JPS58185925A - Combustion chamber for diesel engine - Google Patents

Combustion chamber for diesel engine

Info

Publication number
JPS58185925A
JPS58185925A JP57068435A JP6843582A JPS58185925A JP S58185925 A JPS58185925 A JP S58185925A JP 57068435 A JP57068435 A JP 57068435A JP 6843582 A JP6843582 A JP 6843582A JP S58185925 A JPS58185925 A JP S58185925A
Authority
JP
Japan
Prior art keywords
combustion chamber
side face
face
concave parts
nozzle
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
Application number
JP57068435A
Other languages
Japanese (ja)
Other versions
JPS632008B2 (en
Inventor
Shingo Tsuruoka
鶴岡　慎悟
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.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
Hino Jidosha 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 Hino Motors Ltd, Hino Jidosha Kogyo KK filed Critical Hino Motors Ltd
Priority to JP57068435A priority Critical patent/JPS58185925A/en
Priority to US06/545,039 priority patent/US4538566A/en
Priority to PCT/JP1983/000128 priority patent/WO1983003875A1/en
Priority to DE8383901232T priority patent/DE3373694D1/en
Priority to EP83901232A priority patent/EP0105933B2/en
Priority to AT83901232T priority patent/ATE29764T1/en
Publication of JPS58185925A publication Critical patent/JPS58185925A/en
Publication of JPS632008B2 publication Critical patent/JPS632008B2/ja
Granted 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0636—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston the combustion space having a substantially flat and horizontal bottom
    • 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
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0648—Means or methods to improve the spray dispersion, evaporation or ignition
    • F02B23/0651—Means or methods to improve the spray dispersion, evaporation or ignition the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
    • 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
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
    • 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
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/40—Squish effect
    • 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
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
    • F02B23/0621—Squish flow
    • 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
    • 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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
    • 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)
  • Dispersion Chemistry (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

PURPOSE:To improve the combustion efficiency by forming a throttled part around the whole circumferrence of the inlet of a combustion chamber and several concave parts connected to the side face of the combustion chamber with the side face remained at least as a face for obtaining a strong squish and inducing partial eddy. CONSTITUTION:On the top face of a piston 1, a combustion chamber 3 provided with a throttled part 2 extended to the center around the whole circumference of the inlet part is concaved, and on the cylinder head, a nozzle 4 is equipped to inject fuel. The side face of the combustion chamber 3 is provided with concave parts 5 connected to the side face at several spots, and between neighboring concave parts 5, the above-said face is remained at least as a face (side face) 6. In this construction, atomized fuel 7 injected from the nozzle 4 is mixed with air as being swept away by swirl, partly dashed against a side face 6 of the combustion chamber 3, and reflected toward the central part. The partial prolongation of the length of the throttled part 2 due to the existence of concave parts 5 permits to generate sufficient squish.

Description

【発明の詳細な説明】 本発明は、ピストンの頂面に凹設した燃焼室に燃料を直
接噴射供給するようにしたディーゼル機関の燃焼室に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion chamber of a diesel engine in which fuel is directly injected and supplied to a combustion chamber recessed in the top surface of a piston.

この種ディーゼル機関の燃焼室としては、例えば、特公
昭４９−１６８８１月公報、特公昭５１−４２２４９号
公報に記載されたようなものがある。ここに、前者は、
燃料噴霧の衝突面である燃焼室の側面を渦流の方向に傾
斜させて空気の渦流を助長させるようにしたものであり
、後者は、燃料噴霧の衝突面である燃焼室の側面を平面
状にしてこれに燃料を傾斜衝突させるようにしたもので
ある。Examples of the combustion chamber of this type of diesel engine include those described in Japanese Patent Publication No. 16881-1972 and Japanese Patent Publication No. 42249-1987. Here, the former is
The side surface of the combustion chamber, which is the collision surface of the fuel spray, is inclined in the direction of the vortex to promote the vortex flow of air. The fuel is collided with this at an angle.

従って、これらのものでは、いずれも燃料と空気との混
合性能がある程度改善されるという利点があシながらも
、前者の場合は燃焼室の側面に突部が残ってヒートスポ
ットとなり易いため、との突部がピストンの亀裂の起点
となり、あるいは、前記突部が溶損するおそれがあった
。又、後者の場合は、燃焼室の側面にコーナーが残され
るの゛で不完全燃焼を起して排気特性が悪化し易いとい
う不具合があった。Therefore, although all of these have the advantage of improving the mixing performance of fuel and air to some extent, the former leaves protrusions on the sides of the combustion chamber and tends to become heat spots. There was a risk that the protrusions would become the starting point for cracks in the piston, or that the protrusions would be melted away. Further, in the latter case, corners are left on the side surfaces of the combustion chamber, which causes incomplete combustion and tends to deteriorate exhaust characteristics.

本発明は、このような従来の不具合を解消するためにな
されたものであシ、スキッシュを生成させるための絞り
部を燃焼室の入口全周部に形成すると同時に、燃焼室の
側面に連続する複数個の凹部を前記側面を少なくとも面
として残して該側面に形成することにより、燃焼室の入
口面積をさはど大きくすることなく充分な強さのスキッ
シュを得て燃焼効率を向上させると共に、前記四部を設
けたことで燃料噴霧とスワールにともなう側面部分での
空気の小＃Ｊ流とを適切に混合させて第１期燃焼を小さ
くシ、以って、燃焼によって生じる排ガス成分を少なく
しつつ燃料消費率を向上させることを目的としている。The present invention has been made in order to eliminate such conventional problems.A constriction part for generating squish is formed at the entire circumference of the inlet of the combustion chamber, and at the same time, a constriction part that is continuous with the side surface of the combustion chamber is formed. By forming a plurality of recesses on the side surface while leaving at least the side surface as a surface, a sufficiently strong squish can be obtained without increasing the inlet area of the combustion chamber to improve combustion efficiency, and By providing the above four parts, the fuel spray and the small #J flow of air at the side part due to the swirl are appropriately mixed, and the first stage combustion is made smaller, thereby reducing the exhaust gas components generated by combustion. The aim is to improve the fuel consumption rate at the same time.

以下に本発明を図示された一実施例に基づいて詳細に説
明する。The present invention will be explained in detail below based on an illustrated embodiment.

図示しないシリンダ内で往後動するピストン１の頂面に
は、中心に向って延びる絞シ部２を入口部の全周縁に形
成した燃焼室３を凹設しており、図示しないシリンダヘ
ッドには、前記燃焼室３の側面に向って燃料を噴射する
ノズル４を装着してディーゼル機関を構成している。A combustion chamber 3 is formed in the top surface of a piston 1 that moves back and forth in a cylinder (not shown), and has a constriction part 2 extending toward the center formed around the entire periphery of the inlet. The diesel engine is equipped with a nozzle 4 that injects fuel toward the side surface of the combustion chamber 3.

又、前記燃焼室３の側面の複数箇所には、該側面に連続
する四部５を設けると共に、隣接する四部５の間に前記
側面を少なくとも面（側面）６として残している。この
凹部５は、燃焼室３の側面６を形成する曲ｍ１より半径
の小さい曲面等で構成され、凹部５と側面６との接続部
を例えば円弧状に削成して凹部５と側面６とを円滑に連
続させるが、隣接する凹部５の間には必ず側面６を残し
ておく必叢があ如、この凹部５を形成することにより、
紋り部２の幅を部分的に大きくしている。尚、四部５の
数は、燃焼室３の大きさによっても相違するが、ノズル
４に設けられている噴口の数とＩＩＩ−にし、あるいは
、噴口の数より１個だけ多く又は少なくすることにより
、各噴口から噴射された燃料噴霧の衝突面の形状を異な
らせても良い。Further, four parts 5 continuous to the side surface are provided at a plurality of locations on the side surface of the combustion chamber 3, and at least a surface (side surface) 6 is left between the adjacent four parts 5. The recess 5 is composed of a curved surface having a smaller radius than the curve m1 forming the side surface 6 of the combustion chamber 3, and the connecting portion between the recess 5 and the side surface 6 is cut into, for example, an arc shape. However, by forming this recess 5, it is necessary to leave a side surface 6 between adjacent recesses 5.
The width of the crest part 2 is partially increased. The number of the four parts 5 varies depending on the size of the combustion chamber 3, but it can be made equal to the number of nozzles provided in the nozzle 4, or by making it one more or less than the number of nozzles. , the shape of the collision surface of the fuel spray injected from each nozzle may be made different.

上記の構成において、ノズル４から噴射された燃料噴霧
７け、スワールによって押し流されつつ空気と混合して
その一部が燃焼室３の側面６に衡突し、中心部に向って
反射する。このとき、ノズル４の噴口の数と四部５の数
とを異ならせた場合、例えば、ノズル４に設けた噴口の
数より四部５の数を１つたけ多くして両者をそれぞれ等
配形成した場合は、各噴口からの噴霧の価突条件がそれ
ぞれ異って混合気の性状が変っているために、相関の連
転状態の変化に対しても少なくともいずれか１蝕所では
混合気の性状が理想的な状態になって着実に着火して燃
焼を開始する。このために、いかなる運転状況にあろう
とも、着火遅れ期間が短かくなって燃焼が円滑化される
。In the above configuration, the fuel spray 7 injected from the nozzle 4 is swept away by the swirl and mixes with the air, and a part of it impinges on the side surface 6 of the combustion chamber 3 and is reflected toward the center. At this time, when the number of nozzles of the nozzle 4 and the number of the four parts 5 are made different, for example, the number of the four parts 5 is increased by one more than the number of nozzles provided in the nozzle 4, and both are equally spaced. In this case, the properties of the mixture change due to the different conditions for the spray from each nozzle, so the properties of the mixture change at least at one eclipse even with changes in the continuous state of correlation. becomes ideal and steadily ignites and begins combustion. For this reason, the ignition delay period is shortened and combustion becomes smoother under any operating conditions.

又、凹部５を設けたことによって絞り部２の長さが部分
的に大きくなっているために、充分なスキッシュが発生
して燃焼効率が向上する。そして、燃焼室の内面が四部
５を設けたことで滑らかな凹凸状になっているだめに、
スワールによって局部的な渦流（小渦流）がひき起され
て燃焼室側面に付着している燃料の蒸発が促進され、燃
焼期間が知縮される。ＥＫ、全体としての絞り部をさほ
ど大きくすることなく前記のように充分な強さのスキッ
シュを得ることができるために、絞）部によって一旦燃
焼室に閉じ込められていた火炎が適当な時期にスキッシ
ュエリアにも噴出する。このために、排ガス成分の生成
が抑制されると同時に空気オａ用率が島〈なって排煙濃
度及び燃料消費率が改善される。更にまた、燃焼室３の
側面６の一部を凹部５の間に面として残しているため、
熱負荷−５〜 的にも有利な燃焼室形状となる。Further, since the length of the constriction part 2 is partially increased by providing the recess 5, sufficient squish is generated and the combustion efficiency is improved. And, because the inner surface of the combustion chamber has a smooth uneven shape due to the provision of the four parts 5,
The swirl causes local eddy currents (small eddy currents) to promote evaporation of fuel adhering to the side surfaces of the combustion chamber, thereby shortening the combustion period. EK, because it is possible to obtain a squish of sufficient strength as described above without increasing the overall size of the constriction, the flame, which was once confined in the combustion chamber by the constriction, squishes at an appropriate time. It also erupts in the area. For this reason, the generation of exhaust gas components is suppressed, and at the same time, the air usage rate is reduced, and the exhaust gas concentration and fuel consumption rate are improved. Furthermore, since a part of the side surface 6 of the combustion chamber 3 is left as a surface between the recesses 5,
The combustion chamber shape is also advantageous in terms of heat load -5~.

以上説明したように本発明によれば、絞り部をさほど大
きくすることなく強いスキッシュを得ることができると
共に、燻焼室内に生じる渦流によって局部的な渦流（乱
れ）を誘発させて空気と燃料との混合を良くでき、しか
も、火炎の閉じ込め期間が過度に長く々らない。このた
めに、燃料の噴射時期を遅らせることなく排ガス成分の
生成を抑制できると共に、燃焼効率が高くなって燃料消
費率及びυト煙濃度が改善される。又、燃焼室の内面に
エツジ及びコーナーがないので、ヒートスポットがなく
なると同時に、不完全燃焼にともなう未燃成分の排出量
をも低減できる。As explained above, according to the present invention, it is possible to obtain a strong squish without making the constriction part very large, and the vortex generated in the smoking chamber induces local vortices (turbulence) to separate air and fuel. It is possible to improve the mixing of the flames, and the flame confinement period is not excessively long. For this reason, the generation of exhaust gas components can be suppressed without delaying the fuel injection timing, and combustion efficiency is increased to improve fuel consumption rate and smoke density. Furthermore, since there are no edges or corners on the inner surface of the combustion chamber, there are no heat spots, and at the same time, the amount of unburned components emitted due to incomplete combustion can be reduced.

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

第１図は本発明の一実施例を備えたピストンの斜視図、
第２図は第１図の断面図、第３図は第２図のＩＩＩ−Ｉ
Ｉ断面図である。 １・・・ピストン　　　　　　２・・絞多部３・・・＆
ｌｉ室　　　　　　４・・・ノズル５・・・凹　部　　
　　　　６・・・側　面特許出願人　　日野自動車工業
株式会社　６−FIG. 1 is a perspective view of a piston equipped with an embodiment of the present invention;
Figure 2 is a cross-sectional view of Figure 1, Figure 3 is III-I in Figure 2.
It is an I sectional view. 1... Piston 2... Throttle part 3... &
Li chamber 4... Nozzle 5... Concave part
6...Side patent applicant Hino Motors Co., Ltd. 6-

Claims (1)

【特許請求の範囲】[Claims] ピストンの頂面に燃焼室を凹設すると共に、前記燃焼室
の側面に向って燃料を噴射するノズルを設けたティーセ
ル機関において、燃焼室の入口部全周縁に中心に向って
延びる絞シ部を形成し、燃焼室の側面の複数位置に該π
１ｕ面と連続する四部を設けると共に、隣接する凹部間
に燃焼室の側面を少なくとも面として残したことを特徴
とするディーゼル機関の燃焼室。In a tea cell engine that has a combustion chamber recessed in the top surface of the piston and a nozzle that injects fuel toward the side surface of the combustion chamber, a throttle part that extends toward the center is provided on the entire periphery of the inlet of the combustion chamber. The pi is formed at multiple positions on the side of the combustion chamber.
A combustion chamber for a diesel engine, characterized in that four parts are provided that are continuous with the 1u surface, and at least a side surface of the combustion chamber is left as a surface between adjacent recessed parts.
JP57068435A 1982-04-23 1982-04-23 Combustion chamber for diesel engine Granted JPS58185925A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP57068435A JPS58185925A (en) 1982-04-23 1982-04-23 Combustion chamber for diesel engine
US06/545,039 US4538566A (en) 1982-04-23 1983-04-23 Combustion chamber in a diesel engine
PCT/JP1983/000128 WO1983003875A1 (en) 1982-04-23 1983-04-23 Combustion chamber of diesel engine
DE8383901232T DE3373694D1 (en) 1982-04-23 1983-04-23 Combustion chamber of diesel engine
EP83901232A EP0105933B2 (en) 1982-04-23 1983-04-23 Combustion chamber of diesel engine
AT83901232T ATE29764T1 (en) 1982-04-23 1983-04-23 COMBUSTION CHAMBER OF A DIESEL ENGINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57068435A JPS58185925A (en) 1982-04-23 1982-04-23 Combustion chamber for diesel engine

Publications (2)

Publication Number Publication Date
JPS58185925A true JPS58185925A (en) 1983-10-29
JPS632008B2 JPS632008B2 (en) 1988-01-16

Family

ID=13373619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57068435A Granted JPS58185925A (en) 1982-04-23 1982-04-23 Combustion chamber for diesel engine

Country Status (1)

Country Link
JP (1) JPS58185925A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148731U (en) * 1986-03-13 1987-09-19
JPS62255521A (en) * 1986-04-30 1987-11-07 Isuzu Motors Ltd Pent roof type piston
JPS6387227U (en) * 1986-11-28 1988-06-07
JPH0218619U (en) * 1988-07-18 1990-02-07

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562020U (en) * 1979-06-20 1981-01-09

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236033A (en) * 1975-09-17 1977-03-19 Matsushita Electric Ind Co Ltd Image recording process and device therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562020U (en) * 1979-06-20 1981-01-09

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148731U (en) * 1986-03-13 1987-09-19
JPS62255521A (en) * 1986-04-30 1987-11-07 Isuzu Motors Ltd Pent roof type piston
JPS6387227U (en) * 1986-11-28 1988-06-07
JPH0218619U (en) * 1988-07-18 1990-02-07

Also Published As

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JPS632008B2 (en) 1988-01-16

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