JP2001017889A - Apparatus and method for inspecting injection hole - Google Patents
Apparatus and method for inspecting injection holeInfo
- Publication number
- JP2001017889A JP2001017889A JP11194328A JP19432899A JP2001017889A JP 2001017889 A JP2001017889 A JP 2001017889A JP 11194328 A JP11194328 A JP 11194328A JP 19432899 A JP19432899 A JP 19432899A JP 2001017889 A JP2001017889 A JP 2001017889A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- injection hole
- injection
- measured
- pressure
- 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
Links
Landscapes
- Testing Of Engines (AREA)
- Nozzles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、噴孔から噴射され
る液柱を測定することにより噴孔の加工状態を検査する
噴孔検査装置および噴孔検査方法に関する。液柱とは、
噴孔から噴射されても霧状にならずに進行する柱状の液
体を表す。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection hole inspection apparatus and an injection hole inspection method for inspecting a processing state of an injection hole by measuring a liquid column injected from the injection hole. What is a liquid column?
It represents a columnar liquid that travels without being atomized even when injected from the injection hole.
【０００２】[0002]
【従来の技術】近年、環境汚染防止の観点から排ガス低
減、燃費向上等の要望がなされている。内燃機関（以
下、「内燃機関」をエンジンという。）に用いられる燃
料噴射装置の噴孔から燃料を噴射して形成する噴霧の濃
度や拡散状態は、排ガス低減、燃費向上に深く関係して
いる。そこで、特開平１０−１４８５９９号公報に開示
されるように、燃料噴霧を検査する装置および方法が種
々開示されている。2. Description of the Related Art In recent years, there has been a demand for reduction of exhaust gas and improvement of fuel efficiency from the viewpoint of prevention of environmental pollution. The concentration and diffusion state of a spray formed by injecting fuel from an injection hole of a fuel injection device used for an internal combustion engine (hereinafter, an “internal combustion engine” is referred to as an engine) are closely related to reduction of exhaust gas and improvement of fuel efficiency. . Therefore, as disclosed in JP-A-10-148599, various apparatuses and methods for inspecting fuel spray have been disclosed.
【０００３】噴霧特性は燃料を噴射する噴孔の加工状
態、つまり噴孔の数、噴射位置を決定する噴孔の傾斜角
度および形成位置、噴孔の大きさおよび形状等により変
動するので、噴霧特性に加え、噴孔の加工状態を正確に
検査することが重要である。しかし、燃料噴射装置から
液体を噴射しその噴霧を測定しても、噴孔の加工状態を
検査することはできない。The spray characteristics vary depending on the processing state of the injection holes for injecting fuel, that is, the number of injection holes, the inclination angle and formation position of the injection holes that determine the injection position, the size and shape of the injection holes, etc. In addition to the characteristics, it is important to accurately inspect the processing state of the injection hole. However, even if the liquid is injected from the fuel injection device and the spray is measured, the processing state of the injection hole cannot be inspected.
【０００４】従来、噴孔の加工状態の検査は、次のお
よびの方法により行われることが一般的である。燃
料噴射装置の外側から表面的な噴孔の形状を顕微鏡等で
拡大し観察する。噴孔を有するノズル部を切断し、噴
孔内部の形状、向き、燃料上流側の燃料通路と噴孔との
相対位置関係を測定する。Conventionally, the inspection of the processing state of the injection hole is generally performed by the following methods. The shape of the superficial injection hole from the outside of the fuel injection device is enlarged and observed with a microscope or the like. A nozzle having an injection hole is cut, and the shape and orientation of the inside of the injection hole and the relative positional relationship between the fuel passage on the fuel upstream side and the injection hole are measured.
【０００５】[0005]
【発明が解決しようとする課題】前述したの方法で
は、噴孔内部の形状が検査不能である。の方法では、
ノズル部を切断するので良品であっても製品として使用
不能になる。さらに、検査に長い時間を要するという問
題がある。また、多数の噴孔を有する燃料噴射装置の場
合、の方法によってすべての噴孔を検査することは困
難である。本発明の目的は、噴射装置を破損させること
なく、噴孔の加工状態を高精度に検査する噴孔検査装置
および噴孔検査方法を提供することにある。In the above-mentioned method, the shape inside the injection hole cannot be inspected. In the method,
Since the nozzle portion is cut, even a good product cannot be used as a product. Further, there is a problem that a long time is required for the inspection. In the case of a fuel injection device having a large number of injection holes, it is difficult to inspect all the injection holes by the above method. An object of the present invention is to provide an injection hole inspection device and an injection hole inspection method for inspecting the processing state of an injection hole with high accuracy without damaging the injection device.
【０００６】[0006]
【課題を解決するための手段】本発明の請求項１記載の
噴孔検査装置によると、液体供給装置から噴射装置に供
給される液体の圧力は、噴孔から液柱状に液体を噴射さ
せるように設定されている。この液柱を平面状のシート
光に照射された被測定断面において測定し噴孔の加工状
態を検査している。被測定断面における液柱を測定する
ことにより、噴孔の数、噴孔の傾斜角度および形成
位置、噴孔の大きさおよび形状を検査できる。したが
って、噴孔を有するノズル部を切断することなく、噴孔
内部を含む噴孔の加工状態を、短時間で容易に高精度に
検査できる。多孔式の燃料噴射装置であっても各噴孔か
ら噴射される液柱は互いに衝突しないので、各噴孔の加
工状態について高精度に検査できる。さらに、検査が容
易であるから、抜き取り検査ではなく全数検査が可能に
なる。According to the injection hole inspection apparatus of the present invention, the pressure of the liquid supplied from the liquid supply device to the injection device is such that the liquid is jetted from the injection hole into a liquid column. Is set to This liquid column is measured at the section to be measured irradiated with the flat sheet light, and the processing state of the nozzle hole is inspected. By measuring the liquid column in the cross section to be measured, the number of injection holes, the inclination angle and formation position of the injection holes, and the size and shape of the injection holes can be inspected. Therefore, the processing state of the injection hole including the inside of the injection hole can be easily and accurately inspected in a short time without cutting the nozzle portion having the injection hole. Even in a porous fuel injection device, the liquid columns injected from the injection holes do not collide with each other, so that the processing state of each injection hole can be inspected with high accuracy. Furthermore, since the inspection is easy, not only the sampling inspection but also the whole inspection can be performed.
【０００７】本発明の請求項２記載の噴孔検査装置によ
ると、噴孔から噴射される液体の噴射圧を噴射装置の実
使用時よりも低くし、噴射される液体を液柱にしてい
る。本発明の請求項３記載の噴孔検査装置は、内燃機関
用燃料噴射装置の噴孔の加工状態を検査するために請求
項２記載の噴孔検査装置を用いたものである。燃料噴射
装置の実使用時よりも噴射圧を低くし、０．５ｋｇｆ／
ｃｍ2〜１．２ｋｇｆ／ｃｍ2の圧力で液体を噴射するこ
とにより液体を噴霧ではなく液柱にしている。According to the injection hole inspection apparatus according to the second aspect of the present invention, the injection pressure of the liquid ejected from the injection hole is made lower than when the injection apparatus is actually used, and the liquid to be ejected is made a liquid column. . An injection hole inspection device according to a third aspect of the present invention uses the injection hole inspection device according to the second aspect to inspect a processing state of an injection hole of a fuel injection device for an internal combustion engine. The injection pressure is made lower than when the fuel injection device is actually used, and 0.5 kgf /
By injecting the liquid at a pressure of cm 2 to 1.2 kgf / cm 2 , the liquid is formed into a liquid column instead of a spray.
【０００８】本発明の請求項４記載の噴孔検査方法によ
ると、噴孔から噴射される液柱を平面状のシート光に照
射された被測定断面において測定することにより噴孔の
加工状態を検査している。液柱を測定することにより、
噴孔の数、噴孔の傾斜角度および形成位置、噴孔
の大きさおよび形状を検査できる。したがって、噴孔を
有するノズル部を切断することなく、噴孔内部を含む噴
孔の加工状態を、短時間で容易に高精度に検査できる。According to the nozzle hole inspection method according to the fourth aspect of the present invention, the processing state of the nozzle hole is measured by measuring the liquid column ejected from the nozzle hole in the section to be measured irradiated with the flat sheet light. Inspection. By measuring the liquid column,
The number of injection holes, the inclination angle and formation position of injection holes, and the size and shape of injection holes can be inspected. Therefore, the processing state of the injection hole including the inside of the injection hole can be easily and accurately inspected in a short time without cutting the nozzle portion having the injection hole.
【０００９】本発明の請求項５記載の噴孔検査方法によ
ると、実使用時よりも噴射時間を長くすることにより、
噴射期間に撮像期間を容易に合わせることができる。本
発明の請求項６記載の噴孔検査方法によると、液柱の被
測定断面を記録する撮像部の露光時間が長い。露光時間
が短いと、露光時間内において瞬間的にずれた液柱の位
置を噴射位置として測定する恐れがある。露光時間を長
くすることにより、露光時間内においてずれる液柱の位
置を平均することができるので、噴射位置を高精度に求
め、噴孔の傾斜角度および形成位置を高精度に検査でき
る。According to the injection hole inspection method according to the fifth aspect of the present invention, by making the injection time longer than in actual use,
The imaging period can be easily adjusted to the ejection period. According to the injection hole inspection method according to the sixth aspect of the present invention, the exposure time of the imaging unit for recording the measured section of the liquid column is long. If the exposure time is short, there is a possibility that the position of the liquid column that is instantaneously shifted within the exposure time may be measured as the ejection position. By lengthening the exposure time, the positions of the liquid columns that are shifted during the exposure time can be averaged, so that the injection position can be determined with high accuracy, and the inclination angle and the formation position of the injection hole can be inspected with high accuracy.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を示す
実施例を図に基づいて説明する。本発明の一実施例によ
る噴孔検査装置を図１に示す。本実施例による噴孔検査
装置は、ガソリンエンジン用燃料噴射装置１の噴孔の加
工状態を検査する装置である。噴孔検査装置は、液体供
給装置１０、第１投光部２０、第２投光部３０、撮像部
４０、データ処理部５０を備えており、レーザシート光
によって照射される燃料の液柱から発散される散乱光の
強度を測定することにより各噴孔の加工状態を検査する
装置である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 1 shows an injection hole inspection apparatus according to an embodiment of the present invention. The injection hole inspection apparatus according to the present embodiment is an apparatus for inspecting a processing state of an injection hole of the fuel injection device 1 for a gasoline engine. The injection hole inspection apparatus includes a liquid supply device 10, a first light projecting unit 20, a second light projecting unit 30, an imaging unit 40, and a data processing unit 50. This is an apparatus for inspecting the processing state of each injection hole by measuring the intensity of scattered scattered light.
【００１１】燃料噴射装置１は合計１２個の噴孔を有
し、６個ずつの噴孔により２方向噴射を行う。液体供給
装置１０は、測定用の液体であるドライソルベルトの圧
力を調圧し燃料噴射装置１に供給する装置である。液体
供給装置１０は、液体ポンプ、調圧弁および圧力計等を
有し、調圧弁で調圧された出力圧を圧力計で測定するこ
とにより燃料噴射装置１に供給する液体の圧力を調圧す
る。燃料噴射装置１は、液体供給装置１０から供給され
る液体を噴霧ではなく液柱２、３として各噴孔から噴射
する。ドライソルベルトは、粘度がガソリンとほぼ等し
く引火しにくいので、燃料噴射装置の噴射検査用に一般
に用いられている。The fuel injection device 1 has a total of twelve injection holes, and performs two-way injection by six injection holes. The liquid supply device 10 is a device that regulates the pressure of a dry sorber, which is a liquid for measurement, and supplies the pressure to the fuel injection device 1. The liquid supply device 10 includes a liquid pump, a pressure regulating valve, a pressure gauge, and the like, and regulates the pressure of the liquid supplied to the fuel injection device 1 by measuring the output pressure regulated by the pressure regulating valve with a pressure gauge. The fuel injection device 1 injects the liquid supplied from the liquid supply device 10 from each injection hole as liquid columns 2 and 3 instead of spraying. Dry sorber has a viscosity almost equal to that of gasoline and is difficult to ignite, so that it is generally used for injection inspection of a fuel injection device.
【００１２】第１投光部２０および第２投光部３０は、
それぞれが投光するレーザシート光が液柱２、３の被測
定断面で重なるように液柱２、３の両側に向かい合って
設置されている。第１投光部２０および第２投光部３０
は実質的に同じ構成であり、それぞれ半導体レーザ発振
器２１、３１、ならびに円筒面レンズの組み合わせから
なるテレセントリック光学系を応用したシート化手段２
２、３２を備えている。シート化手段２２、３２は、半
導体レーザ発振器２１、３１が発生するレーザビーム
を、所定の広がりと厚みをもち、被測定断面と平行な面
における強度が面均一な平面状のレーザシート光に加工
して出力する。The first light projecting unit 20 and the second light projecting unit 30
The laser sheet light projected from each of the liquid columns 2 and 3 is installed to face both sides of the liquid columns 2 and 3 so as to overlap at the measured section. First light emitting unit 20 and second light emitting unit 30
Have substantially the same configuration, and each has a semiconductor laser oscillator 21, 31 and a sheet forming means 2 using a telecentric optical system composed of a combination of cylindrical lenses.
2, 32 are provided. The sheeting means 22 and 32 process the laser beam generated by the semiconductor laser oscillators 21 and 31 into a planar laser sheet light having a predetermined spread and thickness, and having a uniform intensity on a plane parallel to the section to be measured. And output.
【００１３】撮像部４０は、被測定断面よりも燃料噴射
装置１の噴孔側に設置され、燃料噴射装置１の軸に対し
４５度の角度から液柱２、３の被測定断面を撮影する。
撮像部４０は集光レンズ、ＣＣＤ等を備え、被測定断面
における液柱の散乱光を受光して光電変換することによ
りデータ処理部５０に散乱光の強度を表わすデータ信号
を送信する。The imaging section 40 is installed on the injection hole side of the fuel injection device 1 with respect to the measured cross section, and photographs the measured cross section of the liquid columns 2 and 3 from an angle of 45 degrees with respect to the axis of the fuel injection device 1. .
The imaging unit 40 includes a condenser lens, a CCD, and the like, and receives the scattered light of the liquid column in the section to be measured and performs photoelectric conversion, thereby transmitting a data signal representing the intensity of the scattered light to the data processing unit 50.
【００１４】データ処理部５０は、撮像部４０から入力
したデータ信号を所定のアルゴリズムに従い処理するマ
イクロコンピュータを有する。表示装置５１はデータ処
理部５０に接続され、図２に示すようにレーザシート光
１００により照射された被測定断面における液柱の断面
形状が画面に表示される。The data processing section 50 has a microcomputer for processing a data signal input from the imaging section 40 according to a predetermined algorithm. The display device 51 is connected to the data processing unit 50, and as shown in FIG. 2, the cross-sectional shape of the liquid column at the measured cross section irradiated by the laser sheet light 100 is displayed on the screen.
【００１５】以下、上述の噴孔検査装置の作動について
説明する。噴孔から被測定断面までの距離を決めて燃料
噴射装置１を設置し、所定時刻に液体を噴射させる。液
体供給装置１０から燃料噴射装置１に供給される液体の
圧力は、実使用時に燃料噴射装置１からガソリンを噴射
する圧力（約３ｋｇｆ／ｃｍ2）よりも低く、０．５ｋ
ｇｆ／ｃｍ2〜１．２ｋｇｆ／ｃｍ2の範囲に設定されて
いる。本実施例では、０．８ｋｇｆ／ｃｍ2に設定して
いる。このように実使用時よりも噴射圧を低下させるこ
とにより、各噴孔から噴霧ではなく液柱として液体が噴
射される。The operation of the above-described injection hole inspection apparatus will be described below. The fuel injection device 1 is installed with the distance from the injection hole to the section to be measured, and the liquid is injected at a predetermined time. The pressure of the liquid supplied from the liquid supply device 10 to the fuel injection device 1 is lower than the pressure (about 3 kgf / cm 2 ) for injecting gasoline from the fuel injection device 1 during actual use, and is 0.5 k
It is set in the range of gf / cm 2 to 1.2 kgf / cm 2 . In this embodiment, it is set to 0.8 kgf / cm 2 . In this way, by lowering the injection pressure than in actual use, the liquid is ejected from each injection hole as a liquid column instead of a spray.
【００１６】燃料噴射装置１から噴射される噴射時間
は、実使用時における燃料噴射装置１の噴射時間よりも
長く設定してある。撮像部４０で液柱２、３を撮影する
露光時間と噴射時間とを合わせ易くなっている。例えば
撮像部４０による複数回の連続する撮影中、液体を噴射
し続けることも可能である。噴射から所定時間経過後同
時に第１投光部２０および第２投光部３０から液柱２、
３にレーザシート光を投光する。The injection time of the fuel injection device 1 is set longer than the injection time of the fuel injection device 1 in actual use. The exposure time and the ejection time for photographing the liquid columns 2 and 3 by the imaging unit 40 are easily adjusted. For example, it is also possible to keep ejecting the liquid during a plurality of continuous shootings by the imaging unit 40. After a lapse of a predetermined time from the ejection, the liquid column 2 and the liquid
A laser sheet light is projected on 3.
【００１７】半導体レーザ発振器２１、３１に送出する
制御信号を調整することにより、第１投光部２０および
第２投光部３０はレーザシート光をパルス光または連続
光として出力できる。第１投光部２０および第２投光部
３０から投光されるレーザシート光は、液柱２、３の進
行方向に垂直な平面状の光であって、液柱２、３を被測
定断面で切断するように液柱２、３に進入する。それぞ
れのレーザシート光は、液柱２、３を通過することによ
り減衰しながら進む。第１投光部２０および第２投光部
３０が被測定断面で重なるように反対方向から相手に向
けてレーザシート光を照射することにより、被測定断面
においてほぼ均一な強度のレーザシート光を形成でき
る。By adjusting the control signals sent to the semiconductor laser oscillators 21 and 31, the first light projecting unit 20 and the second light projecting unit 30 can output laser sheet light as pulsed light or continuous light. The laser sheet light emitted from the first light projecting unit 20 and the second light projecting unit 30 is a planar light perpendicular to the traveling direction of the liquid columns 2 and 3, and measures the liquid columns 2 and 3 to be measured. The liquid columns 2 and 3 enter so as to be cut in a cross section. Each laser sheet light travels while being attenuated by passing through the liquid columns 2 and 3. By irradiating the laser sheet light from the opposite direction to the partner so that the first light projecting unit 20 and the second light projecting unit 30 overlap in the measured section, the laser sheet light having substantially uniform intensity in the measured section is obtained. Can be formed.
【００１８】レーザシート光を受光した液柱２、３は、
全方向に散乱光を発散する。散乱光を受光した撮像部４
０は、散乱光の強度を表わすデータ信号をデータ処理部
５０に送信する。撮像部４０の露光時間は、１／１００
〜１／２秒の範囲で設定されている。液柱２、３の噴射
位置は一点にとどまっておらず、液柱同士で衝突するこ
となく或る範囲内でばらついている。したがって、前述
した時間内で露光時間を長くすることにより、露光時間
内においてばらつく各液柱２、３の噴射位置を平均し、
各液柱２、３の噴射位置を高精度に測定できる。液柱
２、３の噴射位置を測定することにより、噴孔の傾斜角
度および形成位置を高精度に検査できる。前述した時間
内で露光時間を短くすると、液柱２、３の噴射位置のば
らつきが小さいので、液柱２、３の噴射位置を高精度に
測定できなくなる恐れはある。しかし、各液柱２、３の
噴射位置のばらつきが小さくなるので、被測定断面にお
いて各液柱２、３の大きさおよび形状、つまり各噴孔の
大きさおよび形状を高精度に検査できる。The liquid columns 2 and 3 receiving the laser sheet light are:
Emit scattered light in all directions. The imaging unit 4 that has received the scattered light
0 transmits a data signal representing the intensity of the scattered light to the data processing unit 50. The exposure time of the imaging unit 40 is 1/100
It is set in the range of １ ／ second. The injection positions of the liquid columns 2 and 3 are not limited to one point, but vary within a certain range without collision between the liquid columns. Therefore, by prolonging the exposure time within the above-described time, the ejection positions of the liquid columns 2, 3 that vary during the exposure time are averaged,
The injection positions of the liquid columns 2 and 3 can be measured with high accuracy. By measuring the injection position of the liquid columns 2 and 3, the inclination angle and the formation position of the injection hole can be inspected with high accuracy. If the exposure time is shortened within the above-mentioned time, the dispersion of the ejection positions of the liquid columns 2 and 3 is small, so that the ejection positions of the liquid columns 2 and 3 may not be measured with high accuracy. However, since the dispersion of the ejection positions of the liquid columns 2 and 3 is reduced, the size and shape of the liquid columns 2 and 3 in the measured cross section, that is, the size and shape of each injection hole can be inspected with high accuracy.
【００１９】データ処理部５０は、撮像部４０から受信
したデータ信号に対し、燃料噴射装置１の軸方向と撮像
部４０が被測定断面を撮影する角度に基づいて座標の補
正を幾何学的に実行する。すなわち、被測定断面を斜め
方向から撮影することに起因して被測定断面において円
周上に六角形状に分布する液柱２、３が歪んで撮影され
ているため、これを補正するための処理を実行する。撮
像部４０で複数回撮影した散乱光の画像データをデータ
処理部５０に入力し、各撮像点における画像データを平
均して散乱光のばらつきを低減してもよい。データ処理
部５０で上述の処理によって算出された測定値は表示装
置５１にデータ信号として送信され、表示装置５１の画
面上に被測定断面上の液柱画像が表示される。The data processing unit 50 geometrically corrects the coordinates of the data signal received from the imaging unit 40 based on the axial direction of the fuel injection device 1 and the angle at which the imaging unit 40 photographs the section to be measured. Execute. That is, since the liquid columns 2 and 3 distributed in a hexagonal shape on the circumference of the measured cross section are distorted due to the photographing of the measured cross section from an oblique direction, the processing for correcting this is performed. Execute The image data of the scattered light photographed a plurality of times by the imaging unit 40 may be input to the data processing unit 50, and the image data at each imaging point may be averaged to reduce variations in the scattered light. The measurement value calculated by the above-described processing in the data processing unit 50 is transmitted to the display device 51 as a data signal, and the liquid column image on the measured section is displayed on the screen of the display device 51.
【００２０】本実施例による噴孔検査装置および噴孔検
査方法によると、燃料噴射装置１から噴射する液体を噴
霧ではなく液柱にし、液柱の被測定断面を測定すること
により、噴孔数、噴孔の傾斜角度および形成位置、噴孔
の大きさおよび形状を燃料噴射装置を切断することな
く、短時間に、容易に、高精度に検査できる。According to the injection hole inspection apparatus and the injection hole inspection method according to the present embodiment, the liquid injected from the fuel injection device 1 is formed into a liquid column instead of a spray, and the measured cross section of the liquid column is measured. In addition, the inclination angle and formation position of the injection hole, and the size and shape of the injection hole can be inspected in a short time, easily and with high accuracy without cutting the fuel injection device.
【００２１】また、互いに向き合う２方向からレーザシ
ート光を液柱に投光するため、液柱によるレーザシート
光の減衰に起因する測定誤差を減少し、解析精度の高い
測定をすることができる。またさらに、テレセントリッ
ク光学系を応用したシート化手段２２、３２を用いてレ
ーザシート光を投光するため、レーザシート光の強度む
らによる測定誤差を減少させ、解析精度の高い測定をす
ることができる。Further, since the laser sheet light is projected onto the liquid column from two directions facing each other, a measurement error caused by attenuation of the laser sheet light by the liquid column is reduced, and measurement with high analysis accuracy can be performed. Furthermore, since the laser sheet light is projected using the sheeting means 22 and 32 to which the telecentric optical system is applied, measurement errors due to unevenness in the intensity of the laser sheet light can be reduced, and measurement with high analysis accuracy can be performed. .
【００２２】本実施例では、第１投光部２０および第２
投光部３０を用いて液柱にレーザシート光を照射した。
しかし、１つの投光部で液柱にレーザシート光を照射し
てもよい。また、燃料噴射装置１の軸に対し、ほぼ対称
な位置にそれぞれ撮像部４０を配置し、被測定断面にお
ける液柱の像を撮影してもよい。In this embodiment, the first light emitting section 20 and the second
The liquid column was irradiated with the laser sheet light using the light projecting unit 30.
However, the liquid column may be irradiated with the laser sheet light by one light projecting unit. Alternatively, the imaging units 40 may be arranged at substantially symmetrical positions with respect to the axis of the fuel injection device 1 to capture an image of the liquid column in the section to be measured.
【図１】本発明の一実施例による噴孔検査装置を示すブ
ロック図である。FIG. 1 is a block diagram showing an injection hole inspection apparatus according to one embodiment of the present invention.
【図２】被測定面における液柱の位置を示す説明図であ
る。FIG. 2 is an explanatory diagram showing a position of a liquid column on a surface to be measured.
１ 燃料噴射装置 １０ 液体供給装置 ２０ 第１投光部 ３０ 第２投光部 ４０ 撮像部 ５０ データ処理部 １００ レーザシート光 REFERENCE SIGNS LIST 1 fuel injection device 10 liquid supply device 20 first light emitting unit 30 second light emitting unit 40 imaging unit 50 data processing unit 100 laser sheet light
Claims (6)
態を検査する噴孔検査装置であって、 前記噴射装置に液体を供給する液体供給装置と、前記噴
孔から噴射される液体の被測定断面に重なるように所定
の厚みと広がりを有する平面状のシート光を照射する投
光部と、前記シート光で照射された前記被測定断面の像
を記録する撮像部と、前記撮像部で記録した前記像を解
析するデータ処理部とを備え、 前記液体供給装置から前記噴射装置に供給する液体の圧
力は、前記噴孔から液柱状に液体を噴射させるように設
定されていることを特徴とする噴孔検査装置。1. An injection hole inspection device for inspecting a processing state of an injection hole formed in an injection device, comprising: a liquid supply device for supplying a liquid to the injection device; A light projecting unit that irradiates a planar sheet light having a predetermined thickness and spread so as to overlap the measured section, an imaging unit that records an image of the measured section irradiated with the sheet light, and the imaging unit A data processing unit for analyzing the image recorded in the above, wherein the pressure of the liquid supplied from the liquid supply device to the ejection device is set to eject the liquid from the ejection hole in a liquid column shape. Injection hole inspection device.
記噴射装置の実使用時よりも低いことを特徴とする請求
項１記載の噴孔検査装置。2. The injection hole inspection apparatus according to claim 1, wherein the pressure of the liquid injected from the injection hole is lower than the pressure at the time of actual use of the injection device.
態を検査する噴孔検査装置として用い、０．５ｋｇｆ／
ｃｍ2〜１．２ｋｇｆ／ｃｍ2の圧力で液体を噴射させる
ことを特徴とする請求項２記載の噴孔検査装置。3. An injection hole inspection device for inspecting a machining state of an injection hole of a fuel injection device for an internal combustion engine.
injection hole inspection apparatus according to claim 2, wherein the jetting fluid at a pressure of cm 2 ~1.2kgf / cm 2.
させ、所定の厚みと広がりを有する平面状のシート光に
照射された被測定断面における液柱を測定することによ
り噴孔の加工状態を検査することを特徴とする噴孔検査
方法。4. Processing of the injection hole by injecting liquid into a liquid column from the injection hole of the injection device, and measuring the liquid column in the section to be measured irradiated with a flat sheet light having a predetermined thickness and spread. An injection hole inspection method characterized by inspecting a state.
を長くすることを特徴とする請求項４記載の噴孔検査方
法。5. The injection hole inspection method according to claim 4, wherein the injection time of the injection device is set longer than in actual use.
する撮像部の露光時間を長くすることを特徴とする請求
項５記載の噴孔検査方法。6. The injection hole inspection method according to claim 5, wherein an exposure time of an imaging unit for recording an image of the liquid column in the section to be measured is lengthened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19432899A JP3666561B2 (en) | 1999-07-08 | 1999-07-08 | Injection hole inspection apparatus and injection hole inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19432899A JP3666561B2 (en) | 1999-07-08 | 1999-07-08 | Injection hole inspection apparatus and injection hole inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001017889A true JP2001017889A (en) | 2001-01-23 |
| JP3666561B2 JP3666561B2 (en) | 2005-06-29 |
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ID=16322773
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19432899A Expired - Fee Related JP3666561B2 (en) | 1999-07-08 | 1999-07-08 | Injection hole inspection apparatus and injection hole inspection method |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010107895A2 (en) * | 2009-03-17 | 2010-09-23 | Proveris Scientific Corporation | Spray angle measurement apparatus and method |
| WO2012055078A1 (en) * | 2010-10-25 | 2012-05-03 | 大连德新机电技术工程有限公司 | Piston fuel-injector detection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329200A (en) * | 2014-08-21 | 2015-02-04 | 陈锦华 | Diesel engine oil sprayer oil spraying condition observing device |
-
1999
- 1999-07-08 JP JP19432899A patent/JP3666561B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010107895A2 (en) * | 2009-03-17 | 2010-09-23 | Proveris Scientific Corporation | Spray angle measurement apparatus and method |
| WO2010107895A3 (en) * | 2009-03-17 | 2011-01-13 | Proveris Scientific Corporation | Spray angle measurement apparatus and method |
| WO2012055078A1 (en) * | 2010-10-25 | 2012-05-03 | 大连德新机电技术工程有限公司 | Piston fuel-injector detection device |
| CN102454526A (en) * | 2010-10-25 | 2012-05-16 | 大连德新机电技术工程有限公司 | Detecting device for fuel injector with piston |
| JP2013545919A (en) * | 2010-10-25 | 2013-12-26 | 大連徳新机電技術工程有限公司 | Piston oil injector inspection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3666561B2 (en) | 2005-06-29 |
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