Abstract:
PURPOSE: An engine control method for preventing knocking is provided to protect an engine by previously checking knocking when an LNG vehicle is suddenly operated. CONSTITUTION: An engine control method for preventing knocking is as follows. A gas composition ratio is calculated by an engine control device of an LNG vehicle(S300). It is determined whether knocking will be generated or not based on the content of methane of the calculated fuel(S400). When it is determined that the knocking is generated, the engine control device retards an ignition timing of the engine(S700).
Abstract:
본 발명은 장시간 아이들운전시 발생되는 백색매연의 개선에 관한 것으로서, 그 방법은 전자제어장치(ECU)에서의 입,출력 신호 모니터링 단계; 상기 단계에서 모니터링 결과, 엔진냉각수 온도의 기준온도 이하여부 판단 단계; 상기 단계에서, 엔진냉각수의 온도가 기준온도 이하인 경우에 흡기에어히터 작동 단계; 상기 단계에서, 흡기에어히터의 동작으로 엔진에 온기공급 후 전자제어장치에서의 밧데리전압 모니터링 단계; 상기 단계에서 모니터링 결과, 밧데리전압이 설정된 기준전압 이하로 저하된 경우에 연료분사량을 증가시켜 엔진회전수를 상승(idle up)시키는 단계; 상기 단계에서, 엔진회전수 상승 후 입력신호의 변화여부 판단 단계; 상기 단계에서, 전자제어장치로의 입력신호의 변화가 없는 경우에 엔진회전수의 상승 유지 단계; 상기 단계에서, 엔진회전수의 상승으로 밧데리전압의 충전여부 확인 단계; 및 상기 단계에서, 밧데리전압의 충전이 정상상태로 이루어지지 않은 경우에는 엔진회전수의 상승(idle up)이 유지되며, 반면 밧데리전압의 충전이 정상상태로 이루어진 경우에는 연료분사량을 정상으로 복귀시켜 엔진회전수를 정상 공회전상태로의 복귀 단계로 이루어진다.
Abstract:
PURPOSE: A pressure stabilizing apparatus for a diesel engine is provided to stabilize intake air pressure supplied into a boost compensator by installing the pressure stabilizing apparatus between an intake manifold and the boost compensator. CONSTITUTION: A pressure stabilizing apparatus is installed between an intake manifold of a diesel engine and a boost compensator of a fuel injection device so as to stabilize pressure of air supplied into the fuel injection device from the intake manifold. A housing(40) is installed at one side of a hose(11). A first porous plate(41) is vertically installed in the housing(40) in order to form a first chamber(51) in the housing(40). A second porous plate(42) and the first porous plate(41) are installed at interval of a predetermined spacing in the housing(40) so as to form second and third chambers(52,53) in the housing(40).
Abstract:
본 발명은 노킹 방지 엔진 제어 방법에 관한 것으로, 액화 천연 가스 차량의 엔진제어장치(100)가 연료 탱크 내부의 가스 조성비를 계산하는 과정인 엔진 상태 판단 단계와; 상기 엔진제어장치(100)에서 계산된 연료의 메탄 함유량을 토대로 노킹이 발생될 것인지를 판단하는 노킹 판단 단계와; 상기 노킹 판단 단계에서 노킹이 발생될 것으로 판단되면 상기 엔진제어장치(100)가 엔진의 점화 타이밍을 지각시키는 엔진 점화 시기 조정 단계를;포함하여 구성되는 것을 특징으로 하는 노킹 방지 엔진 제어 방법에 관한 것이다. 본 발명에 의하면 엘엔지 차량이 일정기간 이상 운행되지 않다가 운행되더라도 노킹이 미리 체크되어 엔진을 보호하는 효과가 있다. 노킹, 방지, 엔진, 제어, 방법
Abstract:
PURPOSE: A structure for connecting an injection pump with an air compressor is provided to reduce and prevent the torsional vibration of the air compressor. CONSTITUTION: In a structure for connecting an injection pump(5) with an air compressor(1), the air compressor(1) is driven by an engine. A damper(3) is mounted on a shaft(7) in the air compressor(1). A cam shaft(9) in the injection pump(5) is connected to one side of the damper(3) to be driven with the air compressor(1).
Abstract:
PURPOSE: A heating device of a diesel fuel injecting pipe is provided to prevent fuel passing through the fuel injecting pipe from being solidified as paraffin and accordingly to improve the cold startability of an engine. CONSTITUTION: A diesel fuel injecting pipe(20) is formed into a double-metal pipe to guide the transfer of high-pressure fuel to connect an injector and a delivery pipe and formed with nipples at both ends to assemble with the injector and the delivery pipe. A heating device of the diesel fuel injecting pipe comprises wires(31,32) for applying electric power of a battery(30) to the diesel fuel injecting pipe formed into the double-metal pipe and a relay(33) for applying electric power to the wires by the control of an electronic control unit(40). The heating device makes the diesel fuel injecting pipe emit heat when temperature around the engine detected by a temperature sensor(41) is below a predetermined temperature.
Abstract:
PURPOSE: A fuel injector for a diesel engine is provided to reduce NOx and fine particles and to improve a fuel consumption ratio of a vehicle by reducing an injection delay time and a rapid spill. CONSTITUTION: A fuel injector includes an injection pipe(7a) for supplying fuel from an injection pump and an injection nozzle(5) for injecting fuel into a combustion chamber when the pressure of fuel exceeds a reference value. A flow-limit(10) is installed between an end of an injection pipe(7a) and an inlet pipe(5b) of the injection nozzle(5) to limit a fuel flow. The flow-limit(10) is opened when pressure of fuel exceeds a predetermined level so that fuel flows towards the injection nozzle(5). The flow-limit(10) is closed when pressure of fuel is under the predetermined level, so that high pressure is maintained in the injection nozzle(5).
Abstract:
PURPOSE: A structure for inhaling the air of an engine is provided to inhale intake air by the negative pressure of the engine in cold-starting and to pressurize the intake air by a turbocharger in normal starting. CONSTITUTION: An exhaust bypass line(32) connects the rear of an exhaust manifold(11) to an exhaust line in the rear of a turbine case. An intake bypass line(42) connects an intake line in the front of a blow case to an intake manifold. An exhaust control valve(30) is installed at a divergence point of the exhaust bypass line, and controls the flow direction of exhaust gas. An intake control valve(40) is installed at a divergence point of the intake bypass line, and controls the flow direction of intake air. A linkage(50) operates the exhaust control valve and intake control valve according to the driving condition of an engine. An electronic control unit drives the linkage.
Abstract:
PURPOSE: A structure for inhaling the air of an engine is provided to inhale intake air by the negative pressure of the engine in cold-starting and to pressurize the intake air by a turbocharger in normal starting. CONSTITUTION: An exhaust bypass line(32) connects the rear of an exhaust manifold(11) to an exhaust line in the rear of a turbine case. An intake bypass line(42) connects an intake line in the front of a blow case to an intake manifold. An exhaust control valve(30) is installed at a divergence point of the exhaust bypass line, and controls the flow direction of exhaust gas. An intake control valve(40) is installed at a divergence point of the intake bypass line, and controls the flow direction of intake air. A linkage(50) operates the exhaust control valve and intake control valve according to the driving condition of an engine. An electronic control unit drives the linkage.