GB2024939A - Intake system for an internal combustion engine - Google Patents

Intake system for an internal combustion engine Download PDF

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Publication number
GB2024939A
GB2024939A GB7923038A GB7923038A GB2024939A GB 2024939 A GB2024939 A GB 2024939A GB 7923038 A GB7923038 A GB 7923038A GB 7923038 A GB7923038 A GB 7923038A GB 2024939 A GB2024939 A GB 2024939A
Authority
GB
United Kingdom
Prior art keywords
intake passage
air
intake
passage
enlarged chamber
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Withdrawn
Application number
GB7923038A
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Publication of GB2024939A publication Critical patent/GB2024939A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10019—Means upstream of the fuel injection system, carburettor or plenum chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10262—Flow guides, obstructions, deflectors or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/047—Injectors peculiar thereto injectors with air chambers, e.g. communicating with atmosphere for aerating the nozzles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

An intake passage 3 is bent at a portion thereof between an air cleaner (not shown) and an intake manifold 2, a mounting 11 for a fuel injector 10 projecting into a section of the intake passage downstream of the bent portion and defining an annular passage 12 at said bent portion, and an annular enlarged chamber 13 formed around said annular passage. The chamber 13 and baffle plate 15, perforated plates 17, 18 and honeycomb passages 20, 19 are adapted to make the flow of air from the air cleaner less directional, uniform the air flow and relieve pulsation thereof, thereby improving mixing of fuel and air and atomization of fuel to improve uniformity of distribution of a fuel and air mixture. <IMAGE>

Description

SPECIFICATION Intake passage system for internal combustion engine BACKGROUND OF THE INVENTION This invention relates to an intake passage system for a spark-ignition internal combustion engine for supplying fuel through a fuel injector into a concentrated portion of an intake manifold.
An internal combustion engine of a concentrated fuel injection type in which fuel is injected into a concentrated portion of an intake manifold by a fuel injector is advantageous in making a fuel system simple and manufacturing the engine far less costly, comparing with an engine of a conventional fuel injection type in which a fuel injector is provided for each cylinder of the engine to supply fuel thereinto. The concentrated fuel injection type engine has also good productivity and reliability. However, in this type of engine, uniformity of distribution of a fuel and air mixture to the respective cylinders is inferior to the conventional type of engine. This is resulted from insufficiency of mixing of fuel and air and of atomization of fuel, deflected flow and turbulence of intake air, and adhesion of fuel onto an inner wall of the intake passage.
SUMMARY OF THE INVENTION An object of this invention is to provide an intake passage system for an internal combustion engine of a concentrated fuel injection type, in which uniformity of distribution of a fuel and air mixture to the respective cylinders of the engine is improved.
According to this invention, there is provided an intake passage system for an internal combustion engine comprising an intake passage bent at a portion thereof between an air cleaner and a concentrated portion of an intake manifold, an attaching portion for a fuel injector extending from a wall of the passage facing a section of the intake passage downstream of the bent portion and projecting into the downstream passage section, said attaching portion defining an annular passage at said bent portion, and an annular enlarged chamber formed around said annular passage and having an axis substantially in alignment with a center axis of said downstream passage section.
BRIEF DESCRIPTION OF THE DRAWINGS This invention will now be explained by way of example with reference to the accompanying drawings in which: Figure 1 is a cross-sectional view of an intake passage system for an internal combustion engine according to this invention, taken along the line I--I in Figure 2, and Figure 2 is a cross-sectional view taken along the line Il-Il in Figure 1.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Figures 1 and 2, an internal combustion engine of a concentrated fuel injection type has an engine 1 itself having a plurality of cylinders, and intake manifold 2 connected to the engine 1, an air horn 4 connected to a concentrated portion of the intake manifold 2 and defining in its inside an intake passage 3 bent substantially at a right angle, and an intake pipe 6 providing a throttle valve 5 therein. An open end Qf the intake pipe 6 is connected to an air cleaner (not shown) through an appropriate flow sensor for measuring a flow of intake air.
The intake manifold 2 is provided with a heat riser 7 which is supplied with engine cooling water or exhaust gas to heat a fuel and air mixture supplied to the cylinders of the engine through the intake manifold 2, thereby promoting atomization of fuel.
The air horn 4 has an enlarged section 8 and a downwardly extending section 9 extending substantially at a right angle relative to the enlarged section. The enlarged section 8 is provided on its wall facing the downwardly extending section 9 with a cylindrical attaching portion 11 for attaching a fuel injector 10. An axis of the attaching portion 11 is substantially in alignment with a center axis of the intake passage 3 in the downwardly extending section 9. The fuel injector 10 may be of any types, but in this embodiment it is a cosnventional fuel injector in which a valve member is displaced touts open and closed positions in response to energization and deenergization of an electromagnetic coil of the injector.The attaching portion 11 a extends from said wall and projects into the intake passage-3 in the downwardly extending section 9 to define an annular passage 12 at the perpendicularly bent portion of the intake passage 3 at an upper end of the downwardly extending portion 9. The portion 11 also defines within theonlarged section 8 an annular enlarged chamber 13 having an axis substantiaily in alignment with said center axis of the intake passage 3. This enlarged chamber 13 is adapted to attenuate directivity of the intake air flowing from the air cleaner through the throttle valve 5 and to uniform the flow of intake air. The chamber 13 also relieves pulsation of the air flow in the intake passage 3.An annular protrusion 1 4 is formed on a lower inner wall of the enlarged chamber 13, at a connection between the annular passage 12 and the enlarged chamber 113 to promote uniforming of the air flow and attenuation of directivity of the intake air.
An arcuate baffle plate 1 5 is provided at an air intake side of said enlarged chamber 13 to distribute substantially uniformly the intake air from the air cleaner in the entirety of the enlarged chamber 13. Also, a partition plate 1 6 is provided on the inner wall of the enlarged chamber 13 diametrically opposite to an air intake end of the enlarged section 8. Consequently, the intake air is distributed substantially uniformly in the entirety of the enlarged chamber 13 by said baffle plate 1 5 and prevented from turning in the enlarged chamber 13 by the partition plate 16. Thus, the directivity of the intake air is attenuated to permit the air to flow substantially uniformly into the annular passage 12 from the periphery thereof.The baffle plate 15 may be formed by a sheet metal having no hole or a porous plate having a large number of small apertures or slits and is disposed substantially concentrically with the center axis of the intake passage 3 in the downwardly extending section 9. A shape of the baffle plate 1 5 is not limited to an arc as shown, but may be of any shape such as a triangle.
In practical use, the above described construction of the intake passage system is sufficient to distribute the intake air substantially uniformly in the enlarged chamber 13 and to flow the air uniformly into the annular passage 1 2 from the periphery thereof, but in this embodiment the following other components are added in order to improve the above effects: Two annular flow uniforming plates 1 7 and 18 having different diameters are disposed concentrically with respect to the portion 11 in said enlarged chamber 13.
The flow uniforming plates 17 and 18 are formed by porous plates having a large number of apertures and adapted to attenuate the directivity of the intake air and permit the air to flow substantially uniformly into the annular passage from the periphery thereof, as similarly to the L: Fle plate 15. Instead of two flow uniforming plates 1 7 and 18, a single annular flow uniforming plate may be provided. A flow uniforming grating 19 of a honeycomb core shape is located in the annular passage 12.The flow uniforming grating 1 9 is adapted to uniform or straighten the flow of air flowing through the flow uniforming plates 17 and 18 into the intake passage 3 in the downwardly extending section 9, thereby preventing the fuel injected into the intake passage 3 by the fuel injector 10 from partially adhering onto the wall of the intake passage if the fuel is deflectedly injected, and improving uniformity of mixing of fuel and air and atomization of fuel to improve distribution of the fuel and air mixture into the plurality of cylinders of the engine. Also, the similar flow uniforming grating 20 of a honeycomb core shape is located in the air intake end of the enlarged section 8 between the throttle valve 5 and the enlarged chamber 13.This flow uniforming grating 20 uniforms or straightens a turbulence or ununiform flow of the intake air caused by passing through the throttle valve 5, thereby preventing deflected flow of air into the enlarged chamber 13.
Further, an air passage 21 provided in the attaching portion 11 opens to a periphery of a nozzle of the fuel injector 10 and communicates with the intake passage 3 in the intake pipe 6 upstream of the throttle valve 5. This air passage 21 permits air in the intake passage upstream of the throttle valve 5 to be supplied into the intake passage 3 in the downwardly extending section 9 from the periphery of the nozzle of the fuel injector 10, thereby preventing the deflected flow and adhesion of the injected fuel from the injector onto the wall of the intake passage 3, which is caused, since particularly at idling and a slow-speed and low-loaded driving of the engine a velocity of flow of the intake air flowing in the intake passage 3 is small, and thereby improving uniformity of mixing of air and fuel and atomization of fuel to improve the distribution of the fuel and air mixture, Air flowing through the flow sensor (not shown) from the air cleaner creates a turbulence in the air flow when it passes through the throttle valve 5 and an opening degree of the valve is small. This turbulence in the air flow is straightened or uniformed by the flow uniforming grating 20, and the uniformed airflow enters into the enlarged chamber 13. By the baffle plate 1 5 and the partition plate 1 6 in the enlarged chamber 13, the intake air is distributed uniformly around the annular flow uniforming plate 17 and prevented from turning.Then, the air flows uniformly into the annular passage 12 through a large number of apertures in the flow uniforming plates 17 and 18 and enters into the intake passage 3 in the downwardly extending section 9 after the flow of air is straightened and uniformed by passing through the flow uniforming grating 19. The fuel injected from the fuel injector 10 is dispersed in and mixed with this straightened and uniform flow of the intake air, thereby atomizeing the fuel sufficiently.Also, at a driving range of the engine in which the velocity of flow of the air is relatively high, the air flow prevents the adhesion of the fuel onto the wall surface of the intake passage 3, so that ununfformity of distribution of the fuel resulted from the adhesion of fuel is relieved.
Consequently, a uniform fuel and air mixture is supplied to each cylinder of the engine 1 through the intake manifold 2.Also, at idling and a slowspeed and low-loaded driving of the engine, air is inducted through the air passage 21 into the intake passage 3 from the periphery of the nozzle of the fuel injector 10 due to a high vacuum produced in the intake passage 3, whereby the deflected flow and adhesion of fuel onto the inner wall of the intake passage are prevented and the distribution of the fuel and air mixture is improved due to improvements of mixing and atomization.
Thus, by the intake passage system according to the invention, it becomes possible to always distribute the uniform fuel and air mixture into each cylinder at any driving range of the engine.
Therefore, ununiformity of distribution of the fuel and air mixture in the engine of the concentrated fuel injection type is eliminated.
In order to obtain an optimum result of the invention, dimensions of the intake passage system are determined as follows: Assuming that a total displacement of the engine is Ve, a volume Vs of the enlarged chamber 13 of the air horn 4 necessary for attenuating the directivity of the intake air, uniforming of the air flow and relieving pulsation of the air flow in the intake passage is adequately determined by the following equation: Vs=(2~1 2)Ve.
A distance L between a lowest inner wall of the enlarged chamber 13 and center of the concentrated portion of the intake manifold 2 determines a length effective for mixing fuel and air, atomization of fuel and uniforming the fuel and air mixture prior to distribution to each cylinder.
Assuming that a diameter of the intake passage 3 in the downwardly extending section 9 is a, the distance L is adequately determined as follows: L=(1.5N3)a or L > 1 .5a.
Assuming that a main passage area A of the intake passage 3 is 7d A=-a2, 4 a minimum annular area A' in the enlarged chamber 13 limited by the annular protrusion 14 is adequately determined by the following equation: A'=(1 .2N2.0)A.
The annular area is an area of a cylindrical surface of a cylindrical portion centered about the injector 10 in the enlarged chamber 13. The minimum annular area A' in this embodiment is an area of a cylindrical portion having its diameter corresponding to the diameter of the annular protrusion 14. Also, the main passage area is generally an area of a circle having a diameter of a throttle bore (an inner diameter of the intake passage at a location of the throttle valve), that is an area of the intake passage. in this embodiment, the main passage area is an area of the intake passage 3 in the downwardly extending section 9 having a diameter substantially the same as said throttle bore. This main passage area is determined in accordance with a maximum output of an individual engine.
Assuming that a maximum depth m of the enlarged chamber 1 3 is m=about a, a distance n between the annular protrusion 14 and an upper wall surface of the enlarged chamber 13 is preferably determined as follows: n= about 0.7m.
Area of the apertures of each of the flow uniforming plates 17 and 18 is 60 - 70 percents of the total area of the corresponding plate.
Diameters Dpt and Dp2 of the flow uniforming plates 1 7 and 18 are preferably selected respectively as follows: Dp,= about 2.5a Dp2= about 1 .5a.
In the case of a single flow uniforming plate instead of two flow uniforming plates 17 and 18, a diameter Dp of said plate is effectively determined as Dp= about 2a.
A distance i between the center axis of the intake passage 3 in the downwardly extending section 9 and a center of the throttle valve 5 is determined as i > 2a.

Claims (9)

1. An intake passage system for an internal combustion engine comprising an intake passage bent at a portion thereof between an air cleaner and a concentrated portion of an intake manifold, an attaching portion for a fuel injector extending from a wall of the passage facing a section of the intake passage downstream of the bent portion and projecting into the downstream passage section, said attaching portion defining an annular passage at said bent portion, and an annular enlarged chamber formed around said annular passage and having an axis substantially in alignment with a center axis of said downstream passage section.
2. An intake passage system as claimed in claim 1, wherein an annular protrusion ss tormed on a lower side of a connection between said enlarged chamber and said annular passage.
3. An intake passage system as claimed in claim 1 or 2, wherein a baffle plate is provided at an air intake side of said enlarged chamber to distribute substantially uniformly intake air from said air cleaner in the entirety of said enlarged chamber.
4. An intake passage system as claimed in claim 1, 2 or 3 wherein a partition plate for preventing turning of air is provided in said enlarged chamber at a side opposite to the air intake side.
5. An intake passage system as claimed in any preceding claim, wherein a throttle valve is disposed in the intake passage upstream of said enlarged chamber, air in the intake passage upstream of the throttle valve being injected from a periphery of a nozzle of said fuel injector into the intake passage.
6. An intake passage system as claimed in any preceding claim, wherein at least one annular flow uniforming plate having a large number of apertures is provided in said enlarged chamber.
7. An intake passage system as claimed in any preceding claim, wherein a flow uniforming member is located in said annular passage.
8. An intake passage system as claimed in any preceding claim, wherein a throttle valve is disposed in the intake passage upstream of said enlarged chamber, a flow uniforming member being located in the intake passage between said throttle valve and the enlarged chamber.
9. An intake passage system, for internal combustion engine, substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
GB7923038A 1978-07-07 1979-07-03 Intake system for an internal combustion engine Withdrawn GB2024939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53082071A JPS602513B2 (en) 1978-07-07 1978-07-07 Internal combustion engine intake passage structure

Publications (1)

Publication Number Publication Date
GB2024939A true GB2024939A (en) 1980-01-16

Family

ID=13764244

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7923038A Withdrawn GB2024939A (en) 1978-07-07 1979-07-03 Intake system for an internal combustion engine

Country Status (4)

Country Link
JP (1) JPS602513B2 (en)
DE (1) DE2927218A1 (en)
FR (1) FR2430519A1 (en)
GB (1) GB2024939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214522A1 (en) * 1985-08-28 1987-03-18 Hitachi, Ltd. Single or twin valve type fuel injection system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227181A1 (en) * 1982-07-21 1984-01-26 Audi Nsu Auto Union Ag, 7107 Neckarsulm Fuel injection device for a mixture-compressing, spark-ignition internal combustion engine
JPS6026269U (en) * 1983-07-29 1985-02-22 トヨタ自動車株式会社 air cleaner
IT1208422B (en) * 1987-04-30 1989-06-12 Weber Srl AIR AND FUEL MIXER AND DOSER DEVICE FOR AN INTERNAL COMBUSTION ENGINE
DE59301070D1 (en) * 1992-04-03 1996-01-18 Heberlein & Co Ag Device for interlacing multifilament yarns.
DE102010042426A1 (en) * 2010-10-13 2012-04-19 Mahle International Gmbh Filter element and air filter
CN104295384B (en) * 2014-09-29 2017-02-01 日立汽车系统(苏州）有限公司 Self-cleaning air inlet system and control method thereof as well as engine including system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR944364A (en) * 1940-08-03 1949-04-04 Bendix Aviat Corp Power supply device for internal combustion engines
FR938758A (en) * 1942-07-22 1948-10-25 Bendix Aviat Corp Improvements to fuel supply systems
DE1230611B (en) * 1960-11-22 1966-12-15 Sibe Intake manifold for multi-cylinder internal combustion engines
US3336017A (en) * 1965-01-12 1967-08-15 Univ California Compound cyclonic flow inductor and improved carburetor embodying same
DE1933601A1 (en) * 1969-07-02 1971-01-14 Henri Morgenroth Carburettors for internal combustion engines
DE2542718A1 (en) * 1975-09-25 1977-04-07 Daimler Benz Ag Fuel vaporising air vibrator - has electrical charge applied across capillary tubes with sharp edges to atomise fuel particles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214522A1 (en) * 1985-08-28 1987-03-18 Hitachi, Ltd. Single or twin valve type fuel injection system

Also Published As

Publication number Publication date
FR2430519A1 (en) 1980-02-01
DE2927218A1 (en) 1980-01-17
JPS5510038A (en) 1980-01-24
JPS602513B2 (en) 1985-01-22

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