Abstract:
본 발명은 VVL 기구의 록핀을 리턴시키는 리턴스프링의 탄성력을 비정상적으로 증가시키지 않고도, 상온 영역을 포함한 저온 이하의 영역이나, 오일 내에 과다한 SOOT 등과 같은 오일 열화 요인에 의해, 오일의 점도가 매우 높은 악조건에서도 VVL 기구의 의도하지 않은 하이리프트 발생을 방지함은 물론, 엔진의 전 작동 영역에서 안정적으로 적절한 VVL 기구의 작동이 이루어지도록 함과 아울러 HLA 및 기타 윤활이 필요한 부분의 원활하고 안정된 윤활 성능을 확보할 수 있도록 한다.
Abstract:
PURPOSE: A diesel-gasoline mixed combustion engine, a control method thereof, and diesel-gasoline mixed combustion system with a complex ignition method are provided to operate the diesel-gasoline mixed combustion system beyond the operating area by performing ignition with a spark plug. CONSTITUTION: A diesel-gasoline mixed combustion engine with a complex ignition method comprises a cylinder block, a spark plug, a diesel injector, and an electric control unit. The cylinder block comprises a plurality of cylinders, and each cylinder is connected to intake and exhaust manifolds. The spark plug and diesel injector are respectively placed in the cylinders. The electric control unit sucks a gasoline mixture into the cylinders, and performs ignition by the spark plug when the operating area is in a heavy or light load area. The electric control unit performs compression-ignition by injecting diesel to the diesel injector when the operating area is between the heavy and light load areas. [Reference numerals] (S110) Cold operating?; (S120) Mixed combustion region?; (S131) Mixed combustion mode; (S132) Gasoline combustion mode; (S140) Engine end?
Abstract:
본 발명은 디젤-가솔린 혼합 연소가 이루어지는 엔진의 연소 제어 방법에 관한 것으로서, 디젤-가솔린 혼합 연소가 이루어지는 엔진에서 고부하 운전 영역에서의 노킹 문제 및 저부하 운전 영역에서의 착화 불안정성 문제를 개선할 수 있는 연소 제어 방법 및 장치를 제공하는데 주된 목적이 있는 것이다. 상기한 목적을 달성하기 위해, 디젤과 가솔린 연료의 혼합 연소가 이루어지는 혼합 연소 모드와, 가솔린 연료만을 연소시키는 가솔린 연소 모드를 갖는 엔진의 연소 제어 방법에 있어서, 혼합 연소 모드와 가솔린 연소 모드 중 엔진의 현 운전 상태에 따른 연소 모드를 판단하는 단계; 엔진의 현 운전 상태에 따른 연소 모드에 해당하는 압축비를 결정하는 단계; 가변 압축비 장치의 작동을 제어하여 실린더의 압축비를 상기 결정된 압축비로 제어하는 단계; 상기 압축비로의 제어 후 연소 동안 구해지는 엔진의 연소 상태가 연소 안정성을 확보하기 위한 설정된 조건을 만족하는지를 판단하는 단계; 및 상기 설정 조건을 만족시키지 않으면 연소압 센서 신호를 피드백 신호로 하여 설정 조건을 만족하도록 가변 압축비 장치를 통한 압축비 보정을 수행하는 단계;를 포함하는 혼합 연소 모드를 갖는 엔진의 연소 제어 방법, 및 이를 구현하는 연소 제어 장치를 제공한다.
Abstract:
According to the present invention, without the abnormal increase of elastic force of a return spring returning a lock pin of a VVL mechanism, the undesired generation of a high-lift in the VVL mechanism can be prevented even in an area at a temperature lower than or equal to a low temperature, or under a bad condition in which the viscosity of oil is extremely raised by an oil deterioration factor such as excessive soot inside the oil; the operation of the VVL mechanism can be stably and properly operated in the whole operation area of an engine; and a smooth and stable lubrication performance for an HLS and other parts requiring lubrication can be secured, wherein the area at a temperature lower than or equal to a low temperature includes a room-temperature area.
Abstract:
According to the present invention, without the abnormal increase of the elastic force of a return spring returning the lock pin of a VVL mechanism, the undesired generation of a high-lift in the VVL mechanism can be prevented even in an area at a temperature less than or equal to low temperature or under a bad condition in which the viscosity of oil is raised by an oil deterioration factor such as excessive soot inside the oil; the operation of the VVL mechanism can be stably and properly operated in the whole operation area of an engine; and a smooth and stable lubrication performance for an HLA and other parts requiring lubrication can be secured, wherein the area at a temperature less than or equal to low temperature includes a room-temperature area.
Abstract:
The present invention relates to a piston pin for a variable compression ratio engine to increase the effective length of a connecting rod in a variable compression ratio engine. The piston pin (10, 10′) for a variable compression ratio engine according to the present invention is used for connecting a piston (21) to the connecting rod (22) in the variable compression ratio engine; and has a greater diameter at one part to be connected to the connecting rod (22) than the other part to be connected to the piston (21).
Abstract:
The present invention relates to a method for controlling a transient operation section of a mixed combustion engine system capable of obtaining control stability by controlling EMS based on dynamic modeling when a combustion mode is converted in the mixed combustion engine system. An EMS parameter is a ratio of diesel fuel to gasoline fuel, an ignition time, an injection time, and a fluid pressure compression ratio. [Reference numerals] (AA,II) Engine speed; (BB,JJ) Fuel amount; (CC,SS) Ratio of gasoline/diesel fuel; (DD,TT) Ignition time(Spark plug); (EE,UU) Injection time(Diesel injector); (FF) Variable effective compression ratio(variable compression ratio, variable valve device); (GG,LL,WW) Intake manifold pressure; (HH,KK) Intake manifold temperature; (MM) Air amount; (NN) Fuel ratio model; (OO) Ignition time model; (PP) Injection time model; (QQ) Variable effective compression ratio model; (RR) Intake manifold pressure model; (VV) Variable effective compression ratio