14521 results about "Cylinder (engine)" patented technology

To provide a bi-fuel vehicle capable of preventing a driver from feeling bothered even in a situation where restart occurs frequently.SOLUTION: A bi-fuel vehicle is equipped with an engine 2 to which one of two types of fuel: CNG, which is gaseous fuel; and gasoline, which is liquid fuel, selected and supplied as fuel to be injected into a combustion chamber of each cylinder, and comprises an ECU 8 that controls an idling stop function that stops the engine 2 when a preset automatic stop condition is established and restarts the engine 2 when the preset restart condition is established. The ECU 8 selects gasoline as the fuel to be injected into the combustion chamber of each cylinder of the engine 2 when it is predicted that automatic stopping and restarting of the engine 2 may be repeated a predetermined number of times or more within a predetermined time.SELECTED DRAWING: Figure 1

The invention relates to the technical field of engine cylinder surface defect detection, and discloses an engine cylinder surface defect detection method and system. The method comprises the following steps: acquiring three-dimensional height information of cylinder surface defect points based on a laser displacement sensor, identifying surface defects by combining an edge detection algorithm with a standard template library, calculating geometrical characteristics of the defects by fitting a polynomial and a least square method, and finally generating a defect report and feeding back the defect report to a central control system. Compared with a detection method in the prior art that fine defects on a complex curved surface are difficult to accurately identify, and especially in a data environment with large noise, accurate detection of micron-sized defects cannot be realized, the detection method has the advantages that noise is filtered through a high-precision laser displacement sensor and Fourier transform, so that the detection accuracy is improved, and the detection efficiency is improved. Precise detection and identification of surface fine defects are realized, so that the problems of missing detection and false detection in the prior art are avoided, and the detection precision and the production efficiency are improved.

Angle adjustment mechanism for an object recognition camera, comprising a base (1) and a locking cylinder (11), characterized in that the base (1) has a rotary seat (2) rotatably connected to the inside of the base, and that the rotary seat (2) is provided with an adjustment arrangement on its top and on the base; The adjustment unit comprises a limiting toothed disk (4), wherein the limiting toothed disk (4) is fixedly connected to the bottom of the rotary seat (2), the limiting toothed disk (4) has a drive gear (5) fixedly connected to the bottom of the limiting toothed disk (4), the motor (6) is fixedly connected to the inside of the base (1), the motor (6) has a drive gear (7) fixedly connected to the end of the output shaft of the motor (6), and the left and right sides of the base (1) have a first electrical actuating element (8) fixedly connected.The telescopic ends of the two first electric actuators (8) are fixedly connected to a limiting gear plate (9), and the adjusting column (12) inside the mounting cylinder (11) is removable. There is a first electric actuator (8), the telescopic end of the two first electric push rods (8) is fixedly connected to the limiting gear plate (9), the inside of the locking cylinder (11) is removablely connected to the adjusting column (12), the top of the adjusting column (12) is rotatably connected to the adjusting plate (13), the right side of the locking cylinder (11) is fixedly connected to the mounting plate (15), the top of the mounting plate (15) is rotatably connected to the second electric actuator (6), and the output shaft of the motor (6) has an active gearbox (7) rotatably connected to a second electric push rod (16).wherein the telescopic end of the second electric push rod (16) is pivotally connected to a connecting rod (17), wherein the connecting rod (17) is pivotally connected to the adjusting plate (13).

A system for attaching a front engine of an aircraft, having: a vertical median plane, an engine pylon with a nose having a main female clevis, and a cylindrical housing around a vertical axis, a main link fastened to a front casing of the engine by a secondary ball-joint connection about a secondary axis perpendicular to the median plane by a secondary shaft, a main shaft, perpendicular to the median plane and forming a main ball-joint connection of the main link in the main female clevis about a main axis, the main and secondary axes in the plane perpendicular to the median plane, and an outer cylinder, coaxial with the vertical axis and a first end of which fastened in the cylindrical housing and a second end of which mounted, via an annular linear connection, around the vertical axis with respect to the front casing.

The invention provides a low-speed and ultrahigh-pressure die-casting process method for automobile part die-casting, and relates to the field of automobile part manufacturing. The method includes the following steps that firstly, a mold is prepared, secondly, molten metal is prepared, thirdly, a casting is cooled and demolded, and fifthly, follow-up treatment is conducted. The defects that in the high-speed mold filling process of a common high-pressure casting technology, gas is likely to be involved in the molten metal, and consequently air holes, shrinkage porosity and the like are generated in the casting are overcome; and when key parts such as automobile engine cylinder bodies and hubs are produced, air hole defects possibly cause the problems of air leakage of engines, insufficient hub strength and the like. And meanwhile, for parts with thin walls and complex structures, uniform filling of molten metal in a mold is difficult to ensure by a traditional die-casting process, the defects of cold shut, insufficient pouring and the like are easy to occur, and the qualified rate and the production efficiency of products are reduced.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The invention discloses an air cooling system of an engine and the engine, the air cooling system comprises an engine body and a cooling system, the cooling system comprises a fan assembly, and the fan assembly comprises a fan and a fan cover provided with an air outlet I; the wind scooper is used for forming a cooling air duct for cooling the engine body, and the cooling air duct communicates with the air outlet I; the flow guide piece is arranged in the cooling air duct and used for forming a cooling air branch air duct to distribute and guide the cooling air to the area, close to the air inlet side, of the cylinder head spark plug I; according to the air cooling system of the engine and the engine, the air guide cover is connected with the fan cover, so that the cooling air channel for cooling the cylinder body and the cylinder head is formed, sufficient cooling of the cylinder body and the cylinder head can be achieved, meanwhile, the cooling effect on a spark plug can be improved by arranging the flow guide piece to guide cooling air to the spark plug area of the cylinder head, and the service life of the engine is prolonged. The utilization rate of cooling air is increased, heat dissipation of all parts of the engine is uniform, and therefore the requirements for dynamic property, economical efficiency and reliability of the engine are met.

The invention provides a helicopter transmission system coaxiality detection and adjustment device and method, the device comprises a main controller 10, a laser emitter 20 and a laser receiver CCD 30, the main controller 10 comprises a computer 11 and a control box 12, after a control instruction on the computer 11 is sent, the control instruction is directly transmitted to the control box 12 through a USB interface; the laser transmitter 20 comprises a first laser transmitter 21 and a second laser transmitter 22, the first laser transmitter 21 comprises a first laser transmitter 211, a first adjusting flange 212 and a positioning cylinder 213, and the second laser transmitter 22 comprises a second laser transmitter 221, a second adjusting flange 222 and a positioning cylinder 223; the laser transmitter 20 is installed on a simulation output shaft flange plate of an engine or a main speed reducer, and the positioning cylinder 223 and the output end of the engine or the main speed reducer are installed in a positioning fit mode.

The invention discloses a double-variable power source hydraulic system of a movable arm of an electric loader and a control method, and belongs to the technical field of energy conservation of electric engineering machinery. The hydraulic system is structurally characterized in that a permanent magnet synchronous servo motor and an electro-hydraulic proportional variable device form a double-variable power source direct drive arm hydraulic cylinder; the one-way valve achieves oil cylinder and motor oil supplementing and flow reappearing functions according to the working condition of a hydraulic cylinder, the direct-acting overflow valve achieves overflow protection of a hydraulic system, and the two-position two-way electromagnetic directional valve achieves the pressure maintaining function of the hydraulic cylinder. According to the control method of the hydraulic system configuration, an upper computer outputs a target instruction to a double-variable parameter optimization controller, then the double-variable parameter optimization controller outputs an optimization rotating speed or displacement signal to a motor pump set, and a pump outlet pressure sensor feeds back a pressure signal to achieve a pressure closed loop. The energy recovery function can be effectively achieved in the aspect of configuration, the energy efficiency characteristic of a power source can be greatly improved in the aspect of a control method, and the endurance time of the electric loader is effectively prolonged.

The invention discloses a tool and method for repairing an inner ring of a flame tube of a combustion chamber of an aero-engine, and the tool comprises a base bearing which comprises a bearing plate, a bottom plate with the outer diameter larger than that of the bearing plate, and a connecting cylinder connected between the bottom plate and the bearing plate; the top plate is arranged on the bearing plate; the section of the pressing column is circular, and the diameter of the pressing column is gradually reduced from one end to the other end, so that when the pressing column presses one end of the bearing plate, the pressing column can push the top plate to move towards the outer diameter direction of the bearing plate; the cover plate comprises a supporting plate arranged on the pressing column and at least two pressing plates fixed to the periphery of the supporting plate through bolts, and the top plate is arranged between the pressing column and the pressing plates; and the adjusting bolt is used for fixing the base bearing seat, the pressing column and the cover plate and adjusting the depth of the pressing column pressed into the top plate. The inner wall of the flame tube inner ring is supported through the tool, deformation can be effectively reduced in the welding process, and the repairing quality is improved.

The invention relates to a hydraulic system of a steering mechanism, the steering mechanism and engineering machinery, the hydraulic system of the steering mechanism is used for controlling forward running steering and reverse running steering of a vehicle, and the hydraulic system of the steering mechanism comprises a hydraulic pump (1); the unloading valve group (2) is arranged on an oil supply path of the hydraulic pump (1), and the unloading valve group (2) is configured to release the pressure of the hydraulic oil; the proportional control valve group (3) is arranged on a working oil way of the unloading valve group (2), and the proportional control valve group (3) is configured to control the steering direction and the steering angle of the first steering axle (10) and the steering angle of the second steering axle (20); the flow amplification valve group (4) is arranged between the proportional control valve group (3) and the steering oil cylinder (5), the flow amplification valve group (4) and the steering oil cylinder (5) are both located on a working oil way of the proportional control valve group (3), and the flow amplification valve group (4) is configured to amplify the flow of hydraulic oil entering the steering oil cylinder (5).

A compressed air energy storage underground cavern model test system designed according to a preset joint disclosed by the present invention comprises a simulation cavern, a loading system, a measurement system and a protection device, the measurement system comprises a plurality of temperature sensors, a plurality of pressure sensors, a plurality of crack meters and a plurality of optical fiber gas sensors, and the simulation cavern comprises a steel cylinder sealed by a sealing door. A deformation simulation layer, a lining layer, a leveling layer, a geotechnical cloth layer and a flexible sealing layer are arranged on the inner wall of the steel cylinder, a plurality of longitudinal exhaust pipelines are embedded in the joint of the deformation simulation layer and the lining layer, a plurality of exhaust pipes are inserted into the cylinder wall of the steel cylinder, each exhaust pipe is communicated with one longitudinal exhaust pipeline, a plurality of longitudinal prefabricated cracks are distributed in the lining layer, and the longitudinal prefabricated cracks are communicated with the geotechnical cloth layer. A crack meter is embedded in the middle of each longitudinal prefabricated crack, and the simulation cavern is communicated with the loading system through an air inlet in the sealing door. The test system is low in cost, convenient to operate, large in scale, comprehensive in test item, high in test precision and high in reference value for actual engineering.

The invention discloses solid waste treatment equipment for construction engineering construction and a treatment method of the solid waste treatment equipment, and belongs to the field of construction engineering equipment.The solid waste treatment equipment comprises a rack, a smashing box is fixed to the rack, the smashing box communicates with a discharging hopper, a baffle is arranged in the discharging hopper in a sliding mode, and a first air cylinder used for driving the baffle to move is installed on the smashing box; a crushing box is arranged on the rack, a U-shaped frame is arranged in the crushing box, a crushing roller is rotationally arranged in the U-shaped frame through a bearing, a motor for driving the crushing roller to rotate is mounted on the U-shaped frame, a second air cylinder for driving the U-shaped frame to move is mounted on the crushing box, and the cooling mechanism is arranged on the rack and used for cooling the crushing roller. Through the arrangement of the scraping mechanism, before the crushing roller is moved to the position of the spray head for cooling, part of impurities and dust adhering to the surface of the crushing roller can be scraped through contact between the crushing roller and the brush.

The invention discloses transmission case rotating shaft torque testing equipment for simulating limit load, which relates to the technical field of sensor detection, and comprises a transmission case unit to be detected, a loading table and a lifting table, and the transmission case unit is composed of a generator, a motor shaft, a coupling, an output shaft and a diesel engine set. A driving wheel set is arranged on the loading table, a transmission case unit to be detected is placed on the loading table, a plurality of lifting hydraulic cylinders are arranged at the bottom of the lifting table, a first transmission unit and a second transmission unit are arranged on the lifting table in a sliding mode, and the first transmission unit and the second transmission unit make contact with the transmission case unit. A detection assembly is arranged between the first transmission unit and the second transmission unit, and the detection assembly detects the torque of the output shaft, the torque of the output shaft is measured on the premise that the transmission box is not disassembled, the detection efficiency of the transmission box is improved, and an operator can conveniently overhaul and maintain the transmission box.

The invention relates to the technical field of oil nozzles, in particular to an efficient atomization injection system for a direct injection oil injector in a cylinder. According to the technical scheme, an injection execution unit adopts a laser-cladded asymmetric injection hole array, fuel oil is evenly distributed in a combustion chamber through aperture gradient distribution and logarithmic spiral arrangement, and the oil-gas mixing effect is enhanced. The dynamic pressure adjusting unit is integrated with an MEMS film sensor array and a fuzzy neural network controller, a sensor can accurately monitor fuel oil pressure in real time, and the controller is based on a 7-12-3 type BP network and can rapidly and accurately adjust fuel injection pressure according to the working condition of an engine through mass data training. The fuel oil pretreatment unit comprises an ultrasonic cavitation device and a graded heating system, the ultrasonic cavitation device reduces the viscosity of fuel oil, and the graded heating system accurately controls the temperature by means of a PTC heater, a semiconductor laser and a vortex generator. The three units work cooperatively, the fuel oil atomization and combustion efficiency is greatly improved, pollutant emission is reduced, and the engine performance is remarkably improved.

The invention discloses a combustion chamber wall surface pit array structure design method and a combustion chamber. The method comprises the following steps: extracting a three-dimensional fluid model and carrying out bench test; establishing and verifying an in-cylinder combustion and emission simulation model; performing temperature field bench test on the cylinder cover, the piston and the cylinder sleeve; establishing and verifying a heat transfer simulation model; establishing a heat engine coupling simulation model; parameterization design is conducted on the pit array structures on the piston, the cylinder sleeve and the cylinder cover, a collaborative optimization mathematical model of pit array structure design is established, an optimal solution set is obtained, and typical solutions are selected; key parts in the typical solution are machined, an installation test is carried out, and the optimal pit array structure design scheme is obtained through the test. According to the pit array structure obtained through the collaborative optimization design method, the weight of components can be reduced, a turbulent layer can be formed on the near wall face of the combustion chamber to promote oil-gas mixing, then nitric oxide and particulate matter are reduced, and the combustion performance of an engine is improved.

The invention relates to the technical field of petroleum engineering downhole tools and hydraulic anchor equipment, in particular to an anchoring pressure adjustable hydraulic anchor which comprises a body with a spherical mounting cavity, a plurality of groups of elastic anchor flukes, a universal cylinder core and a flexible diaphragm. A hydraulic cavity is formed in the universal cylinder core, a flexible diaphragm is fixed to the outer side, and the elastic anchor flukes are driven through hydraulic through holes. Under hydraulic driving, the flexible diaphragm expands to push the elastic anchor flukes to stretch out to achieve anchoring. And the universal cylinder core allows angular deflection, so that the adaptability to a bent or irregular shaft is enhanced. The flexible belt is connected with the universal cylinder core and the body to adapt to deviation, and the limiting ring is arranged to prevent excessive expansion from affecting work. The upper connecting cylinder and the body are detachably connected in a sealed mode, and maintenance is convenient. By means of the design, the problem that a traditional rigid structure hydraulic anchor is poor in angle self-adaptive capacity under complex geological conditions is solved, anchoring stability and environmental adaptability are improved, and the hydraulic anchor is suitable for various complex underground conditions.

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.

The utility model relates to an experimental device for low-temperature fuel atomization of an engine in a variable environment. The experimental device comprises a high-pressure common-rail injection system, a low-temperature refrigerating system, an electronic control system, an image data acquisition system and an environment test chamber. The low-temperature refrigerating system reduces the temperature of fuel oil in the oil injector through convective heat exchange; the environment test cabin simulates the environment air pressure, temperature and humidity in the cabin according to the actual environment parameters in the cylinder in the engine operation process; and the high-speed camera shooting technology is used for obtaining spray image information of the low-temperature fuel oil in a variable environment for further comprehensive analysis of fuel oil atomization characteristics. According to the utility model, a reliable experiment means is provided for researching the fuel oil atomization condition of the fuel oil in a low-temperature state in a low-temperature environment in the cold start process of the engine, deeply analyzing the influence of a complex environment on the cold start of the engine, and seeking to improve the cold start performance of the engine.

Insulated fuel assembly core with axially arranged fuel monoliths including channels and having a composition including a fissionable fuel component, exhaust support plate, exhaust shield assembly, and insulation layer. Fuel monoliths have an eccentric cylinder shape or a right circular cylinder shape with side surface keyway. The eccentric shape and / or a keyway (with associated alignment rod) provide alignment. Channels in the exhaust support plate are oriented so propellant gas flowing from the fuel monoliths through the exhaust support plate does not impinge the exhaust shield assembly. Insulated fuel assembly cores are manufactured by forming a tensioned fuel monolith stack mandrel assembly using mandrel spacers and internal tensioning components and mandrel winding an insulation layer on an outer surface of the tensioned fuel monolith stack mandrel assembly. Insulated fuel assembly cores can be incorporated into fuel assemblies of nuclear propulsion fission reactor structures, for example, a nuclear thermal propulsion engine.

The invention discloses a welding device and method for a rocket engine jet pipe, and belongs to the technical field of aerospace engine welding. The welding device for the rocket engine jet pipe comprises a first tool used for clamping a to-be-welded scalloped segment of the engine jet pipe, a second tool used for clamping a to-be-welded barrel and a gas protection supporting cover used for conducting inert gas protection on the front face of a welding seam of the engine jet pipe. The first tool comprises a first inner supporting piece, the first inner supporting piece is sleeved with a pressing plate, and the pressing plate is provided with a first pressing structure for pressing the edge of the scalloped segment; the second tool comprises a second inner supporting piece and a third inner supporting piece which are used for supporting the barrels, and a pressing mechanism for pressing the splicing positions of the adjacent barrels is arranged outside the second inner supporting piece or the third inner supporting piece. By the adoption of the welding device and method for the rocket engine jet pipe, the problems that an existing engine jet pipe is prone to being oxidized when welded in the atmosphere, defects are generated, and the welding cost is high can be solved.

An internal combustion engine has a uniblock that defines a blind cylinder bore that terminates within the uniblock. A piston is inserted into the cylinder bore from a bottom end of the cylinder bore. Parallel first and second vertical planes extend along first and second lateral sides of the cylinder bore. A cylinder zone being defined between the first and second vertical planes. A crosshead is coupled to the piston. A first crankshaft has a first crankshaft axis that extends parallel to the first vertical plane and that is positioned outside of the cylinder zone. A second crankshaft has a second crankshaft axis that extends parallel to the second vertical plane and that is positioned outside of the cylinder zone. The first crankshaft is coupled to the crosshead with a first connecting rod and the second crankshaft is coupled to the crosshead with a second connecting rod.

The invention discloses a folding arm frame control method and system, an aerial work platform and a storage medium, and relates to the technical field of engineering machinery. The control method comprises the steps that the absolute angle of a folding arm and the telescopic length of a main arm are obtained; the current value of an oil cylinder oil return proportional valve is determined according to the absolute angle of the folding arm and the telescopic length of the main arm; and the action of an oil cylinder oil return proportional valve is controlled according to the current value, and variable control over the oil return amount of the boom oil cylinder is achieved. On the basis of not changing the electric / hydraulic hardware configuration of the existing working platform, the current value of the oil return proportional valve of the oil cylinder is determined through the detected real-time boom posture, then the hydraulic oil return quantity of the boom action oil cylinder is dynamically adjusted according to the current value, the stability of the boom in the action process is ensured, and the working efficiency is improved. And the luffing operation of the boom is safer.

A front engine attachment system for an engine having an engine pylon with a nose having a main female clevis and a cylindrical housing, a main rod fastened to the engine by a secondary ball joint connection about a secondary axis, a main shaft realizing a main ball joint connection of the main rod in the main female clevis about a main axis, wherein the main axis and the secondary axis are in the same vertical plane, a hollow outer cylinder with a vertical axis, of which a first end is fastened in the cylindrical housing and of which a second end is mounted so as to be able to move, via an annular linear connection, with respect to the front casing and an inner cylinder threaded and fastened in the outer cylinder.

The invention discloses a variable environment fuel oil atomization quality test system and test method. The system comprises a high pressure common rail injection system, a low temperature refrigeration system, an electronic control system, an image data acquisition system and an environment test chamber. The low-temperature refrigerating system reduces the temperature of fuel oil in the oil injector through convective heat exchange; the environment test cabin simulates the environment air pressure, temperature and humidity in the cabin according to the actual environment parameters in the cylinder in the engine operation process; the image data acquisition system acquires spray image information of low-temperature fuel oil in a variable environment and performs image processing, and by actually measuring the circulating oil injection quantity during fuel oil injection, the Sott average diameter is calculated according to different empirical formulas, and the fuel oil atomization characteristics are comprehensively analyzed. The invention provides a reliable experimental means for researching the fuel oil atomization condition of the fuel oil in a low-temperature state in a low-temperature environment in the cold start process of the engine, deeply analyzing the influence of a complex environment on the cold start of the engine, and seeking to improve the cold start performance of the engine.

The invention discloses a long-distance spraying dust-settling machine for engineering construction, which comprises an arranged water storage tank, a first motor is arranged in the water storage tank, a first output end of the first motor is connected with a rotating assembly, the rotating assembly is connected with a rotating seat, a second motor is arranged in a protective cylinder, and the second motor is connected with a second motor. A first air bag is arranged on the outer side of the rotating shaft and communicates with a second air bag through a pipeline, and the second air bag is arranged at the side end of the spray head. According to the long-distance spraying dust-settling machine for engineering construction, through swinging of a protective cylinder, the spraying coverage range of a spray head can be enlarged, dust settling comprehensiveness is improved, the problem that the dust settling efficiency is reduced due to insufficient driving force is solved, the output end of a second motor drives a rotating shaft to rotate, a fan on the outer side of the rotating shaft can rotate conveniently, and the dust settling efficiency is improved. And air in the first air bag is conveniently conveyed to the second air bag, so that the spray head rotates on the rotating shaft, and the dust falling effect is enhanced.

The invention belongs to ocean engineering, and discloses a seabed multifunctional freely-adjustable crawler belt which comprises a main frame, at least one pair of telescopic oil cylinders, at least one pair of outer supporting legs, at least one pair of inner supporting legs, at least one connecting rod, at least one overturning oil cylinder and at least one overturning oil cylinder connecting weldment. Wherein the main frame is hinged with the telescopic oil cylinder, the outer supporting leg and the inner supporting leg through pin shafts; the connecting rod is provided with at least three reamed holes which are respectively connected with the crawler belt assembly, the outer supporting leg and the inner supporting leg through bolts; the overturning oil cylinder is mounted on the crawler beam through the overturning oil cylinder connecting weldment and is connected with the connecting rod through the bolt; according to the invention, flexible adjustment of the crawler belt in multiple directions is realized. Particularly, due to the synergistic effect of the telescopic oil cylinder and the overturning oil cylinder, the width and height of the crawler belt can be adjusted under different terrain conditions, obstacles can be overcome through the rotating action, meanwhile, the equipment can better adapt to the complex and changeable seabed environment, and the operation efficiency and safety are improved.

The invention discloses a self-rotating cleaning nozzle for cleaning carbon deposits in an air cylinder and a piston ring of a fuel engine, and belongs to the field of engine carbon deposit cleaning. One end of the pulse rotary spraying assembly is connected with an electromagnetic valve seat, and the other end of the pulse rotary cleaning assembly can be directly installed on a spark plug hole to be connected with a combustion chamber, so that a hollow gas conveying cavity is formed. When the piston is located at the top dead center of the air inlet stroke, compressed air is injected into the air cylinder to push the piston to do work, and therefore the engine works continuously. The engine cleaning device has the beneficial effects that an engine is cleaned in the moving process, residues are discharged from the air inlet cavity channel, and the residues cannot cause secondary pollution to the space of a combustion chamber and three-way catalysis; compressed air of the sector pushes the spraying nozzle to rotate and spray out along the center shaft, 360-degree surrounding type cleaning can be conducted on the space of the combustion chamber, and no cleaning blind area is left.

The invention relates to a composite injection hydrogen internal combustion engine and an injection control method thereof, and the composite injection hydrogen internal combustion engine comprises an air inlet system, a low-pressure air inlet channel hydrogen supply system, a high-pressure in-cylinder direct injection hydrogen supply system, an ignition system and a control system, the control system dynamically adjusts the ratio of low-pressure gas inlet channel hydrogen injection to high-pressure cylinder internal direct injection hydrogen by correspondingly controlling the working states of the gas inlet system, the low-pressure gas inlet channel hydrogen supply system and the high-pressure cylinder internal direct injection hydrogen supply system, and specifically, the ratio of low-pressure gas inlet channel hydrogen injection to high-pressure cylinder internal direct injection hydrogen injection is adjusted according to the rotating speed and target power of an engine. The proportion of air inlet channel injection and in-cylinder direct injection is dynamically adjusted. Compared with the prior art, a composite double-injection mode is introduced, more accurate combustion control can be achieved, higher flexibility and adaptability are provided, the performance and combustion efficiency of the hydrogen internal combustion engine can be optimized within a wider working condition range, and the combustion stability and fuel economy of the engine are effectively improved.

A cylinder deactivation system for an engine includes an engine block defining a cylinder. A valve opens and closes a port to the cylinder. A rocker arm pivots to operate the valve. A camshaft has a cam lift and a cam-to-rocker input system transfers the cam lift through the rocker arm to the valve. A deactivation assembly is disposed in the rocker arm and is responsive to fluid pressure to alternately effect an activated state of the valve and a deactivated state of the valve.