KR100373249B1 - A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle - Google Patents

A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle Download PDF

Info

Publication number
KR100373249B1
KR100373249B1 KR1019970027476A KR19970027476A KR100373249B1 KR 100373249 B1 KR100373249 B1 KR 100373249B1 KR 1019970027476 A KR1019970027476 A KR 1019970027476A KR 19970027476 A KR19970027476 A KR 19970027476A KR 100373249 B1 KR100373249 B1 KR 100373249B1
Authority
KR
South Korea
Prior art keywords
combustion chamber
cylinder
cylinder liner
piston
diesel engine
Prior art date
Application number
KR1019970027476A
Other languages
Korean (ko)
Other versions
KR19990003582A (en
Inventor
손종문
Original Assignee
기아자동차주식회사
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 기아자동차주식회사 filed Critical 기아자동차주식회사
Priority to KR1019970027476A priority Critical patent/KR100373249B1/en
Publication of KR19990003582A publication Critical patent/KR19990003582A/en
Application granted granted Critical
Publication of KR100373249B1 publication Critical patent/KR100373249B1/en

Links

Images

Classifications

    • 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 
    • F02F1/004—Cylinder liners
    • 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
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/002—Arrangements of sealings in combustion engines  involving cylinder heads
    • 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

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)

Abstract

PURPOSE: A diesel engine is provided to prevent environmental contamination by increasing volume of combustion chamber and preventing emission of noxious component. CONSTITUTION: A diesel engine comprises a cylinder block(2); a cylinder liner(20) mounted at the inner stepped surface of the cylinder block, which has a top surface disposed at the position same with the position of the top surface of the cylinder block; a piston(4) on which a combustion chamber(6) is formed, wherein the piston is rubbed against the inner surface of the cylinder liner and moves in a vertical direction so as to compress an air-fuel mixture; a cylinder head(8) having an injection nozzle(10) communicated to the combustion chamber, which is coupled with the cylinder block by a cylinder head gasket(12) disposed on the top surface of the cylinder block and certain part of the top surface of the cylinder liner; and a sub combustion chamber(30) formed by the top surface of the piston, inner surface and top surface of the cylinder liner, inner surface of the cylinder head gasket and the bottom surface of the cylinder head, wherein the sub combustion chamber is communicated to the combustion chamber of the piston.

Description

실린더 라이너 상부에 부연소실을 형성한 차량용 디젤 엔진{A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle}A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle}

본 발명은 실린더 라이너 상부에 부연소실을 형성한 차량용 디젤 엔진에 관한 것으로, 더욱 상세하게는 실린더 라이너의 화이어 덱을 제거하여 연소실 체적을 증대시켜 완전연소를 유도함으로써 유해한 성분의 배출을 막아 환경오염을 방지할 수 있는 실린더 라이너 상부에 부연소실을 형성한 차량용 디젤엔진에 관한 것이다.The present invention relates to a vehicle diesel engine having a sub-combustion chamber formed on an upper portion of a cylinder liner. More particularly, the fire deck of the cylinder liner is removed to increase the combustion chamber volume to induce complete combustion, thereby preventing the emission of harmful components and thereby causing environmental pollution. The present invention relates to a diesel engine for a vehicle in which a sub-combustion chamber is formed on a cylinder liner that can be prevented.

통상, 디젤엔진은 고온 고압의 공기중에 연료를 분사시켜 연소를 유도하는 자기착화기관으로, 경운기 엔진과 같은 저속디젤엔진에서는 혼합기 형성과 연소에 허용되는 시간이 길기 때문에 공기의 와류유동 없이, 분무의 확산만으로도 연소를 완료시킬 수 있으나, 자동차용 엔진과 같은 고속 디젤기관의 경우에는 공기와류의 도움없기 단시간내에 연소를 완료시킬 수 없다. 그러므로, 고속 디젤기관의 흡기계와 연소실은 와류를 생성시켜 공기와 연료를 짧은 시간내에 혼합시켜야 한다.In general, a diesel engine is a self-ignition engine that induces combustion by injecting fuel into high-temperature, high-pressure air. In low-speed diesel engines such as cultivator engines, the time allowed for the formation and combustion of the mixer is long, so that air is not sprayed without vortex flow. Diffusion alone can complete combustion, but high speed diesel engines such as automotive engines cannot complete combustion in a short time without the help of air vortices. Therefore, the intake and combustion chambers of the high speed diesel engine generate vortices to mix air and fuel in a short time.

자동차용 고속 디젤기관의 연소실로는 연료를 피스톤 헤드 상부의 주연소실에 직접 분사하며 분사된 연료는 주연소실에서 공기와 혼합되어 혼합기를 형성하는 직접분사방식의 연소실과, 최소한 2개 이상으로 분할된 주연소실과 부연소실을 지닌간접분사방식의 연소실로 나눌 수 있다.The combustion chamber of the high-speed diesel engine for automobiles directly injects fuel into the main combustion chamber above the piston head, and the injected fuel is directly injected into the combustion chamber in which the mixture is mixed with air in the main combustion chamber to form a mixer, and is divided into at least two. It can be divided into indirect injection type combustion chamber with main combustion chamber and secondary combustion chamber.

도 1은 이러한 직접분사방식의 디젤엔진에서 채용하고 있는 실린더 헤드의 일부분을 도시한 단면도이다. 이것의 개략적인구성을 보면, 실린더 블록(2)을 구성하는 다수의 실린더의 내부에는 피스톤(4)이 상하로 왕복이동 할 수 있도록 장착되어있으며, 상부에는 실린더 헤드(8)가 배치되어 있다. 실린더 헤드(8)의 상부에는 분사노즐(10)이 설치되어 있으며, 실린더블록(2)과 피스톤(4)사이에는 실린더 라이너(14)가 끼워져 있다. 실린더 라이너(14)에는 연소열이 실린더 블록쪽으로 전달되는 것을 차단하기 위한 화이어 덱(fire deck)(14a) 및 요홈(14b)가 형성되어 있다.실린더 블록과 실린더 헤드(8)사이에는 실린더 헤드 가스켓(12)이 끼워져 있다.1 is a cross-sectional view showing a part of a cylinder head employed in such a direct injection diesel engine. In the schematic configuration of this, the piston 4 is mounted inside the plurality of cylinders constituting the cylinder block 2 so as to reciprocate up and down, and the cylinder head 8 is disposed above. An injection nozzle 10 is provided above the cylinder head 8, and a cylinder liner 14 is fitted between the cylinder block 2 and the piston 4. The cylinder liner 14 is provided with a fire deck 14a and a recess 14b for preventing the combustion heat from being transferred to the cylinder block. A cylinder head gasket (between the cylinder block and the cylinder head 8) is formed. 12) is inserted.

실린더 헤드(8)의 상부에 설치된 분사노즐(10)로부터 분사된 연료는 흡기관을 통해 유입된 공기와 혼합되어, 피스톤(4)의헤드부에 제공되는 연소실(6)에서 연소된다. 연소실(6)은 실린더 헤드(8)의 하부면과 피스톤 헤드에 형성된 공간부에 의해 제공된다.The fuel injected from the injection nozzle 10 provided on the upper portion of the cylinder head 8 is mixed with the air introduced through the intake pipe and combusted in the combustion chamber 6 provided in the head portion of the piston 4. The combustion chamber 6 is provided by the lower surface of the cylinder head 8 and the space portion formed in the piston head.

이러한 구성을 지닌 종래의 차량용 디젤 엔진의 실린더 라이너(14)에는 화이어덱(14a)이 형성되어 있기 때문에 연소실체적에 제한되어 있어 미연소 가스가 발생하게 되며, 그로 인해, 유해한 가스의 배출이 증대되어 환경을 오염시킨다. 또한, 요홈(14b)을 형성하는 데 따른 생산성의 증가로 제품의 경쟁력을 저하시키는 문제가 있다.Since the cylinder deck 14a of the conventional diesel engine for vehicles having such a structure is formed with a fire deck 14a, the combustion volume is limited and unburned gas is generated, thereby increasing the emission of harmful gases. Pollute the environment. In addition, there is a problem in that the competitiveness of the product is lowered due to an increase in productivity due to the formation of the recess 14b.

본 발명은 상기와 같은 종래의 문제점을 해소하고자 창출된 것으로, 연소실 체적을 증대시켜 완전연소를 유도함으로써 유해한 성분의 배출을 막아 환경오염을 방지할 수 있는 실린더 라이너 상부에 부연소실을 형성한 차량용 디젤엔진를 제공함에 있다.The present invention was created to solve the above-mentioned conventional problems, and increases the combustion chamber volume to induce complete combustion to prevent the emission of harmful components to prevent environmental pollution by forming a vehicle diesel combustion engine on the top of the cylinder liner In providing an engine.

상기와 같은 본 발명의 목적은, 다수의 실린더가 형성된 실린더 블록과; 실린더 블록의 내측 단차면에 재치되어 있으며, 실린더 블록의 상부면과 동일면 상에 상부면이 위치된 실린더 라이너와; 상부측에 연소실이 형성되어 있으며, 실린더 라이너의 내측면과 윤활마찰되어 상하왕복 이동하면서 혼합기를 압축하도록 제공된 피스톤과; 연소실과 연통되도록 분사노즐이 형성되어 있으며, 실린더 블록의 상부면과 실린더 라이너의 상부 주면의 일부에 위치된 실린더 헤드 가스켓에 의해 실린더 블록과 밀폐되도록 체결된 실린더 헤드와; 피스톤의 상부면, 실린더 라이너의 내측면 및 상부면, 실린더 헤드 가스켓의 내주면 그리고, 실린더 헤드의 하부면에 의해 형성되어 있으며 피스톤의 연소실과 연통된 부연소실을 포함하여 구성된 실린더 라이너 상부에 부연소실을 형성한 차량용 디젤엔진에 의해 달성될 수 있다.An object of the present invention as described above, the cylinder block formed with a plurality of cylinders; A cylinder liner mounted on an inner step surface of the cylinder block, the cylinder liner having an upper surface on the same surface as the upper surface of the cylinder block; A piston having a combustion chamber formed on an upper side thereof, lubricated with the inner surface of the cylinder liner, and provided to compress the mixer while moving up and down; An injection nozzle formed to communicate with the combustion chamber, the cylinder head being fastened to the cylinder block by a cylinder head gasket positioned on a part of the upper surface of the cylinder block and the upper main surface of the cylinder liner; The subcombustion chamber is formed on the upper portion of the cylinder liner including an upper surface of the piston, an inner surface and an upper surface of the cylinder liner, an inner circumferential surface of the cylinder head gasket, and a lower combustion chamber in communication with the combustion chamber of the piston. It can be achieved by the vehicle diesel engine formed.

도 1은 종래의 차량용 디젤 엔진의 실린더 라이너의 조립상태를 보인 단면도이고,1 is a cross-sectional view showing an assembled state of a cylinder liner of a conventional vehicle diesel engine,

도 2는 본 발명에 따른 차량용 디젤 엔진의 실린더 라이너의 조립상태를 보인 단면도이다.2 is a cross-sectional view showing the assembled state of the cylinder liner of the vehicle diesel engine according to the present invention.

*도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

2 : 실린더 블록 4 : 피스톤2: cylinder block 4: piston

6 : 연소실 8 : 실린더 헤드6: combustion chamber 8: cylinder head

10 : 분사노즐 12 : 실린더 헤드 가스켓10 injection nozzle 12 cylinder head gasket

20 : 실린더 라이너 20b : 외벽20: cylinder liner 20b: outer wall

30 : 부연소실30: combustion chamber

이하 첨부된 도면에 의하여 본 발명의 그 기술적 구성을 상세히 설명하면 다음과 같다.Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail.

도 2를 참조하면, 본 발명의 실린더 라이너 상부에 부연소실이 형성된 차량용 디젤엔진은 종래의 화이어 덱(14a; 도1 참조)을 제거한 실린러 라이너(20)를 실린더 블록(2)에 억지끼워맞춤하여 부연소실(30)을 형성함으로써, 전체적인 연소실(6)(30) 체적을 증대시켜 완전연소를 구현함으로써 유해한 배기가스 성분의 배출을 막아 환경오염을 방지할 수 있는 구조를 갖는다.Referring to FIG. 2, a diesel engine for a vehicle in which a subcombustion chamber is formed on an upper portion of a cylinder liner of the present invention is fitted with a cylinder liner 20 to which a cylinder liner 20 from which a conventional fire deck 14a (see FIG. 1) is removed. By forming the sub-combustion chamber 30, the entire combustion chamber 6, 30 increases in volume, thereby realizing complete combustion, thereby preventing the emission of harmful exhaust gas components and preventing environmental pollution.

실린더 블록(2)은 엔진 구조에 따라 다열로 배열되며, 상부 내측면에 단차면이 형성되어 있어 각기 대응된 실린더 라이너(20)의 외주면과 억지끼워맞춤되어 있다. 그리고, 본 발명의 실린더 라이너(20)는 상부면의 화이어 덱(14a; 도1 참조)과 외벽(20b)에 요홈(14b; 도1 참조)을 가공형성치 않은 형상으로 실린더 블록(2)에 내장된다. 여기서, 실린더 라이너(20)의 상부면은 실린더 블록(2)의 상부면과 동일면 상에 위치되어 있다.The cylinder blocks 2 are arranged in a row in accordance with the engine structure, and a stepped surface is formed on the upper inner surface thereof, and the cylinder blocks 2 are fitted with the outer peripheral surface of the corresponding cylinder liner 20, respectively. In addition, the cylinder liner 20 of the present invention is formed in the cylinder block 2 in a shape that does not form grooves 14b (see FIG. 1) in the fire deck 14a (see FIG. 1) and the outer wall 20b of the upper surface. It is built. Here, the upper surface of the cylinder liner 20 is located on the same surface as the upper surface of the cylinder block 2.

실린더 라이너(20)가 내장된 실린더 블록(2)은 실린더 헤드(8)와 완전 밀폐되도록 실린더 헤드 가스켓(12)이 개재되어 체결되어 있다. 여기서, 실린더 헤드 가스켓(12)은 실린더 블록(2)의 상부면과 실린더 라이너(20)의 상부 주면 일부에 위치된 중공구조로써 내열성과 내구성을 갖는다.The cylinder block 2 in which the cylinder liner 20 is embedded is fastened by interposing a cylinder head gasket 12 so as to be completely sealed with the cylinder head 8. Here, the cylinder head gasket 12 is a hollow structure located on the upper surface of the cylinder block 2 and a part of the upper main surface of the cylinder liner 20 and has heat resistance and durability.

피스톤(4)은 실린더 라이너(20)의 내측벽과 윤활마찰되어 상하왕복 운동에 따라 혼합기를 압축하도록 제공된 실린더 라이너(20)에 제공된 것으로, 상부면에 일정한 연소실(6)이 제공되어 있다.The piston 4 is provided in the cylinder liner 20 provided to lubricate the inner wall of the cylinder liner 20 and compress the mixer according to the up and down movement. A constant combustion chamber 6 is provided on the upper surface.

혼합기의 완전연소를 구현하기 위하여 제공된 본 발명의 부연소실(30)은 피스톤(4)의 상부면, 실린더 라이너(20)의 내측면 및 상부면, 실린더 헤드 가스켓(12)의 내주면 그리고, 실린더 헤드(8)의 하부면에 의해 형성된 공간으로써 피스톤(3)의 행정(stroke)에 따라 체적이 변경된다.The subcombustion chamber 30 of the present invention provided for realizing the combustion of the mixer comprises an upper surface of the piston 4, an inner surface and an upper surface of the cylinder liner 20, an inner peripheral surface of the cylinder head gasket 12, and a cylinder head. The volume formed by the stroke of the piston 3 as a space formed by the lower surface of (8).

이상과 같은 구성의 작동관계를 간단히 설명하면, 본 발명의 디젤엔진은 혼합기가 고압으로 실린더 헤드(8)에 제공된 분사노즐(10)로부터 공급되는 흡기행정이 진행되면, 피스톤(4)이 압축행정에 의해 상승하게 되면서 가압된 후 자기착화에 의해 착화되고 폭발행정에 의해 피스톤(4)이 후퇴되고 배기행정이 수행된다. 이러한 행정들이 진행됨에 있어서, 본 발명의 부연소실(30)은 전체적인 연소실(6)(30)의 체적을 증가시킴으로써 혼합기의 완전연소를 구현하도록 제공된 것이다.Briefly explaining the operation relationship of the configuration as described above, the diesel engine of the present invention, when the intake stroke supplied from the injection nozzle 10 provided to the cylinder head 8 in the mixer at high pressure, the piston 4 is compressed stroke After being pressurized and pressurized, it is ignited by self-ignition and the piston 4 is retracted by the explosive stroke and exhaust stroke is performed. In the course of these strokes, the subcombustion chamber 30 of the present invention is provided to achieve full combustion of the mixer by increasing the volume of the entire combustion chamber 6, 30.

이상으로 설명한 본 발명에 의하면, 연소실 전체의 체적이 증가되어 완전연소가 구현됨으로써 유해한 배출가스를 최대한 억제하여 대기의 오염을 막을 수 있음은 물론, 별도의 화이어 덱과 요홈을 가공할 필요가 없어 작업 공수를 개선할 수있는 이점(利點)이 있다.According to the present invention described above, by the volume of the entire combustion chamber is increased, complete combustion is realized to suppress harmful emissions as much as possible to prevent the pollution of the air, and there is no need to process a separate fire deck and grooves There is an advantage to improve the airborne.

Claims (1)

다수의 실린더가 형성된 실린더 블록(2)과;A cylinder block 2 in which a plurality of cylinders are formed; 상기 실린더 블록(2)의 내측 단차면에 재치되어 있으며, 상기 실린더 블록(2)의 상부면과 동일면 상에 상부면이 위치된 실린더 라이너(20)와;A cylinder liner 20 mounted on an inner stepped surface of the cylinder block 2 and having an upper surface on the same surface as the upper surface of the cylinder block 2; 상부측에 연소실(6)이 형성되어 있으며, 상기 실린더 라이너(20)의 내측면과 윤활마찰되어 상하왕복 이동하면서 혼합기를 압축하도록 제공된 피스톤(4)과;A combustion chamber (6) formed on an upper side thereof, lubricated with the inner surface of the cylinder liner (20) and provided with a piston (4) provided to compress the mixer while moving up and down; 상기 연소실(6)과 연통되도록 분사노즐(10)이 형성되어 있으며, 상기 실린더블록(2)의 상부면과 상기 실린더 라이너(20)의 상부 주면의 일부에 위치된 실린더 헤드 가스켓(12)에 의해 상기 실린더 블록(2)과 밀폐되도록 체결된 실린더 헤드(8)와;An injection nozzle 10 is formed to communicate with the combustion chamber 6, and is provided by a cylinder head gasket 12 positioned on a part of an upper surface of the cylinder block 2 and an upper main surface of the cylinder liner 20. A cylinder head 8 fastened to be sealed to the cylinder block 2; 상기 피스톤(4)의 상부면, 상기 실린더 라이너(20)의 내측면 및 상부면, 상기 실린더 헤드 가스켓(12)의 내주면 그리고, 상기 실린더 헤드(8)의 하부면에 의해 형성되어 있으며 상기 피스톤(4)의 연소실(6)과 연통된 부연소실(30)을 포함하여 구성된 것을 특징으로 하는 실린더 라이너 상부에 부연소실을 형성한 차량용 디젤엔진.The piston 4 is formed by an upper surface of the piston 4, an inner surface and an upper surface of the cylinder liner 20, an inner circumferential surface of the cylinder head gasket 12, and a lower surface of the cylinder head 8. A diesel engine for a vehicle in which a sub-combustion chamber is formed on a cylinder liner, characterized in that it comprises a sub-combustion chamber 30 in communication with the combustion chamber 6 of 4).
KR1019970027476A 1997-06-26 1997-06-26 A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle KR100373249B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970027476A KR100373249B1 (en) 1997-06-26 1997-06-26 A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970027476A KR100373249B1 (en) 1997-06-26 1997-06-26 A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle

Publications (2)

Publication Number Publication Date
KR19990003582A KR19990003582A (en) 1999-01-15
KR100373249B1 true KR100373249B1 (en) 2003-05-09

Family

ID=37416681

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970027476A KR100373249B1 (en) 1997-06-26 1997-06-26 A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle

Country Status (1)

Country Link
KR (1) KR100373249B1 (en)

Also Published As

Publication number Publication date
KR19990003582A (en) 1999-01-15

Similar Documents

Publication Publication Date Title
CN111164285B (en) Internal combustion engine for a motor vehicle
US7201135B2 (en) Internal combustion engine
US5421301A (en) Direct cylinder fuel injection system for internal combustion engines
US5095872A (en) Alcohol engine with combustion cavity
JP3613054B2 (en) Direct injection engine
US4178903A (en) Internal combustion engine with an auxiliary combustion chamber
EP0675273B1 (en) Combustion chamber structure for diesel engines
KR100373249B1 (en) A diesel engine formed secondary combustion chamber on the upside of cylinder liner for a vehicle
US4489687A (en) Piston having fuel diverting barrier means
KR20210000649U (en) A method for operating a slow-running large engine and a slow-running large engine
JPH11280610A (en) Fuel injection nozzle
KR20090064171A (en) Piston head for gasoline direct injection engine
KR19980066729U (en) Cylinder head of diesel engine
DE69012641D1 (en) Combustion chamber for internal combustion engines with auto-ignition.
KR19990003581A (en) Pistons for automotive diesel engines
JP3918361B2 (en) Sub-chamber gas engine
JP2017066904A (en) Structure of combustion chamber of internal combustion engine
KR19990062251A (en) Diesel engine with variable combustion chamber
KR19980023706A (en) Separate combustion chamber structure of piston
KR100233598B1 (en) Two stroke engine
JP2024103329A (en) Internal combustion engine
KR200154376Y1 (en) An automotive engine
JPH07253044A (en) Piston for in-cylinder fuel injection type engine
KR19990004022A (en) Combustion chamber structure of automotive diesel engine
KR20020021433A (en) Piston of diesel engine

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee