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KR20010039354A - Fuel Injection Device for Internal Combustion Engine - Google Patents

Fuel Injection Device for Internal Combustion Engine Download PDF

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Publication number
KR20010039354A
KR20010039354A KR1019990047716A KR19990047716A KR20010039354A KR 20010039354 A KR20010039354 A KR 20010039354A KR 1019990047716 A KR1019990047716 A KR 1019990047716A KR 19990047716 A KR19990047716 A KR 19990047716A KR 20010039354 A KR20010039354 A KR 20010039354A
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KR
South Korea
Prior art keywords
roller
pin
fuel injection
injection device
lubricating oil
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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.)
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KR1019990047716A
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Korean (ko)
Inventor
권영만
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박상록
주식회사 두원정공
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Priority to KR1019990047716A priority Critical patent/KR20010039354A/en
Publication of KR20010039354A publication Critical patent/KR20010039354A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston

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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

PURPOSE: A fuel injecting device for an internal combustion engine is provided to improve reliability even in a high pressure state of the fuel injecting device by preventing an adherence due to a thermal expansion occurred between a tapetal pin and a roller. CONSTITUTION: A fuel injecting device for the internal combustion engine includes a roller(6), a tapetal pin(5) inserted in the inside of the roller, a plunger(8) reciprocating vertically, and a lubricating oil hole(5a) spirally formed in an outer surface of the tapetal pin for lubricating between the tapetal pin and the roller with lubricating oil. Another spiral lubricating hole is formed in the inner surface of the roller for lubricating between the tapetal pin and the roller with lubricating oil.

Description

내연기관용 연료분사장치{Fuel Injection Device for Internal Combustion Engine}Fuel Injection Device for Internal Combustion Engine

본 발명은 캠축의 회전에 따라 상하로 왕복운동하는 플런저에 의해 연료를 펌핑하는 내연기관용 연료분사장치에 관한 것으로, 특히 롤라와 롤라의 내측에 삽입되는 타페트핀에 윤활유홈을 형성하여 롤라와 타페트핀이 접촉하고 있는 표면으로 윤활유가 원활하게 공급되도록 하므로서 타페트핀과 롤라의 박리나 마모를 방지하여 그 효율을 극대화 할 수 있는 내연기관용 연료분사장치에 관한 것이다.The present invention relates to a fuel injection device for an internal combustion engine that pumps fuel by a plunger that reciprocates up and down as the camshaft rotates. In particular, a lubricating oil groove is formed in the roller and a tappet pin inserted into the roller. The present invention relates to a fuel injection device for an internal combustion engine capable of maximizing the efficiency by preventing delamination or abrasion of the tappet pin and the roller while allowing lubricating oil to be smoothly supplied to the surface where the pet pin is in contact.

근래에 들어 디젤기관의 배기가스규제가 강화되면서 연료분사장치에서는 고압화로의 대응이 필수적으로 되고 있다.In recent years, as the exhaust gas regulation of diesel engines is tightened, it is essential to cope with a high pressure in a fuel injection device.

그러나 종래의 연료분사장치에서는 고압화에 따라 플런저를 상하로 왕복운동시키는 캠과 타페트 조합에 부하가 증대하여, 타페트 조합을 구성하는 타페트핀과 롤라에 박리나 마모가 발생하기 때문에 연료분사장치의 효율이 저하되는 문제점이 있었다.However, in the conventional fuel injection device, since the load increases on the cam and tappet combination that reciprocates the plunger up and down as the pressure increases, the fuel injection is caused by peeling and wear on the tappet pin and the roller forming the tappet combination. There was a problem that the efficiency of the device is lowered.

이를 해결하기 위하여 도 4의 도시와 같이 윤활유를 원활하게 공급하기 위해서 연료분사장치내에 설치된 캠실에 고여 있는 윤활유를 회전하는 캠(3)으로 쳐올려 윤활하도록 하는 것만으로는 타페트핀(5)과 롤라(6) 사이의 접촉부에 충분한 윤활을 할 수 없는 문제점이 있었다.In order to solve this problem, in order to smoothly supply the lubricating oil as shown in FIG. 4, the tappet pin 5 and the lubricating oil accumulated in the cam chamber installed in the fuel injection device are lifted and lubricated by the rotating cam 3. There was a problem that sufficient lubrication was not possible between the contacts between the rollers 6.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서,The present invention has been made to solve the above problems,

타페트핀의 외주면이나 롤라의 내주면에 윤활유홈을 형성하여 이를 통해 타페트핀과 롤라의 접촉면에 윤활유를 충분히 공급할 수 있도록 하여 원활한 윤활작용을 할 수 있도록 하므로서, 타페트핀과 롤라의 사이에 발생하기 쉬운 열팽창에 의한 고착(소착)을 방지하여 연료분사장치에서의 고압화시에도 신뢰성을 향상시킬 수 있는 내연기관용 연료분사장치를 제공함에 본 발명의 목적이 있다.Lubrication grooves are formed on the outer circumferential surface of the tappet pin or the inner circumferential surface of the roller so that the lubricant can be supplied sufficiently to the contact surface between the tappet pin and the roller so that smooth lubrication can occur. SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel injection device for an internal combustion engine, which can prevent sticking (sintering) due to thermal expansion, which is easy to improve, and thus improve reliability even at high pressure in the fuel injection device.

도 1 는 본 발명에 의한 연료분사장치의 요부 확대 단면도.1 is an enlarged cross-sectional view of main parts of a fuel injection device according to the present invention;

도 2 는 본 발명의 타페트핀과 롤라를 분리한 상태의 분리도.2 is an exploded view of a state in which the tappet pin and the roll of the present invention are separated.

도 3 은 본 발명의 타실시예를 나타낸 분리도.Figure 3 is an exploded view showing another embodiment of the present invention.

도 4 는 종래 연료분사장치의 부분단면도.4 is a partial cross-sectional view of a conventional fuel injection device.

<도면의 주요 부분에 대한 부호의 설명><Description of the code | symbol about the principal part of drawing>

1 : 하우징 2 : 캠축1 housing 2 camshaft

3 : 캠 4 : 타페트조합3: cam 4: tappet combination

4a: 연장부 4b : 타페트본체4a: extension part 4b: tappet body

5 : 타페트핀 5a : 유활홈5: Tappetpin 5a: Recreational home

6 : 롤라 6a : 윤활유홈6: Lola 6a: lubricant groove

7 : 스프링시트 8 : 플런저7: spring seat 8: plunger

9 : 배럴 10 : 스프링9: barrel 10: spring

11 : 압축실 12 : 스프링시트11: compression chamber 12: spring seat

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1 는 본 발명에 의한 연료분사장치의 요부 확대 단면도이고, 도 2 는 본 발명의 타페트핀과 롤라를 분리한 상태의 분리도이다.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an enlarged cross sectional view of a main portion of a fuel injection device according to the present invention.

롤라(6)와 롤라(6)의 내측에 삽입되는 타페트핀(5)을 구비하고, 상하왕복운동하는 플런저(8)에 의해 연료를 송출하도록 구성한 내연기관용 연료분사장치에 있어서, 전기한 타페트핀(5)의 외주면에 나선형의 윤활유홈(5a)을 형성하여 타페트핀(5)과 롤러(6)의 사이에 윤활유가 윤활될 수 있게 한 것이다.A fuel injection device for an internal combustion engine, comprising a roller 6 and a tappet pin 5 inserted into the roller 6 and configured to deliver fuel by a plunger 8 which moves up and down in a row. The spiral lubricating oil groove 5a is formed on the outer circumferential surface of the pet pin 5 so that the lubricating oil can be lubricated between the tappet pin 5 and the roller 6.

도 3 은 본 발명의 타실시예를 나타낸 분리도이다.3 is an exploded view showing another embodiment of the present invention.

전기한 바와 같은 롤라(6)와 타페트핀(5)의 결합면의 롤라(6) 내주면에 나선형의 윤활유홈(6a)을 형성하여 타페트핀(5)과 롤러(6)의 사이에 윤활유가 윤활될 수 있게 구성한 것이다.A lubricating oil groove 6a is formed on the inner circumferential surface of the roller 6 of the coupling surface of the roller 6 and the tappet pin 5 as described above to form a lubricating oil between the tappet pin 5 and the roller 6. Is configured to be lubricated.

도면중 미설명부호 1은 하우징, 2는 캠축, 3은 캠, 4는 타페트조합, 4a는 연장부, 4b는 타페트본체, 7은 스프링시트, 9는 배럴, 10은 스프링, 11은 압축실, 12는 스프링시트이다.In the drawings, reference numeral 1 denotes a housing, 2 camshaft, 3 cam, 4 tappet combination, 4a extension, 4b tappet body, 7 spring seat, 9 barrel, 10 spring, 11 compression Thread 12 is a spring seat.

이하, 상기와 같이 구성된 본 발명의 작용을 설명한다.Hereinafter, the operation of the present invention configured as described above.

내연기관으로 부터 구동력을 전달 받은 캠축(2)의 회전에 의해, 캠축(2)에 형성된 캠(3)의 형상에 따라 플런저(8)가 상하로 왕복운동을 하게 되고, 플런저(8)의 상승 운동시에는 압축실(11)에 유입되어 있던 연료가 송출밸브(도면에는 표시되지 않음)로 압송된다.By rotation of the camshaft 2 which received the driving force from the internal combustion engine, the plunger 8 reciprocates up and down according to the shape of the cam 3 formed in the camshaft 2, and the plunger 8 raises. At the time of movement, the fuel flowing into the compression chamber 11 is pumped to a delivery valve (not shown).

타페트 조합(4)은 포크형상의 연장부(4a)가 형성되어 있는 타페트 본체(4b)와, 상기의 연장부(4a)에 삽입되는 타페트핀(5)과, 이 타페트핀(5)의 외측면에 끼워지는 롤라(6)로 구성되어 있다.The tappet combination 4 includes a tappet body 4b having a fork-shaped extension 4a formed therein, a tappet pin 5 inserted into the extension 4a, and a tappet pin ( The roller 6 is fitted to the outer surface of 5).

상기 타페트 본체(4b)는 연료분사장치의 하우징(1)에 형성된 수직구멍내에 상하로 슬라이딩되도록 삽입되어 있다.The tappet body 4b is inserted to slide up and down in a vertical hole formed in the housing 1 of the fuel injection device.

롤라(6)는 캠(3)의 외측면과 접촉하고 있으며, 캠(3)은 캠축(2)에 대해 편심되어 있기 때문에, 캠축(2)이 회전하면 상기의 플런저(8)가 타페트 조합(4)과 함께 하우징(1)의 수직구멍내에서 상하로 왕복운동을 하게 된다.The roller 6 is in contact with the outer surface of the cam 3, and the cam 3 is eccentric with respect to the camshaft 2. Therefore, when the camshaft 2 rotates, the said plunger 8 will combine a tappet. Together with (4), the reciprocating motion is performed up and down in the vertical hole of the housing (1).

상기의 플런저(8)는 그 하부가 스프링시트(7)에 삽입되고, 그 상부는 배럴(9)에 삽입되어 있고, 배럴(9)의 내측면과 플런저(8)의 상측 표면은 압축실(11)을 형성하며, 압축실(11)에 유입되어 있던 연료는 플런저(8)의 상승운동시에 압송된다.The lower part of the plunger 8 is inserted into the spring seat 7, the upper part of the plunger 8 is inserted into the barrel 9, and the inner surface of the barrel 9 and the upper surface of the plunger 8 are compressed chambers ( 11), and the fuel introduced into the compression chamber 11 is pumped during the upward movement of the plunger 8.

하부 스프링시트(7)와 상부 스프링 시트(12) 사이에 삽입된 플런저 스프링(10)은 연료의 압송이 끝난 후에 플런저(8)를 캠(3)축 방향으로 되돌아 가게 밀어 준다.The plunger spring 10 inserted between the lower spring seat 7 and the upper spring seat 12 pushes the plunger 8 back in the cam 3 axis direction after the fuel feeding is completed.

타페트 조합(4)에 있어서 롤라(6)의 중심에 삽입되어 있는 타페트핀(5)에는 도 2의 도시와 같이 타페트핀(5)의 외주면에 나선형의 윤활유홈(5a)을 형성하므로서, 타페트 조합(4)이 캠축(2)의 회전에 의해 상하로 왕복운동을 하게 될 때, 타페트핀(5)과 롤라(6) 사이의 접촉부는 윤활유홈(5a)를 통하여 원활하게 윤활유를 공급할 수 있어 접촉부에 발생하기 쉬운 열팽창에 의한 고착이나 박리의 발생을 방지한다.In the tappet combination 4, the tappet pin 5 inserted in the center of the roll 6 is formed with a spiral lubricant groove 5a on the outer circumferential surface of the tappet pin 5 as shown in FIG. , When the tappet combination 4 reciprocates up and down by the rotation of the camshaft 2, the contact portion between the tappet pin 5 and the roller 6 is smoothly lubricated through the lubricating oil groove 5a. Can be supplied to prevent adhesion or peeling due to thermal expansion, which is likely to occur at the contact portion.

또한, 도 3의 도시와 같이 롤라(6)의 내주면에 윤활유홈(6a)를 형성하는 경우에도 타페트핀(5)과 롤라(6) 사이의 접촉부는 이 윤활유홈(6a)을 통하여 원활하게 윤활유가 공급되므로, 역시 접촉부에서의 고착을 방지하므로 연료분사장치의 고압화시에도 신뢰성이 향상되는 것이다.In addition, even when the lubricating oil groove 6a is formed on the inner circumferential surface of the roller 6 as shown in FIG. 3, the contact portion between the tappet pin 5 and the roller 6 is smoothly passed through the lubricating oil groove 6a. Since the lubricating oil is supplied, it also prevents sticking at the contact portion, so that the reliability is improved even when the fuel injection device is increased in pressure.

이와 같이 본 발명은 연료분사장치의 타페트핀(5) 또는 롤러(6)에 윤활유홈(5a)(6a)를 형성하여 마찰시 발생하는 마모를 최소화하므로서 연료분사장치의 성능을 향상시킬 수 있는 것이다.As described above, the present invention can improve the performance of the fuel injection device while minimizing wear caused by friction by forming the lubricating oil grooves 5a and 6a in the tappet pin 5 or the roller 6 of the fuel injection device. will be.

상기와 같이 본 발명은 타페트핀의 외주면이나 롤라의 내주면에 윤활유홈을 형성하여 이를 통해 타페트핀과 롤라의 접촉면에 윤활유를 충분히 공급할 수 있도록 하여 원활한 윤활작용을 할 수 있도록 하므로서, 타페트핀과 롤라의 사이에 발생하기 쉬운 열팽창에 의한 고착(소착)을 방지하여 연료분사장치에서의 고압화시에도 신뢰성을 향상시킬 수 있는 효과가 있다.As described above, the present invention forms a lubricating oil groove on the outer circumferential surface of the tappet pin or the inner circumferential surface of the roller so that the lubricating oil can be sufficiently supplied to the contact surface of the tappet pin and the roller, thereby enabling smooth lubrication. It is effective in improving reliability even at high pressure in the fuel injection device by preventing sticking (sintering) due to thermal expansion that is likely to occur between the roller and the roller.

Claims (2)

롤라(6)와, 롤라(6)의 내측에 삽입되는 타페트핀(5)을 구비하고, 상하왕복운동하는 플런저(8)에 의해 연료를 송출하도록 구성한 내연기관용 연료분사장치에 있어서, 전기한 타페트핀(5)의 외주면에 나선형의 윤활유홈(5a)을 형성하여 타페트핀(5)과 롤러(6)의 사이에 윤활유가 윤활될 수 있게 함을 특징으로 하는 내연기관용 연료분사장치.A fuel injection device for an internal combustion engine comprising a roller 6 and a tappet pin 5 inserted into the roller 6 and configured to discharge fuel by a plunger 8 that moves up and down. And a spiral lubricant groove (5a) formed on the outer circumferential surface of the tappet pin (5) so that the lubricant can be lubricated between the tappet pin (5) and the roller (6). 제 1 항에 있어서, 전기한 롤라(6)와 타페트핀(5)가 결합된 롤라(6) 내주면에 나선형의 윤활유홈(6a)을 형성하여 타페트핀(5)과 롤러(6)의 사이에 윤활유가 윤활될 수 있게 구성함을 특징으로 하는 내연기관용 연료분사장치.The spiral lubricating oil groove 6a is formed on the inner circumferential surface of the roller 6 to which the rolled roller 6 and the tappet pin 5 are coupled to each other. A fuel injection device for an internal combustion engine, characterized in that configured to be lubricating oil between.
KR1019990047716A 1999-10-30 1999-10-30 Fuel Injection Device for Internal Combustion Engine Withdrawn KR20010039354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019990047716A KR20010039354A (en) 1999-10-30 1999-10-30 Fuel Injection Device for Internal Combustion Engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990047716A KR20010039354A (en) 1999-10-30 1999-10-30 Fuel Injection Device for Internal Combustion Engine

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KR20010039354A true KR20010039354A (en) 2001-05-15

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KR1019990047716A Withdrawn KR20010039354A (en) 1999-10-30 1999-10-30 Fuel Injection Device for Internal Combustion Engine

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Patent event date: 19991030

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