JPS60261921A - Internal-combustion engine of in-cylinder injection type - Google Patents

Internal-combustion engine of in-cylinder injection type

Info

Publication number
JPS60261921A
JPS60261921A JP59115566A JP11556684A JPS60261921A JP S60261921 A JPS60261921 A JP S60261921A JP 59115566 A JP59115566 A JP 59115566A JP 11556684 A JP11556684 A JP 11556684A JP S60261921 A JPS60261921 A JP S60261921A
Authority
JP
Japan
Prior art keywords
fuel
cylinder head
fuel injection
section
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP59115566A
Other languages
Japanese (ja)
Inventor
Yutaka Tomita
裕 富田
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.)
Yamaha Marine Co Ltd
Original Assignee
Sanshin Kogyo 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 Sanshin Kogyo KK filed Critical Sanshin Kogyo KK
Priority to JP59115566A priority Critical patent/JPS60261921A/en
Publication of JPS60261921A publication Critical patent/JPS60261921A/en
Pending legal-status Critical Current

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
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
    • F02B19/165—The shape or construction of the pre-combustion chambers is specially adapted to be formed, at least in part, of ceramic material
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
    • F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
    • F02B23/105—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder the fuel is sprayed directly onto or close to the spark plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0085—Materials for constructing engines or their parts
    • F02F7/0087—Ceramic materials
    • 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
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To maintain the peripheral section of a combustion chamber in an appropriately cooled condition and to promote the evaporation of fuel, by forming a fuel injection area in the inner surface section of a cylinder head with heat accumulating materials. CONSTITUTION:A substantially center section of a fuel injection area in the inner surface section of a cylinder head 12, or a recessed section 12A is made of a ceramic heat accumulating material 28, and therefore, a high temperature condition may be maintained due to the accumulation of combustion heat upon operation of an engine 10. Although fuel injected from a fuel injection nozzle 21 is initially in such a condition that large and small liquid droplets are mingled therein, fuel impinging upon the ceramic heat accumulating material of the recessed section 12A is instantly evaporated due to heat in the heat accumulating material 28 and is ignited stably by an ignition plug 22. Further, the heat accumulating material 28 is formed in the recessed section 12A alone and is not used in the fringe section of the inner surface of the cylinder head 12, that is, the part where a squish area is formed is maintained in an appropriate cooled condition.

Description

【発明の詳細な説明】 ［技術分野］ 本発明は筒内噴射内燃−関に関する。[Detailed description of the invention] [Technical field] The present invention relates to a direct injection internal combustion engine.

［背景技術］ 筒内噴射内燃機関は、気化器を用いてなる内燃機関に比
して、燃料の気化に必要な時間を十分に確保することが
できず、また燃料を瞬時に気化することも困難である。[Background Art] Compared to internal combustion engines that use a carburetor, direct injection internal combustion engines cannot secure sufficient time for fuel vaporization, and cannot vaporize fuel instantaneously. Have difficulty.

そこで、上記筒内噴射内燃機関においては、燃焼室に噴
射され、大小の液滴が混在してなる燃料のうち、微粒化
燃料の藁が燃焼に供され、大きな液滴状の燃料は燃焼に
慎されることなく、燃焼室外に緋出され、燃焼状態を不
安定化するとともに、燃焼効率を阻害する恐れがある。Therefore, in the above-mentioned direct injection internal combustion engine, among the fuel injected into the combustion chamber and consisting of a mixture of large and small droplets, the atomized fuel straw is used for combustion, and the large droplet-shaped fuel is not combusted. If unchecked, the fuel may leak out of the combustion chamber, destabilizing the combustion state and impeding combustion efficiency.

また、上記筒内噴射内燃機関においては、シリンダブロ
ックとピストンとの焼付、ガソリン機関におけるノッキ
ングの発生を防止するために、燃焼室まわりを適正な冷
却状態に保つ必要がある。Furthermore, in the above-mentioned direct injection internal combustion engine, it is necessary to maintain the area around the combustion chamber in an appropriate cooling state in order to prevent seizure between the cylinder block and piston and occurrence of knocking in the gasoline engine.

［発明の目的］ 本発明は、燃焼室ま□わりを適正な冷却状態に保つとと
もに、燃料の気化を促進することを目的とする。[Object of the Invention] An object of the present invention is to maintain an appropriate cooling state around the combustion chamber and to promote vaporization of fuel.

［発明の構成］ Ｉ−記［目的を達成するために、本発明は、シリンダブ
ロックおよびシリンダヘッドの内面部分とピ　□ストン
の頂面部分とによって燃焼室を形成するとともに、シリ
ンダブロック側に燃料噴射ノズルを設け、燃料噴射ノズ
ルによる燃料噴射方向をシリンダヘッドの内面部分に向
けてなる筒内噴射内燃機関において、シリンダヘッドの
内面部分における燃料噴射領域を蓄熱材によって形成す
るようにしたものである。[Structure of the Invention] Section I [In order to achieve the object, the present invention provides a combustion chamber formed by a cylinder block, an inner surface portion of a cylinder head, and a top surface portion of a piston, and a combustion chamber in which fuel is supplied to the cylinder block side. In a direct injection internal combustion engine that is equipped with an injection nozzle and directs the fuel injection direction toward the inner surface of the cylinder head, the fuel injection area on the inner surface of the cylinder head is formed by a heat storage material. .

［発明の詳細な説明１ 第１図は本発明が適用されてなる２サイクル内燃機関ｌ
Ｏを示す模式図、第２図は同内燃機関１０の要部を示す
断面図である。[Detailed Description of the Invention 1 Figure 1 shows a two-stroke internal combustion engine to which the present invention is applied.
FIG. 2 is a cross-sectional view showing essential parts of the internal combustion engine 10.

機関１０は、シリンダブロック１１、シリンダヘッド１
２、クランクケース１３を有し、シリンダブロックｌｌ
に収容されるピストン１４の頂面側に燃焼室１５を形成
し、ピストン１４の背面側にクランク室１６を形成して
いる。The engine 10 includes a cylinder block 11 and a cylinder head 1.
2. It has a crankcase 13 and a cylinder block ll.
A combustion chamber 15 is formed on the top side of the piston 14 housed in the piston 14, and a crank chamber 16 is formed on the back side of the piston 14.

また、機関１０は、クランク室１６に連なり燃焼用空気
を導入可能とする吸気通路１７、クランク室１６と燃焼
室１５とを連通可能とする掃気通麺　路１８、燃焼室１
５に連なり既燃ガスを排出可能とする排気通路１９を備
えている。なお、２０はリード弁である。The engine 10 also includes an intake passage 17 that connects to the crank chamber 16 and allows introduction of combustion air, a scavenging passage 18 that allows communication between the crank chamber 16 and the combustion chamber 15, and a combustion chamber 1.
5 and is provided with an exhaust passage 19 that allows burnt gas to be discharged. Note that 20 is a reed valve.

また、機関１０はシリンダブロック１１に燃料噴射ノズ
ル２１を備えるとともに、シリンダヘッド１２の内面部
分に設けた凹部１２Ａの中央に点火栓２２を備え、燃料
噴射ノズル２１による燃料噴射方向をシリンダへ一２ド
１２の内面部分における点火栓２２まわりの部分に設け
ている。The engine 10 also includes a fuel injection nozzle 21 in the cylinder block 11, and a spark plug 22 in the center of a recess 12A provided in the inner surface of the cylinder head 12, so that the direction of fuel injection by the fuel injection nozzle 21 is directed toward the cylinder. It is provided in the area around the spark plug 22 on the inner surface of the door 12.

また、機関１０は、燃料タンク２３に連なる噴射ポンプ
２４を備えている。噴射ポンプ２４は、機関ｌＯの駆動
軸２５にベルト２６を介して連動可能に結合されるとと
もに、燃料供給管２７を介して燃料噴射ノズル２１に燃
料を圧送可能としている。The engine 10 also includes an injection pump 24 connected to a fuel tank 23. The injection pump 24 is operatively connected to the drive shaft 25 of the engine IO via a belt 26 and is capable of pumping fuel to the fuel injection nozzle 21 via a fuel supply pipe 27.

しかして、機関ｌＯは、シリンダヘッド１２の内面部分
における燃料噴射領域の略中央部、即ち四部１２Ａを形
成し′ている部分の表面を、コーティング処理されてな
るセラミック蓄熱材２８によって形成している。なお、
シリンダへラド１２の内面部分における上記セラミック
蓄熱材２８が形成されていない部分は、水ジャケット２
９をｌｉｉ環する冷却水によって適正な冷却状態に維持
可能とされている。Thus, in the engine IO, the surface of the approximately central portion of the fuel injection region on the inner surface of the cylinder head 12, that is, the portion forming the four portions 12A, is formed with the ceramic heat storage material 28 which is coated. . In addition,
The portion of the inner surface of the cylinder head 12 where the ceramic heat storage material 28 is not formed is the water jacket 2.
It is possible to maintain an appropriate cooling state by the cooling water circulating around 9.

次に、上記実施例の作動について説明する。Next, the operation of the above embodiment will be explained.

機関ｌＯにおいては、吸気通路１７からクランク室１６
に導入された燃焼用空気が、ピストン１４の下降行程に
おいて圧縮された後、掃気通路１８から燃焼室１５の内
部に流入し、既燃ガスを排気通路１９から追い出す、続
くピストン１４の上、昇行程においては、燃焼室１５の
内部に流入した燃焼用空気が圧縮されている状態下で、
噴射ポンプ２４によって圧送される燃料が燃料噴射ノズ
ル２１から燃焼室１５の内部に高圧噴射されるとともに
、点火栓２２が作動し、燃料の点火爆発が行われる。In the engine IO, from the intake passage 17 to the crank chamber 16
After the combustion air introduced into the piston 14 is compressed during the downward stroke of the piston 14, it flows into the combustion chamber 15 from the scavenging passage 18 and expels the burnt gas from the exhaust passage 19. During the stroke, while the combustion air that has flowed into the combustion chamber 15 is compressed,
The fuel pumped by the injection pump 24 is injected at high pressure into the combustion chamber 15 from the fuel injection nozzle 21, and the spark plug 22 is activated to ignite and explode the fuel.

しかして、この実施例においては、シリンダヘッド１２
の内面部分における燃料噴射領域の略中央部、すなわち
凹部１２Ａがセラミック蓄熱材２８によって形成され、
機関ｌＯの運転時に、燃焼熱の蓄熱によって高温度状態
を保持可能とされている。従って、燃料噴射ノズル２１
から噴射される燃料は、当初大小の液滴が混在してなる
状態であるものの、上記凹部１２Ａのセラミック蓄熱材
２８に衝突した燃料はセラミック蓄熱材２８の熱によっ
て瞬時に気化し１点火栓２２によって安定的に着火され
る。Therefore, in this embodiment, the cylinder head 12
Approximately the center of the fuel injection area on the inner surface of the fuel injection area, that is, the recess 12A is formed by the ceramic heat storage material 28,
During operation of the engine 1O, a high temperature state can be maintained by storing combustion heat. Therefore, the fuel injection nozzle 21
Initially, the fuel injected from the spark plug 22 is a mixture of large and small droplets, but the fuel that collides with the ceramic heat storage material 28 in the recess 12A is instantaneously vaporized by the heat of the ceramic heat storage material 28. ignites stably.

また、この実施例においては、セラミック蓄熱材２８が
形成されてなる凹部１２Ａの中央に点火栓２２を配置し
ていることから、点火栓２２は上記のようにして気化さ
れた高温度の燃料雰囲気中に位置することとなり、これ
によっても、点火栓２２による安定した燃焼状態を得る
事が可能となる。Furthermore, in this embodiment, since the ignition plug 22 is arranged in the center of the recess 12A in which the ceramic heat storage material 28 is formed, the ignition plug 22 is exposed to the high temperature fuel atmosphere vaporized as described above. This also makes it possible to obtain a stable combustion state using the ignition plug 22.

また、この実施例においては、セラミック蓄熱材２８が
シリンダヘッド１２の内面部分における四部１２Ａのみ
に形成され、セラミック蓄熱材２８がシリンダへラド１
２の内面の周辺部分、即ちスキッシュエリアを形成する
部分には何ら形成されず、スキッシュエリアを形成する
部分は適正な冷却状態を保持されることから、シリンダ
へラド１２の内面部分に温度勾配を形成し、ノッキング
の発生を確実に防止することが可能となる。Further, in this embodiment, the ceramic heat storage material 28 is formed only on the four parts 12A of the inner surface of the cylinder head 12, and the ceramic heat storage material 28 is formed on the cylinder head 12A.
Since nothing is formed on the peripheral portion of the inner surface of the cylinder 2, that is, the portion forming the squish area, and the portion forming the squish area is maintained in an appropriate cooling state, a temperature gradient is created on the inner surface of the Rad 12 to the cylinder. This makes it possible to reliably prevent the occurrence of knocking.

また、この実施例においては、上述のように、セラミッ
ク蓄熱材２８が凹部１２Ａのみに形成され、機関１０の
燃焼室１５を形成している他の部分には何ら形成されな
いことから、燃焼室１５のまわりの冷却能力を適正状態
に維持し、シリンダブロック１１とピストン１４との焼
付発生等を防止可能である。Furthermore, in this embodiment, as described above, the ceramic heat storage material 28 is formed only in the recess 12A and is not formed in any other part forming the combustion chamber 15 of the engine 10. The cooling capacity around the cylinder block 11 and the piston 14 can be maintained in an appropriate state, and seizure between the cylinder block 11 and the piston 14 can be prevented.

なお、上記実施例は、シリンダヘッド１２の内面部分に
おける燃料噴射領域の略中央部を蓄熱材２８によって形
成した。しかしながら、本発明は、シリンダヘッドの内
面部分における燃料噴射領域の全面を蓄熱材によって形
成するｔのとし又もよく、この場合には、噴射燃料をよ
り効果的に気化することが可能である。なお、この場合
にも、ピストン側を蓄熱材によって形成していないこと
から、ノッキングの発生を防止することが可能である。In the above embodiment, the approximate center of the fuel injection region on the inner surface of the cylinder head 12 is formed of the heat storage material 28. However, in the present invention, the entire fuel injection region on the inner surface of the cylinder head may be formed of a heat storage material, and in this case, it is possible to vaporize the injected fuel more effectively. Note that in this case as well, since the piston side is not formed of a heat storage material, it is possible to prevent knocking from occurring.

−なお、上記実施例は本発明を２サイクル内燃機関に適
用する場合について説明した。しかしながら、本発明は
、点火栓を備える４サイクル内燃機関、点火栓を備える
ことのないディーゼル機関等の他の機関にも広く適用可
能である。- In the above embodiments, the present invention is applied to a two-stroke internal combustion engine. However, the present invention is widely applicable to other engines such as four-stroke internal combustion engines equipped with a spark plug and diesel engines not equipped with a spark plug.

［発明の効果］ 以りのように、本発明は、シリンダブロックおよびシリ
ンダヘッドの内面部分とピストンの頂面部分とによって
燃焼室を形成するとともに、シリンダブロック側に燃料
噴射ノズルを設け、燃料噴射ノズルによる燃料噴射方向
をシリンダヘッドの内面部分に向けてなる筒内噴射内燃
機関において、シリンダヘッドの内面部分における燃料
噴射領域を蓄熱材によって形成するようにしたものであ
る。従って、シリンダヘッドの内面部分のみを蓄熱材に
よって形成するものであることから、燃焼室まわりを適
正な冷却状態に保つことが可能である。また、燃料噴射
ノズルから噴射され、シリンダヘッドの内面部分に達し
た燃料は、蓄熱材に蓄熱されている熱によって確実に気
化を促進され、安定した燃焼状態を得るとともに、燃焼
効率を向Ｉ−することが可能となる。　（[Effects of the Invention] As described above, the present invention forms a combustion chamber by the cylinder block, the inner surface of the cylinder head, and the top surface of the piston, and also provides a fuel injection nozzle on the cylinder block side to inject fuel. In a cylinder injection internal combustion engine in which the direction of fuel injection by a nozzle is directed toward the inner surface of a cylinder head, the fuel injection region on the inner surface of the cylinder head is formed by a heat storage material. Therefore, since only the inner surface of the cylinder head is formed of the heat storage material, it is possible to maintain the area around the combustion chamber in an appropriate cooling state. In addition, the fuel injected from the fuel injection nozzle and reaching the inner surface of the cylinder head is reliably vaporized by the heat stored in the heat storage material, achieving a stable combustion state and improving combustion efficiency. It becomes possible to do so. (

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

第１図は本発明が適用されてなる内項機関の一例示す模
式図、第２図は同内燃機関１０の要部を示す断面図であ
る。 ｌＯ・・・内燃機関、１１・・・シリンダブロック、１
２・・・シリンダヘッド、１４・・・ピストン、１５・
・・燃焼室、２１・・・燃料噴射ノズル、２２・・・点
火栓、２８・・・蓄熱材。 代理人　弁理士　塩　川　修　治 −第１図 第２図 ９） 手続補正書（自船 昭和５８年＋ｏ　月２３．８ 特許庁長官　志賀学殿 １、事件の表示 昭和５８年特許願第１１５５８８号 ２、発明の名称 筒内噴射内燃機関 ３、補正をする者 事件との関係　特許出願人 名　称　三信工業株式会社 ４、代理人　〒１０５ 住　所　東京都港区虎）門−丁１」２３番７号第２３森
ビル　８階 ５、補正の対象 〜　明細書の特許請求の範囲の欄・発明の詳細な説明の
欄、図面の簡単な説明の柵、および図面６、補正の内容 （１）特許請求の範囲を別紙の通り改める。 （２）明細書第２頁第１９行の［シリンダブロック側に
］を削る。 （３）ＩＪ１１細書第７頁第１６行と同第１７行の間に
以下の文章を加える。 「　第３図は本発明が適用されてなる？サイクル内燃機
関３０の要部を示す断面図、第４図は第３図のＩＶ−Ｉ
Ｖ線に沿う略断面図である０機関３０は、シリンダブロ
ック３１、シリンダヘッド３２を有し、シリンダブロッ
ク３１に収容されるピストン３３の頂面側に燃焼室３４
を形成している。 また、機関３０は、掃気通路３５Ａ、３５Ｂおよび補助
掃気道路３５Ｃ１排気通路３６を備えている。 また、機関３０は、シリンダヘッド３２の凹部３２Ａに
、燃料噴射ノズル３７を備えるとともに、点火栓３８を
備え、燃料噴射ノズル３７にょ　ｉる′燃料噴射方向を
点火栓３８に向けている。 しかして１機関３０は、シリンダへラド３２の内面部分
における点火栓３８のまわりの部分の表面を、コーティ
ング処理されてなるセラミック蓄熱材３９によって形成
していや。なお、シリンダへラド３２の内面部分におけ
る上記セラミック蓄熱材３９が形成されていない部分は
、水ジャケット４０を循環する冷却水によって適正な冷
却状態に維持可能とされている。 しかして、この実施例においては、シリンダへラド３２
の内面部分の、燃料噴射ノズル３７が燃料を噴射する点
火栓３８のまわりがセラミック蓄熱材３９によって形成
され、機関３０の運転時に、燃焼熱の蓄熱によって高温
度状態を保持可能とされている。従って、燃料噴射ノズ
ル３７から噴射される燃料は、当初大小の液滴が混在し
てなる状態であるものの、上記セラミック蓄熱材３９に
衝突した燃料は該セラミック蓄熱材３９の熱によって瞬
時に気化し１点火栓３８によって直ちに安定的に着火さ
れる。 また、この実施例においては、セラミック蓄熱材３９が
シリンダヘッド３２の内面部分におけるシリンダヘッド
３２のまわりのみに形成され。 セラミック蓄熱材３９がシリンダヘッド３２の内面の周
辺部分、即ちスキッシュエリアを形成する部分には何ら
形成されず、スキッシュエリアを形成する部分は適正な
冷却状態を保持されることから、シリンダへラド３２の
内面部分に温度勾配を形成し、ノッキングの発生を確実
に防止することが可能となる・ また、この実施例においては、上述のように、セラミッ
ク蓄熱材３９がシリンダヘッド３２の内面部分における
点火栓３８のまわりのみに形成され、機関３０の燃焼室
３４を形成している他の部分には何ら形成されないこと
から、燃焼室３４のまわりの冷却能力を適正状態に維持
し、シリンダブロック３１とピストン３３との焼付発生
等を防１１・可能である。 ｆｔＳ５ｒｇ４は本発明が適用されてなるディーゼル機
関５０の要部を示す断面図、第６図は第５図のＶＩ−Ｖ
Ｉ線に沿う略断面図である。 機関５０は、シリンダブロック５１およびシリンダヘッ
ド５２の内面部分とピストン５３の表面部分とによって
燃焼室５４を形成し、燃料を噴射する燃料噴射ノズル５
６を備えている。なお、５７は吸気ボート、５８は排気
ボート、５９は吸気弁、６０は水ジャケットである。 しかして、機関５０は、シリンダへラド５２の内面部分
における燃料噴射領域に対応する部分の表面を、コーテ
ィング処理されてなるセラミック蓄熱材６１によって形
成している。 従って、この機関５０にあっても、燃料噴射ノズル５６
が噴射する燃料は、セラミック蓄熱材６１に向けて噴射
された後、瞬時に気化され、点火栓５５によって安定的
に着火される。 また、燃料室５４のまわりの冷却能力を適正状態に維持
し、シリンダブロック５１とピストン５３との焼付発生
等を防止可能である。」（４）明細書第７頁第１７行〜
第８頁第１行の「なお・・・広く適用可能である。」を
、「以上のように、本発明は、２サイクル内燃機関、４
サイクル内燃機関１点火栓を備えることのないディーゼ
ル機関等に広く適用可能である。」に改める。 （５）明細書第８頁第５行〜同第６行の「シリンダブロ
ック側に」を削る。 （６）明細書第９頁第２行の「断面図」を、「断面図、
第３図は本発明が適用されてなる他の内燃機関の要部を
示す断面図、第４図は第３図のＩＶ−ＩＶ線に沿う断面
図、第５図は本発明が適用されてなる他の内燃機関を示
す断面図、第６図は第５図のＶＩ−ＶＩ線に沿う断面図
」に改める。 （７）明細書第９頁第３行〜同第６行の「ｌＯ・・・蓄
熱材、」を、ｒｌＯ１３０，５０・・・機関、１１．３
１．５１・・・シリンダブロック、１２．３２．５２・
・・シリンダヘッド、１４．３３．５３・・・ピストン
、１５．３４．５４・・・燃焼室、２１．３７．５６・
・・燃料噴射ノズル、２２．３８・・・点火栓、２８．
３９．６１・・・蓄熱材、」に改める。　（ （８）別紙の第３図、第４図、第５図および第６図を加
える。 特許請求の範囲 （１）シリンダブロックおよびシリンダヘッドの内面部
分とピストンの頂面とによって１１１土」るとと　に、
　ノズル　”け、燃料噴 射ノズルによる燃料噴射方向をシリンダヘッドの内面部
分に向けてなる筒内噴射内燃機関におｌ、Ｎて、シリン
ダヘッドの内面部分における燃料噴射領域を蓄熱材によ
って形成したことを特徴とする筒内噴射内燃機関。FIG. 1 is a schematic diagram showing an example of an internal combustion engine to which the present invention is applied, and FIG. 2 is a sectional view showing a main part of the internal combustion engine 10. As shown in FIG. lO... Internal combustion engine, 11... Cylinder block, 1
2... Cylinder head, 14... Piston, 15.
... Combustion chamber, 21... Fuel injection nozzle, 22... Spark plug, 28... Heat storage material. Agent Patent attorney Osamu Shiokawa - Figure 1, Figure 2, Figure 9) Procedural amendment (Own ship 1980 + o, 23.8) Commissioner of the Japan Patent Office Manabu Shiga 1, Indication of case Patent Application No. 115588 of 1982 2. Name of the invention Direct injection internal combustion engine 3. Relationship with the case of the person making the amendment Patent applicant name: Sanshin Kogyo Co., Ltd. 4, Agent: 105 Address: 23-7 Toramon-cho 1, Minato-ku, Tokyo No. 23 Mori Building 8th floor 5, Subject of amendment ~ Claims section of the specification/Detailed description of the invention section, Brief explanation of the drawing fence, and Drawing 6, Contents of amendment (1) Patent The scope of claims is revised as shown in the attached sheet. (2) Delete [toward the cylinder block side] on page 2, line 19 of the specification. (3) Add the following sentence between page 7, line 16 and line 17 of IJ11 Specification. 3 is a sectional view showing the main parts of a cycle internal combustion engine 30 to which the present invention is applied, and FIG. 4 is a sectional view taken along IV-I of FIG.
The engine 30, which is a schematic cross-sectional view taken along the V line, has a cylinder block 31, a cylinder head 32, and a combustion chamber 34 on the top side of a piston 33 accommodated in the cylinder block 31.
is formed. Further, the engine 30 includes scavenging passages 35A, 35B and an auxiliary scavenging passage 35C1 exhaust passage 36. The engine 30 also includes a fuel injection nozzle 37 in the recess 32A of the cylinder head 32, and also includes a spark plug 38, with the fuel injection direction of the fuel injection nozzle 37 directed toward the spark plug 38. Thus, in the engine 30, the surface of the inner surface of the cylinder head 32 around the spark plug 38 is formed of a ceramic heat storage material 39 which is coated. Note that the portion of the inner surface of the cylinder head 32 where the ceramic heat storage material 39 is not formed can be maintained in an appropriate cooling state by the cooling water circulating in the water jacket 40. Therefore, in this embodiment, the cylinder rad 32
A ceramic heat storage material 39 is formed around the ignition plug 38 through which the fuel injection nozzle 37 injects fuel on the inner surface of the engine 30, so that a high temperature state can be maintained by storing combustion heat when the engine 30 is operating. Therefore, although the fuel injected from the fuel injection nozzle 37 is initially a mixture of large and small droplets, the fuel that collides with the ceramic heat storage material 39 is instantly vaporized by the heat of the ceramic heat storage material 39. 1 spark plug 38 immediately and stably ignites. Further, in this embodiment, the ceramic heat storage material 39 is formed only around the cylinder head 32 on the inner surface of the cylinder head 32. No ceramic heat storage material 39 is formed on the peripheral portion of the inner surface of the cylinder head 32, that is, the portion forming the squish area, and the portion forming the squish area is maintained in an appropriate cooling state. This makes it possible to reliably prevent the occurrence of knocking by forming a temperature gradient on the inner surface of the cylinder head 32.In addition, in this embodiment, as described above, the ceramic heat storage material 39 prevents ignition on the inner surface of the cylinder head 32. Since it is formed only around the plug 38 and is not formed in any other part forming the combustion chamber 34 of the engine 30, the cooling capacity around the combustion chamber 34 can be maintained in an appropriate state, and the cylinder block 31 and It is possible to prevent the occurrence of seizure with the piston 33. ftS5rg4 is a sectional view showing the main parts of a diesel engine 50 to which the present invention is applied, and FIG. 6 is VI-V in FIG.
It is a schematic cross-sectional view along the I line. The engine 50 includes a combustion chamber 54 formed by inner surfaces of a cylinder block 51 and a cylinder head 52, and a surface portion of a piston 53, and a fuel injection nozzle 5 for injecting fuel.
It is equipped with 6. Note that 57 is an intake boat, 58 is an exhaust boat, 59 is an intake valve, and 60 is a water jacket. Thus, in the engine 50, the surface of a portion of the inner surface of the cylinder Radius 52 corresponding to the fuel injection area is formed with a ceramic heat storage material 61 which is coated. Therefore, even in this engine 50, the fuel injection nozzle 56
The fuel injected is instantaneously vaporized after being injected toward the ceramic heat storage material 61, and is stably ignited by the ignition plug 55. Further, it is possible to maintain the cooling capacity around the fuel chamber 54 in an appropriate state and prevent seizure between the cylinder block 51 and the piston 53. (4) Specification, page 7, line 17~
In the first line of page 8, ``It is widely applicable.'' was replaced with ``As described above, the present invention is applicable to two-cycle internal combustion engines, four-cycle internal combustion engines,
It is widely applicable to cycle internal combustion engines, such as diesel engines that are not equipped with a spark plug. ”. (5) Delete "toward the cylinder block side" from lines 5 to 6 on page 8 of the specification. (6) "Cross-sectional view" on page 9, line 2 of the specification is replaced with "cross-sectional view,"
FIG. 3 is a sectional view showing the main parts of another internal combustion engine to which the present invention is applied, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is a sectional view to which the present invention is applied. 6 is a sectional view taken along line VI-VI in FIG. 5. (7) "lO...heat storage material," on page 9, line 3 to line 6 of the specification, is replaced with rlO130,50...engine, 11.3
1.51...Cylinder block, 12.32.52.
・・Cylinder head, 14.33.53・・Piston, 15.34.54・・Combustion chamber, 21.37.56・
... Fuel injection nozzle, 22.38 ... Spark plug, 28.
39.61...Thermal storage material.'' ((8) Add attached Figures 3, 4, 5, and 6. Claims (1) The cylinder block, the inner surface of the cylinder head, and the top surface of the piston. Toto ni,
``Nozzle'' refers to a direct injection internal combustion engine in which the direction of fuel injection by the fuel injection nozzle is directed toward the inner surface of the cylinder head, and the fuel injection area on the inner surface of the cylinder head is formed by a heat storage material. Features a direct injection internal combustion engine.

Claims (1)

【特許請求の範囲】[Claims] （１）シリンダブロックおよびシリンダヘッドの内面部
分とピストンの頂面部分とによって燃焼室を形成すると
ともに、シリンダブロック側に燃料、噴射ノズルを、設
け、燃料噴射ノズルによる燃料噴射方向をシリンダヘッ
ドの内面部分に向けてなる筒内噴射内燃機関において、
シリンダヘッドの内百一部分における燃料噴射領域を蓄
、熱材によって形成した。ことを特徴とする筒内噴射内
燃機関。(1) A combustion chamber is formed by the cylinder block, the inner surface of the cylinder head, and the top surface of the piston, and a fuel injection nozzle is provided on the cylinder block side, so that the direction of fuel injection by the fuel injection nozzle is directed to the inner surface of the cylinder head. In a direct injection internal combustion engine,
The fuel injection area in one hundred and one parts of the cylinder head was formed by storing and heating material. A direct injection internal combustion engine characterized by:
JP59115566A 1984-06-07 1984-06-07 Internal-combustion engine of in-cylinder injection type Pending JPS60261921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59115566A JPS60261921A (en) 1984-06-07 1984-06-07 Internal-combustion engine of in-cylinder injection type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59115566A JPS60261921A (en) 1984-06-07 1984-06-07 Internal-combustion engine of in-cylinder injection type

Publications (1)

Publication Number Publication Date
JPS60261921A true JPS60261921A (en) 1985-12-25

Family

ID=14665722

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59115566A Pending JPS60261921A (en) 1984-06-07 1984-06-07 Internal-combustion engine of in-cylinder injection type

Country Status (1)

Country Link
JP (1) JPS60261921A (en)

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