KR20030001000A - Target wheel of crank shaft - Google Patents

Target wheel of crank shaft Download PDF

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Publication number
KR20030001000A
KR20030001000A KR1020010037291A KR20010037291A KR20030001000A KR 20030001000 A KR20030001000 A KR 20030001000A KR 1020010037291 A KR1020010037291 A KR 1020010037291A KR 20010037291 A KR20010037291 A KR 20010037291A KR 20030001000 A KR20030001000 A KR 20030001000A
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KR
South Korea
Prior art keywords
target wheel
crankshaft
engine
outer periphery
main body
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Application number
KR1020010037291A
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Korean (ko)
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KR100427936B1 (en
Inventor
유재웅
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현대자동차주식회사
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Priority to KR10-2001-0037291A priority Critical patent/KR100427936B1/en
Publication of KR20030001000A publication Critical patent/KR20030001000A/en
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Publication of KR100427936B1 publication Critical patent/KR100427936B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/02—Trunnions; Crank-pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding

Abstract

PURPOSE: A target wheel of crankshaft is provided, in which target wheel is made of a synthetic resin material, to thereby reduce weight of the engine and manufacturing cost and procedures. CONSTITUTION: A target wheel(20) has a disk-shaped main body(21) where teeth are formed at a constant interval along the outer periphery of the main body of the target wheel in such a manner that the teeth correspond to a crank angle sensor(40). The target wheel is mounted to an end of the crankshaft so as to measure rotation frequency of an engine and rotation angle of the crankshaft. The disk-shaped main body is made of a synthetic resin material, and has an outer periphery where metal pins(30) are insert molded at a constant interval. A missing tooth part(24) is formed in the section of 15 to 20 degrees at the outer periphery of the main body of the target wheel.

Description

크랭크 축의 타겟 휠{Target wheel of crank shaft}Target wheel of crank shaft

본 발명은 크랭크 축의 타겟 휠에 관한 것으로, 보다 상세하게는 엔진의 회전수 및 크랭크 축의 회전각을 측정하여 엔진을 제어하기 위한 타겟 휠의 몸체를합성수지재로 형성하고, 그 몸체의 외주연에 금속재의 핀을 일정간격으로 인서트 몰딩한 크랭크 축의 타겟 휠에 관한 것이다.The present invention relates to a target wheel of the crankshaft, and more particularly, to form the body of the target wheel for controlling the engine by measuring the rotational speed of the engine and the rotational angle of the crankshaft with a synthetic resin material, the metal material on the outer periphery of the body It relates to a target wheel of the crankshaft insert molding the pins at regular intervals.

일반적으로 엔진에는 엔진의 점화시기나 분사시기, 분사량 등을 전자적으로 제어하기 위한 전자제어장치(ECU)가 장착된다.In general, the engine is equipped with an electronic control unit (ECU) for electronically controlling the ignition timing, injection timing, injection amount, and the like of the engine.

상기와 같이 엔진을 전자적으로 제어하기 위해서 엔진의 크랭크 축의 일단에는 엔진의 회전속도에 대한 정보 및 크랭크 축의 회전각, 예를 들면 현재 1번 실린더의 피스톤은 상사점(TDC) 몇 도 이전에 위치해 있는가 등에 대한 정보를 파악하기 위한 타겟 휠이 장착된다. 또한 상기한 타겟 휠과 대응되는 크랭크 앵글 센서가 장착된다.In order to control the engine electronically as described above, at one end of the crankshaft of the engine, information about the rotational speed of the engine and the angle of rotation of the crankshaft, for example, the piston of cylinder number 1, is located before the top dead center (TDC). It is equipped with a target wheel for grasping information about the back. In addition, a crank angle sensor corresponding to the target wheel is mounted.

도 3은 상기한 타겟 휠(10)을 설명하기 위한 도면으로서, 원판 형상의 몸체(11) 외주에는 다수의 이(12)가 일정간격으로 연속적으로 형성되어 있다. 상기 몸체(11)의 중앙으로는 크랭크 축과 결합하기 위한 축공(13)이 형성되며, 상기 축공(13)의 외측으로는 크랭크 축에 결합되기 위한 볼트공(14)이 여러개 형성되어 있다. 특히, 약 15°~ 20°도 각도에 해당되는 몸체(11)의 외주연에는 미싱 투스(Missing tooth)(15)부가 형성되는데, 상기 미싱 투스부(15)는 외주연에 이가 연속되는 형상에서 일정 구간 동안 이가 빠진 형상이 되는 것이다, 이 미싱 투스부(15)는 엔진에 고정형성되어 엔진의 회전수를 측정하는 크랭크 앵글 센서(16)로부터 상기 타겟 휠(10)이 한바퀴 회전된 것으로 판단되도록 하기 위한 것이다. 상기 크랭크 앵글 센서(16)는 전자 픽업이나 자기저항 센서 등으로 구성된다.3 is a view for explaining the above-described target wheel 10, a plurality of teeth 12 are continuously formed at a predetermined interval on the outer periphery of the disk-shaped body (11). A shaft hole 13 is formed at the center of the body 11 to engage with the crank shaft, and a plurality of bolt holes 14 are formed at the outside of the shaft hole 13 to be coupled to the crank shaft. In particular, the outer periphery of the body 11 corresponding to the angle of about 15 ° to 20 ° degree is formed with a missing tooth (Missing tooth) (15), the missing tooth portion (15) in the shape that is continuous to the outer periphery The missing tooth portion 15 is fixed to the engine so that it is determined that the target wheel 10 has been rotated once from the crank angle sensor 16 measuring the rotational speed of the engine. It is to. The crank angle sensor 16 is composed of an electronic pickup, a magnetoresistance sensor, and the like.

따라서 엔진이 구동될 때에, 크랭크 앵글 센서(16)에서 상기한 타겟 휠(10)의 외주연에 형성된 이(12)의 수가 일정 시간 내에 얼마만큼 측정되는가를 카운트하여 엔진의 회전수를 파악하며, 또한 상기한 크랭크 앵글 센서(16)를 통과하는 이의 각도를 모니터링하여 크랭크 축의 회전각을 파악하게 된다.Therefore, when the engine is driven, the number of teeth 12 formed on the outer circumference of the target wheel 10 by the crank angle sensor 16 is counted to determine how many times the number of teeth 12 is measured within a predetermined time, and the engine rotation speed is determined. In addition, by monitoring the angle of the teeth passing through the crank angle sensor 16 to determine the rotation angle of the crank shaft.

이와 같이 파악된 엔진의 회전수와 크랭크 축의 회전각은 엔진의 전자제어장치(EUC)에 전달되어 엔진의 운전환경을 제어하게 된다.The rotation speed of the engine and the rotation angle of the crankshaft thus determined are transmitted to the electronic control unit (EUC) of the engine to control the operating environment of the engine.

그러나 상기와 같은 종래의 타겟 휠은 금속재로 소결가공을 거쳐 형성되므로서 중량이 무거울 뿐만 아니라, 그 외주연에 형성되는 이와 볼트공을 형성하기 위해서는 프레싱과 같은 2차가공을 해야하므로서 가공 공정 많고 제조원가가 많이 드는 문제점이 있었다. 또한, 크랭크 앵글 센서의 위치불량이 발생될 경우에 외주연으로 돌출형성된 이가 깨지게 되는 문제점이 있었다.However, the conventional target wheel as described above is not only heavy because it is formed through a sintering process with a metal material, and in order to form teeth and bolt holes formed on the outer circumference thereof, a second processing such as pressing is required, and thus, a lot of processing process and manufacturing cost There was a lot of trouble. In addition, there is a problem that the teeth formed in the outer periphery is broken when the position error of the crank angle sensor occurs.

따라서 본 발명은 상기와 같은 문제점을 해결하기 위해서 안출된 것으로서, 보다 상세하게는 엔진의 회전수 및 크랭크 축의 회전각을 측정하여 엔진을 제어하기 위한 타겟 휠의 몸체를 합성수지재로 형성하고, 그 몸체의 외주연에 금속재의 핀을 일정간격으로 인서트 몰딩한 크랭크 축의 타겟 휠을 제공하는 데 목적이 있는 것이다.Therefore, the present invention has been made to solve the above problems, more specifically, the body of the target wheel for controlling the engine by measuring the rotational speed of the engine and the rotation angle of the crankshaft to form the synthetic resin material, the body It is an object of the present invention to provide a target wheel of a crankshaft which is insert-molded at regular intervals with a metal pin on the outer circumference of the metal.

본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,

원판 형상의 몸체 외주연으로 크랭크 앵글 센서와 대응되는 이가 일정간격으로 형성되고, 크랭크 축의 일단에 장착되어 엔진의 회전수 및 크랭크 축의 회전각을 측정하기 위한 타겟 휠에 있어서,In the target wheel for measuring the rotational speed of the engine and the rotational angle of the crankshaft is formed on the outer periphery of the disk-shaped body corresponding to the crank angle sensor at regular intervals, is mounted on one end of the crankshaft,

원판 형상의 몸체가 합성수지재로 사출되어지되, 상기한 몸체의 외주연에는 금속재의 핀이 일정간격으로 인서트 사출되는 것을 특징으로 한다.The disk-shaped body is injected into the synthetic resin material, the outer periphery of the body is characterized in that the insert of the metal pin is inserted at a predetermined interval.

도 1은 본 발명에 의해 형성된 타겟 휠의 사시도.1 is a perspective view of a target wheel formed by the present invention.

도 2는 본 발명에 의해 형성된 타겟 휠의 단면도.2 is a cross-sectional view of a target wheel formed by the present invention.

도 3은 종래 타겟 휠을 도시한 도면.3 illustrates a conventional target wheel.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

20 : 타겟 휠20: target wheel

21 : 몸체21: body

22 : 축공22: shaft work

23 : 볼트공23: bolt hole

24 : 미싱 투스부24: sewing machine

30 : 핀30: pin

40 : 크랭크 앵글 센서40: crank angle sensor

이하, 본 발명의 실시예를 첨부한 도면과 함께 상세하게 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail.

도 1은 본 발명에 의해 형성된 타겟 휠의 사시도이고, 도 2는 본 발명에 의해 형성된 타겟 휠의 단면도이다. 도면 중에 표시되는 도면부호 20은 본 발명에 의해 형성되는 타겟 휠을 지시하는 것이다.1 is a perspective view of a target wheel formed by the present invention, and FIG. 2 is a cross-sectional view of the target wheel formed by the present invention. Reference numeral 20 displayed in the drawing indicates a target wheel formed by the present invention.

상기한 타겟 휠(20)의 몸체(21)는 합성수지재로 사출형성되는데, 상기 몸체(21)를 사출하는 과정에서 그 외주연에 금속재의 핀(30)이 일정간격으로 인서트 사출된다. 상기한 핀(30)은 종래의 타겟 휠(10)에서는 이(12)에 해당하는 것으로, 크랭크 앵글 센서(40)와 대응되는 것이다.The body 21 of the target wheel 20 is injection-molded with a synthetic resin material, in the process of injecting the body 21, the injection pin 30 of the metal material is inserted injection molding at regular intervals. The pin 30 corresponds to the tooth 12 in the conventional target wheel 10 and corresponds to the crank angle sensor 40.

상기한 핀(30)은 몸체(21)의 외주연 측으로 일측면 만이 노출되는 것이 바람직하며 특히, 타겟 휠(20)의 회전시에 원심력에 의해서 상기 핀(30)이 빠지지 않도록 인서트 사출되어야 한다.It is preferable that only one side of the pin 30 is exposed to the outer circumferential side of the body 21, and in particular, the pin 30 should be insert-extruded so that the pin 30 does not fall out by centrifugal force when the target wheel 20 is rotated.

그리고 상기한 몸체(11) 외주연에는 미싱 투스(Missing tooth)부(24)가 형성되는데 그 각도는 종래와 마찬가지로 15°~ 20°도 각도의 구간에 해당된다. 이 미싱 투스부(24) 구간은 매끄러운 곡면으로 형성되는 것이 바람직하다.And the outer periphery of the body 11 has a missing tooth portion (Missing tooth) 24 is formed, the angle corresponds to the section of the angle of 15 ° ~ 20 ° as in the prior art. The section of the sewing tooth portion 24 is preferably formed of a smooth curved surface.

또한, 상기한 몸체(21)의 중앙부에는 축공(22)이 형성되고, 상기 축공(22)의외측으로 크랭크 축에 장착되기 위한 볼트공(23)이 여러 개 형성된다.In addition, the shaft hole 22 is formed in the central portion of the body 21, a plurality of bolt holes 23 for mounting on the crank shaft to the outside of the shaft hole 22 is formed.

이상과 같이 형성되는 타겟 휠의 작동 상태를 상세하게 설명하면 다음과 같다.Referring to the operation state of the target wheel formed as described above in detail as follows.

엔진이 가동되면 피스톤의 상하이동과 함께 크랭크 축이 회전하게 된다. 이 때 엔진의 회전수를 측정하기 위해 상기 크랭크 축의 일단에 장착된 타겟 휠(20)이 상기 크랭크 축과 일체로 회전하게 된다.When the engine is running, the crankshaft rotates with the shank of the piston. At this time, the target wheel 20 mounted on one end of the crankshaft rotates integrally with the crankshaft to measure the engine speed.

이 과정에서 엔진의 일측에 고정형성된 크랭크 앵글 센서(40)에서는 상기한 타겟 휠(20)의 회전을 모니터링하게 된다. 즉, 일정시간 동안에 검출되는 상기한 핀(30)이 수 즉, 펄스수를 카운트하거나 펄스 사이의 시간을 특정하여 엔진의 회전수를 측정하게 된다. 또한, 상기한 크랭크 앵글 센서(40)를 통과하는 핀(30)의 각도를 모니터링하여 크랭크 축의 회전각을 파악하게 된다.In this process, the crank angle sensor 40 fixed to one side of the engine monitors the rotation of the target wheel 20. That is, the pin 30 detected during a predetermined time counts the number, that is, the number of pulses or specifies the time between the pulses to measure the rotation speed of the engine. In addition, the angle of the pin 30 passing through the crank angle sensor 40 is monitored to determine the rotation angle of the crank shaft.

이상과 같은 타겟 휠(20)은 그 제조과정에서 중량이 가벼운 합성수지재로 형성되므로서 엔진의 경량화가 가능하게 되며, 상기 타겟 휠(20)을 제조하는 공정이 단축되는 장점이 있다.The target wheel 20 as described above is made of a light weight synthetic resin material in the manufacturing process it is possible to reduce the weight of the engine, there is an advantage that the process for manufacturing the target wheel 20 is shortened.

또한, 타겟 휠(20)의 외주연에 이가 돌출되지 않고 매끄럽게 형성되기 때문에 크랭크 앵글 센서(40)와 닿게 되는 경우라도 센싱부(핀 혹은 이)가 깨지지 않게 되는 장점이 있다.In addition, since the teeth are not protruding smoothly on the outer circumference of the target wheel 20, the sensing part (pin or tooth) does not break even when the crank angle sensor 40 comes into contact.

상기와 같이 형성되는 타겟 휠은 그 몸체가 합성수지재로 형성되므로서 엔진을 경량화할 수 있으며, 타겟 휠의 이를 후가공하는 공정이 줄어들게 되는 장점이있으며, 크랭크 앵글 센서의 위치가 불안정하게 되어 타겟 휠의 외주연과 부딪치더라도 센싱부가 손상되지 않는 장점이 있는 것이다.The target wheel formed as described above has the advantage that the body can be made lightweight by the synthetic resin material, the process of post-processing the target wheel teeth is reduced, and the position of the crank angle sensor becomes unstable Even if it hits the outer periphery, there is an advantage that the sensing unit is not damaged.

Claims (2)

원판 형상의 몸체 외주연으로 크랭크 앵글 센서와 대응되는 이가 일정간격으로 형성되고, 크랭크 축의 일단에 장착되어 엔진의 회전수 및 크랭크 축의 회전각을 측정하기 위한 타겟 휠에 있어서,In the target wheel for measuring the rotational speed of the engine and the rotational angle of the crankshaft is formed on the outer periphery of the disk-shaped body corresponding to the crank angle sensor at regular intervals, is mounted on one end of the crankshaft, 원판 형상의 몸체(21)가 합성수지재로 사출되어지되, 상기한 몸체(21)의 외주연에는 금속재의 핀(30)이 일정간격으로 인서트 사출되는 것을 특징으로 하는 크랭크 축의 타겟 휠.The disc-shaped body 21 is injected into a synthetic resin material, the target pin of the crankshaft, characterized in that the insert 30 of the metal pin 30 is inserted into the injection molding at a predetermined interval on the outer periphery of the body (21). 제 1 항에 있어서,The method of claim 1, 상기한 몸체(21) 외주연의 15°~ 20°도 각도의 구간에는 핀(30)이 형성되지 않는 미싱 투스부(24)가 형성되는 것을 특징으로 하는 크랭크 축의 타겟 휠.The target wheel of the crankshaft, characterized in that the missing tooth portion 24 is formed in the section of the body 21, the outer periphery of the angle of 15 ° ~ 20 ° angle pin 30 is not formed.
KR10-2001-0037291A 2001-06-28 2001-06-28 Target wheel of crank shaft KR100427936B1 (en)

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GB2534249A (en) * 2015-07-15 2016-07-20 Ford Global Tech Llc An engine trigger wheel

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US4355613A (en) * 1980-12-29 1982-10-26 The Bendix Corporation Ignition advance timing system
JPS62129717A (en) * 1985-11-30 1987-06-12 Toyota Motor Corp Pulse gear for rotor sensor
JPH05340950A (en) * 1992-06-05 1993-12-24 Nissan Motor Co Ltd Rotating body for measuring rotational speed of wheel and manufacture thereof
KR19980051029U (en) * 1996-12-30 1998-10-07 박병재 Car Tom Wheel
EP1089059B1 (en) * 1999-09-28 2007-09-26 Snap-On Equipment GmbH Wheel balancing machine for a carwheel with compact angular encoder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2534249A (en) * 2015-07-15 2016-07-20 Ford Global Tech Llc An engine trigger wheel
GB2534249B (en) * 2015-07-15 2017-07-26 Ford Global Tech Llc An engine trigger wheel
US10253689B2 (en) 2015-07-15 2019-04-09 Ford Global Technologies, Llc Engine trigger wheel
RU2719777C2 (en) * 2015-07-15 2020-04-23 Форд Глобал Текнолоджиз, Ллк Engine impulse wheel

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