Abstract:
본 발명은 하이브리드 차량의 모터를 이용하여 차량의 부압을 일정하게 유지하여 안정적 제동력을 확보할 수 있는 하이브리드 차량의 부압 제어방법에 관한 것으로, 하이브리드 차량의 모터가 차량 가속시 엔진 힘을 보조해주거나, 감속시 차량의 동력을 회수하는 하이브리드 모터 본래의 기능과는 별도로 차량의 브레이크 부압이 목표 부압 이하로 떨어지는 것을 방지하고, 차량의 부압을 일정하게 유지하여 안정적 제동력을 확보하도록 브레이크 부압이 일정 값 이하로 떨어지는 시점에서 모터 보조 토크값을 계산하여 모터 제어를 시작하여 차량의 부하로 인한 부압 감소를 모터 보조를 통해 보상해준다. 하이브리드, 차량, 부압, 제어
Abstract:
엔진 회전수 및 엔진 부하량을 기초로 한 목표 토크율을 점화시기 및 토크율 사이의 설정된 상관관계를 이용하여 산출하고, 산출된 목표 토크율에 해당하는 목표점화시기를 상기 설정된 상관관계를 이용하여 산출한 후, 상기 산출된 점화시기를 기초로 점화장치를 구동함으로써, 보다 일정한 제어효율 그리고 보다 빠른 응답성을 얻을 수 있다.
Abstract:
There is a time delay between the moment of fuel injection and the moment when air with the injected fuel is drawn into cylinders. At the time of fuel injection, air-mass that will be drawn into cylinders after the delay time is estimated on the basis of expectation values of throttle opening, air-mass drawn into an intake-manifold, and intake-manifold pressure. Fuel amount is in turn calculated based on the estimated air-mass.
Abstract:
PURPOSE: A heater drive control method of an oxygen sensor is provided to enable utilization even when low exhaust temperature is maintained by exactly forecasting the dew point passing time of the oxygen sensor without the use of hardware and controlling the heating strength of the oxygen sensor. CONSTITUTION: A heater drive control method of an oxygen sensor comprises steps of deciding whether an engine is in a starting state(S10); setting up the heater drive duty of the oxygen sensor to zero percent, setting up a dew point passing flag to False, and setting up a restart routine flag to False(S20); calculating the heat capacity transmitted to the oxygen sensor(S30); calculating the restart frequency(S40); calculating the dew point passing heat capacity(S50); deciding dew point passing by comparing the heat capacity transmitted to the oxygen sensor with the dew point passing heat capacity(S60); driving a heater by controlling the heater drive duty of the oxygen sensor to 100 percent(S70); driving the heater by restricting the heater drive duty of the oxygen sensor to a predetermined restriction value(S80); deciding whether the engine is throttled or an ignition key is turned off(S90); and storing a related variable value to a non-volatile memory of an engine control unit(S100).
Abstract:
PURPOSE: A device and a method for controlling the idle of a vehicle with an automatic transmission are provided to secure the stability and reliability of ISA(Idle Speed Actuator) compensating air control by quantitatively deciding torque necessary for an engine in changing a shift lever through detecting physical properties of a torque converter. CONSTITUTION: A method for controlling the idle of a vehicle with an automatic transmission is composed of steps for deciding if the condition information of the vehicle detected in starting an engine is idle(S101); not performing an ISA air amount compensating mode in a non-idle state and deciding if the change of a shift lever is detected in an idle state(S102); deciding if the change of a traveling range to a neutral range when the change of the shift lever is detected(S104); detecting an ISA compensating air amount value to a map table set after a constant time required for line pressure release in changing the shift lever from the traveling range to the neutral range and then performing the ISA air amount compensation by adding ISA compensating air amount and other compensating air amount to the ISA basic air amount(S108,S130); computing the physical properties of a torque converter after the constant time required on forming line pressure if the shift lever is changed from the neutral to the traveling range; computing the ISA compensating air amount by calculating the demand torque of the engine to the computed physical properties of the torque converter; and executing the ISA air amount compensation by including the basic ISA air amount and the other compensating air amount to the ISA compensating air amount calculated to the demand torque of the engine.
Abstract:
In the invention an apparatus and method direct an engine speed to converge to a target idle speed by detecting a current engine speed, calculating a dynamic reference speed based on the current engine speed, calculating a target idle speed actuator (ISA) opening based on the dynamic reference speed and the current engine speed, and actuating the ISA based on the target ISA opening.
Abstract:
PURPOSE: A method and an apparatus are provided to achieve improved response time and efficiency of control of engine idle RPM. CONSTITUTION: A method comprises a step(S415) of detecting an engine RPM and an engine load; a step(S420) of calculating a target torque rate based on the engine RPM and engine load by using the preset relation between the ignition timing and torque rate; a step(S450) of calculating a target ignition timing corresponding to the target torque rate calculated in the previous step by using the preset relation; and a step(S470) of driving an ignition device based on the calculated ignition timing.
Abstract:
PURPOSE: An apparatus and a method are provided to achieve improved reliability of the manifold air pressure sensor, while stabilizing an emission by preventing distortions of fuel-air ratio during the operation of the engine. CONSTITUTION: An apparatus comprises a manifold air pressure sensor(10) for outputting a voltage value by detecting the air pressure flowing into an intake manifold; an information detection unit mounted on an intake system, which detects information on the intake-air; an RPM sensor(50) for outputting a voltage value by detecting the current engine RPM; a control unit(60) for diagnosing failure of the manifold air pressure sensor by comparing the voltage value output from the manifold air pressure sensor falls within the preset highest threshold level and the lowest threshold level, and performing a substantial failure diagnosis of the manifold air pressure sensor by comparing the intake manifold pressure of the current engine and the pressure obtained from the manifold air pressure sensor; an injector(70) for injecting the calculated amount of fuel in accordance with the control signal applied from the control unit; and an ignition unit(80) for maintaining combustion of the engine by advancing or delaying the ignition timing in accordance with the control signal applied from the control unit.
Abstract:
본 발명은 하이브리드 자동차의 주행 제어 방법에 관한 것이며, 상세하게는 공회전 자동 엔진 정지/시동(Idle Stop & Start) 기능을 가지는 병렬형 하이브리드 자동차(Parallel Hybrid vehicle)에서 연료차단제어 방법을 개선하여 연비 향상 및 배출가스 저감을 위한 것이다. 본 발명은 연료차단제어 가능 RPM과 해제 RPM을 현재 차량 상태로부터 ECU (Engine Control Unit)가 결정하는 제 1단계와; 현재 차속이 소정속도 이상일 경우 차량 상태가 연료차단제어 진입이 판단하는 제 2단계와; 상기 제 2단계에서 연료차단제어 진입 판단을 한 경우, 그 결과를 HCU(Hybrid Control Unit)에 전달하는 제 3단계와; 운전자에 의하여 가속페달을 놓은 후, 현재 엔진 RPM이 상기 연료차단제어 가능 RPM 이상이면 연료차단제어를 시작하는 제 4단계와; 상기 연료차단제어 이후 엔진 RPM이 연료차단제어 해제 RPM 이하가 되면 상기 HCU로부터 연료차단제어 해제 금지 요구가 있는지를 확인하는 제 5단계와; 연료차단제어 상태를 HCU에 전송하는 제 6단계를 포함하여; 상기 운전자에 의하여 가속페달을 밟지 않고, 상기 5단계에서 연료차단해제 금지 요구가 있을 경우에는 공회전 자동 엔진 정지시까지 연료차단제어를 진행한다. 병렬형 하이브리드 자동차, 주행제어방법, 연료차단제어
Abstract:
PURPOSE: A method for stabilizing idling and decreasing RPM(Revolution Per Minute) of a vehicle is provided to keep stability of idling by compensating continuously in overshooting RPM, and to eliminate uneasiness of a driver by reducing noise from the engine. CONSTITUTION: In a method for keeping idling stably and decreasing RPM of a vehicle, idling of an engine of the vehicle is detected(110), and the rate of RPM is calculated by dividing the desired idle RPM by the present RPM in idling the engine(120). With the calculated RPM rate, the idle compensation factor is gained from the compensate table of idle RPM decrease(130). The compensation amount is decided by multiplying the idle compensation factor by the idle speed control basic air amount, and the final idle speed control opening degree is calculated with adding the opening degree by the idle speed control PID(140).