427 results about "Compression ratio" patented technology

The invention provides an instant-penetration expanded polytetrafluoroethylene artificial blood vessel and a preparation method thereof. The preparation method comprises the following steps: mixing PTFE dispersion resin and lubricating oil with a first compression ratio, and curing to obtain a first PTFE mixture; mixing the PTFE dispersion resin with a second compression ratio and lubricating oil, and curing to obtain a second PTFE mixture, wherein the first compression ratio is higher than the second compression ratio; the first PTFE mixture is pre-pressed into a middle layer cylinder; pre-pressing the second PTFE mixture into an inner-layer cylinder and an outer-layer cylinder; the middle-layer cylinder is put into the outer-layer cylinder, the inner-layer cylinder is put into the middle-layer cylinder to obtain a composite cylinder, and the composite cylinder is subjected to blank pressing treatment to obtain a secondary blank pressing cylinder; and carrying out one-way stretching on the secondary compaction cylinder to obtain the instant-penetration expanded polytetrafluoroethylene artificial blood vessel which is not layered after being punctured.

The present invention provides a composite multi-compression mechanism vacuum pump with a high compression ratio and high pumping speed. The multi-compression mechanism includes three types: a turbine, a traction wheel, and a vortex blade array. The traction wheel is divided into a first-stage traction wheel and a second-stage traction wheel. A first-stage exhaust port and a second-stage exhaust port are respectively provided on the base, and a valve is provided on the first-stage exhaust port. In the first pumping stage, the valve is opened, and most of the gas flows through the turbine and the first-stage traction wheel and is discharged from the first-stage exhaust port. A small part of the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array in sequence and is discharged from the second-stage exhaust port. In the second pumping stage, the valve is closed, and the gas flows through the turbine, the first-stage traction wheel, the second-stage traction wheel, and the vortex blade array and is discharged from the second-stage exhaust port. The present invention solves the problem that high pumping speed and high vacuum cannot be achieved at the same time and that the molecular pump must be equipped with a pre-stage pump by using multiple compression mechanisms in series. The present invention can replace a traditional set of multiple vacuum pumps with a single vacuum pump, significantly reducing costs.

A heat pump system for a vehicle may include an ejector configured to increase the pressure of the introduced refrigerant and discharge the refrigerant with the increased pressure to increase the pressure and flow amount of the refrigerant, thereby being capable of decreasing the refrigerant load of the compressor by reducing the compression ratio of the compressor, and reducing the cooling load and improving the cooling performance.

The invention relates to the technical field of mechanical transmission, and provides a connecting rod transmission mechanism and a mirror image engine. The connecting rod transmission mechanism comprises a power sliding block, a power connecting rod and two power pistons, the power connecting rod comprises a connecting rod base body and two linear rod parts, the linear rod parts extend in the first direction, the front end of each linear rod part is connected with one power piston, and the rear end of each linear rod part is fixedly connected with the connecting rod base body; the two linear rod parts are located on the two opposite sides of the connecting rod base body in the first direction, and the power sliding block is installed on the connecting rod base body in a sliding mode in the second direction. The linear rod part does not need to contain a bearing, rotation motion does not exist, the overall cross section is uniform or roughly uniform, standard sinusoidal motion / cosine motion is met, the size reduction design of the linear rod part and the air cylinder is facilitated, the compression ratio in the air cylinder is increased, the combustion efficiency is improved, the overall structure of the engine is more compact, and the needed engine cabin space is reduced. And the power-to-weight ratio and the acceleration performance of the vehicle can be improved.

The utility model discloses an automobile piston with a stroke rod, which relates to the technical field of automobile pistons, and comprises a piston body, slide blocks, a first connecting rod and a nut, an annular groove is arranged on the outer side of the top of the piston body, a gas ring and an oil ring are embedded in the annular groove arranged on the outer side of the piston body, and the slide blocks are arranged on two sides of the piston body. The sliding block is slidably connected with the connecting shaft, the connecting shaft is rotatably connected with one end of the first connecting rod, the other end of the first connecting rod is welded to one end of the stroke rod, the number of the stroke rods is two, and one end of the bottom of each stroke rod penetrates through one end of the top of the bearing bush. Therefore, the distance between the bearing bush and the first connecting rod can be adjusted, the stroke initial position of the piston can be adjusted, and the compression ratio of the air cylinder is reasonably distributed.

The present invention relates to a centrifugal vacuum pump group for large flow and low pressure applied to the technical field related to vacuum pumps. It adopts a three-stage series arrangement to obtain a high compression ratio, which can meet the target requirement of lower absolute pressure, and the first-stage vacuum pump adopts double-sided air intake, which can meet the target requirement of large flow; in addition, the compressed gas is cooled by spray cooling in the internal circulation, thereby replacing the heat exchanger cooling in the prior art, effectively reducing the floor space of the vacuum pump group, and the structure is compact and the cost is lower; in addition, during the internal circulation cooling process, it can automatically perform adaptive deformation according to the temperature of the gas. When the gas temperature is high, it can automatically stretch, and then form a plurality of cooling plates spaced apart from each other in the water-cooling cylinder, so that the contact range with the gas is greatly improved, so that the heat of the gas can be quickly taken away when passing through the water-cooling cylinder, thereby achieving cooling.

The invention relates to the technical field of compressed air energy storage, discloses a compressor type selection method and device of a four-section type compressed air energy storage system, and aims at solving the problem that an existing compressor type selection method is poor in accuracy. Calculating the target power of the compressed air energy storage system; determining inlet and outlet temperatures of each section of compressor; respectively determining a first compression ratio of the first-section compressor and a second compression ratio of the second-section compressor based on a genetic algorithm; determining inlet and outlet pressure of each section of compressor according to the first compression ratio and the second compression ratio; the specific volume of each section of compressor is calculated according to the inlet and outlet temperature and inlet and outlet pressure of each section of compressor, and the air volume flow of an inlet of each section of compressor is calculated; and determining the model of each section of compressor according to the inlet-outlet temperature, the inlet-outlet pressure and the air volume flow. The compressor model selection accuracy is improved, and the method is particularly suitable for a large-scale compressed air energy storage system.

A compressor and a system comprising same. The compressor (100) comprises: a housing (101), a driving motor (210), a rotating shaft (208), an impeller device (220), and a rotor device (211). A gas first passes through the impeller device (220) for first-stage compression to increase the pressure and density of the gas, and then enters the rotor device (211) for second-stage compression to further reduce the volume of the gas and increase the pressure. The compressor has higher compression ratio, air intake capacity and compressor efficiency.

The invention belongs to the technical field of compressors, and particularly relates to an MVR (mechanical vapor recompression) vapor compressor, a detection control system with multi-stage recognition capability is introduced on the basis of compressor basic equipment, and the system collects vapor parameters, mechanical states and process state data in real time through a multi-dimensional state sensing module; the operation stage identification module intelligently divides the system operation process into an initial starting stage, a transition stage and a stable operation stage according to the data; and the self-adaptive control module calls a corresponding preset strategy set according to the identified different stages and dynamically adjusts the rotating speed and the compression ratio of the compressor, for example, low-speed soft start is executed in the initial stage of start, smooth tracking adjustment is performed in the transition period, and accurate and stable control is implemented in the stable operation period. Self-adaptive and refined regulation and control of the whole process from starting to stabilization of the system are achieved, mechanical and electrical impact is effectively reduced, variable working condition adaptability and operation stability are improved, and the overall energy efficiency is optimized.

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.

The invention relates to the technical field of engines, in particular to a piston combustion chamber for a diesel and natural gas engine and the engine, and the piston combustion chamber for the diesel and natural gas engine comprises an omega-shaped pit. The straight opening type omega-shaped pit structure is adopted, compared with a traditional ignition type combustion chamber, the ineffective conical volume in the center of the combustion chamber is removed, the top dead center injection diffusion combustion mode is better met, the air utilization rate is higher, the compression ratio is higher, and higher heat efficiency can be better achieved; compared with a traditional necking omega-shaped diesel engine combustion chamber, a plurality of necking structures are removed, the first annular concave face and the second annular concave face are designed, the characteristic of natural gas injection is better met, the front end space of flames is fully released, the air utilization rate is increased, the heat transfer loss is reduced, and the combustion efficiency and the heat efficiency are improved; due to the design of the large-curvature concave surface, the problems of heat load concentration and particle friction caused by a sharp structure can be avoided, and the problems of out-of-control combustion, knocking and engine damage are reduced.

The invention belongs to the technical field of compressors, and provides a compressor and a compression system. The compressor comprises a machine shell assembly, wherein a containing part is formed in the machine shell assembly; the rotor assembly comprises a female rotor and a male rotor which are meshed with each other, and the rotor assembly is positioned in the accommodating part; and the sliding block assembly is arranged in the containing part, and the sliding block assembly can move in the radial direction of the rotor assembly so as to adjust the opening degree of an axial exhaust port of the compressor and the opening degree of a radial exhaust channel. According to the compressor, the compression ratio of the compressor can be flexibly adjusted, meanwhile, the flowing loss of the axial exhaust port with the fixed size in a medium-low pressure mode is avoided, the working efficiency of the compressor is improved, the exhaust pressure is guaranteed, and meanwhile the gas flow is also guaranteed.

The embodiment of the invention provides an engine supercharging system and a vehicle, and relates to the technical field of vehicle manufacturing. The electronic supercharger is constructed into a two-stage supercharger, the electronic supercharger is provided with a first-stage compressed air flow channel and a second-stage compressed air flow channel, a turbine compressed air flow channel is formed in the turbocharger, and the first-stage compressed air flow channel, the second-stage compressed air flow channel and the turbine compressed air flow channel are distributed in series. And the three-stage compressed air inlets are communicated with the air inlet to form three-stage compressed air inlet to the air inlet. According to the engine supercharging system provided by the embodiment of the invention, gas can be supercharged for three times through the first-stage compressed air flow channel, the second-stage compressed air flow channel and the turbine compressed air flow channel, so that the air compression ratio can be increased, the turbine hysteresis phenomenon is avoided, the air inlet pressure response speed is increased, and transient air supply to an engine is ensured; the operation stability and combustion efficiency of the engine are guaranteed, the fuel economy of the engine is improved, and the driving experience is improved.

The utility model provides a multistage variable-pitch screw vacuum pump with an adjustable compression ratio, taking two stages as an example, two parallel first-stage screws with equal pitch are arranged in a first-stage pump cavity, two parallel second-stage screws with equal pitch are arranged in a second-stage pump cavity, the pitch of the first-stage screws is larger than that of the second-stage screws, and the pitch of the second-stage screws is larger than that of the first-stage screws. A synchronous gear is installed on a shaft at one end of each first-stage screw rod and a shaft at one end of each second-stage screw rod, a variable gear is installed on a shaft at the other end of one first-stage screw rod, and the variable gear is located on the outer side of a bearing at the end. And a shaft at the other end of the second-stage screw positioned under the first-stage screw is also provided with a change gear. Through the adjustment of the change gear and the change of the screw pitch values of the upper and lower layers, the air suction and exhaust device is convenient to machine and install, the air suction and exhaust capacity is greatly improved, the working efficiency is high, the adjustment method is flexible, and the complex and changeable working conditions can be effectively coped with.

The invention discloses an efficient continuous variable geometric compression ratio device suitable for engines of various structure types, and relates to the technical field of engines. Comprising a machine body, a piston, a connecting rod, a crankshaft and an eccentric shaft sleeve, a large-head hole of the connecting rod is rotatably connected with an outer circle of the eccentric shaft sleeve, a crankshaft journal of the crankshaft is rotatably connected with an inner hole of the eccentric shaft sleeve, and at least one end of the eccentric shaft sleeve is fixedly connected with a driven gear. The driven gear is in transmission connection with a driving gear, and a regulation and control unit is arranged between the driving gear and the crankshaft. When the compression ratio of the engine needs to be adjusted, the control unit controls the driving gear to rotate to a target phase relative to the crankshaft; when the compression ratio of the engine does not need to be adjusted, the adjusting and controlling unit controls the driving gear and the crankshaft to rotate synchronously. The problems that an existing VCR device is narrow in application range and the like are solved, the mechanical loss in the operation process of an engine is greatly reduced, and the efficiency of the engine is greatly improved.

The invention relates to the technical field of energy-saving refrigeration, in particular to an energy-saving and environment-friendly carbon dioxide refrigeration system and method, and the system comprises a state analysis module, an energy efficiency analysis module, a compression ratio calculation module, a risk judgment module and an adjustment optimization module. According to the method, the system fluctuation trend is captured by analyzing the outlet pressure of the evaporator and the outlet pressure of the condenser and combining the operation state vectors generated by the suction flow and the exhaust flow of the compressor, the fluctuation trend is associated with the energy efficiency ratio change of the compressor, and dynamic energy efficiency fluctuation is provided; the compression ratio is continuously monitored, the air flow and the opening degree of an expansion valve are adjusted, stable operation of the system is ensured, the optimal energy efficiency is achieved, compression ratio adjustment is optimized in real time by analyzing fluctuation of the compression ratio and deviation between the fluctuation and an adjusting interval, the system is adjusted according to real-time data through a dynamic adjusting mechanism, energy efficiency fluctuation is restrained, and flexibility and stability are improved. Energy waste is reduced, and environmental changes are responded, and automatic adjustment is performed to maximize energy utilization.

An internal combustion engine with an external circulation system and a working method thereof are provided. The internal combustion engine is externally connected to the external circulation system through an intake port and an exhaust port. The external circulation system is capable of operating in a circulating manner when the internal combustion engine is not running, a significant raise in intake temperature is achieved during intake heating or exhaust heating, thereby the cold start-up performance of the internal combustion engine is improved and harmful emissions during cold start-up is reduced, and a compression ignition working mode of a low compression ratio engine is facilitated to be achieved.

The invention relates to the technical field of fluid supercharging applied to internal combustion engines, in particular to an ultrahigh compression ratio injection supercharging device based on hierarchical regulation and control. Comprising a main pipe flow system, a graded regulation and control ejection flow system and a controller, the main pipe flow system is characterized in that a main pipe flow system pressure regulating pry receives initial high-pressure gas in an upstream pipeline, depressurizes the initial high-pressure gas to obtain medium-pressure gas, and conveys the medium-pressure gas to the supercharging equipment; the supercharging equipment pressurizes the medium-pressure gas into high-pressure gas and sends the high-pressure gas to the downstream pipeline; the graded regulation and control ejection flow system comprises multiple grades of ejectors and high-pressure regulating valves, low-pressure check valves, medium-pressure regulating valves and pressure sensors corresponding to the ejectors of all the grades, and the regulation and control ejection flow system corresponding to the multiple grades is formed. The device provided by the invention can recover gas fluid emptied by the supercharging equipment and pressurize and inject the gas fluid back into an inlet of the supercharging equipment for reutilization, so that the energy of working fluid is more effectively utilized, the overall efficiency is improved, and fluid recovery with an ultrahigh compression ratio is realized.

A method for the autonomous control of a surface unit of an oil well or gas well down-hole rod pump to provide for a reduction of gas interference and an increase in production, the method providing for autonomous adjustment of one or more pump operation characteristics, including one or more of dwell time, polished rod travel, compression ratio, and pump cycle rate, and the method including autonomous determination of a weight transfer position, autonomous determination of a rate of weight transfer, determination of a stretch factor of the polished rod, and autonomous adjustment of one or more of the pump operation characteristics for successive pump cycles of the down-hole pump installation based upon the weight transfer position, the rate of weight transfer, and the stretch factor.

A gas spring-powered fastener driver includes an outer cylinder, an inner cylinder positioned within the outer cylinder, and a moveable piston positioned within the inner cylinder. The gas spring-powered fastener driver further includes a driver blade attached to the piston and movable therewith between a top-dead-center (TDC) position and a driven or bottom-dead-center (BDC) position. The outer cylinder and the inner cylinder define a first total volume in which gas is located when the driver blade is in the TDC position. The outer cylinder and the inner cylinder define a second total volume, in which gas is located when the driver blade is in the BDC position. A compression ratio of the second total volume to the first total volume is 1.7:1 or less. And, a force acting on the driver blade when located in the TDC position is at least 90 pound-force (lbf) but no more than 450 pound-force (lbf).

Arrangement for driving an adjusting shaft (2) for adjusting the expansion stroke and / or the compression ratio of an internal combustion engine (1), wherein the arrangement has a drive motor (11) which is or can be connected to the adjusting shaft (2) via a gear mechanism, characterized in that the gear mechanism is designed as a tension wave gear mechanism (13) with a wave generator (14), an externally toothed flexspline (16) and an internally toothed ring gear meshing with the flexspline (16), and is arranged in a gear housing (22) which is or can be fastened to the crankcase (25) of the internal combustion engine (1) in such a way that the flexspline (16) always remains in the same rotational position relative to the gear housing (22), wherein the tension wave gear mechanism (13) is designed to transmit a torque to the adjusting shaft (2), the coupling end of which executes an axial and / or radial movement in an externally driven manner,an output element (35) comprising the ring gear, which is torsionally rigid and at the same time flexible and at least partially, in particular completely, decouples the flexspline (16) from the externally driven axial and / or radial movement.

The present invention relates to the technical field of pipe material connection, and discloses a material connection support mechanism, comprising a material connection base frame, a fixed plate arranged on the material connection base frame, a movable plate arranged on the fixed plate and capable of being raised and lowered, a two-stage movable plate arranged on the one-stage movable plate and capable of being raised and lowered, a one-stage material connection component for driving the one-stage movable plate to be raised and lowered, and a two-stage material connection component for driving the two-stage movable plate to be raised and lowered following the one-stage movable plate to be raised and lowered, the top of the two-stage movable plate is hinged with a material connection plate, and the two-stage movable plate is provided with a material connection drive component for driving the material connection plate to be horizontally or downwardly tilted; through the above-mentioned arrangement, the material connection support mechanism has the function of supporting the pipe fittings up and down, and realizes a support stroke with a minimum compression ratio of two stages of rising or falling, can realize a larger moving stroke, adapts to the material connection height requirements of the pipe cutting machine, and is conducive to the rational use of space.

A piston (22) for an internal combustion engine (12) includes a piston skirt (64) and a piston crown (70) attached to the piston skirt and including a combustion face (72). The combustion face forms a piston rim (74) and a combustion bowl (78). A bowl rim (82) defines an intersection of the combustion bowl and the piston rim, and a reentry surface (84) defining a reentry angle extends between the bowl rim and the bowl outer wall. A ratio of a bowl depth dimension coincident with the piston central axis to a compressed height dimension coincident with the piston central axis is from about 0.30 to about 0.35.

Method for controlling the internal combustion engine (4) of a motor vehicle during the operation of the motor vehicle, wherein the internal combustion engine (4) has at least two operating modes in which different torque ranges are provided, and the control has a switching function for switching the internal combustion engine between the at least two operating modes, comprising the steps: Performing route forecasting during operation to determine route data for upcoming track sections, Predicting the torque requirement for upcoming track sections based on track data, The switching function for changing the internal combustion engine from a first operating mode to at least the second operating mode for an upcoming section of track may only be activated if the track forecast for the upcoming section shows that the operating point of the internal combustion engine lies within a torque range for at least a predetermined period of time, which covers the torque requirement predicted for this section of track by at least the second operating mode. characterized by the fact that the operating modes are realized through different compression ratios of the internal combustion engine.

The application relates to a fan control method based on a compression ratio and an air energy heat pump. The fan control method comprises the following steps: controlling a fan to operate at a basic rotating speed, and calculating a current time compression ratio; acquiring a reference compression ratio of a compressor, calculating a fan target rotating speed according to the current time compression ratio and the reference compression ratio, and controlling the fan to operate according to the target rotating speed. The control method can control the fan rotating speed through a PID adjustment mode based on the change rate of the compression ratio and the reference compression ratio when the heat pump is in a partial load or low load working condition, can more accurately match the refrigeration or heating demand of the heat pump, can match the rotating speed of the fan with the actual required evaporation capacity, can control the energy consumption of the fan on the basis of improving the evaporation capacity of the evaporator, and can make the energy efficiency ratio of the system reach better optimization.

The invention belongs to the technical field of Internet of Vehicles communication, and discloses a heavy diesel vehicle remote monitoring method and system based on edge computing, and the method comprises the steps: constructing a rule engine according to a predefined transmission rule, and deploying the rule engine to an edge computing node; the data stream of the heavy diesel vehicle is transmitted to an edge computing node, a rule engine is used for evaluating each data field in the data stream, a corresponding transmission level is distributed, and the transmission level comprises a first-level field, a second-level field and a third-level field; and matching a preset transmission strategy according to the data field with the allocated transmission level, executing differentiated data processing, and transmitting a processing result to an enterprise cloud platform through a network transmission layer. According to the method, low-value data is filtered in real time through edge calculation, the invalid data uploading amount is reduced, and data transmission is reduced; in addition, through a high compression ratio and a delay transmission technology, the bandwidth occupation of low-value data is reduced, and the utilization efficiency of network resources is optimized.

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains the discharge pressure and the return air pressure of the compressor; controls the operation of the flow regulating device according to the discharge pressure and the return air pressure, detects the discharge pressure and the return air pressure of the compressor in real time, then adjusts the flow regulating device according to the detected discharge pressure and return air pressure, adjusts the flow regulating device, and effectively avoids the situation that the compression ratio of the compressor is increased, further protects the compressor, and prolongs the service life of the compressor.

The invention provides an in-cylinder explosion pressure measuring device and a high detonation pressure engine thereof, and the device comprises a detonation pressure bushing which is connected with a cylinder sleeve and is internally provided with a through hole, the through hole is communicated with a cylinder combustion chamber, and the through hole is composed of a detonation pressure channel, a fuel gas pool and a containing cavity; and the detonation pressure sensor is arranged in the containing cavity, and high-temperature fuel gas in a combustion chamber of the air cylinder is introduced into the fuel gas pool through the detonation pressure channel, so that the detonation pressure sensor carries out pressure sampling. The measuring device can meet the requirement that the explosion pressure sensor cannot directly measure the explosion pressure, the explosion pressure is measured through the explosion pressure channel and the fuel gas pool arranged in the explosion pressure lining, it can be guaranteed that the compression ratio in a cylinder cannot be changed to the maximum limit, and then the technical effect of accurately measuring the explosion pressure is achieved.

The present disclosure provides a method and system for operating an engine. The system and method for operating an engine including a compression ratio connecting rod for adjusting the engine's compression ratio are described. The system and method provide different ways to diagnose the presence or absence of engine misfire in response to engine operating regions that may be more or less susceptible to torsional engine crankshaft vibration. In one example, engine misfire may be determined in response to a force applied to the engine's compression ratio changing connecting rod.

An engine (100), comprising: a housing (1), a piston (3), and an intake valve (2). The housing (1) is provided with a combustion chamber (11) and an intake passage (12) in communication with the combustion chamber (11). The piston (3) is movably arranged in the combustion chamber (11). The intake valve (2) is movably arranged between the combustion chamber (11) and the intake passage (12). When the piston (3) moves to a preset position, the intake valve (2) is closed, the compression ratio of the engine (100) is A and the expansion ratio thereof is B, wherein 8.6≤A≤14.2, and 15≤B≤18. Also disclosed are a powertrain and a vehicle.