A fluid actuated normally closed coolant control valve. The valve comprises a valve housing, an inlet port, the inlet port configured for fluid communication with either a coolant source or a heat exchanger of a DEF tank; an outlet port configured for fluid communication with the other of the heat exchanger of a DEF tank or the coolant source; a valve chamber, a valve and an actuator configured to actuate the valve. The actuator is a fluid actuated piston. The valve is biased to a closed condition in which the flow of coolant from the inlet port to the outlet port is prevented by the valve. The valve is actuatable to an open condition in which the flow of coolant from the inlet port to the outlet port is permitted, and the valve is withdrawn from the valve chamber, wherein the flow factor for the valve is greater than 1.5.

A two-way valve having a central body with a first end and a second end, the central body has a first internal valve and a second internal valve, the first internal valve enables the passage of a fluid along a first internal path only in the direction that goes from the second end to the first end of the central body, when a first fluid pressure threshold is exceeded, and the second internal valve enables the passage of a fluid along a second internal path only in the direction that goes from the first end to the second end of the central body, when a second fluid pressure threshold is exceeded, characterized in that a first axis of symmetry of the first internal path and a second axis of symmetry of the second internal path are parallel to each other and parallel to a longitudinal axis of the central body.

A two-way valve having a central body with a first end and a second end, the central body has a first internal valve and a second internal valve, the first internal valve enables the passage of a fluid along a first internal path only in the direction that goes from the second end to the first end of the central body, when a first fluid pressure threshold is exceeded, and the second internal valve enables the passage of a fluid along a second internal path only in the direction that goes from the first end to the second end of the central body, when a second fluid pressure threshold is exceeded, characterized in that a first axis of symmetry of the first internal path and a second axis of symmetry of the second internal path are parallel to each other and parallel to a longitudinal axis of the central body.

A system includes an engine defining a water jacket fluidly coupled to a heat exchanger. An exhaust manifold defines an exhaust manifold cooling passage. A pump is fluidly coupled to the water jacket, and to each of the heat exchanger and the exhaust manifold cooling passage. An engine cooling circuit includes the water jacket, the heat exchanger, and the pump. An exhaust cooling circuit is selectively fluidly coupled to the engine cooling circuit. The exhaust cooling circuit includes the water jacket, the exhaust manifold cooling passage, and the pump. A control valve includes an inlet fluidly coupled to a first portion of the water jacket. A first outlet is fluidly coupled to a second portion of the water jacket. A second outlet is fluidly coupled to the exhaust cooling circuit. The control valve is structured to selectively control flow of coolant fluid through the second outlet.

A system includes an engine defining a water jacket fluidly coupled to a heat exchanger. An exhaust manifold defines an exhaust manifold cooling passage. A pump is fluidly coupled to the water jacket, and to each of the heat exchanger and the exhaust manifold cooling passage. An engine cooling circuit includes the water jacket, the heat exchanger, and the pump. An exhaust cooling circuit is selectively fluidly coupled to the engine cooling circuit. The exhaust cooling circuit includes the water jacket, the exhaust manifold cooling passage, and the pump. A control valve includes an inlet fluidly coupled to a first portion of the water jacket. A first outlet is fluidly coupled to a second portion of the water jacket. A second outlet is fluidly coupled to the exhaust cooling circuit. The control valve is structured to selectively control flow of coolant fluid through the second outlet.

A jet for lubricating a piece of a turbomachine for an aircraft such as an airplane, including a circulation duct for flowing a pressurised fluid, includes a first duct chamber, a second duct chamber, a first nozzle for passing between the first duct chamber and the second duct chamber, the first nozzle having a fixed minimum passage cross-section, and a second nozzle for passing from the second chamber to the outlet port formed by the second nozzle, the second nozzle including a fixed minimum passage cross-section. The ratio of the cross-section of the first nozzle to the cross-section of the second nozzle is between 0.16 and 3.61.

A jet for lubricating a piece of a turbomachine for an aircraft such as an airplane, including a circulation duct for flowing a pressurised fluid, includes a first duct chamber, a second duct chamber, a first nozzle for passing between the first duct chamber and the second duct chamber, the first nozzle having a fixed minimum passage cross-section, and a second nozzle for passing from the second chamber to the outlet port formed by the second nozzle, the second nozzle including a fixed minimum passage cross-section. The ratio of the cross-section of the first nozzle to the cross-section of the second nozzle is between 0.16 and 3.61.

An aftertreatment system includes a first dosing module, a second dosing module, and a reductant tank assembly. The reductant tank assembly includes a reductant tank, a header coupled to the reductant tank, and a first splitting device that splits a first flow from the header into a first inlet flow and a second inlet flow. A first inlet line and a second inlet line direct the first inlet flow and the second inlet flow to the first dosing module and the second dosing module. A first outlet line and a second outlet line direct a first outlet flow and a second outlet flow from the first dosing module and the second dosing module to a second splitting device. The second splitting device merges the first outlet flow and the second outlet flow into a second flow and provides the second flow to the header.

An expansion tank for a vehicle with dual cooling lines includes a first chamber with a first fluid pressure, wherein the expansion tank includes a first fluid connector in fluid connection with the first chamber for connection to a first cooling line, a second chamber with a second fluid pressure, wherein the expansion tank includes a second fluid connector in fluid connection with the second chamber for connection to a second cooling line, wherein the first chamber and the second chamber are in fluid connection via a pressure actuated two-way valve that acts as a one-way valve open in the direction towards the second chamber at differential pressures between the second fluid pressure and the first fluid pressure below a first predetermined differential pressure threshold and opens also in the direction towards the first chamber at differential pressures above the first predetermined differential pressure threshold.

An improved blow-by gas return structure minimizes the occurrence of a drawback caused by freezing at a low temperature by bringing a state where freezing minimally occurs in a blow-bay gas passage such as a pipe disposed outside an engine. The blow-by gas return structure is configured such that a blow-by gas is introduced into an intake manifold through an inner passage formed in a head cover. The blow-by gas return structure includes an outer pipe which connects a blow-by gas outlet of the head cover and a blow-by gas inlet of a main pipe of the intake manifold in a communicable manner, and a temperature elevating mechanism configured to elevate a temperature of the blow-by gas inlet. The temperature elevating mechanism is configured such that a cooling water transfer passage is formed in a portion of the blow-by gas inlet of the main pipe.