A valve device increases or decreases a flow rate of EGR gas. The valve device includes a housing, a bypass valve body, an EGR valve body. The housing includes a first upstream passage into which the EGR gas cooled by an EGR cooler flows, a second upstream passage into which the EGR gas that bypasses the EGR cooler flows, a junction connected to each of a gas-flow downstream side of the first upstream passage and a gas-flow downstream side of the second upstream passage, and a downstream passage connected to the first upstream passage and the second upstream passage via the junction. The bypass valve body opens and closes the second upstream passage. The EGR valve body is provided in the downstream passage, rotates around an EGR valve axis.

The invention relates to an internal combustion engine system. The system includes a mixing unit comprising a four-way valve. The four-way valve having a first inlet connected to the EGR line, a second inlet connected to the air inlet line, a first outlet connected to the first intake manifold and a second outlet connected to the second intake manifold. The four-way valve is designed so that, in said normal operating mode, the intake gases supplied to the first intake manifold and to the second intake manifold have approximately the same proportion of exhaust gas and fresh air and so that, in said cylinder deactivation mode, the intake gas supplied to the first intake manifold only includes exhaust gas and the fresh air is directed exclusively to the second intake manifold.

The present disclosure provides an engine system of a vehicle including an engine having combustion chambers for generating driving torque by burning fuel; an intake line in which fresh air flowing into the combustion chambers flows; an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a recirculation line connecting the exhaust line and the intake line; a turbocharger including a turbine disposed at the exhaust line and rotated by the exhaust gas from the combustion chambers, and a compressor disposed at the intake line and rotated together with the turbine and compressing fresh air; an exhaust gas recirculation valve disposed at the connection of the recirculation line and the intake line to adjust an exhaust gas recirculation gas amount supplied to the intake line through the recirculation line; and a remaining gas elimination apparatus for supplying gas remaining in the intake line to the recirculation line.

The present disclosure provides an engine system of a vehicle including an engine having combustion chambers for generating driving torque by burning fuel; an intake line in which fresh air flowing into the combustion chambers flows; an exhaust line in which exhaust gas exhausted from the combustion chambers flows; a recirculation line connecting the exhaust line and the intake line; a turbocharger including a turbine disposed at the exhaust line and rotated by the exhaust gas from the combustion chambers, and a compressor disposed at the intake line and rotated together with the turbine and compressing fresh air; an exhaust gas recirculation valve disposed at the connection of the recirculation line and the intake line to adjust an exhaust gas recirculation gas amount supplied to the intake line through the recirculation line; and a remaining gas elimination apparatus for supplying gas remaining in the intake line to the recirculation line.

The invention concerns a discharge valve (17) intended to be fitted in a discharge duct of an apparatus designed to be driven by a fluid, in particular a turbocharger driven by the exhaust gases from an engine. The discharge valve (17) comprises a cavity (83) having a first (85), a second (87) and a third aperture (89), each intended to be connected to a respective duct, the discharge valve (17) also comprising first (91) and second (93) means for closing the first (85) and second (87) apertures, respectively, in order to control communication between the ducts.

The invention concerns a discharge valve (17) intended to be fitted in a discharge duct of an apparatus designed to be driven by a fluid, in particular a turbocharger driven by the exhaust gases from an engine. The discharge valve (17) comprises a cavity (83) having a first (85), a second (87) and a third aperture (89), each intended to be connected to a respective duct, the discharge valve (17) also comprising first (91) and second (93) means for closing the first (85) and second (87) apertures, respectively, in order to control communication between the ducts.

A mixing valve of an internal combustion engine of a motor vehicle includes: a flap arranged in a suction channel and a flap arranged in an exhaust gas channel. One single flap of the two flaps is drivable via a gear pair with non-round or eccentric gears. The drive of the other flap has lost motion, whereby the closing movements of the flaps can be formed in a particularly free manner with only a single actuating motor.

A mixing valve of an internal combustion engine of a motor vehicle includes: a flap arranged in a suction channel and a flap arranged in an exhaust gas channel. One single flap of the two flaps is drivable via a gear pair with non-round or eccentric gears. The drive of the other flap has lost motion, whereby the closing movements of the flaps can be formed in a particularly free manner with only a single actuating motor.

An exhaust gas recirculation (EGR) system with a diesel particulate filter (DPF) incorporated before the EGR cooler to filter the particulate matter from the EGR before entering the air intake. With the DPF installed before the EGR cooler soot buildup in all EGR components and air intake track is reduced or eliminated. Installing the DPF before the EGR cooler allows the DPF to be in passive regeneration while the vehicle's engine is in operation, extending the life and maintenance interval of the DPF. Alternatively, the DPF may be installed after the EGR cooler, reducing or eliminating soot buildup in the EGR valve and air intake.

A mixture formation device for an internal combustion engine operated with a burnable gas, preferably compressed natural gas CNG, comprises a combination of a quantity regulator, a gas mixer, a flow-guiding element for pressure recovery, and a connection possibility for exhaust gas recirculation of the internal combustion engine. The mixture formation device according to the invention can empty a gas tank to a comparatively low pressure of approx. 2 bar, an excellent mixture formation being achieved over the entire range of speed and load range of the internal combustion engine. According to the invention, such a mixture formation device can reduce production costs as well as space requirements compared to known solutions. An internal combustion engine operated with a burnable gas, particularly compressed natural gas (CNG), may also comprise such a mixture formation device in the intake tract thereof.