An engine system is provided, which includes an engine, a swirl control valve, and a controller. The engine includes a cylinder, a piston, and a fuel injection valve provided incliningly with respect to an axial direction of the piston and configured to directly inject fuel into the cylinder. The swirl control valve is provided inside an intake passage and generates a swirl flow inside the cylinder at least when the valve closes. When an engine load is below a given threshold, the controller controls the swirl control valve to close, and controls the fuel injection valve to inject fuel during an intake stroke. While the engine load is below the threshold, at a fixed engine speed, the controller controls to advance a fuel injection timing when the engine load is at a first load, compared with at a second load higher than the first load.

An internal combustion engine system including an internal combustion engine and an exhaust gas recirculation circuit connecting an exhaust manifold of the engine to an intake manifold of the engine, the circuit including at least one reed valve, an EGR valve, that is arranged downstream of the reed valve on the path of exhaust gas flowing from the exhaust manifold to the intake manifold and an EGR line connecting the reed valve to the EGR valve. The system further includes a bypass line for gas, connecting the EGR line to an exhaust line of the engine and controller for controlling the flow of gas discharged through the bypass line.

An internal combustion engine system including an internal combustion engine and an exhaust gas recirculation circuit connecting an exhaust manifold of the engine to an intake manifold of the engine, the circuit including at least one reed valve, an EGR valve, that is arranged downstream of the reed valve on the path of exhaust gas flowing from the exhaust manifold to the intake manifold and an EGR line connecting the reed valve to the EGR valve. The system further includes a bypass line for gas, connecting the EGR line to an exhaust line of the engine and controller for controlling the flow of gas discharged through the bypass line.

The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.

The present invention relates to an oil tank ventilation device for a hydraulic brake unit of a tramcar, comprising a vent plug, a sealing ring, a gas guide hole and a gas guide pipe; the gas guide hole is a through-hole structure arranged at an upper end inside an integrated valve block; the communications of electrical element protection case, integrated valve block and the oil tank are realized by the gas guide pipe stretched into an air chamber of the oil tank and by the vent plug configured in the electrical element protection case. When the surface of the oil tank is covered with ice or snow, the rain or snow can be effectively prevent from falling on the vent plug body and the driving safety of the train is ensured.

An intake air control apparatus of an engine includes a housing having an intake air inflow passage for receiving external air, an exhaust gas inflow passage for receiving recirculated exhaust gas, and an intake air supply passage for supplying the external air from the intake air inflow passage or the exhaust gas from the exhaust gas inflow passage to the engine. A motor gear rotates together with an output shaft of the motor. A connection gear is engaged and rotates together with the motor gear. A recirculation gear is engaged and rotates together with the connection gear. A recirculation valve opens and closes the exhaust gas inflow passage since the recirculation valve rotates together with the recirculation gear. An intake air gear is engaged and rotates together with the connection gear. An intake air throttle valve opens and closes the intake air inflow passage.

An intake air control apparatus of an engine includes a housing having an intake air inflow passage for receiving external air, an exhaust gas inflow passage for receiving recirculated exhaust gas, and an intake air supply passage for supplying the external air from the intake air inflow passage or the exhaust gas from the exhaust gas inflow passage to the engine. A motor gear rotates together with an output shaft of the motor. A connection gear is engaged and rotates together with the motor gear. A recirculation gear is engaged and rotates together with the connection gear. A recirculation valve opens and closes the exhaust gas inflow passage since the recirculation valve rotates together with the recirculation gear. An intake air gear is engaged and rotates together with the connection gear. An intake air throttle valve opens and closes the intake air inflow passage.

An engine system is provided, which includes an engine, a swirl control valve, and a controller. The engine includes a cylinder, a piston, and a fuel injection valve provided incliningly with respect to an axial direction of the piston and configured to directly inject fuel into the cylinder. The swirl control valve is provided inside an intake passage and generates a swirl flow inside the cylinder at least when the valve closes. When an engine load is below a given threshold, the controller controls the swirl control valve to close, and controls the fuel injection valve to inject fuel during an intake stroke. While the engine load is below the threshold, at a fixed engine speed, the controller controls to advance a fuel injection timing when the engine load is at a first load, compared with at a second load higher than the first load.

An engine system is provided, which includes an engine, a swirl control valve, and a controller. The engine includes a cylinder, a piston, and a fuel injection valve provided incliningly with respect to an axial direction of the piston and configured to directly inject fuel into the cylinder. The swirl control valve is provided inside an intake passage and generates a swirl flow inside the cylinder at least when the valve closes. When an engine load is below a given threshold, the controller controls the swirl control valve to close, and controls the fuel injection valve to inject fuel during an intake stroke. While the engine load is below the threshold, at a fixed engine speed, the controller controls to advance a fuel injection timing when the engine load is at a first load, compared with at a second load higher than the first load.

An engine device in which an exhaust gas purification device can be disposed without substantially increasing mounting width dimensions (height, lateral width, front and rear width) of an engine. The engine device includes the exhaust gas purification device connected to an exhaust manifold of the engine, an oil pan disposed on a bottom of the engine, a support body for linking the exhaust gas purification device to the oil pan, so that the exhaust gas purification device is supported by the oil pan.