JP3030365B2 - Internal combustion engine - Google Patents
Internal combustion engineInfo
- Publication number
- JP3030365B2 JP3030365B2 JP6186814A JP18681494A JP3030365B2 JP 3030365 B2 JP3030365 B2 JP 3030365B2 JP 6186814 A JP6186814 A JP 6186814A JP 18681494 A JP18681494 A JP 18681494A JP 3030365 B2 JP3030365 B2 JP 3030365B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- hydraulically driven
- valve
- cycle
- fuel injection
- 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 - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
- F02B69/06—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different cycles, e.g. convertible from two-stroke to four stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Description
【０００１】[0001]
【産業上の利用分野】本発明は、２サイクル運転と４サ
イクル運転の切換えを可能とし、かつ圧縮圧力開放ブレ
ーキ作動を可能とした内燃機関に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine capable of switching between a two-cycle operation and a four-cycle operation and capable of operating a compression pressure release brake.
【０００２】[0002]
【従来の技術】内燃機関には周知のように２サイクル機
関と４サイクル機関とがあり、２サイクル機関は動弁系
が不要で、４サイクル機関に比較して小型軽量で高出力
が得られ、低Ｎｏｘの長所があり、４サイクル機関は、
吸，排気のために十分な時間が与えられ、混合気の吹き
抜けによる損失がなく、容積効率が高く、平均有効圧力
が高いことと、各部の熱的負荷が低く、始動が容易で緩
速運転が円滑に行われる長所がある。また、図６に示す
ように排気を絞り、排気圧力を上げることにより排気ブ
レーキ力を得ることができる。2. Description of the Related Art As is well known, an internal combustion engine includes a two-cycle engine and a four-cycle engine. The two-cycle engine does not require a valve train, and is smaller, lighter and more powerful than a four-cycle engine. , Low Nox, and the four-stroke engine
Sufficient time is provided for suction and exhaust, no loss due to gas mixture blow-through, high volumetric efficiency, high average effective pressure, low thermal load on each part, easy start-up, slow operation Has the advantage that it is performed smoothly. Also, as shown in FIG. 6, the exhaust braking force can be obtained by restricting the exhaust and increasing the exhaust pressure.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、２サイ
クル機関は短時間で排気と新気を入れ変える掃気のため
に機械式過給機を使用しているので機械式過給機の駆動
ロスにより燃費が悪く、かつ排気・吸入行程がないた
め、図６に示す排気ブレーキが使えないという欠点があ
り、４サイクル機関は排気量当たりの出力が２サイクル
機関より劣り、かつ重量が重い欠点がある。However, the two-stroke engine uses a mechanical supercharger for scavenging the exhaust gas and fresh air in a short time. 6, and the exhaust brake shown in FIG. 6 cannot be used because of the poor exhaust and intake strokes. The four-stroke engine has the disadvantage that the output per displacement is inferior to the two-stroke engine and the weight is heavy.
【０００４】そこで、本発明の目的は、２サイクル運転
と４サイクル運転の切換えを可能とし、２サイクル機関
と４サイクル機関の長所を引き出して、軽量化，性能向
上，排ガス改善，低燃費，高ブレーキ力の内燃機関を提
供することである。Accordingly, an object of the present invention is to make it possible to switch between two-cycle operation and four-cycle operation, to take advantage of two-stroke engines and four-stroke engines, and to reduce the weight, improve the performance, improve the exhaust gas, improve the fuel efficiency, and improve the fuel efficiency. It is to provide an internal combustion engine with a braking force.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めの本発明の特徴とする構成は、油圧駆動燃料噴射弁
と、油圧駆動吸，排気弁と掃気用の排気ターボ過給機と
を備え、コントローラにより前記油圧駆動燃料噴射弁の
燃料噴射時期と、油圧駆動吸，排気弁の開閉タイミング
を制御して、高負荷時には２サイクル運転に切換え、低
負荷時には４サイクル運転に切換え可能とし、かつ圧縮
行程終期で前記油圧駆動排気弁を開口制御して圧縮圧力
を開放しブレーキ作動可能としたものである。 In order to achieve the above object, the present invention is characterized in that a hydraulically driven fuel injection valve is provided.
And a hydraulically driven suction and exhaust valve and an exhaust turbocharger for scavenging.
And the controller controls the hydraulically driven fuel injection valve.
Fuel injection timing and opening / closing timing of hydraulically driven intake and exhaust valves
To switch to 2-cycle operation at high load,
Switching to 4-cycle operation at load and compression
At the end of the stroke, the hydraulically driven exhaust valve is
Is released to enable the brake operation.
【０００６】[0006]
【作用】上記の構成により、高負荷時と低負荷時の油圧
駆動吸，排気弁の開閉タイミング及び油圧駆動燃料噴射
弁の燃料噴射タイミングをコントローラによって油圧駆
動噴射弁及び油圧駆動吸，排気弁の作動回数を機関１回
転あたり１回、または１／２回に制御することにより２
サイクルモード及び４サイクルモードに制御し、かつ２
サイクル運転では排気エネルギによる排気ターボ過給機
で掃気を行い、高負荷時には２サイクル運転に切替え、
低負荷時には４サイクル運転に切換え可能とすると共
に、圧縮圧力開放ブレーキ作動により高ブレーキ力が得
られる。According to the above construction, the controller controls the timing of opening and closing the hydraulically driven intake and exhaust valves and the timing of the fuel injection of the hydraulically driven fuel injection valves at high load and low load. By controlling the number of actuations to one or one half per engine revolution, 2
Cycle mode and 4-cycle mode, and 2
In cycle operation, scavenging is performed by an exhaust turbocharger using exhaust energy, and switching to 2-cycle operation is performed at high load.
When the load is low, the operation can be switched to the four-cycle operation, and a high braking force can be obtained by operating the compression pressure release brake.
【０００７】[0007]
【実施例】以下、本発明の実施例を添付図面に基づいて
説明する。図１において、１はシリンダ、２はピスト
ン、３は吸気管、４は排気管である。Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a cylinder, 2 is a piston, 3 is an intake pipe, and 4 is an exhaust pipe.
【０００８】本発明は、上記シリンダ１に油圧駆動燃料
噴射弁５と、油圧駆動吸気弁６及び油圧駆動排気弁７と
を設け、作動油圧発生用ポンプ兼燃料圧送用ポンプ８と
前記油圧駆動燃料噴射弁５，油圧駆動吸気弁６及び油圧
駆動排気弁７とを高圧ギャラリ９を介してそれぞれ接続
し、前記排気管４に掃気用の排気ターボ過給機１０を接
続する。According to the present invention, a hydraulically driven fuel injection valve 5, a hydraulically driven intake valve 6, and a hydraulically driven exhaust valve 7 are provided in the cylinder 1, and a pump 8 for operating hydraulic pressure and a pump 8 for fuel pressure delivery and the hydraulically driven fuel The injection valve 5, the hydraulically driven intake valve 6, and the hydraulically driven exhaust valve 7 are connected via a high-pressure gallery 9, respectively, and an exhaust turbocharger 10 for scavenging is connected to the exhaust pipe 4.
【０００９】また、前記油圧駆動燃料噴射弁５，油圧駆
動吸気弁６及び油圧駆動排気弁７はコントローラ１１と
接続され、このコントローラ１１に入力されるエンジン
回転数信号，アクセル位置信号，作動油圧発生用ポンプ
兼燃料圧送用ポンプ８に内蔵されるパルサによって検出
される位相（角度）信号により前記油圧駆動燃料噴射弁
５，油圧駆動吸気弁６及び油圧駆動排気弁７が制御され
る構成である。The hydraulically driven fuel injection valve 5, hydraulically driven intake valve 6, and hydraulically driven exhaust valve 7 are connected to a controller 11, and an engine speed signal, an accelerator position signal, and an operating hydraulic pressure input to the controller 11. The hydraulically driven fuel injection valve 5, hydraulically driven intake valve 6, and hydraulically driven exhaust valve 7 are controlled by a phase (angle) signal detected by a pulser incorporated in the pump for pumping and fueling the fuel 8.
【００１０】本発明は上記の構成により、前記コントロ
ーラ１１によって油圧駆動燃料噴射弁５，油圧駆動吸気
弁６，油圧駆動排気弁７の開閉タイミングは図２で示す
ように、２サイクルモードと４サイクルモードに切換え
制御される。According to the present invention, the opening / closing timing of the hydraulically driven fuel injection valve 5, hydraulically driven intake valve 6, and hydraulically driven exhaust valve 7 by the controller 11 as shown in FIG. Switching to the mode is controlled.
【００１１】この２サイクルモードと４サイクルモード
との切換え制御は、油圧駆動燃料噴射弁５及び油圧駆動
吸，排気弁６，７の作動回数を機関１回転あたり１回、
または１／２回に制御することにより、高負荷時では２
サイクルモードに、また、低負荷時には４サイクルモー
ドに切換えられる。すなわち、図３で示すように、吸排
圧バランス限界より吸圧＞背圧の高負荷時では前記２サ
イクルモードに切り換え、吸圧＜背圧の低負荷時では４
サイクルモードに切換える。The switching control between the two-cycle mode and the four-cycle mode is performed by setting the number of actuations of the hydraulically driven fuel injection valve 5 and the hydraulically driven intake and exhaust valves 6, 7 to one per engine revolution.
Or, by controlling to １ ／ times, 2
The mode is switched to the cycle mode and to the four-cycle mode when the load is low. That is, as shown in FIG. 3, when the suction pressure is higher than the back pressure and the back pressure is higher than the back pressure limit, the mode is switched to the two-cycle mode.
Switch to cycle mode.
【００１２】これにより、高負荷のみで排気ターボ過給
機１０による掃気を行い、前記２サイクルモード切り換
えによって２サイクル運転され、低負荷では４サイクル
モードに切換えによる４サイクル運転が行われるのであ
る。Thus, scavenging by the exhaust turbocharger 10 is performed only at a high load, the two-cycle operation is performed by switching the two-cycle mode, and a four-cycle operation is performed at a low load by switching to the four-cycle mode.
【００１３】また、４サイクル運転時において、図４で
示すように、通常走行時は圧縮行程では点線Ａのように
油圧駆動排気弁７を閉じた状態に制御し、ブレーキ時は
実線Ｂのように圧縮行程終期で油圧駆動排気弁７を開口
制御することにより、圧縮圧力を開放しブレーキ力を得
ることができる。In the four-cycle operation, as shown in FIG. 4, during normal running, the hydraulically driven exhaust valve 7 is controlled to be closed as indicated by a dotted line A during a compression stroke, and as indicated by a solid line B during braking. By controlling the opening of the hydraulically driven exhaust valve 7 at the end of the compression stroke, the compression pressure can be released and a braking force can be obtained.
【００１４】さらに、２サイクル運転時においても、図
５で示すように、通常走行時は膨脹行程では点線Ａのよ
うに油圧駆動排気弁７を閉じた状態に制御し、ブレーキ
時は実線Ｂのように圧縮行程終期で油圧駆動排気弁７を
開口制御することにより、図７で示すように、圧縮圧力
開放ブレーキ作動が得られる。Further, even during the two-cycle operation, as shown in FIG. 5, during normal running, the hydraulically driven exhaust valve 7 is controlled to be closed as indicated by the dotted line A during the expansion stroke, and during the braking operation, the solid line B is controlled as indicated by the solid line B. By controlling the opening of the hydraulically driven exhaust valve 7 at the end of the compression stroke as described above, a compression pressure release brake operation is obtained as shown in FIG.
【００１５】[0015]
【発明の効果】本発明は以上の通り、油圧駆動燃料噴射
弁と、油圧駆動吸，排気弁と、掃気用の排気ターボ過給
機とを備え、コントローラにより前記油圧駆動燃料噴射
弁と、油圧駆動吸排気弁を制御して、高負荷時には２サ
イクル運転に切替え、低負荷時には４サイクル運転に切
換え可能とし、圧縮行程終期で前記油圧駆動排気弁を開
口制御して圧縮圧力を開放しブレーキ作動可能とした構
成であるから、２サイクル機関と４サイクル機関の長所
が引き出され、軽量化，性能向上，排ガス改善，低燃
費，低騒音・低振動，優れた発進加速性，高トルクライ
ズによるギヤチェンジ頻度低減が得られ、４サイクル運
転時の排気ブレーキ作動は勿論のこと、２サイクル機関
では得られなかった圧縮圧力開放ブレーキ作動が得ら
れ、高ブレーキ力の２サイクル・４サイクル機関を提供
することができる。As described above, the present invention comprises a hydraulically driven fuel injection valve, a hydraulically driven intake / exhaust valve, and an exhaust turbocharger for scavenging. By controlling the drive intake / exhaust valve, it is possible to switch to 2-cycle operation at high load and switch to 4-cycle operation at low load, and open the hydraulically driven exhaust valve at the end of the compression stroke.
The structure is such that the compression pressure is released by opening the mouth and the brake can be operated, so that the advantages of the two-stroke engine and the four-stroke engine are brought out, and the weight reduction, performance improvement, exhaust gas improvement, low fuel consumption, low fuel consumption, Noise, low vibration, excellent starting acceleration, and high torque rise reduce gear change frequency. Not only exhaust brake operation during four-cycle operation, but also compression pressure release brake operation that was not possible with a two-cycle engine is achieved. As a result, it is possible to provide a two-cycle / four-cycle engine with high braking force.
【図１】本発明による内燃機関の要部断面図FIG. 1 is a sectional view of a main part of an internal combustion engine according to the present invention.
【図２】本発明による内燃機関の２サイクルモードと４
サイクルモード図FIG. 2 shows a two-cycle mode and four modes of the internal combustion engine according to the present invention.
Cycle mode diagram
【図３】２サイクルモードと４サイクルモードとの切換
え制御を行うための機関負荷状況図FIG. 3 is an engine load status diagram for performing switching control between a two-cycle mode and a four-cycle mode.
【図４】４サイクル運転時における排気ブレーキ作動図FIG. 4 is an operation diagram of an exhaust brake during four-cycle operation.
【図５】２サイクル運転時における圧縮圧力開放ブレー
キ作動図FIG. 5 is an operation diagram of a compression pressure release brake during two-cycle operation.
【図６】排気ブレーキ作動説明図FIG. 6 is an explanatory diagram of an exhaust brake operation.
【図７】圧縮圧力開放ブレーキ作動説明図FIG. 7 is an explanatory diagram of a compression pressure release brake operation.
１ シリンダ ２ ピストン ３ 吸気管 ４ 排気管 ５ 油圧駆動燃料噴射弁 ６ 油圧駆動吸気弁 ７ 油圧駆動排気弁 ８ 作動油圧発生用ポンプ兼燃料圧送用ポンプ ９ 高圧ギャラリ １０ 排気ターボ過給機 １１ コントローラ DESCRIPTION OF SYMBOLS 1 Cylinder 2 Piston 3 Intake pipe 4 Exhaust pipe 5 Hydraulic drive fuel injection valve 6 Hydraulic drive intake valve 7 Hydraulic drive exhaust valve 8 Pump for operating hydraulic pressure generation and fuel pumping 9 High pressure gallery 10 Exhaust turbocharger 11 Controller
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F02B 69/06 F01L 9/02 F01L 13/06 F02D 13/04 F02M 47/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F02B 69/06 F01L 9/02 F01L 13/06 F02D 13/04 F02M 47/00
Claims (1)
気弁と掃気用の排気ターボ過給機とを備え、コントロー
ラにより前記油圧駆動燃料噴射弁の燃料噴射時期と、油
圧駆動吸，排気弁の開閉タイミングを制御して、高負荷
時には２サイクル運転に切換え、低負荷時には４サイク
ル運転に切換え可能とし、かつ圧縮行程終期で前記油圧
駆動排気弁を開口制御して圧縮圧力を開放しブレーキ作
動可能としたことを特徴とする内燃機関。 A hydraulically driven fuel injection valve and a hydraulically driven intake and exhaust valve.
Equipped with air valve and scavenging exhaust turbocharger,
The fuel injection timing of the hydraulically driven fuel injection valve and the oil
Controls the opening / closing timing of the pressure-driven intake and exhaust valves to achieve high load
Sometimes switched to 2-cycle operation, 4 cycles at low load
Operation at the end of the compression stroke.
Opening the drive exhaust valve to release the compression pressure and brake
An internal combustion engine characterized by being movable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6186814A JP3030365B2 (en) | 1994-07-18 | 1994-07-18 | Internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6186814A JP3030365B2 (en) | 1994-07-18 | 1994-07-18 | Internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0828295A JPH0828295A (en) | 1996-01-30 |
| JP3030365B2 true JP3030365B2 (en) | 2000-04-10 |
Family
ID=16195066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6186814A Expired - Fee Related JP3030365B2 (en) | 1994-07-18 | 1994-07-18 | Internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3030365B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6779506B1 (en) * | 2003-09-23 | 2004-08-24 | International Engine Intellectual Property Company, Llc | Engine brake control pressure strategy |
| KR100686447B1 (en) * | 2005-10-31 | 2007-02-26 | 현대중공업 주식회사 | 4 stroke diesel combustion engine driven by hydraulically actuated fuel pump, intake valve and exhaust valve |
| WO2017152997A1 (en) | 2016-03-11 | 2017-09-14 | Volvo Truck Corporation | A method for operating an internal combustion piston engine |
| CN107060942B (en) * | 2017-06-07 | 2019-04-09 | 大连理工大学 | A kind of compact multimode formula valve-driving system |
-
1994
- 1994-07-18 JP JP6186814A patent/JP3030365B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0828295A (en) | 1996-01-30 |
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