KR20050006754A - Knocking control apparatus and method in a gasoline engine - Google Patents

Knocking control apparatus and method in a gasoline engine Download PDF

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Publication number
KR20050006754A
KR20050006754A KR1020030046688A KR20030046688A KR20050006754A KR 20050006754 A KR20050006754 A KR 20050006754A KR 1020030046688 A KR1020030046688 A KR 1020030046688A KR 20030046688 A KR20030046688 A KR 20030046688A KR 20050006754 A KR20050006754 A KR 20050006754A
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engine
knocking
temperature
cylinder
pressure
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KR1020030046688A
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Korean (ko)
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KR100507203B1 (en
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조윤호
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현대자동차주식회사
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    • 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
    • F02P5/152—Digital data processing dependent on pinking
    • F02P5/1526—Digital data processing dependent on pinking with means for taking into account incorrect functioning of the pinking sensor or of the electrical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine

Abstract

PURPOSE: A knocking control device of a gasoline engine and a method thereof are provided to improve torque and output of the gasoline engine, and to reduce noise by delaying the ignition time and controlling knocking of the gasoline engine accurately. CONSTITUTION: A knocking control device of a gasoline engine comprises a cam sensor(10) outputting a TDC signal, a pressure sensor(20) detecting and outputting pressure of a cylinder(80), a thermocouple(30) detecting and outputting temperature of the cylinder, an engine rpm sensor(40) detecting and outputting rpm of the engine, an air flow sensor(50) detecting and outputting the load of the engine, and an engine control unit(70) deciding auto-ignition delay time corresponding to pressure and temperature of the cylinder with the TDC signal and knocking by comparing auto-ignition time with the critical value, calculating the ignition time compensation value according to auto-ignition delay time, engine rpm and engine load, and delaying ignition time corresponding to the compensation value.

Description

가솔린 엔진의 노킹 제어 장치 및 방법 {Knocking control apparatus and method in a gasoline engine}Knocking control apparatus and method in a gasoline engine

본 발명은 가솔린 엔진의 노킹 제어 장치 및 방법에 관한 것으로, 좀더 상세하게는 노킹센서의 출력신호를 처리하여 노킹 발생 여부를 판단하고 노킹 발생시 점화시기를 지각시켜서 노킹이 발생되는 것을 방지하는 가솔린 엔진의 노킹 제어장치 및 방법에 관한 것이다.The present invention relates to a knocking control device and method of a gasoline engine, and more particularly, to a process of output signal of a knocking sensor to determine whether knocking occurs and when the knocking occurs by ignition timing to prevent knocking of the gasoline engine. Knocking control apparatus and method.

일반적으로, 노킹이란 엔진 운전중 화염파가 연소실벽을 때리는 현상을 말한다. 즉, 엔진 운전중 연소실내에서 정상의 연소파가 진행됨에 따라 미연소 가스는 압축되고 온도가 상승되어 연소실 벽이 가열된다. 이때 미연소 가스가 자기 착화 온도에 도달하면 전체 미연소 가스가 동시에 격렬한 연소를 일으키게 되어 연소실 벽을 작은 해머로 두드리는 것과 같이 화염파가 연소실 벽을 때리게 되며, 이러한 현상을 노킹이라 한다.In general, knocking refers to a phenomenon in which a flame wave hits a combustion chamber wall during engine operation. That is, as the normal combustion wave progresses in the combustion chamber during engine operation, the unburned gas is compressed and the temperature is increased to heat the combustion chamber wall. At this time, when the unburned gas reaches the self-ignition temperature, the entire unburned gas simultaneously causes violent combustion, so that the flame waves hit the combustion chamber wall, such as knocking the combustion chamber wall with a small hammer, which is called knocking.

상기와 같은 노킹 현상은 엔진의 출력 및 내구성 등에 좋지 않은 영향을 미치게 되므로, 이와 같은 노킹 현상을 발생되는 것을 방지하기 위한 노킹 제어가 필요하게 된다.Since the knocking phenomenon may adversely affect the output and durability of the engine, knocking control for preventing the knocking phenomenon from occurring is required.

통상의 노킹 제어는 엔진의 실린더블록에 장착된 노킹센서를 이용하는데, 상기 노킹센서에서 출력되는 진동신호를 엔진제어유니트에서 특정 방식으로 처리하여 노킹 발생 여부를 판단하고 이를 바탕으로 점화시기를 조절함으로써 노킹이 발생된는 것을 방지하고 있다.Normal knocking control uses a knocking sensor mounted on a cylinder block of an engine. The vibration signal output from the knocking sensor is processed in a specific manner by an engine control unit to determine whether knocking occurs and to adjust the ignition timing based on the knocking sensor. Knocking is prevented from occurring.

그러나, 종래의 노킹 제어 방법은, 노킹이 발생하면 미리 맵핑된 점화시기 지각맵에 의해 노킹강도에 따라 점화시기를 지각시킴으로써 정밀하지 못한 노킹 제어를 하게 되어 엔진의 토크 및 출력 감소를 수반하게 되는 문제점이 있었다.However, in the conventional knocking control method, when knocking occurs, inaccurate knocking control is performed by delaying the ignition timing according to the knocking intensity by a pre-mapped ignition timing perceptual map, which leads to reduction of torque and output of the engine. There was this.

이에, 본 발명은 상기한 바와 같은 과제를 해소하기 위해 고안된 것으로, 자발화지연시간을 바탕으로 점화시기를 지각시켜서 가솔린 엔진을 보다 정밀하게 노킹 제어함에 따라 가솔린 엔진의 토크 및 출력을 향상시킬 수 있을 뿐만 아니라 엔진의 정숙성을 향상시켜서 쾌적한 운전환경을 조성할 수 있는 가솔린 엔진의 노킹 제어 장치 및 방법을 제공하는데 그 목적이 있다.Accordingly, the present invention is designed to solve the above problems, it is possible to improve the torque and output of the gasoline engine by controlling the knocking of the gasoline engine more precisely by retarding the ignition timing based on the self-ignition delay time. In addition, the object of the present invention is to provide a knocking control device and method for a gasoline engine that can improve the quietness of the engine to create a comfortable driving environment.

상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 가솔린 엔진의 노킹 제어 장치는, TDC신호를 출력하는 캠센서와; 실린더내의 압력을 감지하여 출력하는 압력센서와; 실린더내의 온도를 감지하여 출력하는 고온열전쌍과; 엔진알피엠을 감지하여 출력하는 엔진알피엠센서와; 엔진부하를 감지하여 출력하는 공기량센서와; 상기 TDC신호를 이용하여 감지된 실린더내의 압력과 온도에 따라 자발화지연시간을 결정한 다음, 이 자발화지연시간과 임계값을 비교하여 노킹 발생 여부를 결정하여 노킹 발생시에는 상기 자발화지연시간과 엔진알피엠 및 엔진부하를 이용하여 점화시기 보정량을 산출하고, 이 보정량에 따라 점화시기를 지각시키는 엔진제어유니트를 포함하여 구성된 것을 특징으로 한다.The knocking control device of a gasoline engine according to the present invention for achieving the above object comprises a cam sensor for outputting a TDC signal; A pressure sensor for sensing and outputting a pressure in the cylinder; A high temperature thermocouple for sensing and outputting a temperature in the cylinder; An engine-RPM sensor for sensing and outputting an engine-RPM; An air mass sensor for sensing and outputting an engine load; The autonomous delay time is determined according to the detected pressure and temperature in the cylinder using the TDC signal, and then the autonomous delay time is compared with a threshold value to determine whether knocking occurs. And an engine control unit for calculating the ignition timing correction amount using the ALPM and the engine load, and recognizing the ignition timing according to the correction amount.

상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 가솔린 엔진의 노킹 제어 방법은, 압축말기의 실린더내 압력(P) 및 온도(T)를 측정하는 단계와; 상기 압력 및 온도를 이용하여 자발화지연시간을 산출하는 단계와; 이 자발화지연시간과 임계값을 비교하여 노킹 발생 여부를 판단하는 단계와; 노킹 발생시에 상기 자발화지연시간과 엔진알피엠 및 엔진부하를 이용하여 점화시기 보정량을 산출하는 단계와; 상기 보정량에 따라 점화시기를 지각시키는 단계를 포함하여 구성된 것을 특징으로 한다.The knocking control method of the gasoline engine according to the present invention for achieving the above object comprises the steps of measuring the pressure (P) and the temperature (T) in the cylinder of the end of the compression; Calculating a self-ignition delay time using the pressure and temperature; Determining whether knocking has occurred by comparing the spontaneous delay time and a threshold value; Calculating an ignition timing correction amount by using the spontaneous combustion delay time, engine RPM and engine load when knocking occurs; And retarding the ignition timing according to the correction amount.

도 1은 본 발명에 따른 가솔린 엔진의 노킹 제어 장치의 구성도,1 is a configuration diagram of a knocking control device of a gasoline engine according to the present invention;

도 2는 본 발명에 따른 가솔린 엔진의 노킹 제어 방법의 순서도이다.2 is a flowchart of a knocking control method of a gasoline engine according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 캠센서 20 : 압력센서10: cam sensor 20: pressure sensor

30 : 고온열전쌍 40 : 엔진알피엠센서30: high temperature thermocouple 40: engine RPM sensor

50 : 공기량센서 60 : 연료옥탄가입력부50: air flow sensor 60: fuel octane number input unit

70 : 엔진제어유니트 80 : 실린더70: engine control unit 80: cylinder

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명에 따른 가솔린 엔진의 노킹 제어 장치의 구성도이다. 상기 도 1에서, 캠센서(10)는 TDC신호를 엔진제어유니트(70)로 출력하고, 압력센서(20)는 플러쉬 마운트 형태(Flush Mount Type)로 엔진의 실린더 헤드 연소실면에 장착되어 실린더(80)내의 압력을 감지하여 엔진제어유니트(70)로 출력하며, 고온열전쌍(30)은 플러쉬 마운트 형태(Flush Mount Type)로 엔진의 실린더 헤드 연소실면에 장착되어 실린더(80)내의 온도를 감지하여 엔진제어유니트(70)로 출력한다.1 is a configuration diagram of a knocking control device of a gasoline engine according to the present invention. In FIG. 1, the cam sensor 10 outputs a TDC signal to the engine control unit 70, and the pressure sensor 20 is mounted on the cylinder head combustion chamber surface of the engine in a flush mount type and mounted on a cylinder ( 80 senses the pressure and outputs it to the engine control unit 70. The high temperature thermocouple 30 is mounted on the cylinder head combustion chamber surface in a flush mount type to sense the temperature in the cylinder 80. Output to the engine control unit 70.

또한, 엔진알피엠센서(40)는 엔진알피엠을 감지하여 엔진제어유니트(70)로 출력하고, 공기량센서(50)는 엔진부하를 감지하여 엔진제어유니트(70)로 출력하며, 연료옥탄가입력부(60)는 연료옥탄가를 엔진제어유니트(70)로 입력하는 것으로 상기 연료옥탄가는 각 개발사양에서 요구되는 값이 입력된다.In addition, the engine RMP sensor 40 detects the engine RMP and outputs it to the engine control unit 70, the air volume sensor 50 detects the engine load and outputs it to the engine control unit 70, the fuel octane number input unit 60 ) Inputs the fuel octane number to the engine control unit 70. The fuel octane number is input to a value required for each development specification.

상기 엔진제어유니트(70)는 상기 캠센서(10)에서 입력된 TDC신호를 이용하여 감지된 실린더내의 압력과 온도에 따라 자발화지연시간(t_aig)을 결정한 다음, 이 자발화지연시간(t_aig)과 임계값(t_aig_TH)을 비교하여 노킹 발생 여부를 결정하여 노킹 발생시에는 상기 자발화지연시간(t_aig)과 엔진알피엠(rpm) 및 엔진부하(load)를 이용하여 점화시기 보정량(t_iga)을 산출하고, 이 보정량(t_iga)에 따라 점화시기를 지각키도록 되어 있다.The engine control unit 70 determines the spontaneous delay time t_aig according to the detected pressure and temperature in the cylinder using the TDC signal input from the cam sensor 10, and then the spontaneous delay time t_aig. Compares the threshold value (t_aig_TH) and determines whether knocking occurs. When knocking occurs, the ignition timing correction amount (t_iga) is calculated using the spontaneous delay time (t_aig), engine RPM (rpm), and engine load (load). Therefore, the ignition timing is delayed according to this correction amount t_iga.

상기한 바와 같이 구성된 본 발명에 따른 가솔린 엔진의 노킹 제어 장치 및 방법의 작용 및 효과를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.The operation and effects of the knocking control device and method of the gasoline engine according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 가솔린 엔진의 노킹 제어 방법의 순서도이다.2 is a flowchart of a knocking control method of a gasoline engine according to the present invention.

상기 도 2의 단계(S1)에서는 엔진제어유니트(70)가 캠센서(10)에서 출력되는 TDC신호를 이용하여 압축초기(흡기밸브가 닫히는 시기)인지를 판단하여 압축초기라고 판단하면 단계(S2)를 수행한다.In the step S1 of FIG. 2, if the engine control unit 70 determines whether it is a compression initial stage (time for closing the intake valve) by using the TDC signal output from the cam sensor 10 and determines that it is a compression initial stage (S2). ).

상기 단계(S2)에서는, 압력센서(20)와 고온열전쌍(30)이 압축초기의 실린더내 순간 압력(Pi)과 순간 온도(Ti)를 각각 측정하여 엔진제어유니트(70)로 입력한다.In the step S2, the pressure sensor 20 and the high-temperature thermocouple 30 measure the instantaneous pressure Pi and the instantaneous temperature Ti of the initial stage of compression, respectively, and input them to the engine control unit 70.

이어서, 단계(S3)에서는 엔진제어유니트(70)가 상기 압축초기의 실린더내 순간 압력(Pi) 및 온도(Ti)로부터 압축말기의 실린더내 압력(P) 및 온도(T)를 산출한다.Subsequently, in step S3, the engine control unit 70 calculates the in-cylinder pressure P and the temperature T at the end of the compression from the in-cylinder instantaneous pressure Pi and the temperature Ti of the initial compression.

즉, 압축말기 압력(P)와 압축말기온도(T)는 압축행정을 비열비(specific heat ratio) 1.3의 폴리트로픽과정(Polytropic Process)으로 모사하고, 측정된 압축초기 압력(Pi)과 압축초기 온도(Ti)를 이용하여 다음과 같은 수학식1, 2로 구할 수 있다.That is, the end pressure P and the end temperature T simulate the compression stroke as a polytropic process with a specific heat ratio of 1.3, and the measured initial compression pressure Pi and initial compression Using the temperature Ti can be obtained by the following equations (1) and (2).

P = Pi ×r1.3 P = Pi × r 1.3

T = Ti ×r0.3 T = Ti × r 0.3

상기 수학식1, 2에서 r은 엔진의 압축비이다.In Equations 1 and 2, r is the compression ratio of the engine.

이어서, 단계(S4)에서는 엔진제어유니트(70)가 자발화지연시간(t_aig)을 산출하는데, 상기 자발화지연시간은 압축행정이 완료된 시점부터 자발화가 발생하는 시점까지의 시간을 의미한다.Subsequently, in step S4, the engine control unit 70 calculates the spontaneous delay time t_aig. The spontaneous delay time means the time from when the compression stroke is completed to when the spontaneous combustion occurs.

상기 자발화지연시간(t_aig)을 다음의 수학식3에 의해 계산된다.The spontaneous delay time t_aig is calculated by the following equation.

여기서, T는 압축말기의 실린더내 온도이고, P는 압축말기의 실린더내 압력이고, ON은 연료 옥탄가이다.Where T is the in-cylinder temperature at the end of compression, P is the in-cylinder pressure at the end of compression, and ON is the fuel octane number.

이어서, 단계(S5)에서는 엔진제어유니트(70)가 상기와 같이 계산된 자발화지연시간(t_aig)과 임계값(t_aig_TH)을 비교하여 노킹 발생 여부를 판단하여 노킹이 발생되었으면 단계(S6)를 수행한다.Subsequently, in step S5, the engine control unit 70 compares the self-ignition delay time t_aig and the threshold value t_aig_TH calculated as described above to determine whether knocking has occurred and if step knocking has occurred, step S6 is performed. Perform.

즉, 하기의 수학식 4로부터 알 수 있는 바와 같이, 미리 맵핑된 테이블을 이용하여 압축말기의 실린더내 압력(P) 및 온도(T)에 따라 임계값(t_aig_TH)을 결정하고, 이 임계값(t_aig_TH)과 상기 자발화지연시간(t_aig)을 비교하여 자발화지연시간이 임계값 보다 작으면 노킹이 발생된 것으로 판단한다.That is, as can be seen from Equation 4 below, the threshold value t_aig_TH is determined according to the in-cylinder pressure P and the temperature T of the end of the compression using a premapped table, and the threshold value ( t_aig_TH) and the spontaneous delay time (t_aig) is compared to determine that knocking occurs when the spontaneous delay time is less than the threshold value.

t_aig_TH = map (P, T)t_aig_TH = map (P, T)

그리고, 단계(S6)에서는 엔진제어유니트(70)가 상기와 같이 계산된 자발화지연시간(t_aig)과 엔진알피엠센서(40)와 공기량센서(50)에 의해 감지된 엔진알피엠(rpm) 및 엔진부하(load)를 이용하여 점화시기 보정량(t_iga)을 산출한다.In operation S6, the engine control unit 70 detects the engine ignition delay time t_aig calculated as described above, the engine RPM sensor 40, and the air amount sensor 50. The ignition timing correction amount t_iga is calculated using a load.

이때, 상기 점화시기 보정량(t_iga)은 다음의 수학식 5, 6에 도시된 바와 같이, 엔진알피엠(rpm) 및 엔진부하(load)에 따라 미리 맵핑된 테이블을 통해 결정되는 변수(t_spk)에서 상기 자발화지연시간(t_aig)을 빼서 산출한다.At this time, the ignition timing correction amount (t_iga) is the variable (t_spk) determined through a table mapped in advance according to the engine RPM (rpm) and the engine load (load), as shown in Equation 5, 6 It is calculated by subtracting the spontaneous delay time (t_aig).

t_iga = t_spk - t_aigt_iga = t_spk-t_aig

t_spk = map (rpm, load)t_spk = map (rpm, load)

이어서, 단계(S7)에서는 엔진제어유니트(70)가 상기와 같이 구해진 점화시기 보정량(t_iga) 만큼 지각시켜서 노킹제어한다.Subsequently, in step S7, the engine control unit 70 perceives as much as the ignition timing correction amount t_iga obtained as described above and performs knocking control.

이상에서 설명한 바와 같이 본 발명에 따르면, 자발화지연시간을 바탕으로 점화시기를 지각시켜서 가솔린 엔진을 보다 정밀하게 노킹 제어함에 따라 가솔린 엔진의 토크 및 출력을 향상시킬 수 있을 뿐만 아니라 엔진의 정숙성을 향상시켜서 쾌적한 운전환경을 조성할 수 있는 효과가 있다.As described above, according to the present invention, the torque and output of the gasoline engine can be improved as well as the quietness of the engine can be improved by knocking the gasoline engine more precisely by controlling the ignition timing based on the self-ignition delay time. It is effective to create a comfortable driving environment.

Claims (6)

TDC신호를 출력하는 캠센서와; 실린더내의 압력을 감지하여 출력하는 압력센서와; 실린더내의 온도를 감지하여 출력하는 고온열전쌍과; 엔진알피엠을 감지하여 출력하는 엔진알피엠센서와; 엔진부하를 감지하여 출력하는 공기량센서와; 상기 TDC신호를 이용하여 감지된 실린더내의 압력과 온도에 따라 자발화지연시간을 결정한 다음, 이 자발화지연시간과 임계값을 비교하여 노킹 발생 여부를 결정하여 노킹 발생시에는 상기 자발화지연시간과 엔진알피엠 및 엔진부하를 이용하여 점화시기 보정량을 산출하고, 이 보정량에 따라 점화시기를 지각시키는 엔진제어유니트를 포함하여 구성된 것을 특징으로 하는 가솔린 엔진의 노킹 제어 장치.A cam sensor for outputting a TDC signal; A pressure sensor for sensing and outputting a pressure in the cylinder; A high temperature thermocouple for sensing and outputting a temperature in the cylinder; An engine-RPM sensor for sensing and outputting an engine-RPM; An air mass sensor for sensing and outputting an engine load; The autonomous delay time is determined according to the detected pressure and temperature in the cylinder using the TDC signal, and then the autonomous delay time is compared with a threshold value to determine whether knocking occurs. A knocking control device for a gasoline engine, comprising an engine control unit for calculating an ignition timing correction amount using an ALPM and an engine load, and recognizing the ignition timing according to the correction amount. 압축말기의 실린더내 압력(P) 및 온도(T)를 측정하는 단계와; 상기 압력 및 온도를 이용하여 자발화지연시간을 산출하는 단계와; 이 자발화지연시간과 임계값을 비교하여 노킹 발생 여부를 판단하는 단계와; 노킹 발생시에 상기 자발화지연시간과 엔진알피엠 및 엔진부하를 이용하여 점화시기 보정량을 산출하는 단계와; 상기 보정량에 따라 점화시기를 지각시키는 단계를 포함하여 구성된 것을 특징으로 하는 가솔린 엔진의 노킹 제어 방법.Measuring in-cylinder pressure P and temperature T at the end of compression; Calculating a self-ignition delay time using the pressure and temperature; Determining whether knocking has occurred by comparing the spontaneous delay time and a threshold value; Calculating an ignition timing correction amount by using the spontaneous combustion delay time, engine RPM and engine load when knocking occurs; And controlling the ignition timing according to the correction amount. 제 2 항에 있어서, 상기 압축말기의 실린더내 압력(P) 및 온도(T)를 측정하는 단계는, 캠센서에서 출력되는 TDC신호를 이용하여 압축초기(흡기밸브가 닫히는시기)인지를 판단하는 단계와, 압축초기의 실린더내 순간 압력과 순간 온도를 측정하는 단계와; 상기 압축초기의 실린더내 순간 압력 및 온도로부터 압축말기의 실린더내 압력(P) 및 온도(T)를 산출하는 단계를 포함하여 구성된 것을 특징으로 하는 가솔린 엔진의 노킹 제어 방법.According to claim 2, The step of measuring the pressure (P) and the temperature (T) in the cylinder of the end of the compression, by using the TDC signal output from the cam sensor to determine whether it is the initial compression (intake valve closing time) Measuring the in-cylinder instantaneous pressure and the instantaneous temperature of the compression initial stage; And a step of calculating the in-cylinder pressure (P) and the temperature (T) of the end of compression from the instantaneous pressure and temperature of the initial stage of the compression. 제 2 항에 있어서, 상기 자발화지연시간(t_aig)은 다음의 수학식에 의해 산출하는 것을 특징으로 하는 가솔린 엔진의 노킹 제어 방법.3. The knocking control method of a gasoline engine according to claim 2, wherein the spontaneous delay time (t_aig) is calculated by the following equation. 여기서, T는 압축말기의 실린더내 온도이고, P는 압축말기의 실린더내 압력이고, ON은 연료 옥탄가이다.Where T is the in-cylinder temperature at the end of compression, P is the in-cylinder pressure at the end of compression, and ON is the fuel octane number. 제 2 항에 있어서, 상기 노킹 발생 여부를 판단하는 단계는, 미리 맵핑된 테이블을 이용하여 압축말기의 실린더내 압력(P) 및 온도(T)에 따라 임계값을 결정하고, 이 임계값과 상기 자발화지연시간을 비교하여 노킹 발생 여부를 판단하는 것을 특징으로 하는 가솔린 엔진의 노킹 제어 방법.The method of claim 2, wherein the determining of whether knocking occurs comprises determining a threshold value according to the in-cylinder pressure P and the temperature T of the end of the compression using a premapped table, and the threshold value and the threshold value. A knocking control method of a gasoline engine, characterized in that it is determined whether the knock occurs by comparing the spontaneous delay time. 제 2 항에 있어서, 상기 점화시기 보정량(t_iga)는 엔진알피엠 및 엔진부하에 따라 미리 맵핑된 테이블을 통해 결정되는 변수(t_spk)에서 상기 자발화지연시간(t_aig)을 빼서 산출하는 것을 특징으로 하는 가솔린 엔진의 노킹 제어 방법.The method of claim 2, wherein the ignition timing correction amount t_iga is calculated by subtracting the spontaneous delay time t_aig from a variable t_spk determined through a table mapped in advance according to engine RPM and engine load. How to control knocking of gasoline engines.
KR10-2003-0046688A 2003-07-10 2003-07-10 Knocking control apparatus and method in a gasoline engine KR100507203B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140053808A1 (en) * 2011-05-02 2014-02-27 Toyota Jidosha Kabushiki Kaisha Spark ignition type internal combustion engine
KR102246466B1 (en) * 2020-04-16 2021-04-30 서울대학교산학협력단 Method for predicting knocking occurrence of engine
CN113498451A (en) * 2019-03-04 2021-10-12 日立安斯泰莫株式会社 Control device for hybrid vehicle

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140053808A1 (en) * 2011-05-02 2014-02-27 Toyota Jidosha Kabushiki Kaisha Spark ignition type internal combustion engine
US9482163B2 (en) * 2011-05-02 2016-11-01 Toyota Jidosha Kabushiki Kaisha Spark ignition type internal combustion engine
CN113498451A (en) * 2019-03-04 2021-10-12 日立安斯泰莫株式会社 Control device for hybrid vehicle
CN113498451B (en) * 2019-03-04 2023-09-22 日立安斯泰莫株式会社 Control device for hybrid vehicle
KR102246466B1 (en) * 2020-04-16 2021-04-30 서울대학교산학협력단 Method for predicting knocking occurrence of engine
US11236691B2 (en) 2020-04-16 2022-02-01 Seoul National University R&Db Foundation Method of predicting occurrence of engine knocking

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