JPH0521139U - Rotational braking system for 2-cycle large diesel engine - Google Patents

Rotational braking system for 2-cycle large diesel engine

Info

Publication number
JPH0521139U
JPH0521139U JP7821891U JP7821891U JPH0521139U JP H0521139 U JPH0521139 U JP H0521139U JP 7821891 U JP7821891 U JP 7821891U JP 7821891 U JP7821891 U JP 7821891U JP H0521139 U JPH0521139 U JP H0521139U
Authority
JP
Japan
Prior art keywords
exhaust valve
engine
diesel engine
braking
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP7821891U
Other languages
Japanese (ja)
Inventor
誠二 進藤
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP7821891U priority Critical patent/JPH0521139U/en
Publication of JPH0521139U publication Critical patent/JPH0521139U/en
Withdrawn legal-status Critical Current

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  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

(57)【要約】 【目的】 油圧駆動排気弁を有するディーゼル機関にお
いて簡単な油圧装置を追加することによって格段の大き
い制動効果が得られるようにすることである。 【構成】 本考案の2サイクル大型ディーゼル機関の回
転制動装置は従来形の始動空気管制投入装置を利用して
機関制動を行うと共に、さらにクランク角検出装置10
を介して排気弁のアクチュエータ4をコントロールし機
関の膨張行程時に排気弁3を開放し、正の膨張仕事を殆
んどゼロとすることにより格段の制動効果が得られるよ
うに構成したものである。
(57) [Abstract] [Purpose] To achieve a significantly large braking effect by adding a simple hydraulic device in a diesel engine having a hydraulically driven exhaust valve. The two-cycle large-scale diesel engine rotary braking device of the present invention uses a conventional starting air control injection device to perform engine braking, and further, a crank angle detecting device 10
The actuator 4 of the exhaust valve is controlled via the valve to open the exhaust valve 3 during the expansion stroke of the engine so that the positive expansion work becomes almost zero, so that a remarkable braking effect can be obtained. ..

Description

【考案の詳細な説明】[Detailed description of the device]

【0001】[0001]

【産業上の利用分野】[Industrial applications]

本考案は2サイクル大型ディーゼル機関の回転制動装置に関する。 The present invention relates to a rotary braking device for a two-cycle large diesel engine.

【0002】[0002]

【従来の技術】[Prior Art]

図1に示す従来形の機関回転制動装置は公知のシステムである始動空気管制投 入装置13,14,15を利用し、機関の圧縮行程時にシリンダ内に圧縮空気を 投入することにより、負空気圧縮仕事を正の空気膨張仕事より増加させ回転制御 を計っている。即ちピストン2が上昇しシリンダ内空気を圧縮する圧縮行程にお いて、始動空気管制弁14をコントロールし、始動空気槽13に蓄圧されている 始動空気を始動弁15よりシリンダ1内に投入し、負の圧縮仕事を増大し機関に 回転制動をかけるようにしている。 The conventional engine rotary braking device shown in FIG. 1 utilizes starting air control injection devices 13, 14, 15 which are known systems, and by introducing compressed air into the cylinder during the compression stroke of the engine, negative air is injected. The rotation control is measured by increasing the compression work from the positive air expansion work. That is, in the compression stroke in which the piston 2 rises and compresses the air in the cylinder, the starting air control valve 14 is controlled, and the starting air accumulated in the starting air tank 13 is introduced into the cylinder 1 from the starting valve 15. The negative compression work is increased to rotationally brake the engine.

【0003】 しかしシリンダ内空気圧が始動空気槽13内の圧力を越えた後にはシリンダ内 の空気が始動空気槽13内へ逆流を始める。又上死点通過後暫くすると始動弁1 5は閉じるため、シリンダ内空気と始動空気槽13の連通は遮断され、単純な空 気膨張行程となる。従って空気膨張行程におけるシリンダ内空気量は圧縮行程に おける空気量より少なくなっており、正の膨張仕事は負の圧縮仕事より小さくな る。 上記正の膨張仕事と負の圧縮仕事の差により機関に回転制動が加えられる。However, after the air pressure in the cylinder exceeds the pressure in the starting air tank 13, the air in the cylinder starts to flow back into the starting air tank 13. Further, since the starting valve 15 is closed shortly after passing through the top dead center, the communication between the air in the cylinder and the starting air tank 13 is cut off, and a simple air expansion stroke is performed. Therefore, the amount of air in the cylinder in the air expansion stroke is less than the amount of air in the compression stroke, and the positive expansion work is smaller than the negative compression work. The difference between the positive expansion work and the negative compression work applies rotational braking to the engine.

【0004】[0004]

【考案が解決しようとする課題】[Problems to be solved by the device]

ところが従来技術においては、膨張時のシリンダ内にはなお相当量の空気が残 留しているため、(空気の排出は圧縮空気圧が始動空気槽より高くなった後の始 動弁からの逆流のみであり、しかもその期間もほぼ上死点迄の短時間である)こ の残留空気量に応じた正の膨張仕事を余儀なくされ、充分に大きい回転制動効果 が得られない欠点があった。 However, in the conventional technology, since a considerable amount of air still remains in the cylinder during expansion, (the only discharge of air is the backflow from the start valve after the compressed air pressure becomes higher than the starting air tank. Moreover, the period is a short time up to the top dead center.) The positive expansion work is inevitable according to the residual air amount, and there is a drawback that a sufficiently large rotational braking effect cannot be obtained.

【0005】 本考案の目的は前記従来装置の問題点を解消し、油圧駆動排気弁を有するディ ーゼル機関において、簡単な油圧装置を追加することによって格段の大きい制動 効果が得られる2サイクル大型ディーゼル機関の回転制動装置を提供するにある 。The object of the present invention is to solve the above problems of the conventional device, and in a diesel engine having a hydraulically driven exhaust valve, by adding a simple hydraulic device, a two-cycle large-scale diesel engine having a significantly large braking effect can be obtained. To provide a rotary braking device for an engine.

【0006】[0006]

【課題を解決するための手段】[Means for Solving the Problems]

本考案の2サイクル大型ディーゼル機関の回転制動装置は、油圧駆動の排気弁 を有する2サイクル大型ディーゼル機関において、任意のタイミングで前記排気 弁を開弁可能とする油圧系統と、該油圧系統をクランクアングルと連動制御し機 関に対する制動効果を向上せしめる制御手段とを有してなることを特徴としてい る。 A rotary braking device for a two-cycle large diesel engine of the present invention is a two-cycle large diesel engine having a hydraulically driven exhaust valve, in which a hydraulic system capable of opening the exhaust valve at any timing and a crank system for the hydraulic system. It is characterized by having a control means for interlocking with the angle and improving the braking effect on the mechanism.

【0007】[0007]

【作用】[Action]

機関制動時に従来と同様に圧縮行程時始動空気槽より高圧空気をシリンダへ注 入すると共に、本考案では膨張行程時排気弁を開きシリンダを外気と連通するよ うにしたので正の膨張仕事がほぼゼロとなり、該正の膨張仕事が負の圧縮仕事に より相殺されることがなくなり、従来に比べ大きな回転制動を得ることが可能と なる。 When the engine is braking, high-pressure air is injected into the cylinder from the starting air tank during the compression stroke as before, and in the present invention, the exhaust valve is opened during the expansion stroke so that the cylinder communicates with the outside air. Since it becomes zero, the positive expansion work is not canceled by the negative compression work, and it becomes possible to obtain a large rotational braking as compared with the conventional case.

【0008】 以下図1を参照し本考案の一実施例について説明する。 排気弁駆動油槽9には油ポンプ11を介して排気弁3を駆動するに充分な油圧 が蓄圧される。又前記排気弁駆動油槽9はクランク角検出装置でコントロールさ れる制御弁8を介して排気弁3のアクチュエータ4と連通している。 なお、図1に記載された機関本体は公知の油圧駆動の排気弁3を有するもので あり、機関により駆動される油圧発生装置5は高圧駆動油管6〜7を介して通常 運転時は一定のタイミングで開閉を行う排気弁アクチュエータ4と連通している 。又本考案の制動装置には公知の始動空気管制投入装置13,14,15を利用 した従来形の制動装置を有している。An embodiment of the present invention will be described below with reference to FIG. In the exhaust valve driving oil tank 9, a sufficient hydraulic pressure for driving the exhaust valve 3 is accumulated via the oil pump 11. The exhaust valve driving oil tank 9 communicates with the actuator 4 of the exhaust valve 3 via a control valve 8 controlled by a crank angle detecting device. The engine body shown in FIG. 1 has a well-known hydraulically driven exhaust valve 3, and the hydraulic pressure generator 5 driven by the engine is driven through the high pressure driven oil pipes 6 to 7 so as to maintain a constant level during normal operation. It communicates with the exhaust valve actuator 4, which opens and closes at the timing. The braking device of the present invention has a conventional braking device utilizing the known starting air control injection devices 13, 14, and 15.

【0009】 次に前記実施例の作用について説明する。 機関に回転制動をかけるときにはクランク軸回転角度検出装置10からの制御 信号に従い膨張行程時に制御弁8を開弁し前述の通常運転時の排気弁開閉タイミ ングとは独立に排気弁アクチュエータ4に排気弁駆動油槽9の油圧を導入し排気 弁3を開弁し膨張行程時の正の仕事を殆んどゼロとし機関に対する回転制動効果 を従来に比べ格段に増大せしめるようにしている。 なお本実施例ではクランク角検出装置10、油槽9、制御弁8を新設し、膨張 行程時のタイミングを検出するようにしているが、排気弁3を制御するために有 している排気弁駆動油圧発生装置5内のクランク角検出装置の一部を改造し、機 関制動時において機関の膨張行程で排気弁が開くようにすれば同一の作用効果を 得ることができる。Next, the operation of the above embodiment will be described. When the engine is rotationally braked, the control valve 8 is opened during the expansion stroke in accordance with a control signal from the crankshaft rotation angle detection device 10 to exhaust the exhaust valve actuator 4 independently of the exhaust valve opening / closing timing during the normal operation described above. The hydraulic pressure of the valve-driving oil tank 9 is introduced to open the exhaust valve 3 so that the positive work during the expansion stroke is almost zero, so that the rotary braking effect on the engine can be remarkably increased as compared with the conventional case. In this embodiment, the crank angle detecting device 10, the oil tank 9, and the control valve 8 are newly provided so as to detect the timing of the expansion stroke. However, the exhaust valve drive for controlling the exhaust valve 3 is required. The same effect can be obtained by partially modifying the crank angle detecting device in the hydraulic pressure generator 5 so that the exhaust valve opens during the expansion stroke of the engine during engine braking.

【0010】[0010]

【考案の効果】[Effect of the device]

本考案の2サイクル大型ディーゼル機関の回転制動装置は前記のとおり構成し たので、ディーゼル船舶の急速制動性が向上し、船舶航行上の安全性が向上する 。またディーゼル発電において回転数下降時の捩り振動共振回転数域を迅速に通 過させることが可能となり、機関の強度的信頼性の向上が実現できる。 Since the two-cycle large-scale diesel engine rotary braking device of the present invention is configured as described above, the quick braking property of the diesel ship is improved, and the safety in navigation of the ship is improved. Further, in the diesel power generation, it is possible to quickly pass through the torsional vibration resonance rotation speed range when the rotation speed is lowered, and it is possible to improve the strength reliability of the engine.

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

【図1】本考案の第1実施例に係る2サイクル大型ディ
ーゼル機関の回転制動装置図
FIG. 1 is a diagram of a rotary braking device for a two-cycle large diesel engine according to a first embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1…シリンダ、2…ピストン、3…排気弁、4…アクチ
ュエータ、5…排気弁駆動油圧発生装置、8…制御弁、
9…排気弁の駆動油槽、10…クランク角検出装置。
1 ... Cylinder, 2 ... Piston, 3 ... Exhaust valve, 4 ... Actuator, 5 ... Exhaust valve driving hydraulic pressure generating device, 8 ... Control valve,
9 ... Exhaust valve drive oil tank, 10 ... Crank angle detection device.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】 油圧駆動の排気弁を有する2サイクル大
型ディーゼル機関において、任意のタイミングで前記排
気弁を開弁可能とする油圧系統と、該油圧系統をクラン
クアングルと連動制御し機関に対する制動効果を向上せ
しめる制御手段とを有してなる2サイクル大型ディーゼ
ル機関の回転制動装置。
1. A two-cycle large-scale diesel engine having a hydraulically driven exhaust valve, a hydraulic system capable of opening the exhaust valve at an arbitrary timing, and a braking effect on the engine by controlling the hydraulic system in conjunction with a crank angle. A rotary braking device for a two-cycle large diesel engine, which has a control means for improving
JP7821891U 1991-09-03 1991-09-03 Rotational braking system for 2-cycle large diesel engine Withdrawn JPH0521139U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7821891U JPH0521139U (en) 1991-09-03 1991-09-03 Rotational braking system for 2-cycle large diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7821891U JPH0521139U (en) 1991-09-03 1991-09-03 Rotational braking system for 2-cycle large diesel engine

Publications (1)

Publication Number Publication Date
JPH0521139U true JPH0521139U (en) 1993-03-19

Family

ID=13655911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7821891U Withdrawn JPH0521139U (en) 1991-09-03 1991-09-03 Rotational braking system for 2-cycle large diesel engine

Country Status (1)

Country Link
JP (1) JPH0521139U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014516393A (en) * 2011-02-23 2014-07-10 アカーテース パワー,インク. 2-stroke opposed piston engine with engine brake
KR20160051607A (en) * 2014-10-31 2016-05-11 빈터투르 가스 앤 디젤 아게 Control method for a fast reversal of a reciprocating piston internal combustion engine
KR20160051606A (en) * 2014-10-31 2016-05-11 빈터투르 가스 앤 디젤 아게 Reversing method for a fast reversal of an engine, computer program product and engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014516393A (en) * 2011-02-23 2014-07-10 アカーテース パワー,インク. 2-stroke opposed piston engine with engine brake
KR20160051607A (en) * 2014-10-31 2016-05-11 빈터투르 가스 앤 디젤 아게 Control method for a fast reversal of a reciprocating piston internal combustion engine
KR20160051606A (en) * 2014-10-31 2016-05-11 빈터투르 가스 앤 디젤 아게 Reversing method for a fast reversal of an engine, computer program product and engine

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19951130