KR100435970B1 - Ruduction apparatus of intake noise in CNG Engine - Google Patents
Ruduction apparatus of intake noise in CNG Engine Download PDFInfo
- Publication number
- KR100435970B1 KR100435970B1 KR10-2002-0035197A KR20020035197A KR100435970B1 KR 100435970 B1 KR100435970 B1 KR 100435970B1 KR 20020035197 A KR20020035197 A KR 20020035197A KR 100435970 B1 KR100435970 B1 KR 100435970B1
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- South Korea
- Prior art keywords
- intake
- valve
- engine
- exhaust
- cng
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- 238000010586 diagram Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- 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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/09—Reducing noise
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- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
본 발명은 CNG 엔진이 탑재된 차량의 상용차량에서 엑셀 페달 오프시에 흡기부압의 역류에 의한 흡기소음이 발생되는 것을 방지하기 위한 CNG 상용차량의 흡기소음 저감장치에 관한 것으로,,The present invention relates to an intake noise reduction device of a CNG commercial vehicle for preventing the intake noise generated by the reverse flow of the intake negative pressure when the pedal pedal off in the commercial vehicle of the vehicle equipped with the CNG engine,
흡기라인의 도중에 흡기밸브가 형성되고, 터보차저 후방의 배기라인의 도중에 배기밸브가 형성되는 CNG 엔진의 흡기 시스템에 있어서,In the intake system of the CNG engine in which the intake valve is formed in the middle of the intake line, and the exhaust valve is formed in the middle of the exhaust line behind the turbocharger.
엔진의 회전수를 측정하기 위한 RPM 센서와;An RPM sensor for measuring the rotation speed of the engine;
운전자의 엑셀페달 조작에 따라 변동되는 스로틀 밸브의 개도량을 측정하는 스로틀밸브 개도량 센서와;A throttle valve opening amount sensor for measuring an opening amount of a throttle valve which varies according to an operator's accelerator pedal operation;
상기한 RPM센서와 스로틀밸브 개도량 센서에서 측정된 결과에 의해서 엔진상태가 급감속상태일 경우에 상기한 흡기밸브가 닫히도록 제어하는 제어부; 로 구성되는 것을 특징으로 한다.A control unit for controlling the intake valve to close when the engine state is suddenly decelerated by the results measured by the RPM sensor and the throttle valve opening amount sensor; Characterized in that consists of.
Description
본 발명은 CNG 상용차량의 흡기소음 저감장치에 관한 것으로서, 보다 상세하게는 CNG 엔진이 탑재된 차량의 상용차량에서 엑셀 페달 오프시에 흡기부압의 역류에 의한 흡기소음이 발생되는 것을 방지하기 위한 CNG 상용차량의 흡기소음 저감장치에 관한 것이다.The present invention relates to a device for reducing intake noise of a CNG commercial vehicle. More specifically, the present invention relates to a CNG for preventing intake noise caused by a reverse flow of intake negative pressure when an accelerator pedal is turned off in a commercial vehicle equipped with a CNG engine. The present invention relates to an intake noise reduction device for a commercial vehicle.
일반적으로 CNG 엔진이 탑재되는 상용차량은 도 2와 같이 엔진(10)의 양측으로 흡기라인(11)과 배기라인(12)이 형성되고, 상기 흡기라인(11)에는 스로틀 밸브(14)가 내장된 스로틀 바디(13)가 연결된다.In general, a commercial vehicle on which a CNG engine is mounted has an intake line 11 and an exhaust line 12 formed at both sides of the engine 10 as shown in FIG. 2, and a throttle valve 14 is built in the intake line 11. Throttle body 13 is connected.
그리고 상기한 스로틀 바디(13)와 에어클리너(15)가 연결되는 흡기라인(11)의 도중에는 터보차저(16)와 인터쿨러(17)가 형성된다. 터보차저(17)는 상기한 배기라인(12)에서 배출되는 배기가스의 압력을 이용하여 에어클리너(15)를 통과하여 스로틀바디(13) 측으로 공급되는 흡입공기를 가압하기 위한 것이고, 인터쿨러(13)는 상기한 터보차저(16)의 가압에 의해서 가열된 흡입공기의 온도를 낮추는 역할을 하는 것이다.The turbocharger 16 and the intercooler 17 are formed in the middle of the intake line 11 to which the throttle body 13 and the air cleaner 15 are connected. The turbocharger 17 is for pressurizing the intake air supplied through the air cleaner 15 to the throttle body 13 using the pressure of the exhaust gas discharged from the exhaust line 12, and the intercooler 13. ) Serves to lower the temperature of the intake air heated by the pressurization of the turbocharger 16.
한편, 상용차량의 경우에는 주행 중에 신속하고 안전한 제동을 위하여 배기 브레이크 시스템이 도면과 같이 마련된다. 즉, 도면에서와 같이 흡기라인(12)의 도중과 배기라인(12)의 도중에는 액츄에이터(23,24)에 의해 작동되는 흡기밸브(21) 및 배기밸브(22)가 장착된다. 상기 액츄에이터(23,24)는 운전자의 배기 브레이크 스위치(25)의 조작여부에 따라서 ECU(26)에 의해 제어되어 릴레이(27)와 연결된다. 따라서 운전자가 배기 브레이크 스위치(25)를 작동시켜 릴레이(26)에 신호가 전달되면 에어탱크(28)의 공압이 액츄에이터(23,24)에 전달되어 흡기밸브(21) 및 배기밸브(22)가 닫히도록 구성된 것이다.On the other hand, in the case of a commercial vehicle, an exhaust brake system is provided as shown in the drawing for fast and safe braking while driving. That is, the intake valve 21 and the exhaust valve 22 which are operated by the actuators 23 and 24 are mounted in the middle of the intake line 12 and the exhaust line 12 as shown in the drawing. The actuators 23 and 24 are controlled by the ECU 26 and connected to the relay 27 depending on whether the driver's exhaust brake switch 25 is operated. Therefore, when the driver operates the exhaust brake switch 25 to transmit a signal to the relay 26, the pneumatic pressure of the air tank 28 is transmitted to the actuators 23 and 24 so that the intake valve 21 and the exhaust valve 22 are closed. It is configured to close.
그러나 상기와 같은 흡기 시스템이 적용된 CNG 엔진이 탑재된 상용차량을 고속으로 운행하던 중 급감속하게 될 때에 스로틀 밸브가 닫히면서 인터쿨러 내에 압력이 높아지므로서 역류가 발생하여 흡기 밸브와 마찰되어 소음이 발생되는 문제점이 있었다.However, when the commercial vehicle equipped with the CNG engine with the intake system as described above is rapidly decelerated, the throttle valve is closed and the pressure is increased in the intercooler. There was a problem.
따라서 본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서, CNG 엔진이 탑재된 차량의 상용차량에서 엑셀 페달 오프시에 흡기부압의 역류에 의한 흡기소음이 발생되는 것을 방지하기 위한 CNG 상용차량의 흡기소음 저감장치를 제공하는 데 목적이 있다.Accordingly, the present invention is a means for achieving the above object, the intake of CNG commercial vehicles for preventing the intake noise generated by the reverse flow of the intake negative pressure when the accelerator pedal is off in the commercial vehicle of the vehicle equipped with the CNG engine It is an object to provide a noise reduction device.
본 발명은 상기와 같은 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,
흡기라인의 도중에 흡기밸브가 형성되고, 터보차저 후방의 배기라인의 도중에 배기밸브가 형성되는 CNG 엔진의 흡기 시스템에 있어서,In the intake system of the CNG engine in which the intake valve is formed in the middle of the intake line, and the exhaust valve is formed in the middle of the exhaust line behind the turbocharger.
엔진의 회전수를 측정하기 위한 RPM 센서와;An RPM sensor for measuring the rotation speed of the engine;
운전자의 엑셀페달 조작에 따라 변동되는 스로틀 밸브의 개도량을 측정하는 스로틀밸브 개도량 센서와;A throttle valve opening amount sensor for measuring an opening amount of a throttle valve which varies according to an operator's accelerator pedal operation;
상기한 RPM센서와 스로틀밸브 개도량 센서에서 측정된 결과에 의해서 엔진상태가 급감속상태일 경우에 상기한 흡기밸브가 닫히도록 제어하는 제어부; 로 구성되는 것을 특징으로 한다.A control unit for controlling the intake valve to close when the engine state is suddenly decelerated by the results measured by the RPM sensor and the throttle valve opening amount sensor; Characterized in that consists of.
도 1은 본 발명에 의한 CNG 엔진의 흡기계를 도시한 구성도.1 is a block diagram showing an intake system of a CNG engine according to the present invention.
도 2는 종래의 기술을 설명하기 위한 도면.2 is a view for explaining a conventional technology.
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
10 : 엔진 11 : 흡기라인10 engine 11: intake line
12 : 배기라인 13 : 스로틀바디12 exhaust line 13 throttle body
14 : 스로틀밸브 15 : 에어클리너14: Throttle Valve 15: Air Cleaner
21 : 흡기밸브 22 : 배기밸브21: intake valve 22: exhaust valve
23,24 : 액츄에이터 25 : 배기 브레이크 스위치23,24: actuator 25: exhaust brake switch
26 : ECU 30 : 제어부26: ECU 30: control unit
31 : 릴레이1 32 : 릴레이231: Relay 1 32: Relay 2
33 : RPM센서 34 : 스로틀밸브 개도량센서33: RPM sensor 34: Throttle valve opening amount sensor
이하, 본 발명의 구성에 따른 바람직한 실시예를 첨부한 도면과 함께 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with the accompanying drawings.
도 1은 본 발명에 의한 CNG 엔진의 흡기계를 도시한 구성도로서, 도면 중에 표시되는 도면부호 30은 본 발명에 의한 장치를 제어하는 제어부를 지시하는 것이며, CNG 엔진의 구성과 관련한 일부의 도면은 종래기술의 설명에서 사용된 부호가 그대로 인용된다.BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing an intake system of a CNG engine according to the present invention, wherein reference numeral 30 shown in the drawing indicates a control unit for controlling a device according to the present invention, and a part of the drawings related to the configuration of the CNG engine. Is used as it is in the description of the prior art.
종래와 같이 엔진(10)의 양측으로는 각각 흡기라인(11)과 배기라인(12)이 형성되는데, 배기가스의 배기압을 이용하여 흡기를 가압하기 위한 터보차저(16)와, 터보차저(16)에서 가압되어 온도가 상승된 흡기를 냉각하기 위한 인터쿨러(17)와, 흡입공기의 양을 조정하는 스로틀밸브(14)가 내장된 스로틀바디(14) 등이 흡기라인(11)에 구성된다.As in the related art, intake lines 11 and exhaust lines 12 are formed at both sides of the engine 10, respectively, and a turbocharger 16 and a turbocharger for pressurizing the intake air using the exhaust pressure of the exhaust gas. The intake line 11 includes an intercooler 17 for cooling the intake air, which is pressurized by 16, and a throttle body 14 having a throttle valve 14 for adjusting the amount of intake air. .
그리고 상기한 흡기라인(11)의 도중에는 흡기의 통과량을 조절하기 위한 흡기밸브(21)가 형성되고, 배기라인(12)의 도중에는 배기가스의 통과량을 조절하기 위한 배기밸브(22)가 도면에서와 같이 형성된다. 한편, 본 발명에 의한 흡기밸브(21)와 배기밸브(22)는 종래 기술에서와는 달리 각각의 액츄에이터(23,24)가 별도의 릴레이에 의해서 개폐가 제어될 수 있도록 구성된다. 즉, 에어탱크(28)로부터 전달되는 공압이 흡기밸브(21)와 배기밸브(22)에 각각 전달되도록 하기 위해서 흡기밸브(21) 및 배기밸브(22)의 액츄에이터(23)에는 별도의 릴레이1(31)과 릴레이2(32)가 구성된다.In the middle of the intake line 11, an intake valve 21 for adjusting the passage amount of intake air is formed, and an exhaust valve 22 for adjusting the passage amount of exhaust gas is shown in the middle of the exhaust line 12. It is formed as in On the other hand, the intake valve 21 and the exhaust valve 22 according to the present invention, unlike the prior art is configured so that each actuator 23, 24 can be opened and closed by a separate relay. That is, in order for the pneumatic pressure transmitted from the air tank 28 to be delivered to the intake valve 21 and the exhaust valve 22, the relay 23 is separately provided to the actuator 23 of the intake valve 21 and the exhaust valve 22. 31 and relay 2 32 are configured.
특히, 상기한 릴레이1(31)은 종래와 같이 운전자가 배기 브레이크 스위치(25)를 조작하였을 경우에 작동될 수 있도록 ECU(26)에 연결되고, 후설할 제어부(30)에도 연결된다. 한편, 상기 릴레이2(32)는 ECU(26)를 통해 배기 브레이크 스위치(25)와 연결된다.In particular, the relay 1 31 is connected to the ECU 26 so that the relay 1 31 can be operated when the driver operates the exhaust brake switch 25 as in the related art, and is also connected to the controller 30 to be set up later. Meanwhile, the relay 2 32 is connected to the exhaust brake switch 25 through the ECU 26.
그리고 상기한 제어부(30)에는 엔진의 회전수를 측정하는 RPM센서(33)가 연결되고, 스로틀밸브(14)의 개도량을 측정하는 스로틀밸브 개도량센서(34)와도 연결된다. 즉, 상기한 RPM센서(33) 및 스로틀밸브 개도량센서(34)에서 측정되는 측정값으로 엔진의 운전상태를 판단하게 된다. 이와 같이 상기한 제어부(30)에서 엔진의 운전상태가 판단되어, 그 운전상태가 고속주행 중 급감속하는 상태가 되면 상기한 제어부(30)에서는 상기 릴레이1(31)에 신호를 보내 흡기밸브(21)의 액츄에이터(23)가 공압에 의해 작동되도록 구성된다.In addition, the controller 30 is connected to the RPM sensor 33 for measuring the rotational speed of the engine, it is also connected to the throttle valve opening amount sensor 34 for measuring the opening amount of the throttle valve (14). That is, the operating state of the engine is determined by the measured values measured by the RPM sensor 33 and the throttle valve opening amount sensor 34. As described above, when the driving state of the engine is determined by the controller 30 and the driving state is rapidly decelerated during high-speed driving, the controller 30 sends a signal to the relay 1 31 to intake valve 21. Actuator 23 is configured to be operated by pneumatic pressure.
이상과 같이 구성되는 본 발명의 작동을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.
본 발명에 의해 형성된 엔진(10)이 탑재된 CNG 상용차량이 고속으로 주행하다가 운전자의 의도에 의해서 엑셀페달에서 발을 떼게 되면, 상기한 엑셀페달의 조작력에 의해서 상기한 스로틀밸브(14)는 닫히게 된다. 이때 RPM센서(33)에서는 계속해서 차량 엔진의 회전수가 체크되고 있는데 이때 엔진의 회전수가 급격히 감소하게 되면, 상기한 제어부(30)에서는 차량의 속도를 급감속해야 하는 상태로 파악하여 상기한 릴레이1(31)에 신호를 보내 흡기밸브(21)의 액츄에이터(23)에 공압이 가해지도록 한다.When the CNG commercial vehicle equipped with the engine 10 formed by the present invention is driven at a high speed and is released from the accelerator pedal by the driver's intention, the throttle valve 14 is closed by the operation force of the accelerator pedal. do. At this time, the rotation speed of the vehicle engine is continuously checked by the RPM sensor 33. When the rotation speed of the engine decreases rapidly, the controller 30 determines that the speed of the vehicle is to be rapidly reduced and the relay 1 ( 31) to send a pneumatic pressure to the actuator 23 of the intake valve (21).
그러면 상기한 흡기밸브(21)는 액츄에이터(23)에 전달되는 공압에 의해서 회전되어 흡입라인(11)의 도중을 차단하게 된다.Then, the intake valve 21 is rotated by the pneumatic pressure transmitted to the actuator 23 to block the middle of the suction line (11).
그리고 운전자가 배기 브레이크 스위치(25)를 온하여 배기 브레이크가 작동되더라도 상기한 흡기밸브(21)가 먼저 닫히게 되므로서 종래기술의 문제로 지적되었던 흡기밸브(21)로의 흡기역류에 의한 소음이 방지되어진다.In addition, even if the driver turns on the exhaust brake switch 25 and the exhaust brake is operated, the intake valve 21 is closed first, thereby preventing noise caused by the intake backflow to the intake valve 21, which has been pointed out as a problem of the prior art. Lose.
한편, 운전자의 배기 브레이크 스위치(25)의 작동에 의해 흡기밸브(21) 및 배기밸브(22)가 동시에 작동될 수 있도록 구성되므로서 종래와 같은 배기 브레이크의 작동은 그대로 이루어진다. 이 경우에 상기한 흡기밸브(21) 및 배기밸브(22)는 각각 릴레이1(31)과 릴레이2(32)에 의해서 액츄에이터(23,24)가 제어된다.On the other hand, since the intake valve 21 and the exhaust valve 22 can be operated at the same time by the operation of the driver's exhaust brake switch 25, the conventional operation of the exhaust brake is performed as it is. In this case, the actuators 23 and 24 are controlled in the intake valve 21 and the exhaust valve 22 by the relay 1 31 and the relay 2 32, respectively.
이상과 같이 구성되는 본 발명은 CNG 상용차량에서 고속으로 주행하던 도중에 갑자기 속도를 줄이게 되는 상황이 발생되었을 경우에, RPM센서 및 스로틀밸브 개도량센서에 의해 측정된 값에 의해서 운전상태를 급감속하는 상태로 파악하고 자동으로 흡기밸브를 닫아주게 되므로서, 배기 브레이크 작동시에 흡기의 역류에 의한 흡기밸브와의 부딪침으로 인한 소음이 방지되는 커다란 장점이 있는 것이다.The present invention constituted as described above is a state in which the operation state is suddenly decelerated by the value measured by the RPM sensor and the throttle valve opening amount sensor when a situation of suddenly reducing the speed occurs while driving at high speed in a CNG commercial vehicle. Since the intake valve is automatically closed, it is a great advantage to prevent noise caused by a collision with the intake valve due to the inflow of the intake back during the operation of the exhaust brake.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0035197A KR100435970B1 (en) | 2002-06-24 | 2002-06-24 | Ruduction apparatus of intake noise in CNG Engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0035197A KR100435970B1 (en) | 2002-06-24 | 2002-06-24 | Ruduction apparatus of intake noise in CNG Engine |
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| Publication Number | Publication Date |
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| KR20040000073A KR20040000073A (en) | 2004-01-03 |
| KR100435970B1 true KR100435970B1 (en) | 2004-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2002-0035197A KR100435970B1 (en) | 2002-06-24 | 2002-06-24 | Ruduction apparatus of intake noise in CNG Engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4866944B2 (en) * | 2009-08-05 | 2012-02-01 | 三井造船株式会社 | Reciprocating engine speed calculating device and reciprocating engine control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103083A (en) * | 1996-09-27 | 1998-04-21 | Hino Motors Ltd | Exhaust braking device of gas engine |
| KR19980048556U (en) * | 1996-12-30 | 1998-09-25 | 박병재 | Optional cylinder actuator for low speed and low load of V-type 6 cylinder engine |
| JPH11218035A (en) * | 1998-02-02 | 1999-08-10 | Toyota Motor Corp | Internal combustion engine |
| JPH11264335A (en) * | 1998-03-18 | 1999-09-28 | Nippon Soken Inc | Throttle valve control system for internal combustion engine |
| JPH11351030A (en) * | 1998-06-11 | 1999-12-21 | Fuji Heavy Ind Ltd | Internal combustion engine with supercharger |
-
2002
- 2002-06-24 KR KR10-2002-0035197A patent/KR100435970B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10103083A (en) * | 1996-09-27 | 1998-04-21 | Hino Motors Ltd | Exhaust braking device of gas engine |
| KR19980048556U (en) * | 1996-12-30 | 1998-09-25 | 박병재 | Optional cylinder actuator for low speed and low load of V-type 6 cylinder engine |
| JPH11218035A (en) * | 1998-02-02 | 1999-08-10 | Toyota Motor Corp | Internal combustion engine |
| JPH11264335A (en) * | 1998-03-18 | 1999-09-28 | Nippon Soken Inc | Throttle valve control system for internal combustion engine |
| JPH11351030A (en) * | 1998-06-11 | 1999-12-21 | Fuji Heavy Ind Ltd | Internal combustion engine with supercharger |
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