth aspect.

【0026】[0026]

【実施例】以下、この出願に係る発明の一実施例を図面
に基づいて説明する。図1は第1実施例を示すブロック
図であり、図示するように、始動用ピックアップセンサ
1と常用ピックアップセンサ2とが信号切換器3に接続
されており、この信号切換器3には着火判定器4からの
信号が入力され、この信号切換器3からの信号により、
この実施例では電磁弁5を駆動して給気弁6を開閉させ
ように構成されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the invention according to the present application will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment. As shown in FIG. 1, a starting pickup sensor 1 and a regular pickup sensor 2 are connected to a signal switch 3, and the signal switch 3 determines ignition. The signal from the signal switch 4 is input, and the signal from the signal switch 3
In this embodiment, the electromagnetic valve 5 is driven to open and close the air supply valve 6.

【0027】上記始動用ピックアップセンサ1及び常用
ピックアップセンサ2は、例えば機関に連結したカム軸
等の回転軸に設けられ、以下の〔表1〕に示すように、
給気弁6が開く角度でON信号、閉まる角度でOFF信
号が出力されるようになったセンサが用いられる。この
センサとしては、例えば、回転軸側に回転板を設けると
ともに固定側に近接スイッチを設け、この回転板に給気
弁6が開く所定角度から閉じる所定角度までの検出部を
設け、この検出部を近接スイッチで検出した時にON信
号、切れた時にOFF信号を出力するように構成すれば
よい。なお、この実施例では始動用と常用の2種類の検
出部を各シリンダごとに設けることとなる。
The starting pickup sensor 1 and the regular pickup sensor 2 are provided on a rotating shaft such as a cam shaft connected to an engine, for example, as shown in Table 1 below.
A sensor that outputs an ON signal when the air supply valve 6 opens and an OFF signal when the air supply valve 6 closes is used. As this sensor, for example, a rotating plate is provided on the rotating shaft side and a proximity switch is provided on the fixed side, and a detecting unit is provided on the rotating plate from a predetermined angle at which the air supply valve 6 opens to a predetermined angle at which the air supply valve 6 closes. May be configured to output an ON signal when is detected by the proximity switch and an OFF signal when the signal is cut off. In this embodiment, two types of detectors, one for starting and the other for normal use, are provided for each cylinder.

【0028】また、これらのピックアップセンサ1,2
の給気弁開角度と給気弁閉角度は、以下の〔表2〕に示
すように設定されている。なお、TDCは上死点前角
度,BDCは下死点後角度を表す。
The pickup sensors 1, 2
The air supply valve opening angle and air supply valve closing angle are set as shown in [Table 2] below. Note that TDC represents the angle before top dead center, and BDC represents the angle after bottom dead center.

【0029】[0029]

【表1】 [Table 1]

【0030】[0030]

【表2】 [Table 2]

【0031】この時、一般にシリンダ内の空気の温度上
昇をポリトロープ変化で考えると次の〔数1〕のように
表せる。
At this time, when the temperature rise of the air in the cylinder is generally considered by a polytrope change, it can be expressed as the following [Equation 1].

【0032】[0032]

【数1】 (Equation 1)

【0033】ここで、T2は上死点でのシリンダ内の空
気温度、T1は給気弁が閉になりシリンダを締め切った
時点のシリンダ内の空気温度、V2は上死点での隙間容
積、V1は給気弁が閉になりシリンダを締め切った時点
でのシリンダ容積、nはポリトロープ指数である。この
式からもわかるようにV1とV2の比率が大きいと上死
点でのシリンダ内の空気温度は大きく上昇する。
Here, T2 is the air temperature in the cylinder at the top dead center, T1 is the air temperature in the cylinder when the air supply valve is closed and the cylinder is closed, V2 is the gap volume at the top dead center, V1 is the cylinder volume when the air supply valve is closed and the cylinder is closed, and n is the polytropic index. As can be seen from this equation, when the ratio between V1 and V2 is large, the air temperature in the cylinder at the top dead center increases significantly.

【0034】一方、上記着火判定器4は、シリンダ内で
燃料が着火したことを判定する機能を持っており、この
実施例ではその着火判定の一例として、図2の線図に示
すように各シリンダごとの回転数変化率で着火判定をし
ている。すなわち、この例では3シリンダのディーゼル
機関を例にし、各シリンダごとに設けた回転数検出器7
により各シリンダごとの回転数を検出してその変化率を
読み取ることにより着火判定をしており、例えば、第1
シリンダの回転数を検出することにより第1シリンダ
の変化率(a) を読み取り、この例では所定値以上である
ので着火判定をして給気弁を常用開閉タイミングに切換
える。また、第2シリンダの回転数を検出することに
より同じく第2シリンダの変化率(b) を読み取り、第2
シリンダも所定値以上であるので着火判定をして給気弁
を常用開閉タイミングに切換える。そして、第3シリン
ダの回転数を検出することにより第3シリンダの変化
率(c) を検出するが、この例では変化率(c) が所定値以
下であるので未着火と判定して次回も始動用開閉タイミ
ングによって給気弁6を開閉する。そして、次の第3シ
リンダの回転数を検出することにより第3シリンダの
変化率(f) を読み取ると、変化率が所定値以上であるた
め第3シリンダの着火判定をして給気弁を常用開閉タイ
ミングに切換えるように制御する。
On the other hand, the ignition judging device 4 has a function of judging that the fuel has ignited in the cylinder. In this embodiment, as an example of the ignition judging, as shown in the diagram of FIG. Ignition is determined based on the rate of change in the number of revolutions for each cylinder. That is, in this example, a three-cylinder diesel engine is taken as an example, and a rotation speed detector 7 provided for each cylinder is provided.
The ignition determination is made by detecting the rotation speed of each cylinder and reading the rate of change of the rotation speed.
The rate of change (a) of the first cylinder is read by detecting the number of rotations of the cylinder. In this example, since the change rate is equal to or more than the predetermined value, the ignition is determined and the air supply valve is switched to the normal open / close timing. Similarly, by detecting the rotation speed of the second cylinder, the rate of change (b) of the second cylinder is read, and
Since the value of the cylinder is also equal to or more than the predetermined value, the ignition is determined and the air supply valve is switched to the normal opening / closing timing. Then, the rate of change (c) of the third cylinder is detected by detecting the number of revolutions of the third cylinder. In this example, the rate of change (c) is equal to or less than a predetermined value. The air supply valve 6 is opened and closed according to the start opening and closing timing. Then, when the rate of change (f) of the third cylinder is read by detecting the rotation speed of the third cylinder, the ignition rate of the third cylinder is determined because the rate of change is greater than or equal to a predetermined value, and the air supply valve is opened. Control is performed so as to switch to the normal opening / closing timing.

【0035】この着火判定は、回転数の変化率とシリン
ダごとの前回の燃料噴射後の回転数の変化率とを比較し
て、変化率が所定値以上上昇しているときは着火、上昇
していない時は未着火と判定している。したがって、始
動空気だけの回転数の変化率から機関が着火して回転数
の変化率が高くなると着火したものと判定することとな
る。この着火判定器4は燃料が着火して機関が回転して
いる間、着火判定信号を出力している。なお、各シリン
ダごとの着火判定とともに機関全体における着火判定を
行う場合、図3(a) の回転数で検出する線図に示すよう
に、始動空気による回転から、所定回転数で燃料投入
し、着火して着火判定の所定回転数以上の回転数へ急
激に上昇する現象を読み取って着火判定したり、ま
た、図3(b) の加速度で検出する線図に示すように、始
動空気による回転から、所定回転数で燃料投入し、
着火して着火判定の所定加速度以上の加速度へ急激に上
昇する現象(g) を読み取って着火判定したり、これら両
方で着火判定することもできる。
The ignition determination is performed by comparing the rate of change of the number of revolutions with the rate of change of the number of revolutions after the previous fuel injection for each cylinder. If not, it is determined that no ignition has occurred. Therefore, when the engine is ignited and the rate of change in the number of revolutions increases from the rate of change in the number of revolutions of the starting air alone, it is determined that the engine has fired. The ignition determiner 4 outputs an ignition determination signal while the fuel is ignited and the engine is rotating. When performing the ignition determination for the entire engine together with the ignition determination for each cylinder, as shown in the diagram of FIG. The ignition is determined by reading the phenomenon of rapid rise to a rotation speed equal to or higher than the predetermined rotation speed of the ignition determination, or the rotation by the starting air is detected as shown in the acceleration detection diagram in FIG. 3 (b). From, fuel at a predetermined speed,
It is also possible to read the phenomenon (g) that rapidly rises to an acceleration equal to or higher than the predetermined acceleration for ignition determination to make an ignition determination, or to make an ignition determination based on both of them.

【0036】また、上述した信号切換器3は、上記着火
判定器4からの着火判定信号によってピックアップセン
サ1,2を選択的に切換えるものであり、着火判定信号
がOFFの場合は始動用ピックアップセンサ1からの信
号を出力し、着火判定信号がONの場合には常用ピック
アップセンサ2からの信号を出力して給気弁6を開閉さ
せる電磁弁5の開閉タイミングを制御するものである。
The signal switching unit 3 selectively switches the pickup sensors 1 and 2 according to the ignition determination signal from the ignition determination unit 4. When the ignition determination signal is OFF, the starting pickup sensor is used. 1 is output, and when the ignition determination signal is ON, a signal is output from the service pickup sensor 2 to control the opening / closing timing of the electromagnetic valve 5 for opening / closing the air supply valve 6.

【0037】上記給気弁6は、信号切換器3から出力さ
れる開閉タイミング信号によって開閉動作されるもので
あり、この実施例では、給気弁6に連動する図示しない
油圧シリンダを駆動制御する電磁弁5との組合せによっ
て構成されている。すなわち、信号切換器3からの開閉
タイミング信号で給気弁6を開にする間は電磁弁5を励
磁し、閉にする間は電磁弁5を非励磁にするような図示
しない油圧回路によって接続されている。なお、上記電
磁弁5に代えてサーボ弁を使用してもよいし、油圧回路
に代えて空圧回路で構成してもよい。
The air supply valve 6 is opened and closed by an open / close timing signal output from the signal switch 3. In this embodiment, a hydraulic cylinder (not shown) linked to the air supply valve 6 is driven and controlled. It is configured by a combination with the solenoid valve 5. That is, the solenoid valve 5 is energized while the air supply valve 6 is opened by the opening / closing timing signal from the signal switch 3, and is deenergized while the air supply valve 6 is closed. Have been. Note that a servo valve may be used instead of the electromagnetic valve 5, or a pneumatic circuit may be used instead of the hydraulic circuit.

【0038】このように構成された第1実施例の給気弁
制御装置によれば、以下のように作用して舶用大型ディ
ーゼル機関の始動を行うことができる。
According to the air supply valve control device of the first embodiment configured as described above, the large-sized marine diesel engine can be started by the following operation.

【0039】すなわち、始動時には、図4(a),(b) に示
す給気弁の動作説明図のように、各シリンダごとに設け
られた始動用ピックアップセンサ1からの信号に基づい
て信号切換器3から電磁弁5に信号が送られて、この信
号に従って給気弁6が始動用開閉タイミングt1 によっ
て開閉させられる。そして、各シリンダごとに設けられ
た着火判定器4によって着火判定Fがなされると、その
シリンダの信号切換器3に着火判定の信号が入力されて
上記始動用ピックアップセンサ1から常用ピックアップ
センサ2へ切換えられるため、この信号切換器3から電
磁弁5に信号が送られて給気弁6が常用開閉タイミング
2 によって開閉させられる。なお、oが開時でcが閉
時である。
That is, at the time of starting, as shown in the operation explanatory diagram of the air supply valve shown in FIGS. 4A and 4B, the signal is switched based on the signal from the starting pickup sensor 1 provided for each cylinder. from vessel 3 a signal is sent to the solenoid valve 5, the air supply valve 6 is opened and closed by a starter valve timing t 1 in accordance with this signal. When an ignition determination F is made by an ignition determiner 4 provided for each cylinder, an ignition determination signal is input to a signal switch 3 of the cylinder, and the ignition pickup sensor 1 is sent from the starting pickup sensor 1 to the regular pickup sensor 2. since the switches, intake valves 6 are opened and closed by a conventional closing timing t 2 from the signal switching device 3 is sent a signal to the solenoid valve 5. Note that o is open and c is closed.

【0040】次に、第2実施例を図2に示すブロック図
に基づいて説明する。この第2実施例は、上述した第1
実施例における始動用ピックアップセンサ1と常用ピッ
クアップセンサ2とに代えて、共通のピックアップセン
サ8からの信号を始動用タイミング生成器9で始動用開
閉タイミング、常用タイミング生成器10で常用開閉タ
イミングとして生成して信号切換器3に出力する実施例
である。なお、上述した第1実施例と同一の構成には同
一符号を付して説明する。
Next, a second embodiment will be described with reference to the block diagram shown in FIG. This second embodiment is similar to the first embodiment described above.
In place of the starting pickup sensor 1 and the regular pickup sensor 2 in the embodiment, a signal from the common pickup sensor 8 is generated as a starting and closing timing by the starting timing generator 9 and a regular opening and closing timing by the regular timing generator 10. This is an embodiment in which the signal is output to the signal switch 3. The same components as those in the first embodiment will be described with the same reference numerals.

【0041】図示するように、ピックアップセンサ8は
各シリンダごとに設けられた始動用タイミング生成器9
と常用タイミング生成器10とに接続されており、この
始動用タイミング生成器9と常用タイミング生成器10
とは各シリンダごとに設けられた信号切換器3に接続さ
れている。そして、この信号切換器3には上述した着火
判定器4からの信号が入力されており、この第2実施例
でも上述した第1実施例と同様にこの信号切換器3から
の信号によって電磁弁5を駆動して給気弁6を開閉させ
るように構成されている。
As shown, a pickup sensor 8 is provided with a start timing generator 9 provided for each cylinder.
The starting timing generator 9 and the regular timing generator 10 are connected to the
Are connected to a signal switch 3 provided for each cylinder. The signal from the ignition determiner 4 is input to the signal switch 3, and in the second embodiment, as in the first embodiment, the signal from the signal switch 3 is used to control the electromagnetic valve. 5 is driven to open and close the air supply valve 6.

【0042】この第2実施例のピックアップセンサ8
は、上述した第1実施例と同様に機関のカム軸等に連結
して設けられているが、基準角度と一定角度間隔でパル
ス信号を出力するものであればよく、例えば、回転エン
コーダでもよい。
The pickup sensor 8 of the second embodiment
Is connected to a camshaft or the like of the engine in the same manner as in the first embodiment described above, but may be any as long as it outputs a pulse signal at a constant angle interval from the reference angle, and may be, for example, a rotary encoder. .

【0043】上記始動用タイミング生成器9は、基準角
度から一定角度間隔でいくらパルス信号を入力すれば給
気弁6を開動作、いくらパルス信号を入力すれば給気弁
6を閉動作にするかを予め登録しておき、ピックアップ
センサ8からの信号が入力されると開動作から閉動作ま
での間で始動用の給気弁開閉信号を出力するものであ
る。また、常用タイミング生成器10も始動用タイミン
グ生成器9と同様の構成であり、常用の給気弁開閉信号
として上記始動用タイミング生成器9よりも給気弁6を
閉動作をさせるまでのパルス数が多い点で異なるが、開
動作から閉動作までの間で常用の給気弁開閉信号を出力
するものである。
The start timing generator 9 opens the air supply valve 6 when a pulse signal is input at a constant angle interval from the reference angle, and closes the air supply valve 6 when a pulse signal is input. This is registered in advance, and when a signal from the pickup sensor 8 is input, a start air supply valve opening / closing signal is output from the opening operation to the closing operation. The service timing generator 10 also has the same configuration as the start timing generator 9, and a pulse until the air supply valve 6 is closed by the start timing generator 9 as a service air valve opening / closing signal. Although it differs in that the number is large, it outputs a normal air supply valve opening / closing signal from the opening operation to the closing operation.

【0044】着火判定器4は上記第1実施例と同じく、
シリンダ内での燃料の着火状態を判定して信号切換器3
に着火判定信号を出力するものであり、信号切換器3で
は、この着火判定信号がONの場合には給気弁6に常用
開閉タイミング信号を、着火判定信号がOFFの場合は
給気弁6に始動時開閉タイミング信号を出力する。な
お、給気弁6は上述した第1実施例と同様に信号切換器
3から出力される開閉タイミング信号に従って開閉動作
をする。
The ignition judging device 4 is the same as in the first embodiment.
The signal switch 3 determines the ignition state of the fuel in the cylinder and determines
The signal switching unit 3 outputs a normal open / close timing signal to the air supply valve 6 when the ignition determination signal is ON, and outputs a signal to the air supply valve 6 when the ignition determination signal is OFF. The start-up opening / closing timing signal is output to the controller. The air supply valve 6 opens and closes in accordance with the open / close timing signal output from the signal switch 3 as in the first embodiment described above.

【0045】このように構成された第2実施例の給気弁
制御装置によれば、以下のように作用して舶用大型ディ
ーゼル機関の始動を行うことができる。
According to the air supply valve control device of the second embodiment configured as described above, the large-sized marine diesel engine can be started by the following operation.

【0046】すなわち、始動時には、信号切換器3によ
って始動用タイミング生成器9からの信号が選択され、
この信号に基づいて電磁弁5が給気弁6を始動用の開閉
タイミングによって開閉させる。そして、各シリンダご
とに設けられた着火判定器4によって着火したと判定さ
れると、そのシリンダの信号切換器3に着火判定の信号
が入力されて上記始動用タイミング生成器9から常用タ
イミング生成器10へと切換えられ、この常用タイミン
グ生成器10からの信号によって電磁弁5で給気弁6が
開閉タイミングによって駆動されることとなる。
That is, at the time of starting, the signal from the starting timing generator 9 is selected by the signal switch 3,
On the basis of this signal, the solenoid valve 5 opens and closes the air supply valve 6 at the opening and closing timing for starting. When it is determined that the ignition has occurred by the ignition determiner 4 provided for each cylinder, an ignition determination signal is input to the signal switch 3 of the cylinder, and the starting timing generator 9 outputs the normal timing generator. The air supply valve 6 is driven by the solenoid valve 5 at the opening / closing timing by the signal from the regular timing generator 10.

【0047】なお、この出願に係る発明は、ほぼ一定出
力で長期航行する回転数変動の少ない舶用ディーゼル機
関を対象としているため、上述した第1,第2実施例の
ように給気弁6を電磁弁5で開閉駆動するように構成す
れば、油圧等の大きな力によってほぼ一定間隔で給気弁
6を一定角度だけ開閉させることができる。
Since the invention according to this application is intended for a marine diesel engine that runs for a long time at a substantially constant output and has a small fluctuation in the number of revolutions, the air supply valve 6 is provided as in the first and second embodiments described above. If it is configured to be opened and closed by the electromagnetic valve 5, the air supply valve 6 can be opened and closed by a constant angle at substantially constant intervals by a large force such as hydraulic pressure.

【0048】次に、第3実施例を図3に示すブロック図
に基づいて説明する。この第3実施例は、各シリンダご
とに設けられた始動用カム11と常用カム12とをカム
切換器13で切換えて給気弁6を開閉させる実施例であ
り、着火判定器4からの着火判定信号に基づいてこれら
のカムを切換えるように構成されている。なお、この第
3実施例は、機械的な構成によって始動用と常用の開閉
タイミングを切換えるものである。また、上述した第
1,第2実施例と同一の構成には同一符号を付して説明
する。
Next, a third embodiment will be described with reference to the block diagram shown in FIG. The third embodiment is an embodiment in which the starting cam 11 and the regular cam 12 provided for each cylinder are switched by the cam switching device 13 to open and close the air supply valve 6. These cams are switched based on a determination signal. In the third embodiment, the opening and closing timings for starting and normal use are switched by a mechanical configuration. Further, the same configurations as those of the first and second embodiments described above are denoted by the same reference numerals and described.

【0049】上記始動用カム11は、上述した第1,第
2実施例と同様に給気弁6が始動用の開閉動作を行う形
状に形成されており、上記常用カム12は、給気弁6が
常用の開閉動作を行う形状に形成されている。つまり、
始動用カム11は常用カム12に比べて給気弁閉時点が
早くなる形状である。なお、着火判定器4は上述した実
施例と同一であり、着火判定信号はカム切換器13に出
力される。
The starting cam 11 is formed in a shape in which the air supply valve 6 performs opening and closing operations for starting, similarly to the first and second embodiments described above. 6 is formed in a shape for performing a normal opening and closing operation. That is,
The starting cam 11 is shaped such that the air supply valve closes earlier than the regular cam 12. Note that the ignition determination device 4 is the same as that of the above-described embodiment, and an ignition determination signal is output to the cam switching device 13.

【0050】カム切換器13は、着火判定器4からの着
火判定信号がONの場合は常用カム11、着火判定信号
がOFFの場合は始動用カム12に切換えて給気弁6を
開閉動作させるように構成されている。この切換え方法
としては、並設されたカムをクラッチで切換える方法や
油圧で切換える方法などがある。なお、給気弁6は切換
えられた始動用カム11又は常用カム12に従って開閉
させられる。
The cam switching unit 13 switches to the regular cam 11 when the ignition determination signal from the ignition determination unit 4 is ON, and switches to the starting cam 12 when the ignition determination signal is OFF to open and close the air supply valve 6. It is configured as follows. As the switching method, there is a method of switching the cams arranged in parallel by a clutch, a method of switching by a hydraulic pressure, and the like. The air supply valve 6 is opened and closed according to the switched starting cam 11 or regular cam 12.

【0051】このように構成された第3実施例の給気弁
制御装置によれば、以下のように作用して舶用大型ディ
ーゼル機関の始動を行うことができる。
According to the air supply valve control device of the third embodiment configured as described above, the large-sized marine diesel engine can be started by the following operation.

【0052】すなわち、始動時にはカム切換器13によ
って始動用カム11に切換えられており、この始動用カ
ム11によって給気弁6が始動用の開閉タイミングで開
閉させられる。そして、各シリンダごとに設けられた着
火判定器4によって着火したことが判定されてカム切換
器13に着火判定の信号が入力されると、このカム切換
器13によって上記始動用カム11から常用カム12へ
と切換えられ、この常用カム12によって給気弁6が常
用開閉タイミングで駆動されることとなる。
That is, at the start, the cam switch 13 is used to switch to the starting cam 11, and the starting cam 11 opens and closes the air supply valve 6 at the opening and closing timing for the start. When the ignition is determined by the ignition determiner 4 provided for each cylinder and an ignition determination signal is input to the cam switch 13, the cam switch 13 switches the normal cam from the starting cam 11. The air supply valve 6 is driven by the regular cam 12 at the regular opening / closing timing.

【0053】ところで、舶用大型ディーゼル機関にあっ
ては、一旦航海に出ると数日間寄港できないような航海
を行わざるを得ない場合がある。このような時に洋上で
一部のシリンダのみが故障し、しかも寄港することがで
きず、また修理も困難な場合がある。このような場合、
船舶にあっては故障したシリンダのみを停止させて切り
離すことにより他のシリンダへの影響を断った後、他の
シリンダの駆動力のみによって航海を続けることとな
る。したがって、故障したシリンダはその後停止した状
態となってしまう。
By the way, in the case of a large marine diesel engine, it is sometimes necessary to perform a voyage in which once a voyage is made, the port cannot be called for several days. In such a case, only some of the cylinders may break down on the sea, and may not be able to call at the port, and may be difficult to repair. In such a case,
In the case of a ship, after stopping only the failed cylinder and disconnecting it to cut off the influence on other cylinders, the voyage is continued only by the driving force of the other cylinder. Therefore, the failed cylinder is in a stopped state thereafter.

【0054】そこで、この出願に係る発明によれば、上
述した第1〜第3実施例のように各シリンダごとに着火
判定器4を設けて個々の着火判定を行っているため、上
記したように一部のシリンダを停止させた状態でも始動
用と常用の開閉タイミングを切換えて給気弁6を開閉さ
せることとなるため、一部が故障した舶用大型ディーゼ
ル機関でも冬期や寒冷地における始動時に容易に始動す
ることができる。
Therefore, according to the invention of this application, as in the above-described first to third embodiments, the ignition decision unit 4 is provided for each cylinder to perform the individual ignition decision. Even when some of the cylinders are stopped, the air supply valve 6 is opened and closed by switching between the opening and closing timings for starting and regular use. Can be started easily.

【0055】[0055]

【発明の効果】この出願に係る発明は、以上説明したよ
うに構成しているので、以下に記載するような効果を奏
する。
The invention according to the present application is configured as described above, and has the following effects.

【0056】請求項1又は請求項2に係る舶用大型ディ
ーゼル機関の給気弁制御方法又は給気弁装置によれば、
始動時に着火したシリンダは、順次、各シリンダごとに
始動用開閉タイミングから常用開閉タイミングに切換え
て給気弁を開閉するため、各シリンダごとに始動時のみ
給気弁の閉じる角度を下死点近傍まで早くしてシリンダ
内空気の上死点での圧縮温度を高くして燃料を着火し易
くできるため、始動前に暖機をしてシリンダ壁を暖める
必要もなく、冬期や寒冷地のように寒い環境下において
も簡単に舶用大型ディーゼル機関を始動することが可能
となる。
According to the air supply valve control method or the air supply valve device for a large marine diesel engine according to claim 1 or 2,
Cylinders ignited at start-up are sequentially switched from start-up open-close timing to normal open-close timing for each cylinder to open and close the air supply valve. As it is possible to raise the compression temperature at the top dead center of the air inside the cylinder and make it easier to ignite the fuel, there is no need to warm up the cylinder wall and warm up the cylinder wall before starting, as in winter and cold regions It is possible to easily start a large marine diesel engine even in a cold environment.

【0057】したがって、着火し易くするために始動時
に着火温度の低い特別な燃料を用いる必要もないので燃
料費が安くなり、また、高い回転数まで始動空気で回転
させるために始動弁の口径を特別大きなものにする必要
がなくなるので、始動弁や始動空気リバーサを大きなも
のにする必要もなくなる。
Therefore, it is not necessary to use a special fuel having a low ignition temperature at the time of starting in order to facilitate ignition, so that the fuel cost is reduced, and the diameter of the starting valve is increased in order to rotate the engine up to a high rotational speed with the starting air. Since it is not necessary to make it particularly large, it is not necessary to make the starting valve and the starting air reverser large.

【0058】しかも、各シリンダごとに着火を判定して
いるため、シリンダごとのばらつきによる未着火のシリ
ンダと着火のシリンダがあった場合でも、未着火のシリ
ンダは給気弁の閉じる角度を早くして着火を促し、着火
したシリンダは給気弁の閉じる角度を遅らせてディーゼ
ルノックを防止することができるので、舶用大型ディー
ゼル機関の耐久性を向上させることも可能となる。
Further, since ignition is determined for each cylinder, even if there is an unignited cylinder and an ignited cylinder due to variations for each cylinder, the unignited cylinder sets the closing angle of the air supply valve earlier. Since the ignition of the cylinder is promoted and the cylinder that has ignited can delay the closing angle of the air supply valve to prevent diesel knock, it is possible to improve the durability of the large marine diesel engine.

【0059】請求項3又は請求項4に係る舶用大型ディ
ーゼル機関の給気弁制御方法又は給気弁装置によれば、
始動時には各シリンダごとに始動用タイミング生成器か
ら給気弁の閉弁角度を早めた始動用開閉タイミングによ
り給気弁を開閉し、着火したシリンダは、順次、各シリ
ンダごとに始動用開閉タイミングから常用開閉タイミン
グに切換えて給気弁を開閉するため、始動時は給気弁の
閉じる角度を下死点近傍まで早くしてシリンダ内空気の
上死点での圧縮温度を高くして燃料を着火し易くできる
ため、始動前に暖機をしてシリンダ壁を暖める必要もな
く、冬期や寒冷地のように寒い環境下においても簡単に
舶用大型ディーゼル機関を始動することが可能となる。
According to an air supply valve control method or an air supply valve device for a large marine diesel engine according to claim 3 or 4,
At start-up, the air supply valve is opened / closed by the start timing generator for each cylinder at the start opening / closing timing with the air supply valve closing angle advanced, and the ignited cylinders are sequentially turned on / off from the start / open timing for each cylinder. In order to open and close the air supply valve by switching to the normal opening and closing timing, at the start, the closing angle of the air supply valve is advanced to near the bottom dead center, the compression temperature at the top dead center of the air in the cylinder is raised, and fuel is ignited Therefore, it is not necessary to warm up the cylinder wall by warming up before starting, and the large marine diesel engine can be easily started even in a cold environment such as winter or a cold region.

【0060】したがって、上記請求項1又は請求項2と
同様に燃料費が安くなるとともに、始動弁や始動空気リ
バーサを大きなものにする必要もなくなり、しかもディ
ーゼルノックを防止することもできる。
Accordingly, the fuel cost is reduced as in the case of the first or second aspect, and it is not necessary to increase the size of the starting valve and the starting air reverser, and it is also possible to prevent diesel knock.

【0061】請求項5又は請求項6に係る舶用大型ディ
ーゼル機関の給気弁制御方法又は給気弁装置によれば、
始動時には各シリンダごとにカム切換器で閉弁角度を早
めた始動用カムに切換えて給気弁を開閉し、着火したシ
リンダは、順次、各シリンダごとに始動用カムから常用
カムに切換えて給気弁を開閉するため、始動時は給気弁
を閉じる角度を下死点近傍まで早くしてシリンダ内空気
の上死点での圧縮温度を高くして燃料を着火し易くでき
るため、始動前に暖機をしてシリンダ壁を暖める必要も
なく、冬期や寒冷地のように寒い環境下においても簡単
に舶用大型ディーゼル機関を始動することが可能とな
る。
According to an air supply valve control method or an air supply valve device for a large marine diesel engine according to claim 5 or 6,
At start-up, each cylinder is switched to a start-up cam with the valve closing angle advanced by a cam switch to open and close the air supply valve, and the ignited cylinders are sequentially switched from the start-up cam to the regular cam for each cylinder. To start and close the air valve, the angle at which the air supply valve is closed should be advanced to near the bottom dead center during startup, and the compression temperature at the top dead center of the air in the cylinder can be increased to facilitate ignition of fuel. Therefore, it is not necessary to warm up the cylinder wall to warm up the cylinder wall, and it is possible to easily start the large marine diesel engine even in a cold environment such as winter or a cold region.

【0062】したがって、上記請求項1〜請求項4のい
ずれかと同様に燃料費が安くなるとともに、始動弁や始
動空気リバーサを大きなものにする必要もなくなり、し
かもディーゼルノックを防止することもできる。
Accordingly, the fuel cost is reduced as in any one of the first to fourth aspects, and it is not necessary to increase the size of the starting valve and the starting air reverser, and diesel knock can be prevented.

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

【図1】この出願に係る発明の第1実施例を示すブロッ
ク図である。
FIG. 1 is a block diagram showing a first embodiment of the invention according to this application.

【図2】この出願に係る発明における着火判定の一例を
示す図であり、各シリンダの回転数変化率で着火判定す
る線図である。
FIG. 2 is a diagram illustrating an example of ignition determination in the invention according to the present application, and is a diagram illustrating ignition determination based on a rate of change in the rotational speed of each cylinder.

【図3】この出願に係る発明における他の着火判定を例
示する図であり、(a) は回転数で検出する線図で、(b)
は加速度で検出する線図である。
FIG. 3 is a diagram exemplifying another ignition determination in the invention according to the present application, wherein (a) is a diagram for detecting rotation speed and (b)
Is a diagram for detecting acceleration.

【図4】(a),(b) 共に、この出願に係る発明を適用した
場合の給気弁の始動用と常用の動作を示す説明図であ
る。
FIGS. 4 (a) and 4 (b) are explanatory diagrams showing a start-up operation and a normal operation of an air supply valve when the invention according to the present application is applied.

【図5】この出願に係る発明の第2実施例を示すブロッ
ク図である。
FIG. 5 is a block diagram showing a second embodiment of the invention according to this application.

【図6】この出願に係る発明の第3実施例を示すブロッ
ク図である。
FIG. 6 is a block diagram showing a third embodiment of the invention according to this application.

【符号の説明】[Explanation of symbols]

1…始動用ピックアップセンサ 2…常用ピックアップセンサ 3…信号切換器 4…着火判定器 5…電磁弁 6…給気弁 7…回転数検出器 8…ピックアップセンサ 9…始動用タイミング生成器 10…常用タイミング生成器 11…始動用カム 12…常用カム 13…カム切換器 t1 …始動用開閉タイミング t2 …常用開閉タイミング F…着火判定DESCRIPTION OF SYMBOLS 1 ... Pickup sensor for starting 2 ... Pickup sensor for regular use 3 ... Signal switcher 4 ... Ignition judging device 5 ... Solenoid valve 6 ... Supply valve 7 ... Rotation speed detector 8 ... Pickup sensor 9 ... Timing generator for starting 10 ... Regular use The timing generator 11 ... starting cam 12 ... common cam 13 ... cam changer t 1 ... closing timing t 2 ... customary closing timing F ... ignition determination for starting

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平1−315631(JP,A) 実開 昭61−145806(JP,U) (58)調査した分野(Int.Cl.6,DB名) F02D 13/02 F02D 41/06 351 F01L 1/34 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A 1-315631 (JP, A) JP-A 61-145806 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) F02D 13/02 F02D 41/06 351 F01L 1/34

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、前
記複数気筒の各シリンダごとに、給気弁の閉弁角度を下
死点近傍まで早くした始動用開閉タイミングと、給気弁
の閉弁角度を常用角度にした常用開閉タイミングを設定
し、始動時には各シリンダごとに給気弁の閉弁角度を早
めた始動用開閉タイミングで給気弁を開閉し、該各シリ
ンダごとの着火判定信号により着火判定すると、着火し
た各シリンダごとに前記始動用開閉タイミングから常用
開閉タイミングに切換えて給気弁を開閉し、順次着火し
た各シリンダごとに始動用開閉タイミングから常用開閉
タイミングに切換えて給気弁を開閉することを特徴とす
る舶用大型ディーゼル機関の給気弁制御方法。
1. A four-stroke long-stroke engine is employed.
Of a large multi-cylinder marine diesel engine
For each cylinder of multiple cylinders, lower the closing angle of the air supply valve.
Start-up opening / closing timing that is advanced to near the dead center and air supply valve
Set the regular opening / closing timing with the regular closing angle of the valve
Then, at the start, the supply valve is opened and closed at a start opening / closing timing in which the closing angle of the supply valve is advanced for each cylinder, and ignition is determined by an ignition determination signal for each cylinder. A large marine diesel engine characterized by switching the start-up opening / closing timing to the regular opening-and-closing timing to open and close the air supply valve, and switching the starting-opening / closing timing to the normal opening / closing timing to open and close the supply valve for each fired cylinder. Engine air supply valve control method.
【請求項2】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、 始動時に給気弁の閉弁角度を早めた始動用開閉タイミン
グを出力する始動用ピックアップセンサ各シリンダご
に設けるとともに、常用時に給気弁の常用開閉タイミ
ングを出力する常用ピックアップセンサ各シリンダご
に設け、各シリンダで着火したことを判定して着火判
定信号を出力する着火判定器各シリンダごとに設け、
前記始動用ピックアップセンサからの始動用開閉タイミ
ングと前記常用ピックアップセンサからの常用開閉タイ
ミングを入力し、前記着火判定器の着火判定信号によっ
て該始動用開閉タイミングから常用開閉タイミングに切
換えて出力する信号切換器各シリンダごとに設けて
信号切換器からの給気弁開閉タイミングにより給気弁
開閉するように構成したことを特徴とする舶用大型ディ
ーゼル機関の給気弁装置。
2. A four-stroke long stroke engine is employed.
In marine large diesel engine plurality of cylinders that use, provided with a startup pickup sensor you output the starting-off timing of early closing angle of intake valve at startup for each cylinder, intake valve conventional in civil time the normal pickup sensor you output close timing provided for each cylinder, provided with wear fire determiner you outputs ignition determination signal by determining that ignited in each cylinder for each cylinder,
Signal switching for inputting a start opening / closing timing from the starting pickup sensor and a normal opening / closing timing from the normal pickup sensor, and switching from the starting opening / closing timing to the normal opening / closing timing according to an ignition determination signal of the ignition determiner, and outputting the signal. intake valve device of marine large diesel engine, characterized by being configured so that vessel to <br/> open and close by Rikyu valves in air supply valve opening and closing timing from the signal switching device is provided for each cylinder .
【請求項3】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、
ックアップセンサによりクランク角度信号を検出し、該
クランク角度信号に基づいて、前記複数気筒の各シリン
ダごとに、給気弁の閉弁角度を下死点近傍まで早くした
始動用開閉タイミングと、給気弁の閉弁角度を常用角度
にした常用開閉タイミングを生成し、始動時には各シリ
ンダごとに前記始動用開閉タイミングを出力し、該各シ
リンダごとの着火判定信号により着火判定すると、着火
した各シリンダごとに前記始動用開閉タイミングから常
用開閉タイミングに切換えて給気弁を開閉し、順次着火
した各シリンダごとに始動用開閉タイミングから常用開
閉タイミングに切換えて給気弁を開閉することを特徴と
する舶用大型ディーゼル機関の給気弁制御方法。
3. A four-stroke long stroke engine is employed.
In a large-sized marine diesel engine having a plurality of cylinders, a crank angle signal is detected by a pickup sensor, and each cylinder of the plurality of cylinders is detected based on the crank angle signal.
The closing angle of the air supply valve has been advanced to near the bottom dead center
Normal opening / closing timing and the closing angle of the air supply valve
When the engine is started, the starting open / close timing is output for each cylinder, and the ignition is determined by the ignition determination signal for each cylinder. A supply valve control for a large marine diesel engine characterized in that the supply valve is opened and closed by switching to the opening and closing timing, and the supply valve is opened and closed by switching from the opening and closing timing for starting to the regular opening and closing timing for each cylinder that has ignited sequentially Method.
【請求項4】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、 クランク角度を一定角度間隔で信号として出力するピッ
クアップセンサを設け、該ピックアップセンサからの信
号により給気弁の閉弁角度を下死点近傍まで早めた始動
用開閉タイミングを生成して出力する始動用タイミング
生成器各シリンダごとに設けるとともに、前記ピック
アップセンサからの信号により給気弁の閉弁角度を常用
角度にした常用開閉タイミングを生成して出力する常用
タイミング生成器各シリンダごとに設け、各シリンダ
で着火したことを判定して着火判定信号を出力する着火
判定器各シリンダごとに設け、前記始動用タイミング
生成器からの始動用開閉タイミングと前記常用タイミン
グ生成器からの常用開閉タイミングを入力し、前記着火
判定器の着火判定信号によって該始動用開閉タイミング
から常用開閉タイミングに切換えて出力する信号切換器
各シリンダごとに設けて該信号切換器からの給気弁開
閉タイミングにより給気弁開閉するように構成したこ
とを特徴とする舶用大型ディーゼル機関の給気弁装置。
4. A four-stroke long stroke engine is employed.
In a large marine diesel engine with multiple cylinders used, a pickup sensor that outputs a crank angle as a signal at fixed angular intervals is provided , and the closing angle of the air supply valve is advanced to near the bottom dead center by a signal from the pickup sensor. A start timing generator for generating and outputting the opening / closing timing for each cylinder is provided for each cylinder, and the closing angle of the air supply valve is regularly used based on a signal from the pickup sensor.
The common timing generator for generating and outputting a common closing timing angle provided for each cylinder, provided with ignition determination unit that determines that the ignition in each cylinder and outputs an ignition judgment signal for each cylinder, wherein A signal for inputting a start opening / closing timing from a start timing generator and a regular opening / closing timing from the regular timing generator, and switching from the opening / closing timing to the regular opening / closing timing according to an ignition determination signal of the ignition determiner, and outputting the signal. Switch
The intake valve device marine large diesel engine, characterized by being configured to open and close the by Rikyu valves in air supply valve opening and closing timing from the signal switching device is provided for each cylinder.
【請求項5】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、
動時には各シリンダごとに閉弁角度を給気弁の閉弁角度
を下死点近傍まで早めた始動用カムに切換え、該各シリ
ンダごとの着火判定信号により着火判定すると、着火し
た各シリンダごとに前記始動用カムから給気弁の閉弁角
度を常用角度にした常用カムに切換えて給気弁を開閉
し、順次着火したシリンダごとに始動用カムから常用カ
ムに切換えて給気弁を開閉することを特徴とする舶用大
型ディーゼル機関の給気弁制御方法。
5. A four-stroke long stroke engine is employed.
In a large-sized multi-cylinder marine diesel engine used at startup, the closing angle of each cylinder is determined by the closing angle of the supply valve at startup.
Switching the starting cam ahead until near the bottom dead center, when ignition determination by ignition determination signal for each respective cylinder, closing angle of intake valve from the starting cam for each cylinder and ignited
The supply of large diesel engines for ships is characterized by switching to a regular cam with a normal angle to open and close the air supply valve, and switching from the starting cam to the regular cam for each cylinder that has ignited and opening and closing the air supply valve. Valve control method.
【請求項6】 4サイクルのロングストローク機関を採
用した複数気筒の舶用大型ディーゼル機関において、 始動時に給気弁の閉弁角度を下死点近傍まで早めた始動
用開閉動作を作る始動用カム各シリンダごとに設ける
とともに、常用時に給気弁の閉弁角度を常用角度にした
常用開閉動作を作り出す常用カム各シリンダごとに設
け、各シリンダで着火したことを判定して着火判定信号
を出力する着火判定器各シリンダごとに設け、該着火
判定器の着火判定信号によって前記始動用カムから常用
カムに切換えるカム切換器各シリンダごとに設けて
カム切換器で切換える始動用又は常用カムにより給気弁
開閉するように構成したことを特徴とする舶用大型デ
ィーゼル機関の給気弁装置。
6. A four-stroke long stroke engine is employed.
In each large cylinder diesel engine with multiple cylinders, a starting cam is provided for each cylinder to make the opening and closing operation of the intake valve advanced at the start to near the bottom dead center at startup.
Together, set the common cam produce <br/> conventional opening and closing operation that the common angle closing angle of intake valve during regular each cylinder
Only, the ignition determination unit for outputting an ignition judgment signal is determined to be ignited in the cylinder provided for each cylinder, a cam switching device for switching on the normal cam from the starting cam by ignition determination signal該着fire determiner by the starting or customary cam switches in the cam switching device is provided for each cylinder Rikyu valves
Intake valve device of marine large diesel engine, characterized by being configured to open and close the.
JP7109569A 1995-05-08 1995-05-08 Supply valve control method and apparatus for large marine diesel engine Expired - Lifetime JP2908281B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7109569A JP2908281B2 (en) 1995-05-08 1995-05-08 Supply valve control method and apparatus for large marine diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7109569A JP2908281B2 (en) 1995-05-08 1995-05-08 Supply valve control method and apparatus for large marine diesel engine

Publications (2)

Publication Number Publication Date
JPH08303275A JPH08303275A (en) 1996-11-19
JP2908281B2 true JP2908281B2 (en) 1999-06-21

Family

ID=14513577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7109569A Expired - Lifetime JP2908281B2 (en) 1995-05-08 1995-05-08 Supply valve control method and apparatus for large marine diesel engine

Country Status (1)

Country Link
JP (1) JP2908281B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3799833B2 (en) * 1998-09-07 2006-07-19 日産自動車株式会社 Cylinder intake air amount detection device for variable valve engine
JP4696765B2 (en) * 2005-08-05 2011-06-08 日産自動車株式会社 Engine starting method and engine starting device
US7690338B2 (en) * 2007-05-17 2010-04-06 Mazda Motor Corporation Method of starting internal combustion engine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424085Y2 (en) * 1985-03-04 1992-06-05
JPH01315631A (en) * 1988-06-15 1989-12-20 Toyota Motor Corp Two-cycle diesel engine

Also Published As

Publication number Publication date
JPH08303275A (en) 1996-11-19

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