KR100197012B1 - Automatic timer of an injection pump - Google Patents

Automatic timer of an injection pump Download PDF

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Publication number
KR100197012B1
KR100197012B1 KR1019960063388A KR19960063388A KR100197012B1 KR 100197012 B1 KR100197012 B1 KR 100197012B1 KR 1019960063388 A KR1019960063388 A KR 1019960063388A KR 19960063388 A KR19960063388 A KR 19960063388A KR 100197012 B1 KR100197012 B1 KR 100197012B1
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South Korea
Prior art keywords
piston
engine
automatic timer
fuel
pump
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KR1019960063388A
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Korean (ko)
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KR19980045213A (en
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장산익
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정몽규
현대자동차주식회사
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Priority to KR1019960063388A priority Critical patent/KR100197012B1/en
Publication of KR19980045213A publication Critical patent/KR19980045213A/en
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Publication of KR100197012B1 publication Critical patent/KR100197012B1/en

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    • 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
    • F02M59/20Varying fuel delivery in quantity or timing
    • F02M59/30Varying fuel delivery in quantity or timing with variable-length-stroke pistons
    • 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
    • F02M37/00Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04Feeding by means of driven pumps
    • F02M37/06Feeding by means of driven pumps mechanically driven

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

Abstract

본 발명은 내연기관의 연소실에 연료를 공급하는 인젝션펌프의 연료분사시점을 결정하도록 된 인젝션펌프의 자동타이머에 관한 것이다.The present invention relates to an automatic timer of an injection pump configured to determine a fuel injection time point of an injection pump for supplying fuel to a combustion chamber of an internal combustion engine.

펌프하우징(1)내에서 공급펌프(3)의 구동에 따라 연료탱크(T)로부터 송출되는 연료가 최종적으로 노즐로(12)를 통해 엔진의 연소실로 배출 분사되는 일련의 동작과정과 동시에 공급펌프(3)의 소유압력변화에 의해 왕복이송되는 자동타이머(100)내의 피스톤(14)과 연결 회전되는 롤러홀더(9)가 플런저(10)의 리프트시작시기를 바꿈으로 엔진회전속도와 송유압력에 대응하는 진각타이밍을 결정할 때, 튜팅다이얼(121)을 돌려 회전되는 나사봉(120)이 좌측 유로(13b)에서 왕복이송되고 우측 유로(13a)압력에 의해 나사봉(120)의 끝단에 면접된 상태를 유지하는 피스톤(14)의 위치를 인위적으로 조정하므로서, 피스톤의 위치인식과 조정에 의해 연료 분사효율에 따른 엔진성능과 연소환경을 고려한 진각과 지각의 다양한 특성 변화속에서 최적의 진각타이밍을 구현할 수 있는 효과를 제공하는 것이다.As the feed pump 3 is driven in the pump housing 1, the fuel pumped from the fuel tank T is finally discharged and injected into the combustion chamber of the engine through the nozzle furnace 12. The roller holder 9, which is connected to the piston 14 in the automatic timer 100, reciprocated by the change in the holding pressure of (3) and rotates, changes the starting timing of the plunger 10 to the engine rotation speed and oil pressure. When determining the corresponding progressive timing, the screw rod 120 rotated by turning the tuning dial 121 is reciprocated in the left flow passage 13b and interviewed at the end of the screw rod 120 by the right flow passage 13a pressure. By artificially adjusting the position of the piston 14 that maintains the state, the optimum position timing can be achieved at various characteristics of the advance and the perception considering the engine performance and combustion environment according to the fuel injection efficiency by the position recognition and adjustment of the piston. Can be implemented To provide that effect.

Description

인젝션펌프의 자동타이머Injection pump automatic timer

본 발명은 내연기관의 연소실에 연료를 공급하는 인젝션펌프의 연료 분사시점을 결정하도록 된 인젝션펌프의 자동타이머에 관한 것이다.The present invention relates to an automatic timer of an injection pump configured to determine a fuel injection time of an injection pump for supplying fuel to a combustion chamber of an internal combustion engine.

일반적으로 디젤용 엔진에 이용되는 인젝션펌프는 연료탱크로부터 송출되는 연료를 가압하여 엔진의 연소실내에 분사한다.In general, an injection pump used in a diesel engine pressurizes a fuel discharged from a fuel tank and injects it into a combustion chamber of the engine.

상기 인젝션펌프의 연료분사시점은 연소실의 압축행정에서 피스톤이 상사점에 도달하기전에서 도달시까지로서, 피스통의 상사점 도달전의 빠른 분사시점인 진각특성과 도달시의 늦은 분사시점인 지각특성을 자동타이머에 의해 결정하도록 되어 있다.The fuel injection point of the injection pump is from the compression stroke of the combustion chamber to before the piston reaches the top dead center, which is a fast injection time before the top dead center of the peace cylinder and a late injection time when it reaches the top dead center. Is determined by the automatic timer.

제1도는 종래 인젝션펌프의 단면도이고, 제2도는 종래 인제션펌프 자동타이머의 구성도이다.1 is a cross-sectional view of a conventional injection pump, and FIG. 2 is a block diagram of a conventional injection pump automatic timer.

도시된 바와 같이 펌프하우징(1)내에서 공급펌프(3)의 구동에 따라 연료탱크(T)로부터 송출되는 연료가 레귤레이팅 밸브(4)에 의해 송유압력이 제어되어 매카니컬거버너(5)의 흡입작동에 따라 하이드롤릭 헤드(6)의 미터링밸브(7)입구로 송입됨과 동시에, 이너챔버(2)내에서 구동축(8)과 결합된 롤러홀더(9)와 플런저(10)를 회전시켜 미터링밸브(7)를 통과한 연료가 플런저(10)내로 유입되어 압축되게 하고 플런저(10)의 딜리버리밸브(11)를 거쳐 토출구(12)를 통해 엔진의 연소실로 배출 분사된다.As shown in FIG. 5, the fuel delivered from the fuel tank T is controlled by the regulating valve 4 in accordance with the operation of the supply pump 3 in the pump housing 1 to control the mechanical governor 5. In addition to being fed into the metering valve (7) inlet of the hydraulic head (6) in accordance with the suction operation of the roller head (9) and the plunger (10) coupled to the drive shaft (8) in the inner chamber (2) The fuel passing through the metering valve 7 is introduced into the plunger 10 to be compressed and discharged to the combustion chamber of the engine through the discharge port 12 through the delivery valve 11 of the plunger 10.

이때, 자동타이머(13)는 공급펌프(3)의 송유압력에 따라 연료가 미터링밸브(7)에 송입됨과 동시에, 송유압력변화에 의해서 좌,우 왕복 이송되는피스톤(14)과 피스톤(14)에 연결되어 회전되는 롤러홀더(9)가 플런저(10)의 리프트시작시기를 바꿈으로 엔진회전속도와 송유압력에 대응하는 적정진각 타이밍을 결정하도록 되어 있다.At this time, the automatic timer 13 is the piston 14 and the piston 14 which is fed to the metering valve 7 in accordance with the oil supply pressure of the supply pump 3, and at the same time the left and right reciprocating transfer by the oil supply pressure change The roller holder 9, which is connected to and rotated, changes the start timing of the plunger 10 so as to determine an appropriate advance timing corresponding to the engine rotational speed and the oil supply pressure.

또한, 상기 자동타이머(13)내에서 피스톤(14)의 좌측에 결합된 스프링(15)은 엑셀레이터조작에 따라 엔진구동이 고속고부하로 갈수록 시프톤(14)을 기준으로 미터링밸브(7)와 연결된 피스톤(14)우측의 유로(13a) 압력이 커지고 공급펌프(3)와 연결된 피스톤(14)좌측의 유로(13b)압력이 작아짐에 따라 피스톤(14)의 위치가 저압측으로 이동하여 진각특성을 나타내다가 엑셀레이터조작을 해제하면 인장력에 의해 피스톤(14)이 복귀되도록 하여 지각특성을 나타내도록 한다.In addition, the spring 15 coupled to the left side of the piston 14 in the automatic timer 13 is connected to the metering valve 7 based on the shift tone 14 as the engine drive toward the high speed and high load according to the accelerator operation. As the pressure of the flow passage 13a on the right side of the piston 14 increases and the pressure of the flow passage 13b on the left side of the piston 14 connected to the supply pump 3 decreases, the position of the piston 14 moves to the low pressure side to show the progressive characteristics. When the accelerator operation is released, the piston 14 is returned by the tensile force to exhibit the perceptual characteristics.

그러나, 전술한 바와 같은 종래 인젝션펌프의 자동타이머는 피스톤(14)의 이송범위가 스프링(15)의 인장력에 의해 한정되고 또, 피스톤(14)의 정확한 위치를 인식할 수 없어 피스톤(14)의 위치를 인위적으로 조정할 수 없었다.However, in the automatic timer of the conventional injection pump as described above, the conveying range of the piston 14 is limited by the tension force of the spring 15, and the exact position of the piston 14 cannot be recognized. The position could not be artificially adjusted.

즉, 엔진의 구동이 고속고부하로 갈수록 피스톤(14)이 저압측으로 이동하여 진각특성을 나타내므로 디젤엔진의 경우 연료의 분사효율이 좋아지고 엔진 RPM이 상승되는 고출력을 갖지만 엔진과부화와 배기가스 및 소음 등의 연소환경을 고려해 볼 때 진각과 지각특성의 사이에서 적절한 연료 분사효율과 엔진성능의 최적상태를 위해 피스톤(14)의 위치조정과 인식에 따른 진작과 지각특성의 변화구현 즉, 최적의 적정진각 타이밍을 구현할 수 없었다.In other words, as the engine is driven at high speed and high load, the piston 14 moves to the low pressure side to show the progressive characteristics. Thus, in the case of diesel engines, the injection efficiency of the fuel is improved and the engine RPM is increased, but the engine overload, exhaust gas and noise are increased. In consideration of the combustion environment, the change of the acceleration and perception characteristics according to the positioning and recognition of the piston 14 for the optimum fuel injection efficiency and the optimum performance of the engine between the advance and perception characteristics, that is, the optimum Advance timing could not be achieved.

또한, 상기 인젝션펌프는 엔진개발단계에서 연료분사효율에 따른 엔진성능의 극대화와 연소환경을 위해 진각타이밍에 대한 조정작업은 필연적으로 거치도록 되어 있다.In addition, the injection pump is inevitably required to adjust the advance timing in order to maximize the engine performance and combustion environment according to the fuel injection efficiency in the engine development stage.

본 발명은 전술한 바와 같은 종래기술의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 피스톤의 위치인식과 조정에 따른 진각과 지각의 다양한 특성 변화속에서 최적의 적정진각 타이밍을 구현하기 위해 피스톤의 위치를 인위적으로 조정할 수 있도록 튜닝수단이 구비된 인젝션펌프의 자동타이머를 제공함에 있다.The present invention is to solve the problems of the prior art as described above, the object of the present invention is to realize the optimum proper timing of the piston in order to realize the optimum proper timing in the various characteristics of the advance and perception according to the position recognition and adjustment of the piston It is to provide an automatic timer of the injection pump is provided with a tuning means to artificially adjust the position.

제1도는 종래 인젝션펌프의 단면도이다.1 is a cross-sectional view of a conventional injection pump.

제2도는 종래 인제션펌프 자동타이머의 구성도이다.2 is a block diagram of a conventional induction pump automatic timer.

제3도는 본 발명에 따른 인젝션펌프의 자동타이머로서, 피스톤의 위치조정을 위한 튜닝수단이 결합된 자동타이머를 도시한 단면도이다.3 is a cross-sectional view showing an automatic timer of the injection pump according to the present invention, in which a tuning means for adjusting the position of the piston is coupled.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

100 : 자동타이머 110 : 고정구100: automatic timer 110: fixture

111 : 나사공 120 : 나사봉111: screw hole 120: screw rod

121 : 튜닝다이얼121: tuning dial

상기 목적을 달성하기 위한 본 발명에 따른 인젝션펌프의 자동타이머는 피스톤의 위치를 인위적으로 조정하는 튜닝수단으로, 펌프하우징 내에서 피스톤의 좌측 유로위치로 펌프하우징의 외측에 결합되는 나사공을 포함한 고정구와, 상기 펌프하우징의 좌측 유로측 외부에 돌출되는 튜닝다이얼을 포함아여 고정의 나사공과 펌프하우징의 좌측 유로를 관통하여 삽입 결합되며 피스톤의 좌측에 면접되는 나사봉이 구비됨에 특징이 있다.The automatic timer of the injection pump according to the present invention for achieving the above object is a tuning means for artificially adjusting the position of the piston, a fixture including a screw hole coupled to the outside of the pump housing to the left channel position of the piston in the pump housing And, including a tuning dial protruding to the outside of the left side of the pump housing, it is characterized in that it is inserted through the left side passage of the fixed screw hole and the pump housing, the screw rod is interviewed on the left side of the piston housing.

이하에서는 본 발명에 따른 인젝션펌프의 자동타이머를 첨부도면에 참조하여 상세히 설명한다.Hereinafter, the automatic timer of the injection pump according to the present invention will be described in detail with reference to the accompanying drawings.

제2도에 도시된 바와 같이 본 발명에 따른 인젝션펌프의 자동타이머(100)는 펌프하우징(1)내에서 피스톤(14)의 좌측 유로(13b)위치로 펌프하우징(1)의 외측에 결합되는 나사공(111)을 포함한 고정구(110)와, 상기 펌프하우징(1)의 좌측유로(13b)에서 외부에 돌출되는 튜닝다이어얼(121)을 포함하여 고정구(110)의 나사공(111)과 펌프 하우징(1)을 관통하여 삽입되며 피스톤(14)의 좌측면에 면접되는 나사봉(120)이 구비되어 있다.As shown in FIG. 2, the automatic timer 100 of the injection pump according to the present invention is coupled to the outside of the pump housing 1 to the position of the left flow passage 13b of the piston 14 in the pump housing 1. A fastener 110 including a screw hole 111 and a screw hole 111 of the fastener 110 including a tuning dial 121 protruding from the left channel 13b of the pump housing 1 to the outside. A threaded rod 120 is inserted through the pump housing 1 and interviewed on the left side of the piston 14.

상기 고정구(110)의 결합에 대해서는 펌프하우징(1)에 볼트로 체결하거나, 스폿용접 등에 의해 결합시킬 수 있으므로 이를 한정하지는 않는다.Coupling of the fixture 110 may be coupled to the pump housing 1 with a bolt or by spot welding, but is not limited thereto.

이와 같은 본 발명에 따른 인젝션펌프의 자동타이머에 의한 인젝션펌프와의 동작관계를 설명하면 다음과 같다.Referring to the operation relationship with the injection pump by the automatic timer of the injection pump according to the present invention as follows.

제1도의 종래기술과 같이 펌프하우징(1)내에서 공급펌프(3)의 구동에 따라 연료탱크(T)로부터 송출된 연료가 여러과정을 거쳐 최종적으로 토출구(12)를 통해 엔진의 연소실로 배출 분사되는 일련을 동작과정이 이루어진다.As shown in the prior art of FIG. 1, the fuel discharged from the fuel tank T is discharged to the combustion chamber of the engine through the discharge port 12 through several processes in accordance with the operation of the feed pump 3 in the pump housing 1. A series of injections are performed.

이때, 상기 자동타이머(100)는 튜닝다이일(121)을 돌려 나사봉(120)이 회전됨에 따라 펌프 하우징(1)내의 좌측 유로(13b)에서 왕복 이송운동을 하는 나사봉(120)의 끝단에 상대적으로 피스톤(14)우측의 큰 유로(13a)압력에 의해서 피스톤(14)이 밀착된 상태를 유지하고 있어 튜닝다이얼(121)의 조정에 따라 피스톤(14)의 위치를 인위적으로 조정할 수 있게 된다.At this time, the automatic timer 100 is the end of the screw rod 120 for the reciprocating transfer movement in the left flow passage (13b) in the pump housing 1 as the screw rod 120 is rotated by turning the tuning die 121 The piston 14 is maintained in close contact with the large flow passage 13a pressure on the right side of the piston 14 so that the position of the piston 14 can be artificially adjusted by adjusting the tuning dial 121. do.

따라서, 공급펌프(3)의 송유압력변화에 의해서 왕복 이송되는 자동타이머(100)내의 피스톤(14)과 연결 회전되는 롤러홀더(9)가 플런저(10)의 리프트시작시기를 바꿈으로 엔진회전속도와 송유압력에 대응하는 진각 타이밍을 결정하게 되며 이때, 튜닝다이얼(121)로 인위적으로 조정된 피스톤(14)의 위치에 따라 진각 타이밍이 달라지는 다양한 특성변화를 갖게 된다.Therefore, the roller holder 9 connected to the piston 14 in the automatic timer 100 reciprocated by the oil supply pressure change of the feed pump 3 rotates the engine rotation speed by changing the start timing of the plunger 10. And the advance timing corresponding to the oil supply pressure is determined, and at this time, the advance timing is varied according to the position of the piston 14 artificially adjusted by the tuning dial 121.

그리하여 본 발명에 따른 인젝션펌프의 자동타이머는 타이머내 피스톤의 위치인식과 피스톤의 위치변환이 자재하여 연료부사효율에 따른 엔진성능과 연소환경을 고려한 진각과 지각 특성의 다양한 변화속에서 최적의 적정진각 타이밍을 구현할 수 있는 효과를 제공하는 것이다.Thus, the automatic timer of the injection pump according to the present invention is equipped with the position recognition of the piston in the timer and the position change of the piston, so that the optimum appropriate advance at various changes in the advance and perception characteristics in consideration of engine performance and combustion environment according to fuel injection efficiency The effect is to provide timing.

Claims (1)

펌프하우징(1)내에서 피스톤(14)의 좌측 유로(13b)위치로 펌프하우징(1)의 외측에 결합되는 나사공(111)을 포함한 고정구(110)와, 상기 펌프하우징(1)의 좌측유로(13b)에서 외부에 돌출되는 튜닝다이얼(121)을 포함하여 고정구(110)의 나사공(111)과 펌프 하우징(1)을 관통하여 삽입되며 피스톤(14)의 좌측면에 면접되는 나사봉(120)이 구비됨을 특징으로 한 인젝션펌프의 자동타이머.Fixture 110 including a screw hole 111 coupled to the outside of the pump housing 1 to the left channel 13b position of the piston 14 in the pump housing 1, and the left side of the pump housing 1 A screw rod inserted through the screw hole 111 of the fixture 110 and the pump housing 1, including the tuning dial 121 protruding from the flow path 13b, and interviewed the left side of the piston 14. Automatic timer of the injection pump characterized in that the 120 is provided.
KR1019960063388A 1996-12-10 1996-12-10 Automatic timer of an injection pump KR100197012B1 (en)

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KR100197012B1 true KR100197012B1 (en) 1999-06-15

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