JPH02308920A - Sub-combustion chamber type heat insulated diesel engine - Google Patents
Sub-combustion chamber type heat insulated diesel engineInfo
- Publication number
- JPH02308920A JPH02308920A JP13032589A JP13032589A JPH02308920A JP H02308920 A JPH02308920 A JP H02308920A JP 13032589 A JP13032589 A JP 13032589A JP 13032589 A JP13032589 A JP 13032589A JP H02308920 A JPH02308920 A JP H02308920A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- sub
- nozzle hole
- diesel engine
- projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 63
- 239000000446 fuel Substances 0.000 abstract description 20
- 239000000779 smoke Substances 0.000 abstract description 12
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000000567 combustion gas Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical class [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吸気が旋回流となって流人する副燃焼室と主
燃焼室とが外部に対して断熱されている副燃焼室式断熱
ディーゼルエンジンに関する。Detailed Description of the Invention (Industrial Application Field) The present invention provides a sub-combustion chamber type heat insulating combustion chamber in which a sub-combustion chamber and a main combustion chamber, in which intake air flows in a swirling flow, are insulated from the outside. Regarding diesel engines.
（従来の技術）
従来のディーゼルエンンンでは、燃料の燃焼によって得
られる熱エネルギの内、約１／３程度がエンジン本体を
介して外部に伝達さね、エンジン出力に何ら寄与するこ
となく無為に廃棄されている。そこで、燃焼室内壁を熱
伝導率が小であり、耐熱性に優れたセラミックス等で被
覆し外部に対して燃焼室内を断熱することにより、燃料
の燃焼によって得られる熱エネルギを有効に利用しよう
とする断熱エンジンが提案されている。(Conventional technology) In conventional diesel engines, about 1/3 of the heat energy obtained by combustion of fuel is transmitted to the outside through the engine body, and is wasted without contributing to engine output. It has been discarded. Therefore, an attempt was made to effectively utilize the thermal energy obtained from the combustion of fuel by coating the combustion chamber walls with ceramics, etc., which have low thermal conductivity and excellent heat resistance, and insulating the inside of the combustion chamber from the outside. An adiabatic engine has been proposed.
（発明が解決しようとする課題）
このような断熱エンジンは燃焼室内の温度が通常のエン
ジンより高温度となるため、空燃比を変更しなければ排
気ガス中に含有される大気汚染物質である窒素酸化物（
以下ＮＯｘという）の屋か増加するという問題がある。(Problem to be solved by the invention) Since the temperature inside the combustion chamber of such an adiabatic engine is higher than that of a normal engine, unless the air-fuel ratio is changed, nitrogen, an air pollutant contained in the exhaust gas, will be removed. Oxide (
There is a problem of an increase in NOx (hereinafter referred to as NOx).
そこで、ＮＯｘを低減するため燃料供給量を増加させる
と、ＮＯｘは低減するが炭化水素、−酸化炭素（以下Ｈ
ＣｌＣ０という）及び黒煙の排出量が増加するという問
題がある。Therefore, if the fuel supply amount is increased to reduce NOx, NOx will be reduced, but hydrocarbons, carbon oxides (hereinafter referred to as H
There is a problem in that the amount of emissions of black smoke (called ClC0) and black smoke increases.
本発明は、上記の点に鑑みてなされたちので、ＮＯｘ、
ＨＣ’、Ｃｏ及び黒煙の１ノ１出量を低減することので
きる副燃焼室式断熱ディーゼルエンジンを提供しようと
するものである。The present invention has been made in view of the above points, so that NOx,
The object of the present invention is to provide a sub-combustion chamber type adiabatic diesel engine that can reduce the output of HC', Co, and black smoke.
（課題を解決するための手段）
本発明によれば、主燃焼室から旋回流入する吸気を旋回
流として保持する副燃焼室と、副燃焼室と主燃焼室間と
に連通し、主燃焼室からの旋回流を副燃焼室に導入する
噴孔と、ピストンヘラ）パ面に設けられ上死点近傍にて
該噴孔に進入し噴孔の開ｒｌｉｌｉｌｉｌｉ積を狭窄す
る突起と、ピストンヘッド面上の突起突出部周囲に刻設
された凹部どを有することを特徴とする副燃焼室式断熱
ディーゼルエンジンを提供できる。(Means for Solving the Problems) According to the present invention, a sub-combustion chamber that retains intake air swirlingly flowing in from the main combustion chamber as a swirling flow is in communication between the sub-combustion chamber and the main combustion chamber, and the main combustion chamber a nozzle hole that introduces a swirling flow from the nozzle into the auxiliary combustion chamber, a protrusion that is provided on the piston spatula surface and enters the nozzle hole near top dead center and narrows the opening area of the nozzle hole, and a piston head surface. It is possible to provide an auxiliary combustion chamber type adiabatic diesel engine characterized by having a recess carved around the upper protrusion.
（作用）
本発明の副燃焼室式断熱ディーゼルエンジンでは、燃料
に着火した後、所定期間燃焼カスを高温度状態に維持し
、燃焼が進行して空気に対する燃料の比率が低下すると
、急速に燃焼室内部の温度を降下させ、ＮＯｘ、ＨＣ，
Ｃｏ及び黒煙の排出量を低減させる。(Function) In the sub-combustion chamber type adiabatic diesel engine of the present invention, after the fuel is ignited, the combustion residue is maintained at a high temperature for a predetermined period of time, and as combustion progresses and the ratio of fuel to air decreases, the combustion occurs rapidly. Reduces indoor temperature and reduces NOx, HC,
Reduces Co and black smoke emissions.
（実施例）
以下、本発明の一実施例を図面に従って詳細に説明する
。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図は、本発明によるエンジンの構成を示すブロック
図である。FIG. 1 is a block diagram showing the configuration of an engine according to the present invention.
１は副燃焼室であり、該副燃焼室内壁はセラミックス等
からなる耐熱性断熱材のスリーブ１３により被覆されて
いる。該副燃焼室１には主燃焼室との連通口である噴孔
１２ど主及び副燃焼室１内の排気ガスを排出する排気口
とが設りられている。該排気口には、排気［１を開閉す
る排気バルブ１４が配設されている。また、副燃焼室１
の側部には該副燃焼室内に燃料を噴射するための噴射ノ
ズル１５が配設さねており、該噴射ノズル１５には燃料
を増圧し噴身」ノズル１５へ供給する燃料ポンプゴロが
１妾糸売され−Ｃいる。Reference numeral 1 denotes a sub-combustion chamber, and the inner wall of the sub-combustion chamber is covered with a sleeve 13 of a heat-resistant heat insulating material made of ceramics or the like. The auxiliary combustion chamber 1 is provided with a nozzle hole 12 which is a communication port with the main combustion chamber, and an exhaust port through which exhaust gas in the main and auxiliary combustion chamber 1 is discharged. An exhaust valve 14 for opening and closing the exhaust gas [1] is disposed at the exhaust port. In addition, the auxiliary combustion chamber 1
An injection nozzle 15 for injecting fuel into the auxiliary combustion chamber is disposed on the side of the auxiliary combustion chamber, and a fuel pump is provided in the injection nozzle 15 to increase the pressure of fuel and supply it to the injection nozzle 15. Yarn is sold-C.
上記副燃焼室１の下方には、副燃焼室１ど同しくセラミ
ックス等からなる耐熱性断熱材のシリンダスリーブ２１
によって内壁が被覆されたシリンダ２が連通している。Below the sub-combustion chamber 1 is a cylinder sleeve 21 made of heat-resistant heat insulating material made of ceramics or the like.
A cylinder 2 whose inner wall is covered with is in communication.
該シリンダスリーブ２１の下部には複数個の吸気口２２
が周設されている。A plurality of intake ports 22 are provided at the bottom of the cylinder sleeve 21.
are provided around the area.
該吸気口２２は傾斜しており、吸気口２２からシリンダ
２内へ吸入される吸気を旋回流とする。The intake port 22 is inclined, and the intake air drawn into the cylinder 2 from the intake port 22 is made into a swirling flow.
該シリンダ２内にはピストン３が往復自在に配設されて
いる。該ビス下部３のピストンヘッド面中央部には凹部
３１が刻設されており、該凹部３１の中心部から突起３
２が突設されている。該突起３２は上死点近傍にて上記
噴孔１２内に進入し、該噴孔１２の開口面積を狭窄する
。また、突起３２、凹部３１及びピストンヘッド面は、
セラミックス等からなる耐熱性断熱材にて形成さねてい
る。A piston 3 is disposed within the cylinder 2 so as to be able to reciprocate. A recess 31 is carved in the center of the piston head surface of the lower screw 3, and a protrusion 3 extends from the center of the recess 31.
2 is provided protrudingly. The protrusion 32 enters the nozzle hole 12 near the top dead center and narrows the opening area of the nozzle hole 12. In addition, the protrusion 32, the recess 31, and the piston head surface are
It is made of heat-resistant heat insulating material such as ceramics.
次に、本発明の作用について説明する。Next, the operation of the present invention will be explained.
第２図は、副燃焼室内部の燃焼ガスの流れを示す図であ
り、（ａ）は、上死点直前の状態を示し、（ｂ）は、上
死点直後の状態を示し、（Ｃ）は、ピストン降下途中の
状態を示す。FIG. 2 is a diagram showing the flow of combustion gas inside the auxiliary combustion chamber, in which (a) shows the state immediately before top dead center, (b) shows the state immediately after top dead center, and (C ) indicates the state in which the piston is in the middle of descending.
ピストン３の上昇に伴ないシリンダ２内部の旋回流はス
キッシュ流れどなって、副燃焼室１内部へと流入する。As the piston 3 rises, the swirling flow inside the cylinder 2 turns into a squish flow and flows into the sub-combustion chamber 1 .
該流入の際には、副燃焼室１の直径がシリンダ２の直径
より小であるため旋回流の旋回速度が加速さね、副燃焼
室１内部にはシリンダ円周方向に旋回する高速の旋回流
が発生する。At the time of the inflow, since the diameter of the sub-combustion chamber 1 is smaller than the diameter of the cylinder 2, the swirling speed of the swirl flow does not accelerate, and a high-speed swirl swirls in the circumferential direction of the cylinder inside the sub-combustion chamber 1. A flow occurs.
そして、該旋回流中に噴射ノズルコ５から噴射された燃
料は上死点直前で着火する。Then, the fuel injected from the injection nozzle 5 during the swirling flow ignites just before the top dead center.
（ａ）に示すごとく、着火後置燃焼室１内の旋回流中で
発生ずる燃焼ガスは膨張し未燃焼部分より低比重どなる
ので旋回流の遠心分離作用により該燃焼ガスは旋回流の
中心部へと集積する。該中心部は周辺部より低圧となっ
ているため、凹部３１の空気が突起３２により狭窄され
た噴孔１２から該中心部へと吸入され、該中心部での燃
焼かより促進される。よって、該流入空気量に相当する
空気溜すなわち凹部３１がなけわは黒煙の発生原因どな
る。As shown in (a), the combustion gas generated in the swirling flow in the post-ignition combustion chamber 1 expands and has a lower specific gravity than the unburned part, so the centrifugal separation action of the swirling flow causes the combustion gas to move to the center of the swirling flow. Accumulate into. Since the pressure in the center is lower than that in the periphery, air in the recess 31 is drawn into the center through the nozzle hole 12 narrowed by the protrusion 32, and combustion in the center is further promoted. Therefore, if there is no air pocket or recess 31 corresponding to the amount of incoming air, the black smoke will be generated.
次に、（ｂ）に示すごとく、上死点を紅過しビス］・ン
３の下降が開始すると、旋回流中心部の燃焼カスは主燃
焼室であるピストン２側へと１４１出される。該燃焼ガ
スは狭窄されている噴孔１２のノズル効果により高速流
となっているので凹部３１へと流入する。そして、該凹
部３１に残留している空気と攪拌混合され、未燃焼ガス
中の未燃焼部分が急速に燃焼し高温状態を維持する。よ
って、従来のエンジンでは燃焼カスが内壁により冷却さ
れ消炎する消炎部においても高温燃焼状態を維持するこ
とができる。Next, as shown in (b), when the top dead center is cleared and the screw 3 starts to descend, the combustion scum at the center of the swirling flow is discharged 141 to the piston 2 side, which is the main combustion chamber. The combustion gas flows into the recess 31 because it becomes a high-speed flow due to the nozzle effect of the narrowed nozzle hole 12 . Then, it is stirred and mixed with the air remaining in the recess 31, and the unburned portion of the unburned gas is rapidly combusted to maintain a high temperature state. Therefore, in the conventional engine, a high-temperature combustion state can be maintained even in the flame-extinguishing section where combustion scum is cooled by the inner wall and extinguished.
そして、（Ｃ）に示すごとく、ビスｌ−ン３がより下降
１ノ、突起３２が噴孔１２から離脱するど噴孔１２が開
放され副燃焼室１内部の燃焼ガスはシリンダ２へ急速に
拡散膨張するので燃焼ガスの温度も急速に低下する。Then, as shown in (C), the screw cylinder 3 descends further and the protrusion 32 separates from the nozzle hole 12, which opens the nozzle hole 12 and the combustion gas inside the auxiliary combustion chamber 1 rapidly flows into the cylinder 2. Due to the diffusion and expansion, the temperature of the combustion gas also decreases rapidly.
次に、燃焼室内温度と排出物どの関係について説明する
。Next, the relationship between combustion chamber temperature and emissions will be explained.
第３図は、燃焼行程の進行による燃焼室内温度と、混合
ガス中に含有させる燃料の比率の変化を示す図である。FIG. 3 is a diagram showing changes in the combustion chamber temperature and the ratio of fuel contained in the mixed gas as the combustion stroke progresses.
縦軸は燃料の比率φを示し、横軸は温度Ｔを示ず。そし
”Ｃ１左上の範囲はＨＣ，Ｃｏ及び黒煙の発生領域を示
し、右下の範囲はＮＯｘの発生領域を示す。The vertical axis shows the fuel ratio φ, and the horizontal axis does not show the temperature T. The upper left range of "C1" indicates the generation area of HC, Co, and black smoke, and the lower right range indicates the NOx generation area.
図に示す（Ａ）の曲線は従来のエンジンにおりる変化の
状態を示し、（Ｂ）の曲線は本願エンジンの変化を示す
。The curve (A) shown in the figure shows the state of change in the conventional engine, and the curve (B) shows the change in the engine of the present invention.
本願のエンジンは断熱エンジンであるため、従来エンジ
ンより高温側に移動するが、燃料比率を従来のエンジン
と同一どずねばＮＯｘの発生領域に侵入する。そこで、
燃料比率を増加させＮＯｘの発生領域への侵入を防止す
る。ところで、単に燃料比率の増加のみではＨＣ，Ｃ’
Ｏ及び黒煙の発生領域に侵入するので、着火後の高温状
態を従来のエンジンより長朋間維持し、燃料比率が低下
した後、急速に温度を低下させることによりＨＣ。Since the engine of the present application is an adiabatic engine, it moves to a higher temperature than a conventional engine, but if the fuel ratio is the same as that of a conventional engine, it enters the NOx generation region. Therefore,
The fuel ratio is increased to prevent NOx from entering the generation area. By the way, by simply increasing the fuel ratio, HC, C'
Since the engine enters the area where O2 and black smoke are generated, the high temperature state after ignition is maintained for a longer period of time than in conventional engines, and the temperature is rapidly lowered after the fuel ratio decreases.
ＣＯ及び黒煙の発生領域への侵入を防止する。Prevent CO and black smoke from entering the area where they are generated.
よって以上によりＨＣ，’Ｃｏ及び黒煙の発生領域及び
ＮＯｘの発生領域双方への侵入を回避することができる
。Therefore, as described above, it is possible to avoid intrusion into both the HC, 'Co and black smoke generation area and the NOx generation area.
以上本発明について説明したが、本発明の精神から逸れ
ないかぎりで、種々の異なる実施例は容易に構成できる
から、本発明は前記特許請求の範囲において記載した限
定以外、特定の実施例に制約されるものではない。Although the present invention has been described above, since various different embodiments can be easily constructed without departing from the spirit of the invention, the present invention is not limited to specific embodiments other than the limitations set forth in the claims. It is not something that will be done.
（発明の効果）
以上説明したように本発明によれば、燃料に右 □火し
た後、所定期間燃焼室内を高温度状態に維持し、燃焼が
進行して空気に対する燃料の比率が減少すると、急速に
燃焼室内部の温度を降下させることによりＮＯｘ、ＨＣ
，Ｃｏ及び黒煙の排出量が低減される副燃焼室式断熱デ
ィーゼルエンジンをｔ是イ共できる。(Effects of the Invention) As explained above, according to the present invention, after the fuel is ignited, a high temperature state is maintained in the combustion chamber for a predetermined period of time, and as combustion progresses and the ratio of fuel to air decreases, NOx and HC are reduced by rapidly lowering the temperature inside the combustion chamber.
It is possible to create an adiabatic diesel engine with a sub-combustion chamber in which emissions of Co, Co and black smoke are reduced.
第１図は、本発明によるエンジンの構成を示すブロック
図、第２図は、副燃焼室内部の燃焼ガスの流れを示す図
、第３図は、燃焼行程の進行による燃焼室内温度と、混
合ガス中に含有させる燃料の比率の変化を示す図である
。
１・・・副燃焼室、２・・・シリンダ、３・・・ピスト
ン、１２・・・噴孔、３１・・・凹部、３２・・・突起
。Fig. 1 is a block diagram showing the configuration of an engine according to the present invention, Fig. 2 is a diagram showing the flow of combustion gas inside the sub-combustion chamber, and Fig. 3 shows the temperature in the combustion chamber as the combustion stroke progresses, and the mixing It is a figure which shows the change of the ratio of the fuel contained in gas. DESCRIPTION OF SYMBOLS 1... Sub-combustion chamber, 2... Cylinder, 3... Piston, 12... Nozzle hole, 31... Recessed part, 32... Protrusion.
Claims (2)
持する副燃焼室と、副燃焼室と主燃焼室間とに連通し、
主燃焼室からの旋回流を副燃焼室に導入する噴孔と、ピ
ストンヘッド面に設けられ上死点近傍にて該噴孔に進入
し噴孔の開口面積を狭窄する突起と、ピストンヘッド面
上の突起突出部周囲に刻設された凹部とを有することを
特徴とする副燃焼室式断熱ディーゼルエンジン。(1) A sub-combustion chamber that retains intake air swirling in from the main combustion chamber as a swirling flow, communicating between the sub-combustion chamber and the main combustion chamber,
A nozzle hole that introduces the swirling flow from the main combustion chamber into the auxiliary combustion chamber, a protrusion provided on the piston head surface that enters the nozzle hole near top dead center and narrows the opening area of the nozzle hole, and a piston head surface A sub-combustion chamber type adiabatic diesel engine characterized by having a recess carved around the upper protrusion.
回流の旋回中心軸と一致することを特徴とする請求項（
１）記載の副燃焼室式断熱ディーゼルエンジン。(2) Claim (2) characterized in that the central axis of the nozzle hole coincides with the central axis of swirling of the swirling flow held in the sub-combustion chamber.
1) The auxiliary combustion chamber type adiabatic diesel engine described above.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130325A JP2620974B2 (en) | 1989-05-24 | 1989-05-24 | Secondary combustion chamber type insulated diesel engine |
| US07/514,842 US5025765A (en) | 1989-04-26 | 1990-04-26 | Heat-insulated four-cycle engine with prechamber |
| DE90304521T DE69003730T2 (en) | 1989-04-26 | 1990-04-26 | Heat-insulated four-stroke internal combustion engine with antechambers. |
| EP90304521A EP0395406B1 (en) | 1989-04-26 | 1990-04-26 | Heat-insulated four-stroke engine with prechamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130325A JP2620974B2 (en) | 1989-05-24 | 1989-05-24 | Secondary combustion chamber type insulated diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02308920A true JPH02308920A (en) | 1990-12-21 |
| JP2620974B2 JP2620974B2 (en) | 1997-06-18 |
Family
ID=15031649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1130325A Expired - Lifetime JP2620974B2 (en) | 1989-04-26 | 1989-05-24 | Secondary combustion chamber type insulated diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2620974B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10125666B2 (en) | 2016-01-14 | 2018-11-13 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
| US10927750B2 (en) | 2016-01-14 | 2021-02-23 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62501720A (en) * | 1985-01-29 | 1987-07-09 | ポ−ル，マリウス・エイ | heat-generating engine |
-
1989
- 1989-05-24 JP JP1130325A patent/JP2620974B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62501720A (en) * | 1985-01-29 | 1987-07-09 | ポ−ル，マリウス・エイ | heat-generating engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10125666B2 (en) | 2016-01-14 | 2018-11-13 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
| US10669926B2 (en) | 2016-01-14 | 2020-06-02 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
| US10927750B2 (en) | 2016-01-14 | 2021-02-23 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
| US11608773B2 (en) | 2016-01-14 | 2023-03-21 | Nautilus Engineering, Llc | Systems and methods of compression ignition engines |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2620974B2 (en) | 1997-06-18 |
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