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2074 results about "Cylinder head" patented technology
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In an internal combustion engine, the cylinder head (often informally abbreviated to just head) sits above the cylinders on top of the cylinder block. It closes in the top of the cylinder, forming the combustion chamber. This joint is sealed by a head gasket. In most engines, the head also provides space for the passages that feed air and fuel to the cylinder, and that allow the exhaust to escape. The head can also be a place to mount the valves, spark plugs, and fuel injectors.
Welding device for cylinder barrel machining
The invention relates to the technical field of cylinder barrel welding, and particularly discloses a welding device for cylinder barrel machining, which comprises a machine base and a three-jaw chuck rotating on the machine base, a bearing plate is arranged on the machine base, and a plurality of roller groups are arranged on the bearing plate along the left-right direction; a clamping module is arranged on the bearing plate and comprises a clamping unit and a pulling unit; the clamping unit comprises a sliding seat elastically and slidably connected to the bearing plate in the left-right direction, two supporting frames are symmetrically arranged on the sliding seat in the front-back direction, and the supporting frames are elastically and slidably connected to the sliding seat in the front-back direction. The welding device has the beneficial effects that the two clamping rods can be rapidly made to avoid towards the right side only by pulling the pull rod, meanwhile, the distance between the two clamping rods can be increased, space is reserved for placement of the cylinder cover, after the pull rod is loosened, the clamping rods are rapidly reset to clamp and fix the cylinder cover, manual intervention is not needed for auxiliary positioning during welding, and the welding efficiency is improved. And manpower is effectively saved.
Owner:GUANGDONG TONGXING HYDRAULIC INTELLIGENT EQUIP CO LTD
Product screw and nut automatic assembling device
The utility model discloses an automatic product screw and nut assembling device which comprises a working table, a vibration feeding disc, a feeding track, a feeding positioning assembly, a nut assembling assembly and an assembling positioning assembly, the vibration feeding disc is fixedly installed on the working table, a discharging port of the vibration feeding disc is connected with the feeding track, a discharging port of the feeding track is connected with the feeding positioning assembly, and a discharging port of the nut assembling assembly is connected with the assembling positioning assembly. A nut assembling assembly is erected above the feeding positioning assembly, an assembling positioning assembly is arranged in the moving stroke coverage range of the nut assembling assembly, the assembling positioning assembly comprises a rotating power device, a rotating table, a clamping air cylinder and an assembling jig, and the rotating output end of the rotating power device is fixedly connected with the rotating table; two opposite clamping air cylinders are fixedly installed at the center of the upper end face of the rotating table, cylinder heads of the clamping air cylinders are connected with an assembling jig, the assembling jig is fixedly installed on the rotating table, the nut and screw assembling machine is simple in structure, two nuts and two screws can be assembled at the same time, and working efficiency is improved.
Owner:SIP JUNLY IND PRECISION CO LTD
Piston-cylinder unit, set comprising a piston-cylinder unit and a group of piston-cylinder units
The invention relates to a piston-cylinder unit. The piston-cylinder unit has a piston motion sensor which is arranged in a transverse hole of a cylinder head having a longitudinal axis. According to the invention, the piston motion sensor is detachably connected to a housing plug through a sensor cable. The housing plug is L-shaped. One leg of the housing plug extends in the transverse hole of the cylinder head, while another leg extends lying externally from the cylinder head. The invention enables the operation of the piston-cylinder unit with housing plugs of different types.The piston-cylinder unit according to the invention finds, for example, use for a work machine, construction machine, agricultural machine, maritime machine, wheel loader, excavator, dumper, crane, forklift or lifting platform.
Owner:PACOMA GMBH
Liquid viscosity detection device
ActiveCN120445917APreparing sample for investigationDirect flow property measurementLiquid viscosityCylinder head
The invention discloses a liquid viscosity detection device, and particularly relates to the field of viscosity detection.The liquid viscosity detection device comprises a base, a control box and a bathtub are arranged on the base, the bathtub is used for containing constant-temperature bath liquid, a cylinder cover covers the bathtub, an opening is formed in the cylinder cover, and a capillary tube clamp is arranged at the opening; the capillary tube clamp is used for clamping the capillary tube viscometer, the capillary tube viscometer extends into the bathtub, a heating assembly and a stirrer are mounted on the cylinder cover, the heating assembly is used for heating constant-temperature bath liquid, and the stirrer is used for stirring the constant-temperature bath liquid. The capillary viscometer extends into the bathtub, the constant-temperature bath liquid is heated by the heating assembly, and the stirrer is used for stirring to uniformly distribute heat, so that the temperature of the to-be-detected liquid in the capillary viscometer can be kept constant, and the viscosity of the to-be-detected liquid under a certain temperature condition can be detected; and the influence of environment temperature change is avoided.
Owner:TIANJIN TAIZHUO TECH CO LTD
System and method for misfire detection for dual spark plug engine
PendingUS20250244207A1Internal-combustion engine testingCombustion enginesCombustion chamberCylinder head
A system for detecting a source of a misfire for a turbulent jet ignition (TJI) engine having a first ignition device disposed in a pre-chamber of a cylinder head and a second ignition device disposed for communication with a main combustion chamber is presented. The system includes a controller that determines engine operating conditions; generates a first spark from the first ignition device at a first time; generates a second spark from the second ignition device at a second time; activates a skipfire mode based on a determination that the engine operating conditions are satisfactory, wherein in the skipfire mode, the controller generates a modified second spark at a modified second time, the modified second time being later than the second time; and determines a misfire event based on sensing ionization of gasses at the main combustion chamber subsequent to firing the first and second ignition devices.
Owner:FCA US LLC
Liquid ammonia in-cylinder direct injection engine combustion system with active pre-combustion chamber and method
ActiveCN120650066AElectrical controlInternal combustion piston enginesCombustion systemCombustion chamber
The invention provides a liquid ammonia in-cylinder direct injection engine combustion system and method with an active pre-combustion chamber, and relates to the technical field of internal combustion engines, the liquid ammonia in-cylinder direct injection engine combustion system comprises a cylinder cover and a cylinder sleeve arranged below the cylinder cover, the pre-combustion chamber is vertically arranged in the center of the cylinder cover, a liquid ammonia injector is arranged on one side of the pre-combustion chamber, and the active pre-combustion chamber is arranged in the cylinder sleeve. A hydrogen ejector and a spark plug are arranged on the pre-combustion chamber; and spraying holes are formed in the pre-combustion chamber and located in the bottom of the pre-combustion chamber, and the spraying holes of the pre-combustion chamber face one side of the liquid ammonia ejector. According to the liquid ammonia in-cylinder direct injection engine combustion system and method with the active pre-combustion chamber, the effect that diffusion combustion is promoted through premixed combustion of ammonia fuel is achieved, accurate control over the combustion initial point and the heat release rate is achieved, and the requirements for the low hydrogen energy ratio, high ignition efficiency and high heat efficiency of an ammonia fuel engine in the full working condition range are met.
Owner:TIANJIN UNIV
Compressor partition plate hole machining clamp
The invention relates to the technical field of compressor cylinder covers, in particular to a compressor partition plate hole machining clamp which comprises a support, four sets of positioning mechanisms, a fixing mechanism and a power mechanism, the four sets of positioning mechanisms are evenly distributed on the support, each set of positioning mechanism comprises a mandrel and an elastic clamp arranged on the mandrel in a sleeving mode, and workpieces are arranged on the elastic clamps in a sleeving mode; the fixing mechanism and the positioning mechanism are correspondingly arranged, and the fixing mechanism comprises a mounting plate arranged on the outer side of the mandrel, a plurality of sets of supporting assemblies arranged on the mounting plate in a circumferential array mode and pressing assemblies arranged corresponding to the supporting assemblies; the power mechanism is installed on the support and drives the supporting assembly, the positioning mechanism and the pressing assembly to act in sequence to clamp a workpiece. The workpiece is placed on the multiple sets of supporting units, the supporting faces of the two sets of turning plates in each set of supporting units can be rotated from opposite arrangement to upward arrangement to support the workpiece, after the workpiece is supported, the positioning mechanism and the pressing assembly fix the workpiece, and the problem that in the prior art, the workpiece positioning precision is poor is solved.
Owner:ZHEJIANG BAIDA PRECISION MFG CORP
Auxiliary device for assembling valve collet of engine cylinder cover
The utility model discloses an engine cylinder cover valve collet assembling auxiliary device which comprises a roller way, a cylinder cover positioning device installed on the roller way and a power mechanism driving a press-fitting plate to move up and down. The power mechanism comprises an oil cylinder and is characterized by further comprising an oil cylinder rod mounting plate, the oil cylinder rod mounting plate is mounted below the roller way, the middle of the oil cylinder rod mounting plate is connected with the end of an oil cylinder rod of the oil cylinder, and guide rods are fixedly mounted at the two ends of the oil cylinder rod mounting plate respectively; longitudinal frames are fixedly mounted at the upper ends of the guide rods; the press-fitting plate is located above the roller way, and the two ends of the press-fitting plate are connected to the longitudinal frame. The press-fitting plate is further provided with a transverse middle long groove extending in the length direction of the press-fitting plate, a plurality of longitudinal grooves which are longitudinally arranged and intersect with the middle long groove, and a plurality of transverse grooves which are transversely arranged. The press-fitting device has the advantages of being compact in structure, high in working efficiency, capable of adapting to installation of various valve lock clamps without replacing the press-fitting plate and the like.
Owner:GUANGXI YUCHAI MASCH CO LTD
Fuel ignitor, cylinder head - fuel ignitor combination, a gas operated internal combustion engine and method of converting an existing internal combustion piston engine
PCT designated stageWO2025256739A1Internal combustion piston enginesFuel supply apparatusCombustionCylinder head
Invention relates to a fuel ignitor (10) for gaseous fuel comprising a body assembly (12) having a longitudinal axis (A), and a first axial end and a second axial end. The ignitor body assembly (12) comprises a. a prechamber (20) arranged at the first axial end and having a tip, and more than two jet openings (22) arranged to the tip of prechamber (20) at the first axial end, b. a fuel inlet (26) arranged to open into the prechamber (20), c. first cavity (28) arranged to extend from the second axial end of the body assembly (12) to proximity to the prechamber (20), wherein a solenoid actuated gas admission valve unit (29) is arranged in the first cavity (28), d. second cavity arranged to extend from the second axial end of the body assembly (12) to the prechamber (20), wherein an ignition device (31) is arranged in the second cavity in cooperation with the prechamber (20) so as to initiate combustion of fuel in the prechamber (20), when in use, e. cooling channels (32) arranged at the first axial end of the ignitor body assembly (12) arranged in heat transfer connection with the prechamber (20). Invention relates also to a cylinder head - fuel ignitor combination, a gas operated internal combustion engine and method of converting an existing internal combustion piston engine.
Owner:WARTSILA FINLAND OY
An all-aluminum energy-saving air compressor
ActiveCN118896058BPositive displacement pump componentsInternal combustion piston enginesCylinder headCrank
The present invention proposes an all-aluminum energy-saving air compressor, which specifically relates to the technical field of air compressors and includes a cylinder head, a valve plate assembly fixedly provided at the bottom end of the cylinder head, a cylinder body fixedly provided at the bottom end of the valve plate assembly, a lubrication system provided inside the cylinder body, an oil pump portion fixedly provided at the end thereof, the lubrication system connected to the oil pump portion, the lubrication system connected to the crank-connecting rod structure, the crank-connecting rod structure slidably provided in the cylinder body; the cylinder head, valve plate assembly, cylinder body, lubrication system, oil pump portion, crank-connecting rod structure are all made of aluminum alloy material, and the inner cavity of the cylinder body is coated with a ceramic film. The all-aluminum energy-saving air compressor provided by the present invention can make the air compressor lightweight while also making the deformation consistency of the cylinder body of the air compressor. It adopts an all-aluminum cylinder body with a built-in oil pump function, has a simple structure and process, reduces fuel consumption, and achieves low pollution, energy saving and environmental protection requirements.
Owner:LONGKOU LONGJI THREE PUMPS CO LTD
Cylinder cover, engine, hybrid assembly and vehicle
The air cylinder cover comprises a body, a plurality of cylinder openings are formed in the body, the cylinder openings and a cylinder body are used for forming a combustion chamber in a surrounding mode, and the multiple cylinder openings are sequentially arranged in the first direction at intervals; a first connecting hole is formed in the body, and a fixing piece for connecting the body and the cylinder body passes through the first connecting hole; a second connecting hole is formed in the body, and a connecting piece for connecting the body and the cam bearing seat passes through the second connecting hole; the first connecting holes and the second connecting holes are arranged at intervals in the second direction perpendicular to the first direction. By means of the arrangement, the torque of the cylinder cover in the front-back direction (namely the extending direction of the cam shaft) can be balanced, deformation or displacement possibly caused by staggered arrangement of the cam bearing seat and the cylinder cover bolt on the cylinder cover in the front-back direction is avoided, and therefore it is guaranteed that stress on the cylinder cover in the up-down direction and the front-back direction is relatively uniform; and the structural strength and the bearing capacity of the cylinder cover are improved.
Owner:BYD CO LTD
A cylinder structure for preventing liquid hammer in a reciprocating piston compressor and a working method thereof
The present invention discloses a cylinder structure and a working method for preventing liquid hammer in a reciprocating piston compressor. The cylinder structure mainly includes a piston, a cylinder body, a fixed stopper, and a partition. A partition that can slide along the cylinder body is provided in the cavity between the fixed stopper and the cylinder head. The partition is sealed from the inner wall of the cylinder body. An elastic structure is provided in the cavity surrounded by the partition, the cylinder body, and the cylinder head. The elastic structure applies a thrust toward the piston to the partition, causing the partition to cling to the fixed stopper. The force applied by the elastic structure to the partition is greater than the force acting on the partition in the normal exhaust state of the cylinder structure. When the pressure in the cylinder rises sharply at the end of exhaust due to liquid accumulation, the high pressure in the cylinder will push the partition to overcome the spring force and move toward the cylinder head, forming a buffer space, thereby reducing the pressure in the cylinder and preventing the sudden increase in high pressure from damaging valuable components such as the intake and exhaust valves, piston, and connecting rod. Therefore, the present invention can solve the problem of liquid hammer in the cylinder from the root.
Owner:XI AN JIAOTONG UNIV
Diesel engine cylinder fault diagnosis method and system based on MMFE-PSO-KELM
The invention provides a diesel engine cylinder fault diagnosis method and system based on MMFE-PSO-KELM, and the method comprises the steps: S1, collecting a vibration signal of the surface of a cylinder cover of a diesel engine cylinder and a rotating speed signal of a crankshaft, and carrying out the preprocessing of the vibration signal; s2, an MMFE algorithm is adopted to analyze and process the preprocessed vibration signals, and MMFE feature vectors rich in high-frequency and low-frequency fault mode information are constructed; s3, optimizing a regularization parameter C and a kernel function parameter sigma of the KELM model by using a PSO (Particle Swarm Optimization) algorithm, and searching an optimal parameter combination which maximizes the classification accuracy by taking the classification accuracy as a fitness function; and S4, constructing a KELM diagnosis model based on the optimal parameter combination, and performing fault diagnosis on the diesel engine cylinder by taking the high-frequency and low-frequency fault mode information extracted by the MMFE algorithm as input. According to the method, strong noise interference can be effectively inhibited, fault feature information can be comprehensively reserved, KELM key parameters can be optimized, and the accuracy and reliability of fault diagnosis of the diesel engine cylinder are improved.
Owner:SHANDONG XIEHE UNIV
Disassembling and assembling platform for cylinder cover of dual-fuel diesel engine
The invention discloses a dual-fuel diesel engine cylinder cover disassembling and assembling platform in the technical field of diesel engine cylinder cover assembling, which is used for disassembling and assembling an air valve guide pipe on a cylinder cover main body and comprises a working table, a clamping mechanism arranged on the working table and used for clamping the cylinder cover main body, and a bearing frame arranged on the working table, the disassembly and assembly driving mechanism and the disassembly and assembly auxiliary mechanism are arranged on the bearing frame. The dismounting and mounting driving mechanism is arranged to dismount the air valve guide pipe on the air cylinder cover, and when the dismounting and mounting driving mechanism cannot drive the air valve guide pipe to move upwards to be separated from the mounting hole in the air cylinder cover body, the heating ring makes contact with the mounting hole area in the air cylinder cover body to heat the mounting hole area; the mounting hole area is uniformly heated and expanded through heat conduction, friction force is reduced through heat expansion difference, the stuck old air valve guide pipe is assisted to be smoothly disassembled, the damage risk of the air valve guide pipe and the mounting hole is greatly reduced, and meanwhile the assembling precision and the sealing performance of the new air valve guide pipe are guaranteed.
Owner:ANQING CSSC DIESEL ENGINE
Automatic assembling device and method for O-shaped ring in oil injector hole of engine cylinder cover
The invention discloses an automatic assembling device and method for an O-shaped ring in an oil injector hole of an engine cylinder cover, and relates to the technical field of engine cylinder covers. The feeding mechanism comprises a feeding base, and a vibrating screen mechanism, a stop block mechanism and a jacking mechanism which are connected to the feeding base; the vibrating screen mechanism is used for sequentially conveying a plurality of O-shaped rings into the mounting positions of the stop block mechanism; a supporting claw connected with an O-shaped ring is arranged in an installation position of the check block mechanism, and an opening and closing baffle assembly is arranged at the top of the installation position. The jacking mechanism is provided with a jacking plate and a jacking device, and the jacking device can jack the jacking plate to enable the O-shaped ring on the supporting claw to be ejected out. The assembling mechanism comprises a conveying mechanism, an assembling base, a driving device and a grabbing and clamping mechanism; the assembling base is movably connected to the conveying mechanism; the driving device is connected to the assembling base; the driving device drives the grabbing and clamping mechanism to move so as to grab the O-shaped ring on the supporting claw, and the O-shaped ring is pressed into an oil spraying hole of the cylinder cover.
Owner:WEICHAI POWER CO LTD +1
Methanol-diesel oil dual-fuel internal mixing type oil injector capable of being independently controlled
PendingCN120667292AInternal combustion piston enginesFuel injection apparatusMethanol fuelCylinder head
The invention relates to the field of power and energy engineering, in particular to a methanol-diesel dual-fuel internal mixing type fuel injector capable of being independently controlled. In order to overcome the defects that in the prior art, a dual-fuel injection system is complex in structure, the size of an oil injector is large, a cylinder cover is difficult to install, the fuel premixing capacity is poor, and injection control is not flexible, the technical scheme is that the methanol-diesel oil dual-fuel internal mixing type oil injector capable of being independently controlled comprises an oil injector shell; the fuel injector shell is provided with a methanol fuel inlet, a diesel fuel inlet, a fuel injection hole as well as a methanol oil way and a diesel oil way which are respectively connected with the methanol fuel inlet and the diesel fuel inlet; a methanol control assembly, a diesel oil control assembly, a pressure control chamber, a ball valve, a needle valve and a premixing pressure cavity are arranged in the oil injector, injection of methanol and injection of diesel oil can be controlled respectively, and mixed injection of two kinds of fuel can be achieved in the premixing pressure cavity. The methanol-diesel oil dual-fuel efficient mixed injection system is suitable for modification work of an engine oil injection system needing to achieve methanol-diesel oil dual-fuel efficient mixed injection and precise control in the fields of ship power, heavy vehicles, engineering machinery and the like.
Owner:HARBIN ENG UNIV
Visual inspection method for surface defects of cylinder body and cylinder cover of engine
The invention relates to the technical field of engine cylinder body and cylinder cover surface defect detection, and discloses a visual detection method for engine cylinder body and cylinder cover surface defects, which comprises the following steps of: acquiring engine cylinder body and cylinder cover surface images under various different imaging conditions, preprocessing, extracting a feature vector of each pixel block, distributing weights by using a weight function, and calculating the surface defects of the engine cylinder body and cylinder cover. The method comprises the following steps: extracting a suspected defect area, introducing a loss function for verification, constructing a causal graph, calculating the probability of each defect type through causal inference, providing a decision basis for final output decision, and finally outputting a defect result. By integrating multi-angle illumination, multi-spectral imaging and laser scanning systems, rich information of the surface under different physical characteristics can be obtained, and it is ensured that various types of defects can present high contrast characteristics under at least one imaging mode.
Owner:YICHANG WASHING MACHINE
Intake manifold assembly
ActiveCN223359276UInternal combustion piston enginesCombustion-air/fuel-air treatmentEngine efficiencyNaturally aspirated engine
The utility model relates to the technical field of engines, and particularly discloses an intake manifold assembly which is arranged between an air damper and air inlet channels on an air cylinder cover in a communicated mode and comprises an upper shell and a lower shell which are in butt joint with each other, a main cavity is formed between the upper shell and the lower shell, and a flange connector is arranged at one end of the lower shell. One end of the flange joint communicates with the main chamber, and the other end of the flange joint communicates with the throttle valve; a plurality of manifold cavities are formed in the end, away from the flange connector, of the lower shell, communicate with the main cavity and communicate with the multiple air inlet channels correspondingly. An oil rail is arranged on the upper shell, a plurality of mounting pipes are arranged on the lower shell, one mounting pipe is communicated with one manifold cavity, oil sprayers are arranged in the mounting pipes, and the oil sprayers are communicated with the oil rail; one end of the oil sprayer far away from the oil rail extends out of the manifold cavity; the problems that under the same displacement, a naturally aspirated engine is usually low in power, low in overall engine efficiency and the like are solved.
Owner:MIANYANG XINCHEN ENGINE
Automatic laying and forming process for carbon fiber fully-wound gas cylinder end socket reinforcing ring
The invention discloses an automatic laying and forming process for a reinforcing ring of a carbon fiber fully-wound gas cylinder end socket, and relates to the technical field of carbon fiber wound gas cylinders. Technological parameters are simulated and optimized; the laying line type is imported into software to plan the motion track of the robot; carbon fiber prepreg is adopted, single-layer prepreg laying is conducted between every two spiral layers of the gas cylinder according to the optimal process parameters, and the laminating state of the prepreg is monitored in real time. Full-automatic precise laying can be achieved, and the production efficiency and consistency are improved; the material utilization rate is improved; the manufacturing cost is reduced; the laying wrinkle defect is eliminated, and the gas cylinder bearing safety is improved; process parameters are quantified and optimized, and the performance of the carbon fibers is fully released.
Owner:SINOMA SCI & TECHSUZHOU
Press fitting device for one-way valve of automobile engine cylinder cover
The embodiment of the utility model provides an automobile engine cylinder cover one-way valve press-fitting device, and relates to the technical field of automobile assembly, the automobile engine cylinder cover one-way valve press-fitting device comprises a bottom plate and a fixing pipe, and the center of the top surface of the bottom plate is fixedly connected with the fixing pipe. According to the press-fitting force during press-fitting operation of the engine cylinder cover one-way valve, the balancing weight with the specified weight is mounted on the mounting plate, the press-fitting force is controlled, the press-fitting precision of the engine cylinder cover one-way valve is conveniently improved, then under driving of the driving assembly, the fixing rod can move on the upper side of the push plate, and the press-fitting precision of the engine cylinder cover one-way valve is improved. When the movable plate moves the engine cylinder cover one-way valve to a designated position, at the moment, the fixed rod moves to one side of the push plate, the fixed rod slides down from the highest position of the push plate under the action of gravity, the fixed rod drives the movable rod to move, the movable rod drives the mounting plate to move, and a balancing weight on the mounting plate conducts press fitting operation on the engine cylinder cover one-way valve. Operation is convenient and fast, and the engine cylinder cover one-way valve press-fitting operation efficiency is effectively improved.
Owner:WUHU YUANZHEN TECHNOLOGY CO LTD
A six-cylinder four-valve engine exhaust system and exhaust pipe
This invention discloses an exhaust system for a six-cylinder, four-valve engine, including a cylinder head and an exhaust pipe. The cylinder head contains coolant and has several cooling water passages. A guide edge is provided within the cylinder head, and guide holes are formed between the guide edge and the top and bottom surfaces of the cylinder head. A set of mounting holes is located above the guide holes on the front end face of the cylinder head. The exhaust pipe is fixed to the front end of the cylinder head through the mounting holes. The exhaust pipe has a segmented structure, and a sealing structure is provided at the joints of the segments. This invention eliminates dead zones in the coolant flow, improving coolant fluidity and preventing excessively high surface temperatures in the cylinder head's water passages. The installation of long bolts on the exhaust pipe, through control of positioning errors and fitting clearances, ensures that the bolts and holes do not interfere, preventing stress caused by interference and exhaust pipe breakage at high temperatures. The composition of the exhaust pipe has been improved, enhancing its high-temperature resistance.
Owner:GUANGXI YUCHAI MASCH CO LTD
Compressor assembly, air supply system, vehicle
ActiveUS20250243858A1External parameterRegistering/indicating working of vehiclesCylinder headControl theory
A compressor for a commercial vehicle comprises:a plurality of cylinders, wherein each cylinder accommodates a reciprocating piston, wherein the reciprocating piston is driven by a crankshaft, anda plurality of cooling means, arranged at a cylinder head region of the cylinder, wherein one specific cooling means is assigned to one cylinder respectively.The compressor assembly comprises a sensor network, wherein the sensor network comprises a plurality of temperature sensitive switches, whereineach temperature sensitive switch is assigned to a cylinder.
Owner:ZF CV SYST EURO BV
Sliding arrangement
A sliding arrangement for use in an internal combustion engine is described, comprising a cylinder liner (1) and at least one piston ring (10), wherein the liner (1) has a through-bore defining an inner surface (S) which in turn defines three sections: a first section (2) near the end of the piston stroke, facing the cylinder head (at top dead center, TDC); a second, middle section (3); and a third section (4) near the end of the piston stroke, facing the crankshaft of the engine (at top dead center, TDC), wherein (i) the TDC section (2) of the liner (1) has a surface finish with a first roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”); the middle section (3) of the liner (1) has a surface finish with a second roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”);(1) the BDC section (4) of the cylinder liner (1) has a surface finish with a third roughness value defined by a structure of recesses and projections (“valleys” and “raised areas”), and the roughness value of the middle section (3) is significantly lower than the roughness value of the TDC section (2), and is defined by an essentially very smooth structure of recesses and projections (“valleys” and “raised areas”); and (ii) a ceramic coating (R) is applied to at least part of the contact surface of the piston ring (10) by the physical vapor deposition (PVD) process.
Owner:MAHLE INT GMBH +1
Pump assembly, compressor and air conditioner
ActiveCN116717470BRotary/oscillating piston combinations for elastic fluidsRotary piston pumpsCylinder headPhysics
This invention relates to the field of compressor technology, specifically to a pump body assembly, a compressor, and an air conditioner. The pump body assembly includes a cylinder and an oil guiding structure. A partition is fitted onto one side of the cylinder, and a cylinder head is fitted onto the other side. The cylinder has a vane groove for mounting a vane. A first oil groove extending axially along the cylinder is provided on the side wall of the vane groove. An oil hole is provided on the partition, opposite to the side of the vane away from the cylinder head, and the oil hole communicates with the first oil groove. The oil guiding structure guides lubricating oil to the oil hole, allowing the lubricating oil to flow into the first oil groove. A back pressure cavity is formed between the side of the vane away from the partition and the cylinder head. The oil guiding structure also guides lubricating oil into the back pressure cavity, providing a force to the vane relative to the partition. According to the technical solution of this invention, the back pressure cavity provides back pressure to the vane, balancing the axial impact of the lubricating oil in the oil hole on the vane, resulting in a more balanced axial force on the vane and thus reducing wear on the vane's end face.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Press fitting equipment for diesel engine cylinder cover and working method of press fitting equipment
The invention is suitable for the technical field of press-fitting, and provides press-fitting equipment for a diesel engine cylinder cover and a working method thereof.The press-fitting equipment comprises a workbench, a transferring assembly and a press-fitting assembly, the transferring assembly and the press-fitting assembly are installed at the top of the workbench, and a cylinder cover assembly and a placing assembly are installed at the top of the transferring assembly. In order to solve the problems that in the prior art, a worker needs to use tweezers and other auxiliary tools for alignment, the labor hour consumption is large, the initial placement position of a valve lock sheet is prone to deviation due to the fact that the auxiliary tools leave, and the valve lock sheet needs to be manually adjusted when being ejected out when a valve spring rebounds, the device is provided with an auxiliary mechanism, and the valve lock sheet is pre-filled before press fitting; during press fitting, the auxiliary mechanism moves downwards, the valve rod extrudes the positioning rod to contract, the ring body blocks the valve lock pieces, the valve rod is inserted between the two valve lock pieces, and the protrusion is clamped into the annular groove; the auxiliary mechanism moves upwards, the valve rod pulls the lock plate, finally press fitting is completed through separation, manual errors are reduced, and the situation that the valve lock plate deviates or is brought out due to lubricating oil is avoided.
Owner:CHANGZHOU KOOP POWER MACHINERY
System and method for detecting apparent defects of automobile engine cylinder cover
PendingCN121049253AAnalysing solids using sonic/ultrasonic/infrasonic wavesOptically investigating flaws/contaminationData acquisitionEngineering
The invention discloses an apparent defect detection system for an automobile engine cylinder cover, which comprises a multi-modal data acquisition module, a data fusion and processing module, a defect identification and classification module and a result output and feedback module, comprise but not limited to optical image data, ultrasonic detection data, thermal imaging data and electromagnetic induction data. According to the apparent defect detection system and method for the automobile engine cylinder cover, various apparent defects, including surface visible defects, internal hidden defects and tiny defects, of the engine cylinder cover can be comprehensively detected by fusing multiple detection technologies of optics, ultrasound, thermal imaging and electromagnetic induction, the detection precision is remarkably improved, and the missing detection rate and the false detection rate are reduced; the whole detection process is automatic, the detection time is greatly shortened through multi-modal data acquisition and parallel processing, the rapid detection requirement on a large-scale production line is met, and the production efficiency is improved.
Owner:XIANGYANG TANGFU ELECTRICAL & MECHANICAL TECH CO LTD
Crankcase ventilation system, engine and vehicle
The invention discloses a crankcase ventilation system, an engine and a vehicle. The crankcase ventilation system comprises a cylinder head cover, a ventilation device and a ventilation device, and the venturi structure is internally arranged and integrated in the cylinder head cover. According to the crankcase ventilation system, the Venturi structure is internally arranged and integrated in the cylinder head cover, and a plurality of pipelines and parts related to the Venturi structure and the cylinder head cover can also be integrated in the cylinder head cover, so that the pipelines can be saved, the space of an engine is saved, the number of parts of the engine is reduced, and the structure is simplified; the engine cost is reduced. Besides, due to the fact that a plurality of pipelines are integrated in the cylinder head cover, aging of the pipelines due to long-term use is avoided, the problems that an external pipe is prone to high-temperature aging and falling off are solved, waste gas leakage is avoided, and sealing performance is enhanced.
Owner:BYD CO LTD
Closed engine crankcase ventilation system, vehicle and control method
The invention relates to a closed engine crankcase ventilation system, a vehicle and a control method, and relates to the technical field of engine component design, the closed engine crankcase ventilation system comprises a first oil-gas separator used for being arranged on a cylinder head cover and driven by supercharged air, and the air inlet end of the first oil-gas separator is used for stretching into the cylinder head cover; the air outlet end is used for communicating with an engine air inlet pipe, and the oil outlet end is used for communicating with an oil pan so as to suck gas in the cylinder head cover, convey the gas to the engine air inlet pipe after oil-gas separation and convey oil to the oil pan; the second oil-gas separator is used for being arranged on an engine cylinder body and driven by circulating press oil in the engine cylinder body, the gas inlet end of the second oil-gas separator is used for communicating with the engine cylinder body, the gas outlet end of the second oil-gas separator is used for communicating with an engine gas inlet pipe, and the oil outlet end of the second oil-gas separator is used for communicating with an oil pan so as to suck gas in the engine cylinder body; and after oil-gas separation, gas is conveyed to an engine gas inlet pipe, and oil liquid is conveyed to an oil pan.
Owner:DONGFENG SHENYU VEHICLE CO LTD
Coating system and coating for cylinder head metal mold
PendingCN121776406AExtended service lifeHigh bonding strengthFoundry mouldsCoatingsCoating systemCylinder head
The invention relates to the technical field of cylinder covers of vehicle engines, and provides a coating system and a coating for a cylinder cover metal mold. The coating formed on the inner surface of the cylinder cover metal mold based on the coating system has the advantages that the service life of the mold coating is prolonged, and casting defects can be reduced. The coating system comprises a first material liquid and a second material liquid; the first material liquid comprises a first coating and a first solvent for dilution, and the first coating comprises the following components in percentage by mass: 20-30% of silicon dioxide powder, 10-20% of aluminum oxide powder, 1-7% of magnesium oxide powder, 35-45% of a binder, 2-8% of titanium oxide powder and 5-25% of water; the second material liquid comprises a second coating and a second solvent for dilution; the second coating comprises the following components in percentage by mass: 20-30% of silicon dioxide powder, 10-20% of aluminum oxide powder, 1-7% of magnesium oxide powder, 35-45% of a binder, 2-8% of titanium oxide powder and 5-25% of water; the dilution multiple of the first coating is greater than that of the second coating.
Owner:DONGFENG MOTOR CO LTD DONGFENG NISSAN PASSENGER VEHICLE CO
Engine and vehicle
Owner:GREAT WALL MOTOR CO LTD