JP2000179344A - Carbon adhesion preventing structure of combustion chamber of internal combustion engine - Google Patents
Carbon adhesion preventing structure of combustion chamber of internal combustion engineInfo
- Publication number
- JP2000179344A JP2000179344A JP10353072A JP35307298A JP2000179344A JP 2000179344 A JP2000179344 A JP 2000179344A JP 10353072 A JP10353072 A JP 10353072A JP 35307298 A JP35307298 A JP 35307298A JP 2000179344 A JP2000179344 A JP 2000179344A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- combustion
- titanium oxide
- carbon
- oxide coatings
- 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- Withdrawn
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
- 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
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/02—Surface coverings of combustion-gas-swept parts
-
- 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
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
- F02F3/12—Pistons having surface coverings on piston heads
-
- 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)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、内燃機関の燃焼室
構成面、例えばシリンダヘッドの燃焼凹部内面，ピスト
ン頂面にカーボンが付着するのを防止するための構造に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing carbon from adhering to a surface of a combustion chamber of an internal combustion engine, for example, an inner surface of a combustion recess of a cylinder head and a top surface of a piston.
【０００２】[0002]
【従来の技術】内燃機関の燃焼では不完全燃焼した炭化
水素がカーボンとして発生する。そのほとんどは排気ガ
スと共に排出されるが、一部は燃焼室の内壁に付着し残
留する。一旦付着したカーボンは燃焼室の壁面温度では
酸化されずに滞留することになる。2. Description of the Related Art In combustion of an internal combustion engine, incompletely combusted hydrocarbons are generated as carbon. Most of them are exhausted together with the exhaust gas, but some adhere to the inner wall of the combustion chamber and remain. The carbon once adhered stays without being oxidized at the wall temperature of the combustion chamber.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上述の付着
したカーボンは、その後、筒内に噴射された燃料を一旦
吸収し、排気行程でその残留分を未燃焼ガス（ＨＣ）と
して排出し、排ガス中のＨＣ増加の要因となる。However, the carbon deposited above absorbs the fuel injected into the cylinder once, and discharges the residue as unburned gas (HC) in the exhaust stroke, thereby producing exhaust gas. It causes the increase of HC in the medium.
【０００４】また特に、筒内直噴内燃機関の場合は、そ
の燃焼性能が燃料噴霧の形態に直接的に依存するが、イ
ンジェクタ先端へのカーボン付着は、上記燃料噴霧の微
粒化に悪影響を与える。従って筒内直噴内燃機関では上
記インジェクタ先端へのカーボン付着を未然に防ぐ必要
がある。In particular, in the case of an in-cylinder direct injection internal combustion engine, the combustion performance directly depends on the form of the fuel spray. However, the adhesion of carbon to the tip of the injector adversely affects the atomization of the fuel spray. . Therefore, in a direct injection internal combustion engine, it is necessary to prevent carbon from adhering to the tip of the injector.
【０００５】本発明は、上記従来の状況に鑑みてなされ
たもので、燃焼室構成面へのカーボン付着を防止できる
内燃機関の燃焼室のカーボン付着防止構造を提供するこ
とを目的としている。The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a structure for preventing carbon deposition in a combustion chamber of an internal combustion engine, which can prevent carbon deposition on a combustion chamber constituting surface.
【０００６】[0006]
【課題を解決するための手段】本発明は、シリンダボア
内周面を除く燃焼室構成面に酸化チタン皮膜を形成した
ことを特徴としている。The present invention is characterized in that a titanium oxide film is formed on the surface of the combustion chamber except for the inner peripheral surface of the cylinder bore.
【０００７】[0007]
【発明の作用効果】一般に、ｎ型半導体である酸化チタ
ンは、そのバンドギャップエネルギーよりも大きなエネ
ルギーを有する光（主に４００ｎｍより波長の短い紫外
線光）が照射されると、光触媒効果により価電子帯から
導電帯へ電子が励起され、価電子帯に正孔が生成する。
この正孔, またそれによって発生するＯＨ等のラジカル
によってカーボンおよびカーボンと燃焼室壁面の接着剤
となっているオイルを酸化し炭酸ガスにすることができ
る。In general, when titanium oxide, which is an n-type semiconductor, is irradiated with light having an energy larger than its band gap energy (mainly, ultraviolet light having a wavelength shorter than 400 nm), valence electrons are generated by a photocatalytic effect. Electrons are excited from the band to the conduction band, and holes are generated in the valence band.
The holes and radicals such as OH generated by the holes can oxidize carbon and carbon and oil serving as an adhesive on the wall surface of the combustion chamber into carbon dioxide gas.
【０００８】一方、内燃機関の燃焼室内の火炎発光スペ
クトルには、完全混合燃焼では、４００ｎｍ以下の紫外
線領域の燃焼発光スペクトルが存在することが、例えば
第１３回内燃機関シンポジウムで報告されている。On the other hand, it has been reported in the thirteenth symposium on internal combustion engines, for example, that the flame emission spectrum in the combustion chamber of an internal combustion engine has a combustion emission spectrum in the ultraviolet region of 400 nm or less in perfect mixed combustion.
【０００９】本発明に係る内燃機関の燃焼室のカーボン
付着防止構造によれば、内燃機関の燃焼室構成面（シリ
ンダーヘッド内面, ピストン頂面及び吸排気バルブ, 点
火プラグ, インジェクターの燃焼室内に臨む部分等）に
酸化チタン皮膜を配したので、該酸化チタン皮膜が燃焼
で発する紫外線で励起され、付着したカーボンおよび接
着剤となっっているオイルを酸化分解して二酸化炭素に
することからカーボンを燃焼室外に排出できる。According to the structure for preventing carbon deposition in the combustion chamber of the internal combustion engine according to the present invention, the combustion chamber constituting surface of the internal combustion engine (the inner surface of the cylinder head, the top surface of the piston and the intake / exhaust valve, the spark plug, and the combustion chamber of the injector face the combustion chamber). Part), the titanium oxide film is excited by the ultraviolet rays emitted by the combustion, and oxidizes and decomposes the attached carbon and the oil used as an adhesive to carbon dioxide. Can be discharged outside the combustion chamber.
【００１０】ここで酸化チタンの光触媒効果は、酸化チ
タンが４００℃以上になると結晶状態が変化して機能が
低下すると言われているが、上記燃焼室構成面は冷却効
果で４００℃以下に保たれているため、劣化の心配はな
い。Here, it is said that the photocatalytic effect of titanium oxide changes its crystal state and deteriorates its function when the temperature exceeds 400 ° C., but the surface of the combustion chamber is kept at 400 ° C. or lower by a cooling effect. There is no need to worry about deterioration because it is dripped.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて説明する。図１, ２は、本発明の一実施
形態による内燃機関燃焼室のカーボン付着防止構造を説
明するための図であり、図１は上記内燃機関（エンジ
ン）の断面側面図、図２は燃焼による火炎発光の分光分
析を示す図である。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are views for explaining a structure for preventing carbon adhesion in a combustion chamber of an internal combustion engine according to one embodiment of the present invention. FIG. 1 is a sectional side view of the internal combustion engine (engine), and FIG. It is a figure which shows the spectral analysis of a flame emission.
【００１２】図１において、１は４サイクルエンジンを
示し、該エンジン１はクランクケース（図示せず）上に
シリンダ２，シリンダヘッド７を積層結合したものであ
る。該シリンダ２に形成されたシリンダボア６にはピス
トン９が上下方向に摺動自在に挿入配置され、該ピスト
ン９はクランク軸に連接棒１０により連結されている。In FIG. 1, reference numeral 1 denotes a four-cycle engine. The engine 1 has a cylinder 2 and a cylinder head 7 which are stacked and connected on a crankcase (not shown). A piston 9 is inserted into a cylinder bore 6 formed in the cylinder 2 so as to be slidable in a vertical direction, and the piston 9 is connected to a crankshaft by a connecting rod 10.
【００１３】上記シリンダヘッド７の下面には燃焼凹部
７ａが凹設されており、該燃焼凹部７ａとピストン９の
頂面９ａとシリンダボア６の内周面とで囲まれた部分に
より燃焼室１１が形成されている。A combustion recess 7a is provided on the lower surface of the cylinder head 7, and a combustion chamber 11 is defined by a portion surrounded by the combustion recess 7a, the top surface 9a of the piston 9, and the inner peripheral surface of the cylinder bore 6. Is formed.
【００１４】上記シリンダヘッド７には、上記燃焼室１
１を該シリンダヘッド７の外部に連通させる吸気通路１
３が形成されており、該吸気通路１３の下流端には上記
燃焼凹部７ａに開口する吸気弁開口１４が設けられてい
る。また、上記シリンダヘッド７には、上記燃焼室１１
を上記シリンダヘッド７の外部に連通させる排気通路１
６が形成されており、該排気通路１６の下流端には燃焼
凹部７ａに開口する排気弁開口１７が設けられている。The cylinder head 7 includes the combustion chamber 1
1 that communicates with the outside of the cylinder head 7
An intake valve opening 14 is provided at a downstream end of the intake passage 13 so as to open to the combustion recess 7a. The cylinder head 7 has the combustion chamber 11
Exhaust passage 1 that communicates with the outside of the cylinder head 7
An exhaust valve opening 17 is provided at the downstream end of the exhaust passage 16 so as to open to the combustion recess 7a.
【００１５】また、上記シリンダヘッド７には、上記吸
気弁開口１４を開閉する吸気弁１９と、上記排気弁開口
１７を開閉する排気弁２１とが各々配設されており、ま
たシリンダヘッド７の上面には上記吸気弁１９, 排気弁
２１を動作させる動弁機構（図示せず）が設けられてい
る。The cylinder head 7 has an intake valve 19 for opening and closing the intake valve opening 14 and an exhaust valve 21 for opening and closing the exhaust valve opening 17. A valve operating mechanism (not shown) for operating the intake valve 19 and the exhaust valve 21 is provided on the upper surface.
【００１６】上記シリンダヘッド７には、上記燃焼室１
１内に燃料２５を直接噴射供給する燃料噴射弁２６が吸
気通路１３下側に位置するように配設されている。ま
た、上記シリンダヘッド７の略シリンダ軸線３上に点火
プラグ５１が螺挿されている。ここで上記燃焼凹部６
ａ，ピストン頂面９ａ，吸気，排気弁１９，２１の傘部
１９ａ，２１ａの下面、燃焼噴射弁２６の先端部２６ａ
及び点火プラグ５１の電極部５１ａが本発明の燃焼室構
成面となっている。The cylinder head 7 has the combustion chamber 1
A fuel injection valve 26 for directly injecting fuel 25 into the fuel cell 1 is disposed below the intake passage 13. An ignition plug 51 is screwed into the cylinder head 7 substantially on the cylinder axis 3. Here, the combustion recess 6
a, piston top surface 9a, lower surfaces of umbrella portions 19a, 21a of intake and exhaust valves 19, 21, tip end portion 26a of combustion injection valve 26
The electrode portion 51a of the ignition plug 51 constitutes the combustion chamber constituting surface of the present invention.
【００１７】そして、エンジン１の運転時には、吸気弁
開口１４が開かれて、上記吸気通路１３を通して外部の
空気５５が上記燃焼室１１に吸入される。また、上記燃
焼室１１に、上記燃料噴射弁２６から燃料２５が噴射さ
れ、この燃料２５と上記空気５５とが混合して混合気５
４が生成され、該混合気５４の燃焼による動力がランク
軸を介して出力される。また、上記燃焼により生じた燃
焼ガスは、上記各排気弁開口１７が開かれる排気行程に
おいて排気５６として上記排気通路１６を通って外部に
排出される。During operation of the engine 1, the intake valve opening 14 is opened, and external air 55 is sucked into the combustion chamber 11 through the intake passage 13. Further, fuel 25 is injected from the fuel injection valve 26 into the combustion chamber 11, and the fuel 25 and the air 55 mix to form an air-fuel mixture 5.
4 is generated, and the power of the combustion of the air-fuel mixture 54 is output via the rank shaft. Further, the combustion gas generated by the combustion is discharged to the outside as the exhaust gas 56 through the exhaust passage 16 in an exhaust stroke in which the exhaust valve openings 17 are opened.
【００１８】また、上記シリンダ２，シリンダヘッド７
には、冷却水ポンプ５７で加圧されて供給される冷却水
５８によって燃焼室１１周りを冷却させる冷却水ジャケ
ット５９が設けられている。この冷却水ジャケット５９
は、シリンダ２に形成された第１冷却水ジャケット６０
と、上記シリンダヘッド７の燃料噴射弁２６下側近傍に
形成され第２冷却水ジャケット６４と、上記シリンダヘ
ッド７に形成された第３, 第４冷却水ジャケット６７,
６８とを備えている。The cylinder 2, the cylinder head 7
Is provided with a cooling water jacket 59 for cooling around the combustion chamber 11 with cooling water 58 pressurized and supplied by a cooling water pump 57. This cooling water jacket 59
Is the first cooling water jacket 60 formed in the cylinder 2
A second cooling water jacket 64 formed near the lower side of the fuel injection valve 26 of the cylinder head 7, and third and fourth cooling water jackets 67 formed on the cylinder head 7.
68.
【００１９】一方、本実施形態エンジン１では、上記燃
焼室構成面、即ちシリンダヘッド７の燃焼凹部７ａの内
面, ピストン９の頂面９ａ, 吸気弁１９及び排気弁２１
の傘部１９ａ，２１ａの下面, 点火プラグ５１の電極部
５１ａ, 燃料噴射弁２６の先端部２６ａに、本発明のカ
ーボン付着防止構造を構成する酸化チタン皮膜ａが形成
されている。On the other hand, in the engine 1 of this embodiment, the combustion chamber constituting surface, that is, the inner surface of the combustion recess 7a of the cylinder head 7, the top surface 9a of the piston 9, the intake valve 19 and the exhaust valve 21
On the lower surfaces of the umbrella portions 19a and 21a, the electrode portion 51a of the spark plug 51, and the tip portion 26a of the fuel injection valve 26, a titanium oxide film a constituting the carbon adhesion preventing structure of the present invention is formed.
【００２０】上記酸化チタン皮膜ａは、バインダーとし
て過酸化チタンを用いる過酸化チタン法によりコーティ
ングされたものである。この過酸化チタン法による酸化
チタン皮膜においては、常温〜２００℃未満では過酸化
チタン層がバインダーとして残るものの、２００℃以上
では過酸化チタンが相変化してアナターゼ型酸化チタン
に変化してバインダーの影響が低下されるものである。The titanium oxide film a is coated by a titanium peroxide method using titanium peroxide as a binder. In the titanium oxide film formed by the titanium peroxide method, the titanium peroxide layer remains as a binder at a temperature lower than room temperature to less than 200 ° C., but at 200 ° C. or more, the titanium peroxide changes its phase to anatase-type titanium oxide to form a binder. The effect is reduced.
【００２１】なお、上記酸化チタン皮膜ａはゾル・ゲル
法によって形成しても良い。このゾル・ゲル法の場合、
まずチタニウムアルコキシドやチタニウムキレートなど
有機系チタンの溶液（ゾル）を皮膜被形成面（燃焼室構
成面）に塗布し、乾燥させてゲルを作り、続いてこれを
５００℃以上に加熱することにより酸化チタン皮膜が形
成される。The titanium oxide film a may be formed by a sol-gel method. In the case of this sol-gel method,
First, a solution (sol) of an organic titanium such as titanium alkoxide or titanium chelate is applied to the surface on which the film is to be formed (combustion chamber constituting surface) and dried to form a gel, which is then heated to 500 ° C. or higher to oxidize it. A titanium film is formed.
【００２２】ここで上記燃焼室１１内での燃焼において
は、火炎発光を分光分析した結果、図２に示すように、
４００ｎｍより波長の短い紫外線光が発生していること
が確認されている。Here, in the combustion in the combustion chamber 11, as a result of spectral analysis of flame emission, as shown in FIG.
It has been confirmed that ultraviolet light having a wavelength shorter than 400 nm is generated.
【００２３】図２は燃焼における火炎発光を分光分析し
たものであり、３５０〜５００ｎｍにわたるＣＯ−Ｏの
再結合発光, ピーク波長の３０６. ４ｎｍのＯＨラジカ
ルの発光, ４３１. ４ｎｍのＣＨラジカルの発光等の存
在を示している。FIG. 2 shows the results of a spectral analysis of the flame emission during combustion. The recombination emission of CO—O extends from 350 to 500 nm, the emission of an OH radical at a peak wavelength of 306.4 nm, and the emission of a CH radical at 431.4 nm. And the like.
【００２４】本実施形態のエンジン１では、上記酸化チ
タン皮膜が上記紫外線により光触媒として作用し、上記
燃焼室構成面において、 Ｃ＋２Ｈ2 Ｏ＋４ｈ+ → ＣＯ2 ＋４Ｈ+ ・・・（Ａ） の反応が発生すると思われる。上記式（Ａ）においてｈ
+ は、紫外線の光エネルギーの強度をその数で示す光子
（電子ホール）を示しており、上記式（Ａ）では４個の
光子で１個の炭素を酸化している。In the engine 1 of this embodiment, the titanium oxide film acts as a photocatalyst due to the ultraviolet light, and a reaction of C + 2H 2 O + 4h + → CO 2 + 4H + ... It seems to be. In the above formula (A), h
+ Indicates a photon (electron hole) indicating the intensity of the light energy of ultraviolet light by its number, and in the above formula (A), one photon oxidizes one carbon.
【００２５】このように本実施形態では、上記燃焼室構
成面に酸化チタン皮膜ａを形成したので、上記燃焼室構
成面に付着したカーボンおよびオイルが燃焼により発生
する紫外線で二酸化炭素に酸化分解され、燃焼室外に排
出されるため、排ガス中のＨＣを減少でき、また、燃料
噴射弁２６の先端へのカーボン付着を低減して、燃料噴
霧の微粒化を向上でき、燃焼性能を向上することができ
る。As described above, in the present embodiment, since the titanium oxide film a is formed on the surface of the combustion chamber, carbon and oil adhering to the surface of the combustion chamber are oxidized and decomposed into carbon dioxide by ultraviolet rays generated by combustion. Since the exhaust gas is discharged outside the combustion chamber, HC in the exhaust gas can be reduced, carbon adhesion to the tip of the fuel injection valve 26 can be reduced, atomization of fuel spray can be improved, and combustion performance can be improved. it can.
【００２６】また、上記冷却水ジャケット５９を設けた
ので、酸化チタンが４００℃以上になると結晶状態が変
化することにより酸化チタンの光触媒効果が低下すると
しても、本実施形態エンジン１では燃焼室構成面は冷却
効果により４００℃以下に保たれているため、上記劣化
の心配はない。Further, since the cooling water jacket 59 is provided, even if the photocatalytic effect of the titanium oxide is reduced due to the change of the crystal state when the temperature of the titanium oxide exceeds 400 ° C., the engine 1 of this embodiment has a combustion chamber structure. Since the surface is kept at 400 ° C. or lower by the cooling effect, there is no concern about the above-mentioned deterioration.
【図１】本発明の一実施形態構造が適用されたエンジン
の断面側面図である。FIG. 1 is a cross-sectional side view of an engine to which an embodiment of the present invention is applied.
【図２】上記エンジンの燃焼による火炎発光の分光分析
結果を示す図である。FIG. 2 is a diagram showing a result of a spectroscopic analysis of flame emission due to combustion of the engine.
１ エンジン（内燃機関） ６ シリンダボア ７ａ 燃焼凹部（燃焼室構成面） ９ａ ピストン上面（燃焼室構成面） １９ａ，２１ａ 吸，排気弁の傘部（燃焼室構成面） ２６ａ 燃料噴射弁の先端部（燃焼室構成面） ５１ａ 点火プラグの電極部（燃焼室構成面） ａ 酸化チタン皮膜 DESCRIPTION OF SYMBOLS 1 Engine (internal combustion engine) 6 Cylinder bore 7a Combustion concave portion (combustion chamber constituting surface) 9a Piston upper surface (combustion chamber constituting surface) 19a, 21a Head portion of intake and exhaust valves (combustion chamber constituting surface) 26a Tip portion of fuel injection valve ( Combustion chamber surface 51a Electrode of spark plug (combustion chamber surface) a Titanium oxide film
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3G023 AA01 AA15 AC05 AD03 AD09 AE05 AE06 AG05 3G024 AA02 DA01 DA03 DA10 FA00 GA18 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G023 AA01 AA15 AC05 AD03 AD09 AE05 AE06 AG05 3G024 AA02 DA01 DA03 DA10 FA00 GA18
Claims (1)
に酸化チタン皮膜を形成したことを特徴とする内燃機関
の燃焼室のカーボン付着防止構造。1. A structure for preventing carbon from adhering to a combustion chamber of an internal combustion engine, wherein a titanium oxide film is formed on a surface of the combustion chamber other than an inner peripheral surface of a cylinder bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353072A JP2000179344A (en) | 1998-12-11 | 1998-12-11 | Carbon adhesion preventing structure of combustion chamber of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353072A JP2000179344A (en) | 1998-12-11 | 1998-12-11 | Carbon adhesion preventing structure of combustion chamber of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000179344A true JP2000179344A (en) | 2000-06-27 |
Family
ID=18428376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10353072A Withdrawn JP2000179344A (en) | 1998-12-11 | 1998-12-11 | Carbon adhesion preventing structure of combustion chamber of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000179344A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1298294A1 (en) * | 2001-09-28 | 2003-04-02 | Mazda Motor Corporation | Piston for a direct-injection spark-ignition engine and a direct-injection spark-ignition engine equipped with the piston |
| WO2003095804A1 (en) * | 2002-05-10 | 2003-11-20 | Yamaha Hatsudoki Kabushiki Kaisha | Valve spring supporting structure of engine |
| JP2010209790A (en) * | 2009-03-10 | 2010-09-24 | Toyota Motor Corp | Internal combustion engine |
-
1998
- 1998-12-11 JP JP10353072A patent/JP2000179344A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1298294A1 (en) * | 2001-09-28 | 2003-04-02 | Mazda Motor Corporation | Piston for a direct-injection spark-ignition engine and a direct-injection spark-ignition engine equipped with the piston |
| WO2003095804A1 (en) * | 2002-05-10 | 2003-11-20 | Yamaha Hatsudoki Kabushiki Kaisha | Valve spring supporting structure of engine |
| US7082916B2 (en) * | 2002-05-10 | 2006-08-01 | Yamaha Hatsudoki Kabushiki Kaisha | Valve spring support structure of engine |
| JP2010209790A (en) * | 2009-03-10 | 2010-09-24 | Toyota Motor Corp | Internal combustion 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: 20060307 |