KR100257022B1 - Determination device of flame velocity and knock position - Google Patents

Determination device of flame velocity and knock position Download PDF

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Publication number
KR100257022B1
KR100257022B1 KR1019970058611A KR19970058611A KR100257022B1 KR 100257022 B1 KR100257022 B1 KR 100257022B1 KR 1019970058611 A KR1019970058611 A KR 1019970058611A KR 19970058611 A KR19970058611 A KR 19970058611A KR 100257022 B1 KR100257022 B1 KR 100257022B1
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KR
South Korea
Prior art keywords
piston
combustion chamber
knock position
intermediate block
flame propagation
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KR1019970058611A
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Korean (ko)
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KR19990038767A (en
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박덕규
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정몽규
현대자동차주식회사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/68—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using electric discharge to ionise a gas

Abstract

PURPOSE: A flame velocity and knock position determination system is provided to obtain data related to characteristics of flame velocity and knock position with minimizing the change of an engine by sensing and analyzing ion current in a combustion chamber generated in ignition. CONSTITUTION: A flame velocity and knock position determination system includes a piston(24) having a plurality of ion probes(1) at the upper part and inserted into a middle block(10) combined between a cylinder head(8) and a cylinder block(17) to sense ion current within a combustion chamber(9), a supporter(13) connecting a connecting rod(12) coupled with the bottom part of the piston with the piston inserted into the cylinder block, and a process element receiving the ion current outputted from the ion probes for detecting flame velocity characteristics and knock position within the combustion chamber.

Description

화염전파 및 노크위치 측정장치Flame Propagation and Knock Position Measuring Device

본 발명은 연소실 내의 화염전파 및 노크위치 측정장치에 관한 것으로, 더욱 상세하게는 피스톤의 상단에 매설된 다수개의 이온 프로브(ion probe)로 피스톤의 상면에 가해지는 화염 및 이온전류를 측정하여 연소실 내에서의 화염 전파특성 및 노크위치를 측정할 수 있도록 하는 화염전파 및 노크위치 측정장치(flame velocity and knock position determination system)에 관한 것이다.The present invention relates to an apparatus for measuring flame propagation and knock position in a combustion chamber. More particularly, the present invention relates to a flame propagation and knock position measurement apparatus. Flame propagation and knock position determination system for measuring the flame propagation characteristics and knock position in

연소실 내의 화염 전파특성을 측정하는 종래의 측정장치는 실린더 헤드(cylinder head)에 흡기밸브과 배기밸브가 각각 구성되고, 이에 연하여 하방으로 투명재질의 실린더 블록(cylinder block)에 의해 연소실이 형성되며, 또한 이 연소실 내에는 크랭크 샤프트(crank shaft)와 연결되는 피스톤(piston)이 내입되어있다.In the conventional measuring device for measuring the flame propagation characteristics in the combustion chamber, an intake valve and an exhaust valve are respectively formed in a cylinder head, and in this way, a combustion chamber is formed by a cylinder block made of a transparent material downward. Also in this combustion chamber is embedded a piston which is connected to the crank shaft.

이와같이 구성된 측정장치의 연소실에는 캠축의 회전으로 흡기밸브와 흡기밸브가 개폐되면서 혼합기가 흡입되거나 혹은 연소가 완료된 배기가스가 배출되게 된다. 이에따라 측정자는 점화 플러그(spark plug)에서 발화되어 연소실 내에 충진된 혼합기를 통해 전파되는 점화 플러그의 불꽃, 즉 화염의 전파특성을 확인할 수 있다.In the combustion chamber of the measuring device configured as described above, the intake valve and the intake valve are opened and closed by rotation of the cam shaft, and the mixer is sucked in or exhaust gas exhausted from combustion is completed. Accordingly, the measurer can check the propagation characteristics of the spark, that is, the flame of the spark plug which is ignited by the spark plug and propagated through the mixer filled in the combustion chamber.

물론, 흡기밸브와 배기밸브가 개폐되면서 연소실 내에 유입되는 혼합기의 유입상태와 배기가스의 배출상태를 확인할 수 있는 것이다.Of course, as the intake valve and the exhaust valve are opened and closed, it is possible to check the inflow state and the exhaust state of the exhaust gas flowing into the combustion chamber.

또한, 이러한 엔진(engine)의 측면, 즉 투명재질로 이루어진 실린더 블록의 측면에 CCD나 비디오 카메라(camera)를 설치하고 혼합기를 통해 전파되는 화염의 전파특성을 촬영하게 되면, 화염의 전파특성을 육안으로 측정할 수 있을뿐만 아니라 화염의 전파특성을 기록하여 이를 보다 정확하고 세밀하게 측정/분석할 수 있는 것이다.In addition, when a CCD or a video camera is installed on the side of such an engine, that is, a cylinder block made of a transparent material, and the propagation characteristics of the flame propagated through the mixer are captured, the propagation characteristics of the flame are visually observed. Not only can it be measured, but also the propagation characteristics of the flame can be recorded and measured / analyzed more accurately and precisely.

그러나 연소실 내의 혼합기를 통해 전파되는 화염의 전파특성을 투명재질로이루어진 실린더 블록을 통해서 측정하기 때문에 연소실 내의 전면에 거쳐 화염의 전파특성을 측정하지 못한다는 결점이 있다. 즉, 연소실의 측면에서만 화염의 전파특성을 측정하므로 화염의 전파특성을 정확하게 측정하지 못함은 물론이고, 연소실 내에서의 노크위치를 확인하지 못한다는 결점이 있다.However, since the propagation characteristics of the flame propagated through the mixer in the combustion chamber are measured through a cylinder block made of a transparent material, there is a drawback that the propagation characteristics of the flame cannot be measured across the front surface of the combustion chamber. That is, since the propagation characteristics of the flame are measured only on the side of the combustion chamber, the propagation characteristics of the flame are not accurately measured, and the knock position in the combustion chamber cannot be confirmed.

이에 본 발명은 상기한 바와같은 종래의 결점을 해결하기위해서 제안된 것으로, 피스톤의 상부에 다수개의 이온 프로브를 설치하고, 이를 이용하여 연소실 내의 이온전류를 측정함으로써, 화염의 전파특성과 노크위치를 확인할 수 있도록 된 화염전파 및 노크위치 측정장치를 제공하고자 하는데 그 목적이 있다.The present invention has been proposed to solve the above-mentioned drawbacks, and by installing a plurality of ion probes on the top of the piston and measuring the ion current in the combustion chamber, the propagation characteristics and the knock position of the flame are measured. The purpose of the present invention is to provide a flame propagation and knock position measuring device that can be confirmed.

도 1은 본 발명에 따른 화염전파 및 노크위치 측정장치를 도시한 개략도.1 is a schematic diagram showing a flame propagation and knock position measuring apparatus according to the present invention.

도 2는 본 발명을 달성하기위한 구성 블록도이다.2 is a block diagram illustrating the construction of the present invention.

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

1 : 이온 프로브 2 : 이온전류 증폭기1 ion probe 2 ion current amplifier

3 : A/D 변환기 4 : 처리부3: A / D converter 4: processing part

5 : 출력부 6 : 배기밸브5 output unit 6 exhaust valve

7 : 흡기밸브 8 : 실린더 헤드7: intake valve 8: cylinder head

9 : 연소실 10 : 중간 블록9: combustion chamber 10: intermediate block

11, 15 : 물자켓 12, 16 : 커넥팅 로드11, 15: material jacket 12, 16: connecting rod

13 : 서포트 14 : 호스13: support 14: hose

17 : 실린더 블록 18, 24 : 피스톤17: cylinder block 18, 24: piston

19, 22 : 커버 20, 21 : 링키지19, 22: cover 20, 21: linkage

22 : 인출공22: withdrawal ball

상기한 바와같은 목적을 달성하기위한 본 발명은 연소실 내에 유입되는 혼합기와 이로부터 배출되는 배기가스를 단속하게 되는 흡기밸브와 배기밸브가 설치된 실린더 헤드와, 연소실 내를 왕복하는 피스톤을 커넥팅 로드(conneting rod)에 의해 크랭크 샤프트와 결합되어서 피스톤의 직선 운동을 실린더 블록을 포함하여 구성된 엔진에 있어서, 상부에 다수개의 이온 프로브가 구성되어서 연소실 내의 이온전류를 감지하도록 실린더 헤드와 실린더 블록 사이에 결합된 중간 블록 내에 내입되는 피스톤과, 이 피스톤의 저부에 결합된 커넥팅 로드와 실린더 블록에 내입된 피스톤을 연결하여 주는 서포터(supporter)와, 이 이온 프로브에서 출력되는 이온전류를 인가받아 연소실 내에서의 화염 전파특성과 노크위치를 검출하게 되는 제어수단으로 구성되어짐을 특징으로 한다.The present invention for achieving the above object is a connecting rod connecting the inlet valve and the cylinder head provided with the exhaust valve to intervene the mixer flowing into the combustion chamber and the exhaust gas discharged therefrom, and the piston reciprocating in the combustion chamber (conneting) In an engine comprising a cylinder block coupled to a crankshaft by means of a crankshaft by means of a rod, an intermediate portion coupled between the cylinder head and the cylinder block is configured with a plurality of ion probes configured at the top to sense ion current in the combustion chamber. A propagation of flame in the combustion chamber by receiving a piston embedded in the block, a connecting rod coupled to the bottom of the piston, a supporter for connecting the piston embedded in the cylinder block, and an ion current output from the ion probe. Control means for detecting the characteristics and knock position And a gong.

이하 본 발명의 일 실시예에 따른 구성을 예시도면과 함께 보다 상세히 설명하면 다음과 같다.Hereinafter, the configuration according to an embodiment of the present invention in more detail with an exemplary drawing as follows.

도 1은 본 발명에 따른 화염전파 및 노크위치 측정장치를 도시한 개략도이고, 도 2는 본 발명을 달성하기위한 구성 블록도이다.1 is a schematic view showing a flame propagation and knock position measuring apparatus according to the present invention, Figure 2 is a block diagram for achieving the present invention.

연소실(9) 내에 충진된 혼합기를 통해 전파되는 화염의 전파특성과 착화시 발생되는 노크위치를 검출하기위한 엔진은 도 1에서와 같이, 흡기밸브(7)와 배기밸브(6)를 갖는 실린더 헤드(8)의 하단으로 블록 내에 물자켓(11)이 형성된 중간 블록(10)과, 연소실(9) 내의 배기가스를 배출하기위한 호스(14)가 연결된 커버(19), 그리고 물자켓(15)을 갖는 실린더 블록(17)이 순차적으로 결합되어있다.The engine for detecting the propagation characteristics of the flame propagated through the mixer packed in the combustion chamber 9 and the knocking position generated when ignition has a cylinder head having an intake valve 7 and an exhaust valve 6 as shown in FIG. An intermediate block 10 having a jacket 11 formed in the block at the lower end of the block 8, a cover 19 to which a hose 14 for discharging exhaust gas in the combustion chamber 9 is connected, and a jacket 15. Cylinder blocks 17 having a are sequentially coupled.

중간 블록(10)에 내입되어서 상부에 다수개의 이온 프로브(1)가 형성된 피스톤(24)의 하단에는 커넥팅 로드(12)가 힌지 결합되고, 이 커넥팅 로드(12)의 하단에는 서포터(13)가 플랜지 결합되는 한편, 이 서포터(13)의 하단에는 커넥팅 로드(16)와 힌지 결합된 피스톤(18)이 플랜지 결합되어있다.The connecting rod 12 is hingedly coupled to the lower end of the piston 24, which is embedded in the intermediate block 10 and has a plurality of ion probes 1 formed thereon, and the supporter 13 is attached to the lower end of the connecting rod 12. On the other hand, the lower end of the supporter 13 is flanged to the connecting rod 16 and the piston 18 hinged.

그리고, 커넥팅 로드(12)의 중간에는 다단의 링키지(20)(21)가 힌지 결합되어서 중간 블록(10)의 측면에 형성된 인출공(23)을 통해서 중간 블록(10)의 측면에 나사 결합된 커버(22)에 힌지 결합되고, 다수개의 이온 프로브(1)에 연결되는 전송라인은 이 링키지(20)(21)에 고정되어서 외부로 인출되도록 한다. 즉, 중간 블록(10) 내에서 전송라인이 단선되는 것을 방지한다.In addition, the linkages 20 and 21 of the plurality of stages are hinged to the middle of the connecting rod 12 and screwed to the side of the intermediate block 10 through the outlet holes 23 formed on the side of the intermediate block 10. A transmission line hinged to the cover 22 and connected to the plurality of ion probes 1 is fixed to the linkages 20 and 21 to be drawn out. That is, the transmission line is prevented from being disconnected in the intermediate block 10.

이때 중간 블록(10)의 측면에 형성된 인출공(23)은 링키지(20)(21)가 커넥팅 로드(12)의 상하 운동에 연동되게 작동 가능하도록 중간 블록(10)의 외측보다 내측의 직경이 크게 형성되어있다.At this time, the outlet hole 23 formed on the side of the intermediate block 10 has a diameter of an inner side than the outside of the intermediate block 10 so that the linkage 20 and 21 can be operated in conjunction with the vertical movement of the connecting rod 12. It is largely formed.

이렇게 외부로 인출된 전송라인은 이온전류를 증폭하는 이온전류 증폭기(2)가 연결되고, 이 이온전류 증폭기(2)는 아날로그의 이온전류를 디지털로 변환하는 A/D 변환기(3)가 연결되며, 이 A/D 변환기(3)에서 출력되는 이온전류를 인가받은 처리부(4)는 이온전류에 의해 연소실(9)에 충진된 혼합기를 통해서 전파되는 화염의 전파상태와 착화시 발생되는 노크위치를 판단할 수 있도록 구성되어있다. 이때 처리부(4)에는 화염의 전파상태와 노크위치를 출력하기위한 출력부(5)가 접속되어있다.The outgoing transmission line is connected to an ion current amplifier 2 for amplifying an ion current, and the ion current amplifier 2 is connected to an A / D converter 3 for converting an analog ion current to digital. The processing unit 4 receiving the ion current output from the A / D converter 3 has a propagation state of the flame propagated through the mixer packed in the combustion chamber 9 by the ion current and the knock position generated when ignition. It is configured to judge. At this time, the processing section 4 is connected to an output section 5 for outputting the flame propagation state and the knock position.

이와같이 구성된 본 발명의 동작을 설명한다.The operation of the present invention configured as described above will be described.

흡기밸브(7)가 열리면서 연소실(9) 내에 혼합기가 유입된 후 점화 플러그의 동작으로 착화되면, 점화 플러그에서 발생된 화염이 혼합기를 통해서 연소실(9) 내로 전파되게 된다. 이에따라 연소실(9) 내부공기가 팽창되면서 피스톤(24)과 커넥팅 로드(12), 서포트(13) 그리고 피스톤(18)을 통해서 커넥팅 로드(16)에 전달되어 크랭크 샤프트가 회전 운동하게 된다.When the intake valve 7 is opened and the mixer is introduced into the combustion chamber 9 and then ignited by the operation of the spark plug, the flame generated from the spark plug is propagated into the combustion chamber 9 through the mixer. Accordingly, as the air inside the combustion chamber 9 is expanded, it is transmitted to the connecting rod 16 through the piston 24, the connecting rod 12, the support 13, and the piston 18 so that the crankshaft rotates.

그리고, 피스톤(24)의 상부에 형성된 이온 프로브(1)에 의해 감지되는 이온전류는 전송라인을 통해서 이온전류 증폭기(2)에 인가된 후 증폭되어서 A/D 변환기(3)에 공급되게 된다. 이렇게 A/D 증폭기(2)에 의해 증폭된 이온전류를 인가받은 처리부(4)는 연소실(9) 내의 혼합기를 통해서 전파되는 화염의 전파특성과 피스톤(24)의 상면에서 일어나는 노크현상의 위치를 확인할 수 있는 것이다.In addition, the ion current sensed by the ion probe 1 formed on the upper part of the piston 24 is applied to the ion current amplifier 2 through the transmission line and then amplified to be supplied to the A / D converter 3. The processing unit 4 receiving the ion current amplified by the A / D amplifier 2 thus measures the propagation characteristics of the flame propagated through the mixer in the combustion chamber 9 and the position of knock phenomenon occurring on the upper surface of the piston 24. You can check.

이상에서와 같이 본 발명은 피스톤의 상면에 다수개의 이온 프로브를 설치하여 착화시 발생되는 이온전류를 감지하고, 이를 분석하여 화염의 전파특성과 노크현상이 일어나는 위치를 확인함으로써, 엔진의 변경을 최소화하면서 양질의 화염의 전파특성에 대한 데이터와 노크현상이 일어나는 위치에 대한 데이터를 얻을 수 있는 것이다.As described above, the present invention installs a plurality of ion probes on the upper surface of the piston to detect the ion current generated during ignition, and analyzes this to identify the propagation characteristics of the flame and the position where the knock phenomenon occurs, thereby minimizing the change of the engine At the same time, it is possible to obtain data on the propagation characteristics of high-quality flames and the location of knock phenomenon.

Claims (6)

연소실 내에 유입되는 혼합기와 이로부터 배출되는 배기가스를 단속하게 되는 흡기밸브와 배기밸브가 설치된 실린더 헤드와, 연소실 내를 왕복하는 피스톤을 커넥팅 로드에 의해 크랭크 샤프트와 결합되어서 피스톤의 직선 운동을 실린더 블록을 포함하여 구성된 엔진에 있어서,The cylinder block provided with an intake valve and an exhaust valve for intermitting the mixer and the exhaust gas discharged from the combustion chamber, and a piston reciprocating in the combustion chamber are combined with the crankshaft by connecting rods to perform linear movement of the piston. In the engine configured to include, 상부에 다수개의 이온 프로브가 구성되어서 연소실 내의 이온전류를 감지하도록 실린더 헤드와 실린더 블록 사이에 결합된 중간 블록 내에 내입되는 피스톤과;A piston which is configured in the upper part and is embedded in an intermediate block coupled between the cylinder head and the cylinder block to sense ion current in the combustion chamber; 이 피스톤의 저부에 결합된 커넥팅 로드와 실린더 블록에 내입된 피스톤을 연결하여 주는 서포터;A supporter for connecting the connecting rod coupled to the bottom of the piston and the piston embedded in the cylinder block; 이 이온 프로브에서 출력되는 이온전류를 인가받아 연소실 내에서의 화염 전파특성과 노크위치를 검출하게 되는 처리수단으로 구성되어짐을 특징으로 하는 화염전파 및 노크위치 측정장치.A flame propagation and knock position measuring device comprising: a processing means for detecting a flame propagation characteristic and a knock position in a combustion chamber by receiving an ion current output from the ion probe; 제 1항에 있어서, 중간 블록의 측면에는 이를 관통되는 인출공이 형성되고, 이 인출공을 감싸면서 커버가 중간블록의 측면에 고정되며, 이 커버와 커넥팅 로드를 연결하는 다단의 링키지가 힌지 결합되는 한편, 이온 프로브에 연결된 전송라인이 링키지에 고정되면서 처리수단을 연결되어짐을 특징으로 하는 화염전파 및 노크위치 측정장치.The method of claim 1, wherein the side of the intermediate block is formed with a through hole penetrating it, the cover is fixed to the side of the intermediate block while surrounding the outlet hole, the multi-stage linkage connecting the cover and the connecting rod is hinged On the other hand, flame propagation and knock position measuring apparatus characterized in that the transmission line connected to the ion probe is connected to the processing means while being fixed to the linkage. 제 2항에 있어서, 중간 블록의 측면에 형성된 인출공은 커버에 힌지 결합된 다단의 링키지가 커넥팅 로드의 상하운동에 연동되어서 작동 가능하도록 중간 블록의 외측보다 내측의 반경이 크게 형성되어짐을 특징으로 하는 화염전파 및 노크위치 측정장치.According to claim 2, The outlet hole formed in the side of the intermediate block has a larger inner radius than the outside of the intermediate block so that the multi-stage linkage hinged to the cover can operate in conjunction with the vertical movement of the connecting rod. Flame propagation and knock position measuring device. 제 1항에 있어서, 실린더 블록과 중간 블록 내에는 냉각수가 순환되는 물자켓이 형성되어서 연소시 발생되는 연소열을 냉각하도록 함을 특징으로 하는 화염전파 및 노크위치 측정장치.The flame propagation and knock position measuring apparatus according to claim 1, wherein an inner jacket in which the coolant is circulated is formed in the cylinder block and the intermediate block to cool the combustion heat generated during combustion. 제 1항에 있어서, 이 중간블록과 실린더 블록의 사이에는 가스를 배출하기위한 호스가 측면에 연결된 커버가 연결되어짐을 특징으로 하는 화염전파 및 노크위치 측정장치.The flame propagation and knock position measuring apparatus according to claim 1, wherein a cover is connected between the intermediate block and the cylinder block, the hose for discharging gas, connected to the side. 제 1항에 있어서, 이 서포트의 양단에 결합되는 커넥팅 로드와 피스톤이 각각 플랜지 이음되어짐을 특징으로 하는 화염전파 및 노크위치 측정장치.The apparatus of claim 1, wherein the connecting rod and the piston coupled to both ends of the support are flanged, respectively.
KR1019970058611A 1997-11-06 1997-11-06 Determination device of flame velocity and knock position KR100257022B1 (en)

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