Diesel-gasoline dual fuel powered engine with fouling free clean EGR system

摘要

A fouling free clean EGR system for a diesel-gasoline dual fuel powered engine allows re-circulation of an exhaust gas of a certain cylinder among a plurality of cylinders. The fouling free clean exhaust gas recirculation (EGR) system for a diesel-gasoline dual fuel powered engine in which gasoline and air are pre-mixed and supplied to cylinders and then a diesel fuel is injected and combusted together comprises a directly-exhaust cylinder of which an exhaust valve of the cylinder is connected to an exhaust manifold directly connected to a after treatment device; and an EGR cylinder of which an exhaust valve of the cylinder is connected to an EGR line and which supplies the EGR gas to the diesel-gasoline dual fuel powered engine.

主权项

1. A fouling free clean exhaust gas recirculation (EGR) system of a diesel-gasoline dual fuel powered engine in which gasoline and air are pre-mixed and supplied to cylinders and then a diesel fuel is injected and combusted together, comprising:
a directly-exhaust cylinder including a first exhaust valve connected to an exhaust manifold directly connected to an after treatment device; and an EGR cylinder including a second exhaust valve connected to an EGR line and supplying an EGR gas from the EGR cylinder to the diesel-gasoline dual fuel powered engine; wherein the EGR line is connected with the EGR cylinder without being connected with the directly-exhaust cylinder, wherein a first bypass valve is provided on the EGR line between the EGR cylinder and the cooler, and wherein a second bypass valve is provided between the first bypass valve and the after treatment device to transfer the EGR gas, which has passed through the first bypass valve, to a turbine of the turbo charger or to the after treatment device.