A multi-chamber blowoff valve is provided for releasing excess air pressure from a duct system associated with a vehicle. The blowoff valve has a valve housing, an engine-air interface, and a multiple piston assembly. The valve housing is configured to secure to the duct system at a duct-air interface. The engine-air interface is configured to allow air in and out of the valve housing. The multiple piston assembly is disposed within the valve housing and includes an upper piston and a lower piston that move in unison. The multiple piston assembly is configured to be in a closed position while a pressure differential is above a certain threshold and to be in an open position while the pressure differential is below said certain threshold. While in the open position, a portion of the air in the duct system is released.

The present teachings provide for a flow restrictor for a coolant line of an internal combustion engine coolant system. The flow restrictor can include a restrictor element and a biasing member. The restrictor element can include a restrictor plate and a tab non-rotatably coupled at an angle. The biasing member can rotationally bias the restricting element to a first position where the restricting plate is substantially parallel to the flow of fluid. The tab can be configured to create a torque on the restricting element to overcome the biasing member and rotate the restricting plate to block a portion of the fluid flow path when the flow exceeds a predetermined flow rate.

The present teachings provide for a flow restrictor for a coolant line of an internal combustion engine coolant system. The flow restrictor can include a restrictor element and a biasing member. The restrictor element can include a restrictor plate and a tab non-rotatably coupled at an angle. The biasing member can rotationally bias the restricting element to a first position where the restricting plate is substantially parallel to the flow of fluid. The tab can be configured to create a torque on the restricting element to overcome the biasing member and rotate the restricting plate to block a portion of the fluid flow path when the flow exceeds a predetermined flow rate.

A low pressure regulator for a high pressure fuel pump includes a standard damping orifice, providing a constant level of piston movement damping by enabling a fluid pathway between a spring chamber and a return line. The low pressure regulator also includes a further damping orifice, which is covered by the piston when discharge port holes are open, the further damping orifice providing a further, variable level of piston movement damping by providing a further fluid pathway between the spring chamber and return line. The further damping orifice is open in a hydraulic accumulator mode and closed in a regulator mode, thereby reducing pressure spikes caused by insufficient spring chamber filling.

In a high-pressure pump, a relief valve main body has a rod shape. A relief valve seat portion is integrated with an end of a relief valve main body so as to be capable of contacting a relief valve seat. The relief valve main body is inserted into a guide hole portion of a support portion. The guide hole portion slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve main body in the axial direction. A fuel guide portion is provided at an end portion of the relief valve main body facing the pressurizing chamber and can guide a flow of the fuel in a direction radially outward of the relief valve main body on the way from the pressurizing chamber toward the valve seat portion.

An air removal assembly can include an air valve mountable on a fluid system; and a throttling device in fluid communication with the air valve, the throttle device further in fluid communication with the fluid system through the air valve when the air valve is mounted on the fluid system, the throttling device including: a body having an inner and outer surface, the inner surface defining a body cavity, the inner and outer surfaces defining a plurality of body orifices in fluid communication through the body cavity; a throttle movably positioned within the body cavity proximate to a first orifice of the plurality of orifices, the throttle movable to a closed position closing the first orifice and to an open position opening a fluid pathway between the first orifice and the body cavity; and a biasing element biasing the throttle to a partially-open position between the closed and open positions.

An air removal assembly can include an air valve mountable on a fluid system; and a throttling device in fluid communication with the air valve, the throttle device further in fluid communication with the fluid system through the air valve when the air valve is mounted on the fluid system, the throttling device including: a body having an inner and outer surface, the inner surface defining a body cavity, the inner and outer surfaces defining a plurality of body orifices in fluid communication through the body cavity; a throttle movably positioned within the body cavity proximate to a first orifice of the plurality of orifices, the throttle movable to a closed position closing the first orifice and to an open position opening a fluid pathway between the first orifice and the body cavity; and a biasing element biasing the throttle to a partially-open position between the closed and open positions.

Embodiments provide systems and methods for releasing grey water from an aircraft sink or sump using an improved waste water air stop valve. The valves described herein allow drainage of waste water, without air leakage. Additionally, if drainage in the piping is blocked, the valves are designed to ensure that water cannot flow back into the sinks or sumps.

A throttling device comprising: a body having an inner surface and an outer surface, the inner surface defining a body cavity, the inner surface and the outer surface defining a plurality of body orifices in fluid communication through the body cavity; a throttle movably positioned within the body cavity proximate to a first orifice of the plurality of body orifices, the throttle movable to a closed position closing the first orifice and to an open position opening a fluid pathway between the first orifice and the body cavity; and a biasing element biasing the throttle to a partially-open position between the closed position and the open position.

An aircraft turbine engine assembly, including a lubricating oil circuit and a fuel supply device, the assembly also including a passive bypass valve enabling the oil to bypass an exchanger, the valve including a valve body and a piston arranged to move in a sliding space defining a first actuating chamber supplied with oil from the oil circuit, as well as a second actuating chamber supplied with fuel from the device, the valve being configured so that when the differential pressure between the oil pressure in the first actuating chamber and the fuel pressure in the second actuating chamber drops below a predetermined value of differential pressure, the piston moves from a normal operating position to an exchanger bypass position.