Abstract:
본 발명은 직접 연소압력을 측정하지 않고 진동을 통하여 연소실의 최대압력을 추정하고 연료분사시기를 제어할 수 있는 디젤엔진의 연소 제어 방법에 관한 것이다. 본 발명에 따른 디젤엔진의 연소 제어 방법은, 엔진에서 발생하는 진동을 측정하는 진동측정단계(S120)와, 상기 진동측정단계(S120)에서 측정된 진동데이터에서 최대압력발생위치(LPP)가 예측되는 범위를 설정하는 측정영역설정단계(S130)와, 상기 측정영역설정단계(S130)에서 설정된 진동신호를 주파수응답함수로 변환하는 주파수변환단계(S140)와, 상기 주파수변환단계(S140)에서 변환된 주파수응답함수를 적산하는 주파수적산단계(S150)와, 상기 주파수적산단계(S150)에서 적산된 주파수응답함수에서 최대압력발생위치를 선정하는 LPP검출단계(S160)와, 검출된 LPP위치로 LPP 옵셋과 연소개시시기(SOC) 옵셋을 선정하는 추정값산출단계(S170)와, 상기 추정값산출단계(S170)에서 산출된 추정 LPP값과 추정 SOC값을 목표 LPP값과 목표 SOC값과 비교하여 에러를 산출하는 에러� �출단계(S180)와, 상기 에러산출단계(S180)에서 산출된 값을 이용하여 연소를 보정하여 제어하는 연소보정단계(S190)를 포함한다.
Abstract:
본 발명은 연료 분사 제어 장치 및 방법을 개시한다. 본 발명의 실시예에 따른 주 분사 및/또는 파일럿 분사로 엔진에 연료를 분사하는 연료 분사 제어 장치에 있어서, 상기 엔진의 운전 상태를 검출하는 센서부와 상기 엔진의 크랭크 각속도를 검출하는 크랭크 각속도 센서와 상기 엔진의 운전 상태에 따라 제어될 연료 분사 인자를 결정하고, 검출된 상기 크랭크의 각속도를 수신받아 최대 연소 압력 위치를 산출하고, 상기 산출된 최대 연소 압력 위치에 따라 상기 연료 분사 인자를 제어하는 제어부; 및 상기 연료 분사 인자에 따라 연료를 분사하는 인젝터를 포함한다.
Abstract:
PURPOSE: A method for controlling the combustion of a diesel engine is provided to estimate the peak pressure of a combustion chamber and control fuel injection timing through vibration without the direct measurement of combustion pressure. CONSTITUTION: A method for controlling the combustion of a diesel engine includes: a step (S120) of measuring vibration on the engine; a step (S130) of predetermining a range in which the location of the peak pressure (LPP) is predicted with measured data for the vibration; a step (S140) of converting a determined vibration signal into a frequency response function; a step (S150) of integrating the converted frequency response functions; a step (S160) of determining the LPP from the integrated frequency response functions; a step (S170) of determining the offset of the LPP and the offset of the start of combustion (SOC) to the detected LPP; and a step (S180) of calculating an error with comparing a calculated estimated LPP value and estimated SOC value with a target LPP value and a target SOC value. [Reference numerals] (AA) Start; (S110) Drive an engine; (S120) Measure an engine block vibration; (S130) Select a measurement window from a driving condition; (S140) Wavelet-convert the measured vibration into the selected window; (S150) Integrate the converted wavelet value; (S160) Detect the maximum generation position of the integrated wavelet value; (S170) Apply an offset of an LPP and an SOC from a detected location and presume the LPP and the SOC; (S180) ε_LPP = LPP_target - LPP_ presume ε_SOC = SOC_target-SOC_presume; (S191) Compensate fuel emission period; (S192) Compensate fuel emission quantity
Abstract:
PURPOSE: A fuel injection control device and a method thereof are provided to control fuel injecting factors efficiently. CONSTITUTION: A fuel injection control device comprises sensor units(10,30), a crank angular speed sensor(40), a control unit(50), and an injector(60). The sensor units detect an operation condition of an engine. The crank angular speed sensor detects a crank angular speed of the engine. The control unit determines fuel injecting factors to be controlled, calculates a position of maximum combustion pressure, and controls the fuel injecting factors according to the position of the maximum combustion pressure. The injector injects fuel according to the fuel injecting factors. [Reference numerals] (10) Throttle opening degree sensor; (30) Engine RPM sensor; (40) Crank angular speed sensor; (50) Control unit; (60) Injector
Abstract:
PURPOSE: A device for setting a mounting position of a vibration sensor of an inner combustion engine, a control method thereof, and a system for the same are provided to set a mounting position of the vibration sensor by measuring vibration and pressure and analyzing the same simultaneously on a real time basis, thereby reducing the number of processes and minimizing time required for setting an optimal mounting position. CONSTITUTION: A device for setting a mounting position of a vibration sensor comprises a data measuring unit(10) and a data calculation unit(30). The data measuring unit respectively measures vibration per each measurement position set in advance and pressure at a reference position set in advance when combusting the inner combustion engine. The data calculation unit calculates correlation indexes per each measurement positions by using measured pressure signals and vibration signals, thereby setting the mounting position of the vibration sensor based on the calculated correlation indexes. [Reference numerals] (12) Pressure measuring end; (14) Vibration measuring end; (30) Data calculation unit
Abstract:
An engine cover incorporated resonator for attenuating noise is provided to enhance appearance of an engine room and reduce booming noise of an engine. An engine cover incorporated resonator(100) comprises a lower plate(110) attached to top of an engine; an upper plate(120) placed on the lower plate; and a hole(130) penetrating the lower plate and the upper plate. The lower plate prevents booming noise of an engine inside an engine room. The inside of the upper plate remain empty in order to maintain sealing capacity. The noise from an engine enters through the hole of the resonator.
Abstract:
A method for decreasing burning noise though improving maximum pressure by multi point injection in a field of idle is provided to decrease maximum value for combustion pressure by performing multi point injection while dividing the number of injection into RPM of an engine. A method for decreasing burning noise though improving maximum pressure by multi point injection in a field of idle comprises the step of making difference in limited value for the number of injection according to RPM of a diesel engine by detecting the RPM when the diesel engine performs idle rotation and low speed-load rotation. The method further includes the steps of starting engine(S1), operating the engine(S2), and determining the RPM of the engine(S3). In the step of determining the RPM, when the RPM is less than 1000, pilot injection is performed at least three times(S4) and when the RPM is more than 1000, the pilot injection is performed twice(S5).
Abstract:
본 발명은 차량의 주행 중 팁아웃(tip-out, 감속)을 감지하는 단계와, 상기 팁아웃이 감지된 경우 팁아웃 토크필터를 작동(On)시키는 단계와, 상기 차량의 클러치 스위치 동작(On) 여부를 판단하는 단계와, 상기 클러치 스위치가 동작(0n)되는 경우 상기 팁아웃 토크필터를 해제(Off)하여 연료 분사 정지(fuel cut)를 실시하는 단계 및 상기 차량의 스로틀 플랩을 제어를 통해 엔진의 회전수를 감소시키는 단계를 포함하는 수동변속기 차량의 변속 제어 방법에 관한 것으로서, 본 발명에 의하면 신속한 변속 응답성과 함께 차량의 소음 진동을 감소시킴으로써 상품성과 신뢰성을 향상시킬 수 있는 효과가 있다.
Abstract:
PURPOSE: A method for controlling a vehicle transmission is provided to prevent tip-out jerk by supplying a small amount of fuel using a tip-out torque filter. CONSTITUTION: Tip-out is detected when users drive vehicles(S10, S20) A tip-out torque filter is operated when the tip-out is detected(S30). Whether or not a clutch switch is operated(S40). A fuel injection stops(S50) by releasing the tip-out torque filter when the clutch switch is in operation(S50). Engine RPM is reduced by controlling a throttle flap of a vehicle(S60). [Reference numerals] (S10) Normal driving; (S30) Operate a tip-out torque filter; (S40) Clutch switch on?; (S50) Release the tip-out torque filter; (S60) Operate throttle flap control; (S70) Engine RPM