KR20010048427A - Intake valve and manufacturing method of which for vehicle - Google Patents

Intake valve and manufacturing method of which for vehicle Download PDF

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Publication number
KR20010048427A
KR20010048427A KR1019990053109A KR19990053109A KR20010048427A KR 20010048427 A KR20010048427 A KR 20010048427A KR 1019990053109 A KR1019990053109 A KR 1019990053109A KR 19990053109 A KR19990053109 A KR 19990053109A KR 20010048427 A KR20010048427 A KR 20010048427A
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South Korea
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valve
intake valve
steel
intake
valve stem
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KR1019990053109A
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Korean (ko)
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KR100559623B1 (en
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박용선
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이계안
현대자동차 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE: A vehicle intake valve and a manufacturing method thereof are provided to reduce the weight of an intake valve by forming a valve head and a valve stem with aluminum alloy and forcibly fitting a steel tip to a valve stem end part which contacts a tappet or a locker arm, thereby preventing the jumping or bouncing. CONSTITUTION: A vehicle intake valve includes a valve head(12) for opening and closing an intake tube and formed with a concave part at a bottom part, a valve stem(14) corresponding to a valve body, and a valve stem end(17) contacting a locker arm or a tappet, wherein a lower part of the valve head is formed flat for improving the strength and abrasion-resistance, and an end part of the valve stem end is forcibly fitted with a tip(16) formed of steel for improving the strength and abrasion-resistance in case of the contact with the locker arm or the tappet.

Description

자동차용 흡기밸브 및 그 제조방법{Intake valve and manufacturing method of which for vehicle}Intake valve and manufacturing method of which for vehicle

본 발명은 자동차용 흡기밸브 및 그 제조방법에 관한 것으로, 좀 더 상세하게는 자동차용 흡기밸브의 밸브 헤드와 밸브 스템을 알루미늄 합금을 이용하여 제조하고 태핏이나 로커 암에 접촉하는 밸브 스템 엔드 부위에는 스틸강 재질의 팁을 강제로 끼워 맞추어 흡기밸브의 중량을 경량화 할 수 있고, 밸브 헤드의 끝단을 평평하게 형성하여 밸브 헤드의 강성을 보완할 수 있는 자동차용 흡기밸브 및 그 제조방법에 관한 것이다.The present invention relates to an intake valve for a vehicle and a method of manufacturing the same. More particularly, the valve head and the valve stem of the intake valve for a vehicle are manufactured by using an aluminum alloy, and the valve stem end portion that contacts the tappet or rocker arm is provided. The present invention relates to an intake valve for automobiles and a method of manufacturing the same, which can reduce the weight of the intake valve by forcibly fitting a steel steel tip and form a flat end of the valve head to compensate for the rigidity of the valve head.

일반적으로 밸브기구는 각 실린더의 흡기밸브, 배기밸브를 점화 순서대로 설계된 시기에 개폐작용을 하는 기구로써 밸브 배치와 연소실 형상에 의해 사이드 밸브식, 오버헤드 밸브식(OHV식), 오버헤드 캠축식(OHC) 등이 사용되며, 그 재질은 스틸강이 사용된다.In general, the valve mechanism is a mechanism that opens and closes the intake valves and exhaust valves of each cylinder in the order of ignition order, and the side valve type, the overhead valve type (OHV type), and the overhead camshaft type according to the valve arrangement and the shape of the combustion chamber. (OHC) etc. are used, The material is steel steel.

첨부한 도 2는 종래의 자동차용 흡기밸브를 나타내는 단면도이고, 도 3a 및 3b는 일반적인 흡기밸브의 개폐상태를 나타내는 단면도로써, 흡기밸브(10)는 점화 순서에 따라 흡입행정시에 밸브를 열게된다.2 is a cross-sectional view illustrating a conventional intake valve for a vehicle, and FIGS. 3A and 3B are cross-sectional views illustrating an open / close state of a general intake valve, and the intake valve 10 opens the valve at the suction stroke in the ignition order. .

즉, 캠(24)이 회전하면서 로커 암(22)을 밀게되고, 상기 로커 암(22)은 밸브 스프링(26)의 탄력을 억제하면서 흡기밸브(10)를 개방시켜서 흡기관(28)을 통하여 공기와 연료가 실린더로 유입된다That is, as the cam 24 rotates, the rocker arm 22 is pushed, and the rocker arm 22 opens the intake valve 10 while suppressing the elasticity of the valve spring 26 and through the intake pipe 28. Air and fuel enter the cylinder

또한, 압축행정시에는 흡기밸브(10)는 닫히게 되는데, 캠(24)이 회전하면서 로커 암(22)이 상승하고, 이에 따라 밸브 스프링(26)의 장력에 의해 밸브는 닫히게 된다.In addition, in the compression stroke, the intake valve 10 is closed. As the cam 24 rotates, the rocker arm 22 is raised, and the valve is closed by the tension of the valve spring 26.

이러한 흡기밸브(10)는 흡기관(28)의 개폐역할을 하는 밸브 헤드(12)와 밸브 몸체에 해당하는 밸브 스템(14) 및 로커 암(22) 또는 태핏(미도시됨)과 접촉하는 밸브 스템 엔드(17)로 이루어져 있으며, 상기 밸브 헤드(12)의 하단에는 보울(bowl) 형상의 오목부(18)가 형성되어 있다.The intake valve 10 is a valve head 12 which serves to open and close the intake pipe 28, a valve stem 14 corresponding to the valve body, and a valve contacting the rocker arm 22 or a tappet (not shown). It consists of a stem end 17, the bottom of the valve head 12 is formed with a bowl-shaped recess (18).

또한, 상기 흡기밸브(10)는 통상적으로 스틸강 재질로써 제조되며, 용탕을 위에서 주형에 부어서 주형에서 급속 냉각시켜 응고된 부분을 주형으로부터 연속적으로 뽑아내어 균질한 인고트(ingot)를 연속적으로 제작하는 연속주조공정과, 성형과 결정을 미립화하기 위한 단조공정과, 재료의 기계적 물리적 성질을 향상시키기 위한 열처리공정과, 표면을 경화시키기 위한 고주파 경화공정을 거쳐서 제조된다.In addition, the intake valve 10 is usually made of a steel steel material, by pouring the molten metal from the mold from above to rapidly cool the mold to continuously extract the solidified portion from the mold to produce a homogeneous ingot (ingot) continuously It is manufactured through a continuous casting process, a forging process for atomizing molding and crystals, a heat treatment process for improving the mechanical and physical properties of the material, and a high frequency curing process for hardening the surface.

그러나 상기와 같은 흡기밸브 및 그 제조방법은 스틸강을 사용하여 흡기밸브(10)를 제조함으로써 밸브의 중량이 많이 나가고, 이에 따라 엔진의 회전수가 높아질수록 흡기밸브(10)의 연속적인 상하 왕복운동에 의해 그 중량에 비례하여 관성이 작용하므로 흡기밸브(10)의 개방시 밸브헤드(12)가 지정된 변위보다 더 아래로 내려가는 점프(jump) 현상과, 흡기밸브(10)가 닫혀지는 경우에 밸브 헤드(12)가 흡기관(28)과 부딪혀서 되튀는 바운싱(bouncing) 현상이 발생하는 문제점이 있었다.However, the intake valve as described above and the manufacturing method of the intake valve 10 by using a steel steel, the weight of the valve is a lot of weight, according to the higher the number of rotation of the engine, the continuous vertical reciprocating motion of the intake valve 10 The inertia acts in proportion to the weight thereof, so that a jump phenomenon in which the valve head 12 is lowered more than a specified displacement when the intake valve 10 is opened, and the valve when the intake valve 10 is closed There was a problem in that a bouncing phenomenon occurs in which the head 12 hits the intake pipe 28 and bounces back.

한편, 배기밸브는 고온의 배기가스가 배출되는 곳이므로 고온의 환경에서도 강도가 요구되나, 흡기밸브는 상온의 공기와 연료가 흡입되는 곳이므로 고온에 대한 강도가 요구되지 않으므로 흡기밸브의 재료를 변경함으로써 경량화가 가능하다.On the other hand, the exhaust valve is a place where high-temperature exhaust gas is discharged, so strength is required even in a high temperature environment, but since the intake valve is a place where air and fuel are sucked at room temperature, the strength of the high temperature is not required, so the material of the intake valve is changed. This makes it possible to reduce the weight.

본 발명은 상기와 같은 문제점을 감안하여 안출한 것으로, 자동차용 흡기밸브의 밸브 헤드와 밸브 스템을 알루미늄 합금을 이용하여 제조하고 태핏이나 로커 암에 접촉하는 밸브 스템 엔드 부위에는 스틸강 재질의 팁을 강제로 끼워 맞추어 흡기밸브의 중량을 경량화 할 수 있고, 밸브 헤드의 끝단을 평평하게 형성하여 밸브 헤드의 강성을 보완할 수 있는 자동차용 흡기밸브 및 그 제조방법을 제공하는데 그 목적이 있다.The present invention has been made in view of the above problems, and the valve head and valve stem of the intake valve for automobiles are manufactured using aluminum alloy, and a steel steel tip is attached to the valve stem end portion in contact with the tappet or rocker arm. It is an object of the present invention to provide an intake valve for automobiles and a method of manufacturing the same, which can reduce the weight of the intake valve by forcibly fitting it and form a flat end of the valve head to compensate for the rigidity of the valve head.

도 1는 본 발명에 따른 자동차용 흡기밸브를 나타내는 단면도1 is a cross-sectional view showing an intake valve for a vehicle according to the present invention

도 2는 종래의 자동차용 흡기밸브를 나타내는 단면도Figure 2 is a cross-sectional view showing a conventional intake valve for automobiles

도 3a, 3b는 일반적인 흡기밸브의 개폐상태를 나타내는 단면도Figure 3a, 3b is a cross-sectional view showing the opening and closing state of the general intake valve

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 흡기밸브 12 : 밸브 헤드10: intake valve 12: valve head

14 : 밸브 스템(vlve stem) 16 : 팁(tip)14 valve stem 16 tip

17 : 밸브 스템 엔드(valve stem end)18 : 오목부17 valve stem end 18 recessed portion

22 : 로커 암(rocker arm) 24 : 캠22: rocker arm 24: cam

26 : 밸브 스프링 28 : 흡기관26: valve spring 28: intake pipe

이하, 첨부도면을 참조하여 본발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

본 발명에 따른 자동차용 흡기밸브는 흡기관(28)의 개폐역할을 하며 그 하단에는 오복부(18)가 형성된 밸브 헤드(12)와 밸브 몸체에 해당하는 밸브 스템(14)과 로커 암(22) 또는 태핏과 접촉하는 밸브 스템 엔드(17)로 이루어져 있는 자동차용 흡기밸브에 있어서, 상기 밸브 헤드(12)의 하단은 강도와 내마모성을 향상시키기 위하여 평평하게 형성되고, 상기 밸브 스템 엔드(17)의 끝단은 로커 암(22) 또는 태핏과의 접촉시 강도와 내마모성 향상을 위하여 스틸강 재질의 팁(16)이 강제로 끼워 맞추어진 것을 특징으로 한다.The intake valve for automobile according to the present invention serves to open and close the intake pipe 28 and the valve stem 12 and the rocker arm 22 corresponding to the valve body 12 and the valve body having a deformed portion 18 formed at the lower end thereof. Or an intake valve for an automobile consisting of a valve stem end 17 in contact with a tappet, the lower end of the valve head 12 is formed flat to improve strength and wear resistance, and the valve stem end 17 The end of is characterized in that the tip of the steel steel material 16 is forcibly fitted in order to improve the strength and wear resistance when in contact with the rocker arm 22 or tappet.

또한, 본 발명에 따른 자동차용 흡기밸브의 제조방법은 스틸강 재료로 연속주조공정과, 성형과 결정을 미립화하기 위한 단조공정과, 재료의 기계적 물리적 성질을 향상시키기 위한 열처리공정과, 표면을 경화시키기 위한 고주파 경화공정으로 제조되는 자동차용 흡기밸브의 제조방법에 있어서, 상기 흡기밸브(10)는 엔진의 고속 회전시 발생하는 점프 및 바운싱 현상을 방지하기 위하여 알루미늄 합금으로 제조되며, 밸브 스템 엔드(17)에 강제로 끼워져서 맞추어지는 팁(16)은 스틸강으로 제조되는 것을 특징으로 한다.In addition, the manufacturing method of the intake valve for automobiles according to the present invention is a continuous casting process of steel steel material, a forging process for atomizing forming and crystallization, a heat treatment process for improving the mechanical and physical properties of the material, and hardening the surface In the manufacturing method of an intake valve for a vehicle manufactured by a high-frequency hardening process to make, the intake valve 10 is made of an aluminum alloy in order to prevent jumps and bouncing phenomenon occurring during high-speed rotation of the engine, the valve stem end ( The tip 16, which is forcibly fitted in 17), is characterized in that it is made of steel steel.

특히, 상기 흡기밸브(10)의 재료인 알루미늄 합금은 2~3(wt%)의 규소와, 8~10(wt%)의 철과 1~2(wt%)의 바나듐과 85~89(wt%)의 알루미늄으로 이루어진 것을 특징으로 한다.In particular, the aluminum alloy, which is the material of the intake valve 10, includes 2 to 3 (wt%) of silicon, 8 to 10 (wt%) of iron, and 1 to 2 (wt%) of vanadium and 85 to 89 (wt). %) Of aluminum.

본 발명을 좀 더 상세히 설명하면 다음과 같다.The present invention is described in more detail as follows.

첨부한 도 1는 본 발명에 따른 자동차용 흡기밸브를 나타내는 단면도로써, 흡기밸브(10)는 2~3(wt%)의 규소와, 8~10(wt%)의 철과 1~2(wt%)의 바나듐과 85~89(wt%)의 알루미늄으로 이루어지는 알루미늄 합금으로 제조되며, 밸브 헤드(12)의 하단은 평탄하게 형성되어 종래의 스틸강 재질에 비하여 강도가 낮은 알루미늄 합금 재질의 밸브 헤드(12)에 대한 강성을 부여할 수 있는 적이다.1 is a cross-sectional view showing an intake valve for a vehicle according to the present invention, wherein the intake valve 10 includes 2 to 3 (wt%) of silicon, 8 to 10 (wt%) of iron, and 1 to 2 (wt). %) Of vanadium and 85 to 89 (wt%) aluminum alloy, the lower end of the valve head 12 is formed flat and has a lower strength than the conventional steel steel valve head It is an enemy that can impart stiffness to (12).

또한, 밸브 스템 엔드(17)의 끝단은 흡기밸브(10)의 개폐시 로커 암(22) 또는 태핏과 접촉되는 부위로 강성과 내마모성을 부여하기 위하여 종래와 같은 스틸강 재질의 팁(16)을 상기 밸브 스템 엔드(17) 끝단에 강제로 끼워서 맞춘다.In addition, the end of the valve stem end 17 is provided with a conventional steel steel tip 16 to provide rigidity and wear resistance to a portion contacting the rocker arm 22 or the tappet when the intake valve 10 is opened or closed. The valve stem end (17) is forced to fit the end.

따라서, 종래의 스틸강 재질의 흡기밸브 대신 알루미늄 합금 재질의 흡기밸브를 사용하여 흡기밸브의 무게를 약 60% 경량화 할 수 있는 것이다.Therefore, by using an intake valve made of aluminum alloy instead of the steel intake valve of the conventional steel it is possible to reduce the weight of the intake valve by about 60%.

또한, 흡기밸브(10)의 무게가 경량화 됨에 따라, 엔진의 회전수가 높아질수록 흡기밸브(10)의 연속적인 상하 왕복운동에 의해 그 중량에 비례하여 관성이 작용하므로 흡기밸브(10)의 개방시 밸브헤드(12)가 지정된 변위보다 더 아래로 내려가는 점프(jump) 현상과, 흡기밸브(10)가 닫혀지는 경우에 밸브 헤드(12)가 흡기관(28)과 부딪혀서 되튀는 바운싱(bouncing) 현상을 방지할 수 있는 것이다.In addition, as the weight of the intake valve 10 is reduced, the inertia acts in proportion to the weight by the continuous up and down reciprocation of the intake valve 10 as the engine speed increases, so that the intake valve 10 is opened. A jump phenomenon in which the valve head 12 falls further below a specified displacement, and a bouncing phenomenon in which the valve head 12 collides with the intake pipe 28 when the intake valve 10 is closed. This can be prevented.

아래의 표 1은 종래의 스틸강 재질의 흡기밸브와 본 발명에 따른 알루미늄 합금 재질의 흡기밸브를 사용할 경우 엔진의 고속 회전시 흡기밸브의 점프 현상이 발생하는 엔진의 회전수를 나타내고, 표 2는 바운싱 현상이 발생하는 엔진의 회전수를 나타낸다.Table 1 below shows the number of revolutions of the engine in which a jump phenomenon of the intake valve occurs during high-speed rotation of the engine when using the conventional steel steel intake valve and the aluminum alloy intake valve according to the present invention, Table 2 The engine speed at which bounce occurs.

상기 표 1 및 표 2에 나타난 바와 같이, 종래의 스틸강 재료인 흡기밸브(10)를 사용할 경우에는 흡기밸브(10)가 개방될 때, 점프 현상이 엔진의 회전수가 7,150(rpm)에서부터 발생하나, 본 발명에 따른 알루미늄 합금 재질의 흡기밸브(10)를 사용할 경우에는 점프 현상이 8,400(rpm)에서부터 발생하므로 점프 현상의 발생을 늦출 수 있는 것이다.As shown in Table 1 and Table 2, when using the intake valve 10 of the conventional steel steel material, when the intake valve 10 is opened, a jump phenomenon occurs from 7,150 rpm In the case of using the intake valve 10 made of aluminum alloy according to the present invention, since the jumping phenomenon occurs from 8,400 (rpm), it is possible to delay the occurrence of the jumping phenomenon.

또한, 흡기밸브(10)가 닫히는 경우에 발생하는 바운싱 현상 또한 종래에는 엔진의 회전수가 7,400(rpm)에서 발생하던 것을 본 발명에 따른 알루미늄 합금 재질의 흡기밸브(10)를 사용할 경우에는 9,000(rpm)에서부터 발생하므로 바운싱 현상의 발생을 늦출 수 있는 것이다.In addition, the bounce phenomenon that occurs when the intake valve 10 is closed is also 9,000 (rpm) when the intake valve 10 made of aluminum alloy according to the present invention that the rotational speed of the engine is conventionally generated at 7,400 (rpm) ), It can slow down the occurrence of bounce.

이상에서 상술한 바와 같이, 본 발명에 따른 자동차용 흡기밸브 및 그 제조방법에 의하면 자동차용 흡기밸브의 밸브 헤드와 밸브 스템을 알루미늄 합금을 이용하여 제조하고 태핏이나 로커 암에 접촉하는 밸브 스템 엔드 부위에는 스틸강 재질의 팁을 강제로 끼워 맞추어 흡기밸브의 중량을 경량화하여 점프 및 바운싱 현상을 방지할 수 있고, 밸브 헤드의 끝단을 평평하게 형성하여 밸브 헤드의 강성을 보완할 수 있는 효과가 있다.As described above, according to the intake valve for automobiles and the manufacturing method thereof according to the present invention, the valve head and the valve stem of the intake valve for automobiles are manufactured by using an aluminum alloy, and the valve stem end portion which contacts the tappet or rocker arm. There is an effect that can be forced to fit the tip of the steel steel material to reduce the weight of the intake valve to prevent jumps and bouncing, and to form a flat end of the valve head to compensate for the rigidity of the valve head.

Claims (3)

흡기관(28)의 개폐역할을 하며 그 하단에는 오복부(18)가 형성된 밸브 헤드(12)와 밸브 몸체에 해당하는 밸브 스템(14)과 로커 암(22) 또는 태핏과 접촉하는 밸브 스템 엔드(17)로 이루어져 있는 자동차용 흡기밸브에 있어서,Valve stem 12 corresponding to the valve head 12 and the valve stem 14 corresponding to the valve body and the rocker arm 22 or the tappet, which have an opening and closing role of the intake pipe 28 and the lower part 18 is formed at the bottom thereof. In the intake valve for automobiles consisting of (17), 상기 밸브 헤드(12)의 하단은 강도와 내마모성을 향상시키기 위하여 평평하게 형성되고, 상기 밸브 스템 엔드(17)의 끝단은 로커 암(22) 또는 태핏과의 접촉시 강도와 내마모성 향상을 위하여 스틸강 재질의 팁(16)이 강제로 끼워 맞추어진 것을 특징으로 하는 자동차용 흡기밸브.The lower end of the valve head 12 is formed flat to improve strength and wear resistance, and the end of the valve stem end 17 is made of steel steel to improve strength and wear resistance upon contact with the rocker arm 22 or the tappet. Intake valve for automobile, characterized in that the tip of the material is forcibly fitted. 스틸강 재료로 연속주조공정과, 성형과 결정을 미립화하기 위한 단조공정과, 재료의 기계적 물리적 성질을 향상시키기 위한 열처리공정과, 표면을 경화시키기 위한 고주파 경화공정으로 제조되는 자동차용 흡기밸브의 제조방법에 있어서,Manufacture of intake valve for automobile manufactured by continuous casting process of steel steel material, forging process for atomizing molding and crystal, heat treatment process to improve mechanical and physical properties of material, and high frequency curing process to harden surface In the method, 상기 흡기밸브(10)는 엔진의 고속 회전시 발생하는 점프 및 바운싱 현상을 방지하기 위하여 알루미늄 합금으로 제조되며, 밸브 스템 엔드(17)에 강제로 끼워져서 맞추어지는 팁(16)은 스틸강으로 제조되는 것을 특징으로 하는 자동차용 흡기밸브의 제조방법.The intake valve 10 is made of aluminum alloy to prevent jumping and bouncing occurring at high speed of the engine, and the tip 16, which is forcibly fitted to the valve stem end 17, is made of steel. Method for producing a car intake valve, characterized in that. 제 2 항에 있어서, 상기 흡기밸브(10)의 재료인 알루미늄 합금은 2~3(wt%)의 규소와, 8~10(wt%)의 철과 1~2(wt%)의 바나듐과 85~89(wt%)의 알루미늄으로 이루어진 것을 특징으로 하는 자동차용 흡기밸브의 제조방법.The aluminum alloy as a material of the intake valve 10 is made of 2 to 3 (wt%) of silicon, 8 to 10 (wt%) of iron and 1 to 2 (wt%) of vanadium. Method of manufacturing an intake valve for a vehicle, characterized in that made of aluminum of ~ 89 (wt%).
KR1019990053109A 1999-11-26 1999-11-26 Intake valve for vehicle KR100559623B1 (en)

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KR102002777B1 (en) * 2013-03-29 2019-07-24 오제이씨(주) Stem for gas case, and manufacturing device and manufacturing method of this

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JPH05202706A (en) * 1992-01-29 1993-08-10 Daido Steel Co Ltd Engine valve and manufacture thereof
JPH06330714A (en) * 1993-05-21 1994-11-29 Sumitomo Light Metal Ind Ltd Manufacture of heat resistance aluminum alloy made valve body
JPH09189207A (en) * 1996-01-05 1997-07-22 Fuji Oozx Inc Engine valve and manufacture thereof
JPH10252423A (en) * 1997-03-11 1998-09-22 Fuji Oozx Inc Air intake valve for internal combustion engine and manufacture thereof
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