106results about How to "Increase oil pressure" patented technology

The present invention provides a system and method for controlling clutch engagement in a hybrid vehicle, in which an appropriate clutch engagement mode is selected based on vehicle state, and the like, and a speed difference between both sections of a clutch and a torque transmitted to the vehicle during the clutch engagement process are controlled by reflecting a parameter changed by the clutch engagement mode, thus improving acceleration performance and driving performance, reducing engagement impact, and simply providing various clutch engagement modes.

The invention provides polymer microspheres for high temperature hypersalinity reservoir deep profile control and a preparation method thereof. In the method, based on the method that photopolymerization is used to prepare the polymer microspheres, heat and salt resistance polymer materials such as sodium 3-acryloylamino-3-methyl butyrate, 2-acryloylamino-2-methylpropane sulfonic acid, acrylamide monomer and the like and water-soluble anionic monomer are adopted and dispersant and cross-linking agent are added as so to form oil-water mixed emulsion in the mixed medium of surfactant and solvent; then initiator is decomposed by ultraviolet through photopolymerization under controllable temperature so as to initiate emulsion polymerization and 50-500nm of microspheres are formed. The invention utilizes the ability of microspheres that microspheres can be dispersed in arbitrary concentration and injected in the water and can gradually swell after entering in depth of the formation to plug the pore throat so as to effectively plug the high permeable strip of the formation, expand the water swept volume, significantly increase crude oil recovery of water flooding reservoir and is applicable to high temperature hypersalinity reservoir deep profile control.

A lubrication system for an internal combustion engine having a pressure regulator to optimize oil flow through an engine to increase engine efficiency. The lubrication system includes an engine driven oil pump connected to supply pressurized oil through a main oil feed to a main bearing gallery, a cam gallery and a hydraulically actuated device such as a cam phaser or switching valve lifters. A pressure regulator connected between the main oil feed and the galleries selectively restricts oil flow to the galleries to raise oil pressure supplied to the hydraulically actuated device. The increased oil pressure to the cam phaser allows the engine to use a smaller oil pump and thereby increase engine efficiency while providing for actuation of the cam phaser over the full engine speed range. The increased oil pressure to the switching lifters allows the engine to reduce valve lift or disable cylinders over the full engine speed range.

A variable displacement pump includes an urging mechanism to urge a cam ring in an eccentric direction and to increase the urging force when an eccentricity is decreased, a first control chamber to apply a force to the cam ring in a direction decreasing the eccentricity, and a second control chamber to apply a force, to the cam ring, in a direction increasing the eccentricity. The variable displacement pump further includes a thermosensitive mechanism to control the supply and drain of a discharge pressure supplied into the second control chamber, and a control valve to be operated by the discharge pressure and to decrease the pressure in the second control chamber when the discharge pressure increases.

The present invention provides a large-tonnage forklift truck, that is, the functions of the loader and the large-tonnage forklift are combined into one, and the boom of the original loader is shortened, thereby changing the fulcrum of the lifting cylinder on the boom, so that The active force arm on the swing arm becomes longer and the transmission force arm becomes shorter; and the rotating shaft set on the rocker arm is moved down to make the active force arm on the rocker arm longer and the transmission force arm shorter; lower the lifting cylinder in The connection point on the front frame makes the angle between it and the front frame smaller and has stronger thrust; and the diameter of the lifting cylinder is increased to increase the oil pressure of the lifting cylinder to increase the weight of the fork. The present invention combines the operating functions of large-tonnage forklifts and loaders, through the comprehensive integration of machinery, electrical appliances, and hydraulic pressure, and at the same time has the advantages of flexibility and off-road performance of loaders, and the advantages of large loading capacity of large-tonnage forklifts, and reduces fuel consumption. Relatively small, it can load and unload 25 tons of stone blocks, and can lift the goods to a height of more than 3200mm.

The invention relates to a lubricating oil passage of an engine cylinder body assembly, which adopts an arrangement mode comprising an oil collector, an oil pump, an oil pump outlet pipe, an oil cooler, an oil filter, a main oil passage, an inclined oil passage, a cylinder cover oil passage, a pressure feedback oil passage and other auxiliary oil passages. The arrangement mode has the following characteristics: (1) the arrangement difficulty of the oil passages of a cylinder body is effectively reduced by using the oil pump outlet pipe; (2) the oil filter and the oil cooler adopt a modular design; (3) two oil passages arranged on the cylinder body are led to the cylinder cover, thereby reducing the pressure drop and improving the pressure response speed; and (4) the pressure feedback oil passage of oil is arranged so that the oil pump can adjust the trans-emission amount in time according to the pressure of the main oil passage.

A hydraulic control apparatus includes two oil flow control valves (30, 32) each provided with a supply control portion (36, 38, 52, 54) for controlling an oil supply from a pressurized oil source, and a discharge control portion (40, 42, 56, 58) for controlling connection with a discharge passage. One of those oil flow control valves supplies/discharges oil to/from one of hydraulic chambers (22, 24) that are oppositely formed in a hydraulic servo mechanism. An operation direction of the hydraulic servo mechanism is performed by operating one of the oil flow control valves. The other operation direction of the hydraulic servo mechansim is performed by operating the other oil flow control valve.

An oil level management system for a vehicle has an oil pan configured to contain oil and to be mountable to an engine block with a baffle extending transverse to the axis of rotation of the engine crankshaft when the oil pan is so mounted. The baffle is configured to partially define a first oil reservoir and a second oil reservoir, as well as an oil flow opening such that the oil reservoirs are in fluid communication with one another and are characterized by respective first and second oil levels within the pan. The second reservoir drains to the first reservoir when the engine is running and when the engine block and crankshaft are positioned on the vehicle with the axis of rotation tilted from horizontal. The first oil level is lower than the second oil level to avoid oil contact with the crankshaft.

The invention provides a preparation method of a micro emulsion polymer for displacement control of an oil deposit deep part with high temperature and mineralization. The preparation method comprises the following steps of: on the basis of preparing the micro emulsion polymer by adopting a photopolymerication, adding 3-acrylamide group-3-methyl sodium butyrate, 2-acrylamide group-2-methyl propanesulfonic acid and other temperature-resistant salt-resisting materials and water-soluble anion monomers into a water solution containing acrylamide monomers; adding a dispersion agent; forming a water-oil mixed emulsion in a mixed medium of a surfactant and a solvent; and decomposing an initiator to initiate the emulsion for polymerizing to form the micro emulsion polymer by using a photopolymerication mode under the action of controllable temperature. By utilizing the capability of the micro emulsion polymer dispersed into injected water at any concentration, entering a stratum deep part and forming jelly under the action of the cross linking to block a pore throat to effectively block a high-permeation stripe of the stratum, the invention enlarges the swept volume of water, remarkably improves the crude oil recovery ratio for developing the oil deposit driven by water, and is applied to deep part profile control of the oil deposit with high temperature and mineralization.

The invention discloses a simply-supported slab bridge jack-up method and a height-adjustable combined cushion structure applied therein. The simply-supported bridge jack-up method includes: firstly, setting up distributive girders under a girder, arranging jacks and putting up temporary supports, and then entirely synchronously jacking up a simply-supported slab to the height 1-3mm higher than design elevation; preliminarily supporting the bridge by the aid of the height-adjustable combined cushion structure and supports prior to performing zero-clearance girder falling to the designed elevation, and then demounting the jacks and the temporary supports. The height-adjustable combined cushion structure comprises a precast portion composed of precast supports and a height-adjustment combined mechanism capable of adjusting the height of the precast supports and a cast-in-situ portion coating a height-adjustable mechanism and part of the precast supports. The simply-supported slab bridge jack-up method and the height-adjustable combined cushion structure applied therein have the advantages of high applicability, controllable security, high construction precision, high operability, high economical efficiency, good application prospect and the like, thereby being capable of being used in support replacement projects of expressways and the bridges of urban roads and especially applicable to jack-up engineering when jack-up height of a sole-across simply-supported girder (slab) is larger than the stroke of one jack.

An oil pump structure including: an oil pump having a first hydraulic control chamber and a second hydraulic control chamber; a hydraulic control valve having a valve operating oil passage, a first inflow passage, a second inflow passage, a first outflow passage, a second outflow passage and a drain flow passage; and an oil circuit, wherein the hydraulic control valve is connected to a branching flow passage of the oil circuit; a spool valve body of the hydraulic control valve has a front valve section, a rear valve section and an intermediate valve section, which are formed perpendicularly to the axial direction of a connecting shaft; an axial-direction dimension of the intermediate valve section is larger than an axial-direction dimension of the second outflow passage; the second outflow passage and the drain flow passage are both accommodated temporarily between the intermediate valve section and the front valve section due to movement of the spool valve body; and in the hydraulic control valve, a control hydraulic pressure is applied at all times to the first hydraulic control chamber, and the control hydraulic pressure is increased and decreased in the second hydraulic control chamber.

The invention relates to a buffer valve used in a hydraulic system of a crane. While the crane in a hanging state falls, large-flow oil pressure can be diverted effectively; and after short-time buffer, the buffer valve closes automatically, thus the rotation speed of a motor can be adjusted accurately along with the oil pressure. The buffer valve is composed of a shell, a top cover and a valve plug installed in the shell; the valve plug comprises a slide valve, a valve seat, a spring and an inner plug; the end socket of the slide valve is provided with a wedge-shaped hole; the wedge-shaped hole is communicated with a flow guide hole on the side wall of the valve seat; the inner plug is internally provided with a check valve; the side wall of the inner plug is provided with a damping hole; when oil applied with high pressure enters an oil cavity between the slide valve and the top cover slowly through a damping hole, the slide valve is pushed to slide downward in the valve seat, and the buffer valve is closed gradually; and when a hanged object falls off the ground, the oil pressure of an oil duct decreases, the oil in the oil cavity is extracted rapidly from the inner plug, and the buffer valve restores to the open state automatically.

Shift valves 141, 142, 143 are provided to switch oil passage connections to a state in which an oil pressure in one hydraulic clutch of an arbitrary speed transmission train and an oil pressure in a hydraulic clutch of a transmission train which is adjacent thereto as seen in the order of speed are controllable by a pair of linear solenoid valves 201, 202. Skipped speed change from a predetermined first speed transmission train to a second speed transmission train which is not adjacent to the first speed transmission train is made possible. In concrete, a large-capacity accumulator A5 is connected to an oil passage L19 which is in communication with 5th-speed hydraulic clutch C5. At the time of skipped speed changing from 5th speed to 3rd speed, shift valves 141, 142, 143 are switched to a state of 3rd-4th speed change. The oil pressures in the hydraulic clutches C3, C4 for 3rd and 4th speed transmission trains, respectively, are made controllable by the linear solenoid valves 201, 202. While buffering the pressure decrease of the oil pressure in the 5th-speed hydraulic clutch C5 by the accumulator A5, pressure increase control of 3rd-speed clutch C3 is carried out by one of the linear solenoid valves to thereby skip-downshift from 5th to 3rd speed. The other linear solenoid valve is held at a low-pressure waiting state to prepare itself for the 3rd-4th speed switch-upshifting.

A transmission for a vehicle is provided which prevents generation of a speed change shock at the time of starting the vehicle from a neutral condition. In the transmission, hydraulic clutches are each put into a connected state according to an action of an oil pressure, and a plurality of selectively engageable speed-stage gear trains are provided so that a neutral condition can be obtained. At the time of shifting from the neutral condition, where the oil pressures in hydraulic clutches are in a lowered state, to a starting condition in which a starting gear train is engaged, pressure in the hydraulic clutch corresponding to the starting gear train is controlled by a control valve, so that the oil pressure in the hydraulic clutch is maintained in the lowered state during and immediately after a shifting operation, and is subsequently increased in response to complete engagement of the starting gear train.

Provided is a highly reactive fluid fan clutch device excellent in reaction speed of fan rotation to a control signal even with a weak centrifugal force during low fan rotation. The device of an external control type includes: an annular oil reserving chamber provided in a case that is supported by a rotary shaft having a drive disk fixed thereto; and a valve member for opening and closing an oil circulating flow passage hole of the annular oil reserving chamber by an electromagnet, wherein an effective oil contact area at a torque transmission gap formed between a drive side and a driven side is increased and decreased to control rotation torque transmission from the drive side to the driven side, and an inner wall eccentric to an outer wall of the annular oil reserving chamber is provided in the annular oil reserving chamber.

The invention provides an overflow preventing device for rubber forming processing, and relates to the technical field of rubber forming processing equipment. The overflow preventing device for rubberforming processing comprises a base. Side plates are fixedly arranged on the two sides of the top of the base. A top plate is fixedly arranged on the tops of the side plates. An installing plate is fixedly arranged on the top of the base and provided with a groove. A bottom plate is fixedly arranged at the bottom of the groove. A lower template and upper saw type blocks are fixedly arranged on the top of the bottom plate. Arc grooves are formed in the top of the bottom plate. According to the overflow preventing device for rubber forming processing, through cooperation of hydraulic cylinders,piston rods, the lower template and a concave groove, the oil pressure in the hydraulic cylinders is increased, the piston rods move downwards, an upper template is driven to move downwards, and after the lower template and the upper template are in complete contact, a convex block on the upper template and the concave groove in the lower template are clamped, and it can be guaranteed that in theliquid rubber injection process, the liquid rubber is not likely to overflow from the peripheries of the templates.

The invention relates to a rotary vane high-pressure steering engine, mainly comprising a revolving shaft, a stator plate, a moving plate, a cylinder body, an upper cover and a lower cover. The revolving shaft is a coil typed revolving shaft with round end faces respectively arranged at the two ends, the cylinder body is sheathed on the round end faces of the coil typed revolving shaft, a sealing ring is arranged between the round end faces of the coil typed revolving shaft and the cylinder body, the moving plate is fixed between the revolving shaft and the two round end faces through a sealing ring of the moving plate by bolts, the stator plate is fixed on the inner wall of the cylinder body of the adjacent moving plates through a sealing ring of the stator plate by bolts, oil holes respectively arranged on the two sides of the stator plate are communicated with an oil supply hole and an oil return hole of the cylinder body, and the upper cover and the lower cover are arranged at the two ends of the coil typed revolving shaft through a shaft housing and fixed at the two end faces of the cylinder body by bolts. The invention has the advantages that rudder pushing is smooth, volume is small, axial force does not exist, a cylinder cover does not bear the oil pressure, high-pressure oil can be used for working, maintenance is convenient, and a double steering engine or a multi-stage steering engine can be combined conveniently, and the invention is applicable to large, medium and small-sized ships.

A piston for an internal combustion engine has a piston head and a piston skirt. The piston head has a circumferential ring belt and a circumferential cooling channel. The piston skirt has a working surface assigned to its major thrust side and to its minor thrust side. A bore that proceeds from the cooling channel is provided, which ends in the working surface assigned to the major thrust side, and is disposed at an incline, in such a manner that the bore exit encloses an acute angle (α) with the center axis (M) of the piston. An opening is formed in the working surface, and a deflection surface inclined relative to the working surface is provided between the bore and the bore exit. The working surface assigned to the major thrust side has a depression which forms at least one oil capture region above the opening.

The invention relates to a lubricating oil return mode of a supercharger of a turbocharged engine, and aims to lubricate the supercharger. An oil return channel A which accords with the cold operating condition of an engine, an oil return channel B which accords with the normal operating condition of the engine, oil return channels C and D which accord with the operating condition of the engine in high temperature environment, and a supercharger oil return control valve are arranged on a cylinder body of the engine, so that oil return lines of lubricating oil in the supercharger of the engine in different operating states are cyclically switched. The operating efficiency of the engine is improved; the high temperature characteristic of the lubricating oil in the supercharger is reasonably utilized, so that the heat balance of the engine is realized; and meanwhile, the oil return performance of the supercharger of the engine is improved, the probability that the oil in the supercharger leaks is reduced, and the power performance and economy of the engine are effectively improved.

A vehicle braking apparatus that can exert high braking performance during vehicle braking is implemented by a control mode that can be realized in a braking apparatus. In controlling the braking apparatus of a vehicle, a climb rate of a wheel cylinder braking oil pressure is decreased smaller than a climb rate corresponding to a climb rate of a master cylinder oil pressure from a time point at which the wheel cylinder braking oil pressure reaches a predetermined threshold value. The time point at which the wheel cylinder braking oil pressure reaches the predetermined threshold value is estimated based on the climb process of the master cylinder oil pressure or directly detected.

A method of increasing oil pressure in a heavy duty truck engine lubricating system is provided. The lubricating system comprises an oil pressure regulating assembly mounted in an oil filter base and having a main spring to regulate oil pressure, and a high pressure relief valve assembly mounted in the oil filter base and having a peak clipping spring to relieve oil pressure when the pressure exceeds a specified limit. The method includes the steps of replacing the main spring with a replacement main spring having a higher spring constant and replacing the peak clipping spring with a replacement peak clipping spring having a higher spring constant. A replacement kit for increasing oil pressure is also provided.

The invention provides a single-motor and hydraulic-clutch driven horizontal well crawl device comprising a shell, a power mechanism, a travelling mechanism, a clutch mechanism and a hydraulic mechanism. The shell contains the power mechanism, the travelling mechanism, the clutch mechanism and the hydraulic mechanism. The power mechanism comprises a motor and a transmission shaft driven by the motor, the travelling mechanism comprises an opening and closing assembly and two traction assemblies, and each traction assembly comprises a connecting rod, a supporting arm and an idler wheel. The opening and closing assembly drives the two supporting arms through the connecting rods to be closed up towards the center or expanded towards the two opposite sides, and the idler wheels move out of theshell when the two supporting arms are expanded. The clutch mechanism comprises two oppositely-arranged matched tooth discs, and one matched tooth disc is fixed to a transmission shaft. The hydraulicmechanism comprises a hydraulic pump, a clutch hydraulic cylinder, an opening and closing hydraulic cylinder, an energy storage, a control valve and a hydraulic pipeline. The other matched tooth discof the clutch mechanism is fixed to the hydraulic pump, the clutch hydraulic cylinder comprises a first cylinder body and a first piston rod, and the opening and closing hydraulic cylinder comprises asecond cylinder body and a second piston rod.