27 results about "Compression pressure" patented technology

The utility model relates to a diesel engine and a combustion chamber thereof. The combustion chamber of the diesel engine comprises a main body, a boss part and a pit part, the boss part is arranged on one side, far away from the top surface, of the main body, and is formed by protruding towards the direction close to the top surface; the pit part is connected with the boss part, the pit part is formed by sinking in the direction away from the top face, and a necking opening is formed in the end, close to the top face, of the pit part; in the depth direction, the range of the distance H1 from the top face to the deepest point of the pit part is 0.11 D-0. 15D, in the first direction, the range of the size D1 of the necking opening is 0.49 D-0. 53D, and D is the cylinder diameter of the diesel engine. Through the arrangement of the H1 and the D1, the volume of the combustion chamber is reduced, then a high compression ratio can be obtained, high compression pressure is provided through the high compression ratio, efficient combustion under the partial load working condition can be achieved, and the combustion efficiency is guaranteed; and meanwhile, the air utilization rate can be improved, fuel and air can be fully mixed and combusted, the fuel consumption of the engine is effectively reduced, and the requirements of high performance and low emission of the diesel engine are met.

This utility model relates to a fuel tank locking nut with a sealing gasket, belonging to the technical field of fuel tank locking nuts. The fuel tank locking nut with a sealing gasket includes: a nut with a sealing gasket at its bottom; and a sealing warning mechanism for alerting the user to leak oil from the sealing gasket. The sealing warning mechanism includes a mounting groove at the bottom of the nut, a warning component at the bottom of the mounting groove, and a sealing component between the warning component and the nut. The sealing warning mechanism can effectively detect and provide early warning of gasket leakage. Through the warning component, leaking oil can be identified early and a warning signal can be issued, preventing oil spillage. The sealing component, by indicating changes in compression pressure, helps installers confirm the sealing status, preventing seal failure due to over-pressure or under-pressure, and improving the stability of the sealing effect.

The utility model provides a diesel engine explosion pressure and compression pressure testing device, which belongs to the technical field of diesel engines and comprises a heat conduction seat and a pressure sensor. An air inlet channel, an expansion channel communicated with the air inlet channel and a communication channel communicated with the expansion channel are arranged in the heat conduction seat; the aperture of the expansion channel is larger than the aperture of the air inlet channel and the aperture of the communication channel so as to increase the contact area of gas exhausted by the air cylinder and the heat conduction base. The pressure sensor is connected with the heat conducting seat, and the communication channel is communicated with the pressure sensor; the air inlet channel communicates with the air cylinder. According to the utility model, more heat in the gas exhausted by the cylinder of the diesel engine can be dissipated through the heat conducting seat and the expansion channel, and the exhaust temperature is reduced, so that the distortion of the pressure sensor is avoided, and the accuracy of the pressure value detected by the pressure sensor is improved.

The present invention provides a supercritical gas compression air compressor and an adjustment system, which relates to the technical field of air compressors. The adjustment system is operatively connected to the compressor. The adjustment system includes a real-time optimization control subsystem, a thermal management subsystem, a safety monitoring subsystem, a multi-gas compatibility subsystem, and an energy recovery subsystem. The multi-gas compatibility subsystem processes 10Hz gas composition and sound speed data through principal component analysis and support vector machines, identifies at least five gases within 1 second, adjusts the rotational speed and pressure, supports the compression of multiple gases, improves the pressure stability by 15%, meets the different requirements of industrial gas treatment or breathing air preparation, avoids the additional cost of replacing equipment required by traditional single-gas designs, and adaptively adjusts to ensure that the energy efficiency of the system is increased by 5% under extreme working conditions. The flexibility and stability of the system in multiple scenarios significantly improve the versatility and production efficiency of the equipment.

The embodiment of the invention provides an engine control method and device, electronic equipment, a vehicle and a storage medium, and the method comprises the steps that when it is confirmed that the vehicle meets engine starting and stopping conditions, pre-starting and stopping control is executed, and the pre-starting and stopping control is to control an engine cam of the vehicle to continuously move in the preset adjusting direction; and after the target pre-start-stop duration, the engine camshaft is controlled to stop moving in the preset adjusting direction, the vehicle is controlled to execute engine rotating speed adjusting operation, and engine start-stop control is completed. According to the embodiment, after it is confirmed that the vehicle meets the engine starting and stopping conditions and before the engine rotating speed is changed, the engine camshaft is made to move to adjust the valve timing position based on the pre-starting and stopping control, so that the effective compression ratio is changed, the gas compression pressure in the engine starting and stopping process is reduced, and the engine starting and stopping efficiency is improved. The vibration phenomenon during starting and stopping of the engine is effectively reduced, and the success rate and stability of relieving vibration of the engine are improved.

The reusable carrier oil-gas mixing buffer comprises a first barrel and a second barrel, the first barrel is arranged in the second barrel in a sliding mode, a separation piston is arranged in the first barrel in a sliding mode, and the first barrel and the second barrel are separated into an oil cavity and an air cavity through the separation piston; an adjusting rod is coaxially and rotatably arranged in the oil cavity, a multi-stage damping device with a damping hole is arranged between the adjusting rod and the first side of the separation piston, and the adjusting rod rotates to adjust the drift diameter of the damping hole of the multi-stage damping device; a gas injection port and a gas exhaust port are formed in the gas cavity, and an electric control valve is arranged on the gas exhaust port; impact can be buffered through oil and gas matched compression, meanwhile, the damping force can be adjusted according to different buffering requirements, and the situation that the buffer is damaged due to the fact that the gas compression pressure is too large can be effectively avoided.

The invention relates to the technical field of compressors, and discloses a compressor assembly which comprises an elastic contraction type telescopic structure, two centrifugal extrusion structures and two pipeline clamping type sealing structures. According to the compressor assembly, compression of gas or liquid is achieved through the principle of the peristaltic pump, sucked media can be completely discharged through single compression, so that the compressor assembly has the advantage of being high in compression effect, and in addition, due to the fact that the peristaltic hose is extruded through centrifugal force of parts, the compression effect is good. Due to the fact that the centrifugal force can be adjusted and controlled by adjusting the rotating speed of the driving motor, once the gas compression strength is larger than the centrifugal force, the extrusion roller cannot form enough extrusion force on the peristaltic hose, and therefore the phenomenon that the peristaltic hose is broken due to the fact that the compression pressure is too large is effectively prevented, and the safety of equipment is improved.

The present invention relates to the field of diesel generator control technology, and more specifically to a fuel injection control method for a diesel generator set based on adaptive control. The method comprises the following steps: collecting operating data of the diesel generator set; establishing a compression fluctuation model based on the collected compression pressure fluctuation data, wherein the compression fluctuation model identifies in real time the fluctuation amplitude characteristics, frequency characteristics, and peak timing characteristics during the compression process; preliminarily calculating the injection timing and generating a preliminary injection timing control signal; and adjusting the preliminarily calculated injection timing in real time to match the injection timing with the optimal phase of the compression fluctuation, and to optimize the matching between the injection timing and the peak timing characteristics. The present invention effectively improves fuel injection control under different speed and load conditions, thereby increasing the fuel efficiency of the diesel engine, reducing emissions, and extending the engine life.

Methods and systems are provided for learning cylinder-to-cylinder air variation. During a condition in which a PFDI engine is operating in port-fuel-injection-only mode, direct-injection fuel rail pressure can be reduced via direct injection prior to port fuel injection. Then, a direct injector can be temporarily opened prior to a spark event in a port-injected cylinder to use a rail pressure sensor to estimate cylinder compression pressure and infer cylinder air charge from it.

The invention belongs to the technical field of pivot connection, discloses an automatic closing structure capable of stopping at any angle, and aims to solve the problem that a traditional pivot connection mechanism cannot give consideration to automatic closing and stopping at any angle. The core comprises a fixed bearing frame, a rotating support, a cam assembly, a pressure spring, a first friction wheel and a second friction wheel, all the components are coaxially positioned through pin shafts, precise embedding and sliding are achieved through a plane chamfer structure, and automatic closing within the range of 0-25 degrees is achieved through adaptive embedding of a cam protruding block and a groove and inclined plane design; after the angle exceeds 25 degrees, the top plane of the cam makes contact with and compresses the pressure spring, the friction force between the first friction wheel and the second friction wheel is increased, random stop at any angle ranging from 25 degrees to 125 degrees is achieved, the structure is smooth in function switching and accurate in angle positioning, use convenience and stability are both considered, and the mechanism is suitable for devices such as flip equipment needing opening and closing operation.

Fuel cell stacks (3), comprising: a plurality of fuel cells (4) arranged in a stack in a row, the stack in a row having a first side and a second side which are parallel to each other; an end plate (5, 6) at each end of the row stack; a compression belt (7, 8) adjacent to the first side of the stack of rows, and a compression belt (7, 8) adjacent to the second side of the stack of rows, wherein the opposing compression belts (7, 8) are in contact with the end plates (5, 6) at each end of the stack of rows and apply a compression pressure which presses the end plates (5, 6) together; and an electrically insulating support beam (9, 10) between each compression belt (7, 8) and the row stack, wherein the opposing compression belts (7, 8) exert a load on the first side and the second side of the row stack through the support beams (9, 10), wherein the support beams (9, 10) are flat along the sides adjacent to the stack of rows and curved along the sides adjacent to the compression belts (7, 8).

The utility model provides a gas compression pressure-bearing type well flushing control valve, relates to the technical field of oil extraction, and solves the technical problem that a well flushing control valve with a simple structure is lacked in forward well flushing in the prior art. The device comprises an upper connector, an outer cylinder, a supporting core sleeve, a lower connector, an air pressure structure and a supporting arm, the upper connector and the lower connector are sleeved with the two ends of the outer cylinder respectively, the supporting core sleeve is located in the outer cylinder, the interior of the lower connector is connected with the lower end of the supporting core sleeve, and an annular containing space is formed among the outer cylinder, the supporting core sleeve and the lower connector; the air pressure structure and the supporting arm are both located in the annular containing space, the air pressure structure is filled with air, and the supporting arm can move in the annular containing space. An annular through opening is formed between the lower end of the upper connector and the supporting core sleeve, a circulation hole is formed in the side wall of the outer cylinder, the annular through opening and the circulation hole are communicated through the annular containing space, and a communication path between the annular through opening and the circulation hole can be blocked or communicated under the movement of the supporting arm.

The invention relates to a self-sustaining gas bearing for a concentric piston arrangement. The required gas pressure is generated by the compression pressure of the pistons and temporarily stored by check valves in an annular high-pressure reservoir within a hollow cylindrical piston. The high-pressure reservoir is formed by offset axial bores that are introduced into the hollow cylindrical piston from both sides and connect at its center. The gas flow is restricted by radial and helical grooves on the outer surface of restrictor inserts. These inserts are pressed into the axial bores and, via the radial and helical grooves, establish a connection between the high-pressure reservoir and the bearing gaps. The invention enables the use of a thin-walled, hollow cylindrical piston that can be manufactured monolithically without joining elements.The gas bearing can be designed in such a way that, in addition to guiding the hollow cylindrical piston itself, it guides an additional, concentrically arranged piston in the central bore of the hollow cylindrical piston.

The present disclosure provides "engine operating systems and methods". Methods and systems are provided for estimating the maximum in-cylinder pressure of all engine cylinders while reducing the number of individual cylinders required for pressure sensing. Pressure sensing is performed on a single instrumented cylinder. For the remaining non-instrumented cylinders, a correction factor that depends on the engine speed is applied, which compensates for the variation in compression pressure between cylinders due to differences in intake valve closing.

The invention relates to a vehicle control method, system and equipment, a medium, a product and a vehicle, after an engine of the vehicle is stopped, reverse towing control is performed on the engine of the vehicle through a generator of the vehicle, and the piston stopping position of a piston corresponding to the compression stroke in the engine is changed, so that the compression pressure of gas in a cylinder when the engine is started next time is reduced; therefore, the whole vehicle shaking magnitude in the next engine intervention process is reduced, and the user experience is improved.

The invention relates to a turbojet engine starting method which comprises the following steps: step 1, starting an automobile chassis engine, enabling the automobile chassis engine to rotate and transmit power to a power takeoff through a gearbox, and enabling the power takeoff to transmit the power to an input shaft of an oil pump through a transmission shaft so as to drive the input shaft of the oil pump to rotate; 2, an input shaft of the oil pump drives the oil pump to rotate, hydraulic oil in the oil tank is extracted, meanwhile, the hydraulic oil is compressed in the oil pump along with rotation, pressure rises, and high-pressure oil is formed; 3, the high-pressure oil is conveyed in the oil pipe, a control valve on the oil pipe is opened, the high-pressure oil in the oil pipe is controlled to flow in the direction of the hydraulic motor, and the high-pressure oil is conveyed to the hydraulic motor; 4, a closed working cavity in the hydraulic motor is filled with high-pressure oil, and a rotor in the hydraulic motor rotates under the pushing action of the high-pressure oil; and 5, an output shaft of the hydraulic motor is connected with an input shaft of the turbojet engine, the input shaft of the turbojet engine is driven to rotate, and the turbojet engine is started.

The application relates to an experimental device and method for testing the pre-tightening pressure distribution of a fuel cell stack, which comprises an experimental table base, a fuel cell lower support, a guide rod, a fuel cell guide rod, an array type flexible pressure sensor module, a secondary pressure tightening module, a primary pressure tightening module, an upper support plate, a stepping motor, a fuel cell stack and a piston control circuit. The primary pressure tightening module is driven by the stepping motor to tighten the secondary pressure tightening module. The secondary pressure tightening module tightens the fuel cell stack through a secondary pressure tightening module support, and simultaneously lowers the fuel cell stack through a floating piston. Array type thin film pressure sensors are used to acquire the contact pressure between the fuel cell stack components in real time. Compared with the prior art, the application avoids the complex experimental process in the design process of the conventional fuel cell assembly scheme, greatly simplifies the experimental process, realizes the experiment on fuel cell stacks of different specifications, and has the advantages of simple operation and effectiveness.

The invention relates to a method (100) for reliquefying a BOG stream (B) drawn from a storage tank (T) for liquefied gas, comprising the steps: a1) extracting liquid (F1) from a liquid phase of the storage tank (T), a2) evaporating the liquid (F1) to produce an evaporated liquid (F2), b) introducing the evaporated liquid (F2) into the BOG stream (B) to generate a mixed BOG stream (BM), c) compressing the mixed BOG stream (BM) to a predetermined final compression pressure to produce a compressed mixed BOG stream (BMv), d) condensing the compressed mixed BOG stream (BMv) to produce a condensed compressed mixed BOG stream (BMvk), in particular with a condenser (46).

In a natural gas liquefaction method, prepared natural gas is compressed, the heat of compression is removed, the natural gas is cooled by three circuits containing mixed refrigerants, the pressure of the cooled gas is reduced to produce a vapor-liquid mixture, and the liquefied gas is withdrawn. In each circuit, a mixed refrigerant is compressed, the heat of compression is removed, the refrigerant is sub-cooled, the pressure thereof is lowered to produce in each circuit a low-pressure mixed refrigerant, and the low-pressure mixed refrigerant is used to cool the natural gas. The second mixed refrigerant end boiling point at the pressure at which the compression thereof commences is below the first mixed refrigerant temperature after reducing the first mixed refrigerant pressure, and the third mixed refrigerant end boiling point at the commencement compression pressure is below the second mixed refrigerant temperature after reducing the second mixed refrigerant pressure.

The application provides an oil path throttling device of a compressor, a compressor and an air conditioner. The oil path throttling device of the compressor comprises a main supporting seat, a first throttling channel and a throttling mechanism. The first throttling channel is arranged on the main supporting seat to enable oil to flow. The throttling mechanism is arranged in the first throttling channel. The throttling mechanism can control the change of throttling size according to the rotating speed of the rotating shaft of the compressor, and further control the change of the pressure of the oil. According to the application, the throttling capacity of the throttling mechanism is automatically adjusted according to the rotating speed. The throttling capacity is weakened when the compressor operates at high frequency to avoid excessive back pressure. The throttling capacity is strengthened when the compressor operates at low frequency to avoid energy efficiency reduction. Therefore, the problems of excessive compression pressure of the dynamic and static vortex discs and the overturning of the dynamic disc can be solved.

The invention relates to a piston compressor (1) for compressing gases, comprising at least one cylinder (6), at least one piston (5) which is mounted in a respective cylinder (6) such that a respective piston (5) and a respective cylinder (6) delimit a compression chamber (29) for compressing the gas, an inlet valve (19) for a respective compression chamber (29), an outlet valve (20) for a respective compression chamber (29), at least one annular groove (15) formed in the piston (5) at least one piston ring (16), a respective piston ring (16) being provided in each annular groove (15), and a respective radial annular chamber (112) formed on the radial inner face (110) of each piston ring (16). The piston compressor is designed to apply a compressive pressure which is directed radially outwards by means of the gas in the compression chamber (29) using a gas-conducting connection between the compression chamber (29) and the respective radial annular chamber (112) in order to seal the compression chamber (29) between the radial outer face (109) of the respective piston ring (16) and the respective cylinder (6) by means of the radially outwardly directed compressive pressure applied to the radial inner face (110) of the respective piston ring (16). At least one piston ring channel (106) is formed in the respective piston (5) as a gas-conducting connection from the compression chamber (29) into the at least one radial annular chamber (112) so that the pressure of the gas to be compressed in the compression chamber (29) acts on the radial outer face (109) of the respective piston ring (16) through the at least one piston ring channel (106).

The utility model discloses a damping self-adaptive shock absorber, and particularly relates to the technical field of damping self-adaptive shock absorbers, the damping self-adaptive shock absorber comprises a first mounting block, the lower end of the first mounting block is provided with a damping shock absorber stabilizing and protecting device, and the damping shock absorber stabilizing and protecting device comprises a second mounting block; and the protective mounting assembly is arranged on the outer wall of the damping assembly. Compared with the prior art, the damping self-adaptive shock absorber has the advantages that the problem that the service life of a telescopic adjusting protective sleeve is shortened due to the fact that the telescopic amplitude is too large when the telescopic adjusting protective sleeve is used and sealing collision, extrusion and compression pressure in the telescopic adjusting protective sleeve is large is solved; according to the device, the outer wall of the damping assembly is protected by simply and conveniently installing a telescopic adjusting protective sleeve, the practicability and use stability of the whole device are further enhanced, and the problem that the cleaning difficulty is increased due to the fact that the whole device makes contact with much external dust during use is greatly solved.

This invention relates to the field of automotive parts technology, and more particularly to a camshaft connection adjustment assembly. The technical solution includes: a camshaft assembly and multiple sets of cam assemblies rotatably connected to the outer surface of the camshaft assembly; further comprising: a connection limiting assembly slidably mounted on the outer surface of the camshaft assembly, the connection limiting assembly being disposed on both sides of the cam assembly. In this invention, the airbag ring deforms inward, causing the two sets of hollow ring frames to converge inward. The rubber bonding wall follows the hollow ring frames, reducing the contact area with the cam assembly. While the hollow ring frames reduce contact with the cam assembly, the concentrated air pressure increases the compression pressure per unit area, thus ensuring the stability of the cam assembly during rotation and preventing accelerated damage due to external forces when connected to automotive parts, thereby extending the service life of the cam.

The utility model belongs to the technical field of constant-pressure water replenishing devices, and particularly relates to an energy-saving constant-pressure water replenishing and air exhausting device which comprises a mounting plate, a water storage tank is fixedly mounted on the left side of the top of the mounting plate, a diaphragm type air pressure water tank is fixedly mounted on the right side of the top of the mounting plate, and a mounting water pipe is fixedly mounted on the right side of the water storage tank. And a rubber soft joint is fixedly mounted on the surface of the mounting water pipe. When the water pump works, water is conveyed to the water supply pipe network, redundant water enters the air pressure water tank, the water chamber is expanded, air in the tank is compressed, and when the pressure is increased to the highest working pressure, the control cabinet cuts off the power supply of the water pump, the water stored in the tank is conveyed to the water supply pipe network by utilizing the pressure of the compressed air in the tank, and the pressure in the tank is also reduced; and when the pressure is reduced to the lowest working pressure, the control cabinet is connected with the water pump power supply, and the water pump is restarted, so that the water pump does not need to run for a long time, and the service life of the water pump is prolonged.

Procedures for a hybrid vehicle, including: in response to a hybrid combustion engine shutdown or restart event, Actuating a cam adjuster, during the throttle or acceleration of an internal combustion engine (10), to operate one or both of an inlet valve (150) and an exhaust valve (156) of each cylinder (14) according to a set valve lift profile that differs from an unset valve lift profile used during cylinder combustion, wherein the set valve lift profile allows a lower cylinder compression pressure than the unset valve lift profile; and Selecting the set valve stroke profile based on the charge status of an energy storage device (50), characterized by the fact that the set valve lift profile has a valve lift that differs from the valve lift of the unset valve lift profile, and the selection is further based on each of a distance from the piston (138) to the valve and a desired combustion engine stop position.

The invention discloses a self-adaptive air cylinder control (ACCo) system and method, the system forms a closed loop through a data acquisition unit, a processing analysis unit, an integrated control unit and a man-machine interaction unit, combustion data is acquired in real time through a pressure sensor, and a processing unit calculates a plurality of key parameters such as a pressure rise value, a compression pressure value and average indication pressure in parallel; the control unit adopts a closed-loop algorithm, compares the actual values of the multiple parameters with reference values, synchronously and synergistically generates instructions and dynamically adjusts fuel injection and exhaust valve operation, and therefore precise optimization of the combustion process is achieved. The defects that a traditional system is lagged in adjustment, depends on a single parameter and cannot adapt to complex working conditions are overcome, and the beneficial effects of remarkably improving the fuel economy of an engine, reducing emission and enhancing operation reliability can be achieved.

The invention provides a multi-combustion-mode switching system of an aviation piston engine. The multi-combustion-mode switching system of the aviation piston engine comprises an electronic controller, an environment temperature pressure sensor, a post-pressure pressure sensor, a combustion excess air coefficient sensor and a crankshaft signal sensor, the electronic controller receives feedback signals of the sensors and controls the fuel injector, the spark plug and the variable valve mechanism to be switched to a target combustion mode according to calibrated combustion modes at different altitudes and under different working conditions and corresponding switching strategies under different modes. Wherein the combustion mode comprises a compression ignition combustion mode, a spark-assisted combustion mode and an ignition combustion mode. The advantages of ignition, spark-assisted compression ignition and compression ignition are considered, so that the fuel consumption is reduced as much as possible while the aviation piston engine realizes high lift limit, the unmanned aerial vehicle realizes high lift limit and long endurance, and the performance of the unmanned aerial vehicle is improved.