Abstract:
본 발명은 혼합연소 엔진의 고/전부하 운전 영역에서 압축 행정 시 디젤 연료를 분사하고 EGR 장치를 적용함으로써 연료-공기 혼합기의 압축 온도를 낮추어 고부하 운전영역에서 가솔린 연료에 의한 노킹 발생을 방지할 수 있는 디젤/가솔린 혼합연소 적용 엔진의 연소 제어 방법에 관한 것이다. 또한, 본 발명은 고부하 가솔린 운전 영역에서 디젤 연료를 분사시켜 디젤 인젝터 노즐을 냉각함으로써, 높은 연소온도에 의한 디젤 인젝터 노즐이 용융되는 현상의 발생을 방지할 수 있다.
Abstract:
PURPOSE: An EGR(Exhaust Gas Regeneration) control system of the gasoline/diesel fuel mixing compression ignition combustion engine and a method thereof are provided to control the combustion time of the gasoline/diesel fuel mixing compression ignition combustion engine and minimize producing particulate matter, thereby preventing the operability of EGR system from deteriorating by using the particulate matter. CONSTITUTION: An EGR control system of the gasoline/diesel fuel mixing compression ignition combustion engine include a plurality of cylinders(101~104) and an exhaust gas line(200). The cylinder includes a fuel injector(101a, 102a, and 103a). Exhaust gas, which is discharged by combusting fuel from the cylinder, flows in the exhaust gas line. An ignition plug(104a) is installed in any one of cylinder among the plurality of cylinders. [Reference numerals] (AA) Post treatment device
Abstract:
PURPOSE: A multi-sac injector is provided to maximize the engine combustion efficiency of all load regions and to remarkably reduce contaminant caused by smoke and NOx in a low-load region. CONSTITUTION: A multi-sac injector comprises a needle(1), a nozzle(2), and a fuel injection hole. The nozzle includes a nozzle chamber(6) with at least two separate fuel flowing spaces. The fuel injecting hole includes a main sac(11) and a sub sac(12). The main sac injects fuel to be suitable for the premixing ignition of a low-load region. The sub sac injects the fuel to be suitable for the diffusion combustion of a middle/high load region.
Abstract:
PURPOSE: A diesel-gasoline complex fuel engine is provided to make a combustion chamber stratified into a high concentration EGR(Exhaust Gas Recirculation) space and a relatively low concentration EGR, thereby securing the ingnitionability in low-speed low-load area improves to improve combustion. CONSTITUTION: A diesel-gasoline complex fuel engine includes an EGR air intake port(10), an air intake valve(20), a gasoline injector and a diesel injector. The EGR air intake port comprises a tangential port(11) supplying the fuel-air mixture with low EGR rate and a helical port(12) supplying the fuel-air with high EGR rate. The air intake valve comprises a tangential valve(21) equipped on the tangential port and a helical valve(22) equipped on the helical port. The gasoline injector is equipped on an air intake manifold(30) and injects gasoline fuel into the air. The diesel injector injects diesel fuel directly into combustion chamber(3) instead of a spark plug. [Reference numerals] (AA) Exhaust gas;