68 results about "Flow augmentation" patented technology

The invention provides a method for augmenting circulation in a patient having carotid stenosis. An elongate tubular member is provided having a lumen communicating with a port at a distal end. The tubular member is inserted into a peripheral artery and the distal port is advanced into a first carotid artery substantially free of a lesion where the patient possesses a second carotid artery substantially occluded by a lesion. Blood is perfused into the first carotid artery through the tubular member. Contralateral flow is augmented to improve perfusion to an ischemic region distal to the carotid stenosis. Angioplasty and stenting can be used to open the lesion in the second carotid artery.

The forming apparatus of the present invention preferably includes an orifice on top of the trough. The uniquely shaped orifice substitutes for the weirs as the controlling entity for glass thickness. The orifice is designed such that as it deforms, it maintains a linear flow characteristic with respect to its length. As the orifice is made larger by the applied stress, the percentage width increase is the same over its length and consequently the percentage flow increase is the same over the length of the orifice. In another embodiment, the present invention provides an adjustment to change the flow characteristics of the trough to compensate for the degradation of the forming trough during an extended production run. A flow control plug can be inserted into the trough, such that flow dynamics can be altered during hot operation by insertion, removal or position adjustment of the flow control plug.

A fluid-cooled computer system includes a plurality of heat-generating components and a cooling system configured for supplying a cooling fluid at a controlled cooling fluid flow rate to cool the heat-generating components. A temperature-based cooling control circuit includes a temperature sensor configured for sensing a temperature of the heat-generating components and control logic for increasing a cooling fluid flow rate in response to the temperature exceeding a temperature threshold. A power-based cooling control circuit is configured for identifying and quantifying an increasing power consumption trend over a target time interval and, during a period that the temperature of the electronic device does not exceed the temperature threshold, increasing a cooling fluid flow rate to the electronic device in response to the magnitude of the increasing power consumption trend exceeding a power threshold. In one option, the fluid-cooled computer system is a server and the heat-generating components include a processor.

An oxidation catalyst is disposed upstream of a diesel particulate filter (DPF) in an exhaust passage of a diesel engine. An electronic control unit (ECU) operates temperature increasing circuit to combust and eliminate particulate matters deposited on the DPF. The ECU determines execution and stoppage of regeneration of the DPF based on a quantity of the particulate matters deposited on the DPF. The ECU increases an exhaust gas recirculation quantity (EGR quantity) during the regeneration to reduce an intake air quantity from the intake air quantity in a non-regeneration period and to achieve a flow rate of the exhaust gas passing through the DPF suitable for the temperature increase. The ECU corrects a valve opening degree of an EGR control valve based on the sensed intake air quantity to reduce a variation in the exhaust gas flow rate.

A system allows a user to manually manipulate fuel flow to a gas turbine engine during a loss of power to the fuel supply system fuel metering unit. The fuel metering unit includes a fuel metering valve, a metering valve actuator, a fail-fixed valve, a flow increase valve, and a flow decrease valve. The fuel metering unit is configured such that, upon electrical power interruption to the metering valve actuator, the fail-fixed valve shifts and provides a hydraulic lock on the fuel metering valve, to thereby maintain its position. The flow increase and flow decrease valves are powered from a power source that is independent of that used to power the fuel metering unit and, when appropriately energized will allow movement of the fuel metering valve.

An air-conditioning device includes a pump for sending a thermal medium, a thermoelectric conversion unit for absorbing heat from the thermal medium, a target setting unit for setting a target cooling value, and a controlling unit. The controlling unit increases a flow amount of the thermal medium to be larger than a predetermined amount and stops the thermoelectric conversion unit from absorbing heat, when the target cooling value is smaller than a predetermined value. The controlling unit increases a heat-absorbing amount of the element and keeps the flow amount of the thermal medium to be larger than the predetermined amount, when the target cooling value is equal to or larger than the predetermined value.

The invention discloses a water level prediction analysis and control method of a hydropower station reservoir, comprising the following steps: 1) acquiring real-time operation information of a cascade hydropower station group; 2) calculating the change amount of the water storage flow in the reservoir; 3) analyzing and predicting that trend of the reservoir water level, and drawing a water levelchange trend map; 4) calculating the suggested open degree of the gate adjustment, and automatically adjusting the opening degree of the gate; 5) when the gate adjustment needs to increase the discharge, automatically communicating the automatic linkage flood release warning system to send the flood release warning information to the person in charge of the downstream flood control in a timely manner. The invention can accurately predict the short-term change trend of the water level of the reservoir of the hydropower station, and further adjust the gate so as to reduce the operation frequencyof the gate, improve the gate adjustment precision and realize the purpose of maximizing the utilization of water resources for generating electricity. At the same time, when the discharge of the gate is increased, the flood release warning information can be transmitted in time through communication with the flood release warning system, so as to ensure the safety of the life and property of people in the downstream.

An ECU calculates a foreign-matter accumulation index base on a total flow rate of EGR gas integrated since the previous execution of a last foreign-matter removal operation until the present execution of the foreign-matter removal operation. The ECU controls an actuator for operating an EGR valve and a number of the actuations of the EGR valve on the basis of the foreign-matter accumulation index. When the total flow rate of the EGR gas increases, the quantity of foreign matters contained in EGR gas correspondingly increases. Therefore, as the foreign-matter accumulation index becomes larger, the actuation intensity of the EGR valve is set higher and the number of the actuations of the EGR valve is set larger. As a result, the removal operation of foreign matters can be efficiently executed in accordance with the deposition intensity or the deposition quantity of foreign matters.

A method for controlling rock drilling and a rock drilling arrangement having at least one feed channel of a feed actuator provided with a restrictor, which causes a pressure drop if the penetration rate increases and, consequently, a flow through the restrictor increases. A pressure difference and an increase in the penetration rate can be detected by sensing the pressure before the restrictor and after the restrictor. When the feed rate increases, a hydraulic system is arranged to decrease percussion pressure.

An exhaust sound controlling method including reducing a flow rate of exhaust gas that passes through an exhaust path, to a first flow rate in accordance with increase in engine speed in a first engine speed region, and increasing the flow rate of exhaust gas to a second flow rate in accordance with increase in engine speed in a second engine speed region higher in engine speed than the first engine speed region. An exhaust sound controlling apparatus including a baffle plate and a valve that is operated to open a communication passage that communicates upstream and downstream sides of the baffle plate in an engine starting region, close the communication passage in an idling region and a low engine speed region, and open the communication passage and increase an opening of the valve as the engine speed rises in a high engine speed region.

A system allows for accurate manual application of a fluid material in a linear pattern to a surface from a container holding the fluid. The system may comprise a container holding a fluid, the container having an application end from which fluid is applied to the surface at a volume flow rate that provides a volume / linear distance of the linear pattern. There is a controllable pressure system that causes pressure in the container, wherein application of higher pressure causes increased flow of fluid from the container and reduction of pressure causes reduced flow of fluid from the container. Also present is a speed indicator that provides a signal of the relative speed between the application end and the surface. A microprocessor reads the signal and determines if the controllable pressure is at a predetermined target level with respect to the relative speed, the microprocessor adjusting the controllable pressure system to attempt to maintain a standard volume of liquid per linear distance of the linear pattern.

A hydraulic system for a transmission has a diffuser housing with a fluid inlet passage that feeds one or more pump inlet ports, and a fluid return passage, such as to return fluid from a pressure regulator valve, that is in fluid communication with the fluid inlet passage. The hydraulic system also has a filter housing with a filter outlet portion that is in fluid communication with the fluid inlet passage upstream of the pump inlet port(s). The fluid return passage is downstream of the filter outlet portion. Thus, flow through the fluid return passage can create suction, causing increased flow through the filter outlet portion, such as from a fluid sump. Specifically, the diffuser housing is configured so that the fluid inlet passage has a converging portion downstream of the filter outlet portion and a diverging portion downstream of the converging portion.

A high-performance propeller has one hub and a plurality of blades, characterized in that a double-side or a single-side arc brim is provided at the tip of each blade. The propeller of the invention can provide a small induced drag and convert the centrifugal force to the effective force so as is to increase the differential pressure near the tip of blades and thereby increase the acting force on blades. Under the condition of same power consumption, it has been tested for the large propeller in the type of lateral inclination that the amount of flow is increased about 12%˜17%, which is equivalent to save energy 40%˜70%. Since the fluid dynamic performance presents the aspect ratio approaching infinity, the width of the blades can be increased whereas the induced drag is not increased. Applying the method of increasing the area of the blades and decreasing the velocity of outflow fluid, the effect on saving of energy can be further improved greatly on the present basis.

A flow path switching valve is disclosed that can be operated remotely simply by turning flow on and off. A mid portion of the body has at least one passage therein leading from a central axial bore to one or more external ports each having a tractor nozzle. The valve outlet connects the axial bore to a cleaning nozzle. A poppet member is received in the central axial bore. In a first position, the poppet member directs fluid flow through the outlet to the cleaning nozzle connected to the outlet. The poppet member, when in a second position, closes the central axial bore through the outlet end of the valve body and permits fluid flow through the tractor nozzles. Selection of the different flow paths is made by simply reducing flow through the valve below a predetermined fluid flow threshold and then increasing the flow rate above the threshold.

A flow path switching valve is disclosed that can be operated remotely simply by turning flow on and off. A mid portion of the body has at least one passage therein leading from a central axial bore to one or more external ports each having a tractor nozzle. The valve outlet connects the axial bore to a cleaning nozzle. A poppet member is received in the central axial bore. In a first position, the poppet member directs fluid flow through the outlet to the cleaning nozzle connected to the outlet. The poppet member, when in a second position, closes the central axial bore through the outlet end of the valve body and permits fluid flow through the tractor nozzles. Selection of the different flow paths is made by simply reducing flow through the valve below a predetermined fluid flow threshold and then increasing the flow rate above the threshold.

The invention discloses a flow control method of a gas and electricity complimentary water heating system. The flow control method comprises the steps of detecting the flow of the hot water using end of a terminal, controlling the target temperature of a gas water heater to be reduced to be a predetermined gas heat temperature regulation value and controlling the target temperature of the gas water heater to be lower than the predetermined gas heat temperature regulation value when the flow increase value of the hot water using end of the terminal is within a predetermined flow change interval, decreasing the opening degree of a cold water valve and increasing the opening degree of a hot water valve, controlling the target temperature of the gas water heater to be improved to be a predetermined gas heat temperature regulation value and controlling the target temperature of the gas water heater to be higher than the predetermined gas heat temperature regulation value when the flow decrease value of the hot water using end of the terminal is within the predetermined flow change interval, increasing the opening degree of the cold water valve and decreasing the opening degree of the hot water valve. By means of the flow control method of the gas and electricity complimentary water heating system, constant-flow output can be achieved. The flow control method has the advantages of being high in accuracy, low in cost and the like.

A control system for an engine capable of operating on more than one type of fuel includes an engine control unit that determines a default fuel volume to be injected into the engine based on relevant engine parameters and characteristics of a default fuel type. A default mass fuel flow rate is derived from the default fuel volume and relevant engine parameters. The actual mass fuel flow rate into the engine is inferred from the mass air flow rate into the engine and the exhaust gas air-to-fuel ratio, which is determined using a wide range oxygen sensor. A fuel correction factor is calculated from the default mass fuel flow rate and the inferred mass fuel flow rate. The fuel correction factor is used to increment or decrement the default fuel volume in a subsequent fuel injection cycle thereby incrementing or decrementing the inferred mass fuel flow rate toward the default mass fuel flow rate.

With respect to a method of controlling a pump flow rate of a hydraulic pump, a method having a small flow rate command value is selected between a pressure feedback control for controlling the pump flow rate based on a set pressure (a cutoff pressure) and a pump pressure, and, an ordinary control for controlling the pump flow rate based on operation information, and in a case that the pressure feedback control is selected, a flow rate increasing control for increasing the flow rate command value after the case with the passage of time is performed.

If an engine undergoes high-load operations immediately after it is started up from its cold state, a thermostat is closed to inhibit passage of cooling water through the inside of the engine, and the cooling water stagnant in a cylinder head receives heat from a combustion chamber. Therefore, the cooling water will possibly boil. However, the thermostat is formed in such a manner that a valve body may be opened forcedly if the discharge flow rate of a water pump is greater than the flow rate in a normal use region. Therefore, in such a situation, the discharge flow rate of the water pump is increased greater than the flow rate in the normal use region to open the valve body with good response, thereby passing water into the engine quickly. This configuration prevents the cooling water stagnant in the cylinder head from boiling before the valve body is opened completely.

A cold / chilled water circulation system comprises a thermal source, an AHU, a pump, and a control section. The thermal source cools chilled water to a specified temperature. The AHU is an air conditioner that cools air by heat exchange with the chilled water. The pump feeds the chilled water having a flow rate corresponding to an operating frequency of a power inverter to the AHU from the thermal source. The control section calculates a degree of surplus, which indicates surplus capacity of the AHU to cool air, on the basis of information indicating the state of the AHU. The control section controls the operating frequency of the power inverter, to decrease the flow rate of the fed chilled water if the degree of surplus is not lower than the specified threshold, and to increase the flow rate if the degree of surplus is lower than the specified threshold.

A fuel cell system has a compressor delivering compressed gas to a fuel cell stack and a control valve affecting the flow of compressed gas. A load dump condition is determined for the fuel cell stack. The flow through the compressor is increased and the additional flow diverted away from the fuel cell stack by the control valve to provide additional load for the fuel cell stack. The fuel cell stack may then be operated at a higher output power for the purpose of generating more waste heat to more rapidly warm itself.

An impeller pump with thermostatically adjustable guide vanes is suitable for use as an automotive coolant pump. The pump is driven by a constant speed electric motor, and flow variation is controlled by varying the orientation of the vanes. Orientation of the vanes is effected by a wax-type thermostat, which senses coolant temperature: flow is increased when the coolant is hot, and decreased as the coolant cools. The variable guide vanes are mounted for pivoting about radial axes, and are located just upstream from the pump impeller.

The present disclosure provides an engine control device including: an adjustment section that adjusts a flow amount per unit time of exhaust gas from an engine; and a control section that, in a case in which a temperature below freezing point is detected by a temperature detection section that detects an external air temperature or an intake air temperature, a preceding engine operation duration is shorter than a first duration, and a value in a predetermined range in which water in an exhaust pipe can be drained by the flow amount being raised by a certain amount is detected by a value detection section that detects a value representing an acceleration, an accelerator opening or an engine rotation speed, controls the adjustment section so as to raise the flow amount by the certain amount until a second duration has passed from starting of the engine.

A system for providing pressurized hydraulic fluid includes an engine driven main pump and an electrical motor driven auxiliary pump. The auxiliary pump provides hydraulic fluid at line pressure to shift control subsystems during a vehicle launch while the main pump provides hydraulic fluid to cooler or lubrication subsystems during the vehicle launch. A pressure regulation valve regulates the pressure of the hydraulic fluid from the main pump. Once the main pump reaches a critical speed, the main pump provides hydraulic fluid at line pressure to the hydraulic control system and the auxiliary pump is turned off.

A method for compressing the working fluid during a water / steam combination process in multi-stage turbocompressors comprising intercooling in the individual compressor stages, by the addition of a coolant to the working fluid. The aim of the invention is to provide a technical solution, which is suitable for the efficient intercooling of the working fluid during multi-stage compression and thus for the highest possible reduction of the required compressor power. To achieve this, dispersed water, which is obtained by the pressure atomization of water to form micro-droplets, is used as the coolant. The coolant is added directly to the working fluid in at least one compression stage in a quantity that maintains the thermodynamic equilibrium, and is converted during compression into the state of the working fluid, the evaporation of the coolant takes place at the saturation line. The addition of coolant between the compressor entrance and the compressor exit permits the mass flow of the working fluid to be increased.

A system provides “fail fixed” functionality and allows a user to manually manipulate fuel flow to a gas turbine engine in the unlikely event the primary control means is unavailable. The fuel metering unit includes a fuel metering valve, a flow increase valve, and a flow decrease valve. The flow increase valve and flow decrease valves are both in fluid communication with the fuel metering valve and are each adapted to selectively receive fuel flow commands from a primary fuel flow command source and from a secondary fuel flow command source. The flow increase and decrease valves are responsive to the fuel flow commands to selectively control the position of the fuel metering valve.

A system provides “fail fixed” functionality and allows a user to manually manipulate fuel flow to a gas turbine engine in the unlikely event the primary control means is unavailable. The fuel metering unit includes a fuel metering valve, a flow increase valve, and a flow decrease valve. The flow increase valve and flow decrease valves are both in fluid communication with the fuel metering valve and are each adapted to selectively receive fuel flow commands from a primary fuel flow command source and from a secondary fuel flow command source. The flow increase and decrease valves are responsive to the fuel flow commands to selectively control the position of the fuel metering valve.

The present invention relates to a device for reducing the pressure and the velocity of a flowing fluid. According to the present invention, a cage has discs having through-holes which come into close contact with an outer surface of a plug. The discs are stacked in a direction of a central shaft of the cage. Flow passage portions are formed on the stacked discs, wherein the flow passage portions communicate with the outer surfaces of the discs and the inner surfaces which correspond to the through-holes so as to form flow passages between the stacked discs, and the direction of the flow passages changes to a circumferential direction and a vertical direction on the stacked discs. Additionally, the discs are stacked by applying one or more flow passage portion patterns based on the number of times the direction of the flow passages changes and the number of the flow passage portions to the discs so as to control the increasing velocity of a fluid relative to an opening degree formed according to an upward movement of the plug.

When conditions for regenerating purifiers are established, a control computer first causes an addition nozzle to supply a reducing agent to a first exhaust path. At this time, the control computer reduces a vane opening degree in a first supercharger and increases a vane opening degree in a second supercharger. Accordingly, the flow rate of exhaust gas discharged to the outside from the first exhaust path is reduced, and the flow rate of exhaust gas flowing to the intake path via a first exhaust gas supply path is increased. Also, the flow rate of exhaust gas discharged to the outside from a second exhaust path is increased, and the flow rate of exhaust gas flowing to the intake path via a second exhaust gas supply path is reduced. As a result, the purifiers are regenerated in a reliable manner, while suppressing variations in the flow rate of exhaust gas supplied to the intake path.

Apparatus for controlling the flow of heated water from a boiler to a water outlet comprising: a main housing, an inlet, an outlet, a variable opening, a permanent opening and a temperature sensitive adjustment mechanism configured to adjust the variable opening between a fully closed position and an open position. A heated water delivery system. The opening of a tap at a water outlet allows water to flow though the boiler. A flow control valve is located between the boiler and the outlet, such that the flow of water is limited during an initial period during which the temperature of the water is relatively low. In this way, the total flow of water is increased as the temperature of the water increases. A method of supplying heated water from a boiler through a heated water supply to a water outlet.