KR970027804A - Ignition Noise Reduction Circuit of Knock Signal - Google Patents

Ignition Noise Reduction Circuit of Knock Signal Download PDF

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Publication number
KR970027804A
KR970027804A KR1019950043948A KR19950043948A KR970027804A KR 970027804 A KR970027804 A KR 970027804A KR 1019950043948 A KR1019950043948 A KR 1019950043948A KR 19950043948 A KR19950043948 A KR 19950043948A KR 970027804 A KR970027804 A KR 970027804A
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KR
South Korea
Prior art keywords
signal
reference signal
knock
ignition
output
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Application number
KR1019950043948A
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Korean (ko)
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KR100302777B1 (en
Inventor
박경혁
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전성원
현대자동차 주식회사
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Priority to KR1019950043948A priority Critical patent/KR100302777B1/en
Publication of KR970027804A publication Critical patent/KR970027804A/en
Application granted granted Critical
Publication of KR100302777B1 publication Critical patent/KR100302777B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

이 발명은 전자제어엔진을 구비한 자동차에 적용되는 노크(Knock) 신호의 점화 노이즈(Ignition noise) 제거회로에 관한 것으로서, 노크 센서의 출력신호에 포함되어 있는 고주파 성분을 제거하기 위한 평활회로와; 상기 평활회로의 출력신호와 점화신호를 받아들여, 상기 점화신호로부터 감지되는 점화시작 직전의 상기 평활회로 출력신호를 출력단으로 유지시키는 신호유지부와; 상기 신호유지부에서 출력되는 신호의 상한치와 하한치를 기준신호로서 설정하는 기준신호 발생부와; 노크센서의 출력신호와 상기 기준신호 발생부의 기준신호를 비교하여 그 차이를 출력하는 비교연산부로 구성되어, 점화시작 직전의 노크 신호의 상한치와 하한치를 기준신호로 하여 노크 신호가 비교연산 되도록 함으로써 노크 신호에 포함되어 있는 점화 노이즈를 제거할 수 있으며, 노크 판정회로의 전단에 적용되어 노크 판정의 정확도를 높일 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition noise removing circuit of a knock signal applied to an automobile having an electronic control engine, comprising: a smoothing circuit for removing high frequency components included in an output signal of a knock sensor; A signal holding unit which receives the output signal and the ignition signal of the smoothing circuit and maintains the smoothing circuit output signal immediately before the ignition start detected from the ignition signal at an output end; A reference signal generator for setting an upper limit value and a lower limit value of a signal output from the signal holding part as a reference signal; Comprising a comparison operation unit for comparing the output signal of the knock sensor and the reference signal of the reference signal generator and outputs the difference, by knocking the knock signal is compared by using the upper and lower limits of the knock signal immediately before the start of ignition as a reference signal Ignition noise included in the signal can be eliminated, and applied to the front end of the knock determination circuit to increase the accuracy of knock determination.

Description

노크 신호의 점화 노이즈 제거회로Ignition Noise Reduction Circuit of Knock Signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 이 발명의 실시예에 따른 노크 신호의 점화 노이즈 제거회로의 구성 블록도이다.FIG. 1 is a block diagram of the ignition noise removing circuit of the knock signal according to the embodiment of the present invention.

Claims (4)

노크 센서의 출력신호에 포함되어 있는 고주파 성분을 제거하기 위한 평활회로와; 상기 평활회로의 출력신호와 점화신호를 받아들여, 상기 점화신호로부터 감지되는 점화시작 직전의 상기 평활회로 출력신호를 출력단으로 유지시키는 신호유지부와; 상기 신호유지부에서 출력되는 신호의 상한치와 하한치를 기준신호로서 설정하는 기준신호 발생부와; 노크센서의 출력신호와 상기 기준신호 발생부의 기준신호를 비교하여 그 차이를 출력하는 비교연산부를 포함하여 이루어지는 것을 특징으로 하는 노크신호의 점화 노이즈 제거회로.A smoothing circuit for removing high frequency components included in the output signal of the knock sensor; A signal holding unit which receives the output signal and the ignition signal of the smoothing circuit and maintains the smoothing circuit output signal immediately before the ignition start detected from the ignition signal at an output end; A reference signal generator for setting an upper limit value and a lower limit value of a signal output from the signal holding part as a reference signal; And a comparison operation unit which compares an output signal of the knock sensor with a reference signal of the reference signal generator and outputs a difference thereof. 제1항에 있어서, 상기한 기준신호 발생부는 상기 신호유지부 출력신호의 상한치를 검출하여 상한치 기준신호로서 제공하는 상한치 기준신호 발생부와; 상기 신호유지부 출력신호의 하한치를 검출하여 하한치 기준신호로서 제공하는 하한치 기준신호 발생부로 구성되는 것을 특징으로 하는 노크 신호의 점화 노이즈 제거회로.2. The apparatus of claim 1, wherein the reference signal generator comprises: an upper limit reference signal generator for detecting an upper limit of the signal holding unit output signal and providing the upper limit reference signal; And a lower limit reference signal generator for detecting a lower limit of the signal holding unit output signal and providing the lower limit reference signal as a lower limit reference signal. 제2항에 있어서, 상기한 비교연산부는 상기 상한치 기준신호 발생부의 신호를 노크신호와 비교하는 상한치 비교연산부와; 상기 하한치 기준신호 발생부의 신호를 노크신호와 비교하는 하한치 비교연산부로 구성되는 것을 특징으로 하는 노크 신호의 점화 노이즈 제거회로.3. The apparatus of claim 2, wherein the comparison operation unit comprises: an upper limit comparison operation unit which compares a signal of the upper limit reference signal generation unit with a knock signal; And a lower limit comparison operation unit for comparing the signal of the lower limit reference signal generator with the knock signal. 제3항에 있어서, 상기 상한치 비교연산부와 하한치 비교연산부의 출력신호를 입력받아, 두 신호를 합산한 후 그 결과를 노크 판정에 이용하도록 외부에 제공하는 합산부를 부가하여 포함하는 것을 특징으로 하는 노크신호의 점화 노이즈 제거회로.4. The knocking apparatus according to claim 3, further comprising a knocking unit which receives an output signal of the upper limit comparing and calculating unit and adds the two signals, and adds the sum signal to the outside to use the result for knock determination. Signal ignition noise cancellation circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950043948A 1995-11-27 1995-11-27 Circuit for erasing ignition noise of knock signal KR100302777B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950043948A KR100302777B1 (en) 1995-11-27 1995-11-27 Circuit for erasing ignition noise of knock signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950043948A KR100302777B1 (en) 1995-11-27 1995-11-27 Circuit for erasing ignition noise of knock signal

Publications (2)

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KR970027804A true KR970027804A (en) 1997-06-24
KR100302777B1 KR100302777B1 (en) 2001-11-22

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KR101168968B1 (en) * 2009-09-14 2012-07-26 순환엔지니어링 주식회사 Detecting and filtering method of random noise signal

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