7 results about "Vapor lock" patented technology

To prevent vapor lock in a high-pressure fuel pump delivering LPG in a liquid-phase to fuel injectors that inject liquid-phase LPG into the combustion chamber of an internal combustion engine, a fuel system is configured to generate a continuous flow of LPG through the low-pressure side of the high-pressure fuel pump, with a return connection positioned to preferentially direct gaseous-phase LPG back to the fuel tank. A regulating valve in the return line maintains a predetermined fuel pressure at the inlet side of the high-pressure pump, which reduces fuel vaporization issues within the high-pressure pump.

This invention provides an internal combustion engine that can suppress blockage of the oil inflow path caused by emulsions drawn into the filter and vapor lock caused by air drawn into the filter. In the internal combustion engine of this invention, the distance between the first intake port in the vertical direction and the lowest part of the oil pan is greater than the distance between the second intake port in the vertical direction and the lowest part. The valve position of the flow path switching valve can be switched between a first position and a second position. The first position is a position that connects the first intake port to the oil pump and disconnects the second intake port from the oil pump. The second position is a position that disconnects the first intake port from the oil pump and connects the second intake port to the oil pump. The control device switches the valve position to the first position (S11-S12) when the oil pump starts operating, and switches the valve position to the second position (S13-S14) after the internal combustion engine preheating is completed.

The utility model discloses an anti-steam-locking drainage system for a hollow shaft of a disc type drying machine, which relates to the technical field of sewage treatment and comprises the hollow shaft, a body jacket, a siphon, a steam-water separator, a steam pipeline, a first drain valve, a second drain valve, a first air inlet pipeline and a second air inlet pipeline. Through the arrangement of the siphon, the steam-water separator, the first air inlet pipeline and the second air inlet pipeline, a mixture of condensate water and steam in the hollow shaft can be discharged into the steam-water separator to be separated, and the separated condensate water can be directly discharged through the first drain valve; compared with a steam lock breaking scheme that a hole is formed in a drain valve body and an air exhaust valve is additionally arranged or the air exhaust valve is arranged in the drain valve to keep a certain leakage rate, the steam lock breaking device has the advantages that the drain efficiency of the drain valve can be improved, and the service life of the drain valve is prolonged. A large amount of steam energy is saved.

The utility model provides a bypass formula lever trap belongs to valve technical field. It has solved existing bypass formula lever trap to remove steam lock structure complex etc. technical problem. This bypass formula lever trap includes valve body, floating element and lever, the valve body is installed with the valve core that communicates valve cavity and outlet channel, the lever is hinged in the valve body, the lever is connected with floating element, the lever is fixed with the valve plug that can seal valve core inner end, the valve body is firmly connected with the connecting seat, the connecting seat is equipped with the jackscrew, the jackscrew can move along the axial direction relative to the connecting seat, the inner end of jackscrew is aligned with valve core, when the jackscrew moves inwards, the inner end of jackscrew can pass through valve core and push the valve plug away from the position of sealing valve core inner end. The utility model has the advantages of can remove steam lock, simple structure, safe operation and no risk.

A cryogenic pump assembly comprising a centrifugal pump and an electric induction motor especially configured for transporting liquid hydrogen (LH2) from cryogenic LH2 storage tanks to various applications having a horizontal configuration that includes an offset discharge to prevent vapor lock. An integrated vacuum jacketed housing enclosing portions of the centrifugal pump and electric induction motor may be utilized to prevent heat loss, while another embodiment utilizes LH2 flowing through the electric induction motor to lubricate bearings as well as cooling the electric induction motor. The centrifugal pump may be either single-stage or multi-stage, wherein each stage unit comprises an impeller and diffuser connected to a diffuser housing. The pump and motor share a single motor / pump shaft. Another embodiment is the cryogenic pump assembly vertically submerged in a cryogenic LH2 storage tank or vertically submerged in a sump container attached either externally or internally to a cryogenic LH2 storage tank.

To prevent vapor lock in a high-pressure fuel pump delivering LPG in a liquid-phase to fuel injectors that inject liquid-phase LPG into the combustion chamber of an internal combustion engine, a fuel system is configured to generate a continuous flow of LPG through the low-pressure side of the high-pressure fuel pump, with a return connection positioned to preferentially direct gaseous-phase LPG back to the fuel tank. A regulating valve in the return line maintains a predetermined fuel pressure at the inlet side of the high-pressure pump, which reduces fuel vaporization issues within the high-pressure pump.