KR20010086517A - Lpg single point injection system - Google Patents

Lpg single point injection system Download PDF

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Publication number
KR20010086517A
KR20010086517A KR1020000010441A KR20000010441A KR20010086517A KR 20010086517 A KR20010086517 A KR 20010086517A KR 1020000010441 A KR1020000010441 A KR 1020000010441A KR 20000010441 A KR20000010441 A KR 20000010441A KR 20010086517 A KR20010086517 A KR 20010086517A
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South Korea
Prior art keywords
lpg
single point
injection system
fuel
duty solenoid
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KR1020000010441A
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Korean (ko)
Inventor
황혁동
Original Assignee
박종섭
주식회사 하이닉스반도체
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Priority to KR1020000010441A priority Critical patent/KR20010086517A/en
Publication of KR20010086517A publication Critical patent/KR20010086517A/en

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

PURPOSE: A single point LPG(Liquefied Petroleum Gas) injection system is provided to improve fuel efficiency and engine output by directly injecting fuel to a surge tank without a mixer. CONSTITUTION: A single point LPG injection system comprises: a first gasifying chamber(3) receiving fuel from a bombe; a surge tank(5) receiving the LPG supplied from the first gasifying chamber via a PWM(Pulse Width Modulation) duty solenoid(7); and an ECU(Electronic Control Unit)(11) operating the output value of a MAP(Manifold Absolute Pressure) sensor(9) measuring the pressure of an intake manifold for the control of the duty solenoid with engine RPM(Revolutions Per Minute). The ECU controls the duty solenoid by 50msec(20Hz) by PWM method. Herein, precision degree of control is improved compared to a mechanical method. Therefore, fuel efficiency and engine output are improved.

Description

엘피지싱글 포인트 인젝션 시스템 { LPG SINGLE POINT INJECTION SYSTEM }LPG SINGLE POINT INJECTION SYSTEM}

본 발명은 LPG싱글 포인트 인젝션 시스템에 관한 것으로서, 보다 상세히는 LPG를 원료로서 사용하는 차량에서 믹서를 사용하지 않고 서지 탱크에 연료를 직접 분사(싱글 포인트 방식)하여 연비와 엔진 출력을 향상시키기 위한 LPG싱글 포인트 인젝션 시스템에 관한 것이다.The present invention relates to an LPG single point injection system, and more particularly, to improve fuel efficiency and engine output by directly injecting fuel into a surge tank (single point method) without using a mixer in a vehicle using LPG as a raw material. A single point injection system.

종래의 경우에는 봄베에서 송출된 LPG가 기화기 1차실에서 1차 감압(0.3kg/㎠)되고, 2차실에서 대기압 수준으로 감압된 후 믹서로 보내진다.In the conventional case, LPG sent from the bomber is first depressurized (0.3 kg / cm 2) in the vaporizer primary chamber, and decompressed to atmospheric pressure in the secondary chamber and then sent to the mixer.

믹서로 유입되는 연료량은 MAS(기계적으로 양을 조절 : 전체 연료의 80% 정도) 및 솔레노이드 밸브(ECU가 전자 제어)로 조절되며, 다시 서지 탱크로 유입되는 연료량은 벤츄리 부압(스로틀 개도와 서지 탱크로 흡입되는 공기의 유속에 따라 형성)에 의해 결정되므로 적정 혼합비 제어에 불리한 방식이 된다. 즉, 연비 및 출력측면에서 손실이 많게 되는 문제점이 있다.The amount of fuel flowing into the mixer is controlled by MAS (mechanically controlled volume: about 80% of the total fuel) and solenoid valve (ECU electronically controlled). Formed by the flow rate of the air sucked into the furnace, which is disadvantageous for proper mixing ratio control. That is, there is a problem in that a lot of losses in terms of fuel economy and output.

본 발명은 상술한 종래의 문제점을 극복하기 위한 것으로서, 본 발명의 목적은 최적의 혼합비인 이론 공연비를 맞추기 위하여 흡입 공기량의 변화에 상응한 연료량을 엔진전자제어장치(ECU)가 100% 제어하게 하여 기화기 1차실에서 송출되는 고압의 연료를 엔진 서지 탱크에 직접 분사하고, 이때 분사되는 연료량은 MAP센서에서 감지한 흡입공기량에 따라 계산, 적정 혼합비를 맞추는 LPG싱글 포인트 인젝션 시스템을 제공하는데 있다.The present invention is to overcome the above-described problems, the object of the present invention is to control the engine electronic control unit (ECU) 100% fuel amount corresponding to the change in the intake air amount in order to meet the theoretical air-fuel ratio which is the optimum mixing ratio The high-pressure fuel from the carburetor primary chamber is injected directly into the engine surge tank, and the amount of injected fuel is calculated according to the amount of intake air detected by the MAP sensor, to provide an LPG single point injection system that matches an appropriate mixing ratio.

상기 본 발명의 목적을 달성하기 위한 본 발명에 따른 LPG싱글 포인트 인젝션 시스템의 일예로써,As an example of the LPG single point injection system according to the present invention for achieving the object of the present invention,

붐베로부터 연료를 공급받는 하나의 기화기 1차실과,One carburetor primary compartment, fueled by a boombe,

스로틀 밸브(15)를 통하여 유입된 공기량과 상기 기화기 1차실로부터 공급된LPG 연료를 PWM방식의 듀티 솔레노이드를 통하여 공급받는 서지탱크와,A surge tank receiving the amount of air introduced through the throttle valve 15 and the LPG fuel supplied from the primary chamber of the carburetor through a duty solenoid of a PWM method;

상기 듀티 솔레노이드를 제어하도록 흡기 부압을 측정하는 MAP 센서의 출력값과 엔진회전수를 연산하는 ECU로 구성된다.It is composed of an ECU for calculating the output value of the MAP sensor and the engine speed to measure the intake negative pressure so as to control the duty solenoid.

도 1은 본 발명에 따른 LPG싱글 포인트 인젝션 시스템을 도시한 구성도1 is a block diagram showing an LPG single point injection system according to the present invention

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

3 : 기회기 1차실 5 : 서지 탱크3: Opportunity Primary Room 5: Surge Tank

7 : 듀티 솔레노이드 9 : MAP 센서7: Duty solenoid 9: MAP sensor

11 : ECU 13 : 엔진11: ECU 13: Engine

15 : 스로틀 밸브15: throttle valve

이하, 본 발명의 실시예를 첨부한 도면을 참조하여 설명하기로 한다.Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

도 1을 참조하면, 본 발명에 따른 LPG싱글 포인트 인젝션 시스템이 도시되어 있다. 본 발명에 따른 LPG싱글 포인트 인젝션 시스템은 하나의 기화기 1차실(3)를 구비한다. 상기 기화기(3)는 붐베로부터 연료를 공급받는다.1, an LPG single point injection system according to the present invention is shown. The LPG single point injection system according to the invention has one vaporizer primary compartment 3. The vaporizer 3 is supplied with fuel from the boom.

서지탱크(5)는 스로틀 밸브(15)를 통하여 유입된 공기량과 상기 기화기 1차실(3)로부터 공급된 LPG 연료를 PWM방식의 듀티 솔레노이드(7)를 통하여 공급받는다.The surge tank 5 receives the amount of air introduced through the throttle valve 15 and the LPG fuel supplied from the vaporizer primary chamber 3 through the duty solenoid 7 of the PWM method.

상기 듀티 솔레노이드(7)는 흡기 부압을 측정하는 MAP 센서(9)의 출력값과 엔진회전수를 ECU(11)에서 연산하여 그 듀티비를 책정하여 제어된다.The duty solenoid 7 controls the output value and engine speed of the MAP sensor 9 for measuring the intake negative pressure and calculates the duty ratio by the ECU 11.

상기와 같은 구성에 의해서 본 발명에 따른 LPG싱글 포인트 인젝션 시스템은 다음과 같이 작동된다.By the above configuration, the LPG single point injection system according to the present invention operates as follows.

ECU(11)는 흡기 부압을 측정하는 MAP 센서(9)의 출력값과 엔진회전수를 ECU(11)에서 연산하여, 듀티 솔레노이드(7)를 50msec(20 Hz)로 제어하며, Pulse Width Module로 제어한다.The ECU 11 calculates the output value of the MAP sensor 9 for measuring the intake negative pressure and the engine speed in the ECU 11 to control the duty solenoid 7 at 50 msec (20 Hz), and to control the pulse width module. do.

듀티의 계산은Calculation of duty

DUTY = MAP * GAIN * 〔 0.5 + interp(TBEFF, MAP, RPM)/256〕 으로 한다.DUTY = MAP * GAIN * [0.5 + interp (TBEFF, MAP, RPM) / 256].

여기서, MAP는 흡기 부압이고, RPM은 엔진회전수이며, GAIN은 스케일 요소이며, TBEFF는 기본 연료량이다. 계산값은 다음의 표와 같다.Here, MAP is intake negative pressure, RPM is engine speed, GAIN is scale factor, and TBEFF is basic fuel amount. The calculated values are shown in the following table.

이름name 범위range 결정값Decision value MAPMAP 00 - 25500-255 3.68 mbar3.68 mbar RPMRPM 00 - 25500-255 32 rpm32 rpm

이름name 범위range 결정갑Crystal box Pt. No.Pt. No. GAINGAIN 00 - 25500-255 1/2551/255 1One TBEFFTBEFF 00 - 25500-255 0.39%0.39% 17 * 1717 * 17

상술한 바와같이, 본 발명에 따른 LPG싱글 포인트 인젝션 시스템은 LPG 차량에서 연소에 필요한 연료 전량을 전자 제어함으로서, 종래의 기계적 방식에 비하여 제어 정밀도가 향상되어 연비 향상 및 출력 증대에 큰 효과를 가져옴과 동시에 연료 공급 시스템의 단순화로 제조 원가 절감에 효과가 있다.As described above, the LPG single point injection system according to the present invention electronically controls the amount of fuel required for combustion in the LPG vehicle, thereby improving the control accuracy compared to the conventional mechanical method, which has a great effect on improving fuel efficiency and output power. At the same time, the simplification of the fuel supply system is effective in reducing manufacturing costs.

이상에서 설명한 것은 본 발명에 따른 LPG싱글 포인트 인젝션 시스템을 실시하기 위한 하나의 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되지 않고, 이하의 특허청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자가라면 누구든지 다양한 변경 실시가 가능할 것이다.What has been described above is just one embodiment for implementing the LPG single point injection system according to the present invention, the present invention is not limited to the above-described embodiment, the gist of the invention claimed in the following claims Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

Claims (1)

붐베로부터 연료를 공급받는 하나의 기화기 1차실(3)과,One carburetor primary chamber (3) supplied with fuel from a boombe, 스로틀 밸브(15)를 통하여 유입된 공기량과 상기 기화기 1차실(3)로부터 공급된 LPG 연료를 PWM방식의 듀티 솔레노이드(7)를 통하여 공급받는 서지탱크(5)와,A surge tank 5 which receives the amount of air introduced through the throttle valve 15 and the LPG fuel supplied from the carburetor primary chamber 3 through the duty solenoid 7 of the PWM method; 상기 듀티 솔레노이드(7)를 제어하도록 흡기 부압을 측정하는 MAP 센서(9)의 출력값과 엔진회전수를 연산하는 ECU(11)ECU 11 for calculating the output value and engine speed of the MAP sensor 9 for measuring the intake negative pressure so as to control the duty solenoid 7 로 구성되는 것을 특징으로 하는 LPG싱글 포인트 인젝션 시스템.LPG single point injection system, characterized in that consisting of.
KR1020000010441A 2000-03-02 2000-03-02 Lpg single point injection system KR20010086517A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103857897A (en) * 2011-10-05 2014-06-11 西港能源有限公司 Module for managing mass flow and dampening pressure pulsations in a gaseous fuel supply line

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103857897A (en) * 2011-10-05 2014-06-11 西港能源有限公司 Module for managing mass flow and dampening pressure pulsations in a gaseous fuel supply line
US9429094B2 (en) 2011-10-05 2016-08-30 Westport Power Inc. Module for managing mass flow and dampening pressure pulsations in a gaseous fuel supply line

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