1148 results about "Dieseling" patented technology

The invention discloses a digital twin intelligent test run system based on a marine medium-speed diesel engine and a monitoring method, relates to the technical field of monitoring, and is used for solving the problems of degeneration identification lag and low emission early warning precision of an oil injector. The system comprises a multi-source heterogeneous data preprocessing module and a running state intelligent diagnosis module. The multi-dimensional data acquisition module is used for acquiring in-cylinder pressure, crankshaft torsional vibration and transient air-fuel ratio signals to construct multi-dimensional data vectors, and the multi-dimensional data acquisition module is used for analyzing combustion fluctuation characteristics based on an attention mechanism LSTM (Long Short Term Memory) network, identifying early deterioration of an oil injector and outputting an oil injection consistency coefficient and a fault type identifier. The method comprises the steps that according to an oil injection consistency coefficient, electromagnetic valve response delay and combustion parameter correlation are tracked, a degradation trend is predicted, and emission early warning is generated; and according to prediction and early warning results, fuel injection compensation parameters are dynamically adjusted in the digital twinborn model, a recursive least square method is adopted to identify combustion parameters and feed the combustion parameters back to an electric control unit, and self-adaptive optimization and closed-loop control in the test run stage are achieved.

A center hole is formed in a base, the lower end of a guide sleeve is coaxially fixed to the upper end of the base, a lower die is installed in the guide sleeve in a matched mode, and the lower end face of the lower die makes contact with the upper end face of the base. The conical section at the upper end of the valve rod and the lower half portion of the large-diameter section are matched with a lower die hole in the upper end of the center hole of the lower die, the upper die is arranged in the guide sleeve in a matched mode, an upper die hole in the lower end of the center hole of the upper die is matched with the large-diameter section of the valve rod, and the upper end of the upper die extends out of the guide sleeve. And the upper end of the valve rod is deformed and turned inwards until the belleville spring and the maximum-diameter position of the lower end of the valve head are completely wrapped in the stepped hole of the large-diameter section of the valve rod. According to the utility model, the technical problem that the valve rod assembly of the indicator valve cannot be directly assembled is solved, the problem that the valve head is arranged in the inner hole of the valve rod and the stroke of the valve is ensured by accurately controlling the length of the inner cavity when the valve head, the valve rod and the belleville spring of the indicator valve are assembled is effectively solved, the valve rod assembly is ensured to be smoothly assembled, and the assembling quality and the processing efficiency are ensured.

A diesel engine crankshaft residual stress and deformation relation prediction method belongs to the technical field of internal combustion engine key component manufacturing. The method comprises the steps of dynamically correcting a finite element model through multi-stage measured data, performing high-precision reconstruction of a crankshaft residual stress field, establishing a quantitative relation between stress distribution and deformation, and combining numerical simulation and response surface method optimization to realize high-precision residual stress distribution prediction. And further analyzing the release and redistribution rules of the residual stress in the material removal process. Residual stress distribution is actively controlled to prolong fatigue life, and stable production of high-precision and long-life crankshafts is ensured. The grinding feeding rate is reduced through active control over residual stress in the grinding process so that the tensile stress peak value in the layer depth direction can be reduced, and meanwhile it is guaranteed that the surface roughness is within a proper interval. A gradient cooling strategy is adopted, the cooling liquid flow is increased in the initial grinding stage, and surface layer thermal stress accumulation is restrained. And the grinding wheel linear speed is controlled, and grinding efficiency and residual stress inhibition requirements are balanced.

The utility model discloses a gearbox for an oil-electricity double-engine ship. The gearbox comprises a box body, the diesel oil input component comprises a first input shaft, a first driving gear is sleeved on the first input shaft, and the first input shaft is provided with a first transmission gear and a first clutch; the reversing shaft part comprises a reversing shaft, a second driving gear is sleeved on the reversing shaft, the reversing shaft is provided with a second transmission gear and a second clutch, and the second transmission gear is meshed with the first transmission gear; the motor input component comprises a second input shaft, the second input shaft is sleeved with a third driving gear in an empty mode, the third driving gear is meshed with a first driven gear, the second driving gear is fixedly sleeved with the first driven gear, and the second input shaft is provided with a third clutch; the output shaft component comprises an output shaft and a second driven gear, and the second driven gear is meshed with the first driving gear and the second driving gear. According to the scheme, the diesel engine or the motor is independently used for driving, intelligent switching of the diesel engine and the motor can be achieved at any speed, oil consumption is reduced, and power performance is improved.

The invention discloses a hybrid energy storage power supply system for diesel engine replacement and an energy management method, and relates to the technical field of hybrid energy storage power supply and management methods. An assembly with the photoelectric conversion efficiency exceeding 23% and a 10KV-level string type inverter are adopted, and a photovoltaic-energy storage combined MPPT control function is integrated; the lithium iron phosphate energy storage system is matched with a bidirectional PCS and an active equalization technology, and is designed according to 1.5 times of daily peak-valley difference and 2 hours of emergency standby power; the diesel generating set group is started in a grading manner according to load gaps, and is matched with a 10KV / 380V intelligent charging unit; the coordination control center realizes two-dimensional prediction and coordinated scheduling based on an LSTM neural network, couples each unit through a 10KV intelligent bus system, divides load priorities, collects meteorological and equipment parameters, and constructs photovoltaic priority consumption, energy storage stabilization fluctuation, diesel generator guarantee emergency, and flexible and adjustable charging operation modes. The method has the advantages that the energy utilization efficiency is improved, the power supply stability is enhanced, the whole-cycle cost is reduced, limited operation and maintenance scenes are adapted, and diversified power supply requirements are met.

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.

The invention discloses a diesel engine piston material, a diesel engine piston casting method and a diesel engine piston, and relates to the technical field of composites.The diesel engine piston material comprises, by weight, 12.0%-12.5% of Si, 5.6%-5.8% of Cu, 3.0%-3.4% of Ni, 0.1%-0.3% of Mg, 0.1%-0.3% of Mn, 0.4%-0.6% of Fe, 0.10%-0.14% of Ti, 0.10%-0.14% of V, 0.10%-0.14% of Zr, 0.02%-0.06% of Cr and the balance Al and alkali metal impurity elements. The high-strength and heat-resistant aluminum alloy material special for the diesel engine piston is obtained by taking the aluminum alloy as a base body and coordinating multiple alloy elements and accurately regulating and controlling the proportion of all the alloy elements, the material meets the long-term service requirements of the high-load diesel engine piston at the high temperature of 350 DEG C and under the explosion pressure of 20 Mpa of 107 times or above high-frequency reciprocating loads, and the service life of the high-load diesel engine piston is prolonged. And the working conditions of high detonation pressure and thermal load of the diesel engine piston are met, so that the high-temperature mechanical property, long-term service reliability and safety stability of the piston are improved.

The invention relates to the technical field of collection equipment, in particular to a sample collection device for diesel engine gas detection. A first pipe opening, a second pipe opening and a third pipe opening are formed in the pipe body; a collecting barrel is installed in the first pipe opening, a limiting mechanism used for being connected with a flue of a diesel engine is installed on the second pipe opening, a flow monitoring mechanism is installed on the third pipe opening, and the particulate matter collecting barrel, the flow monitoring mechanism and the flue connecting mechanism are integrated on one pipe body, so that particulate matter collection and gas flow measurement are synchronously carried out; measurement errors caused by fluctuation of working conditions are greatly reduced, and the accuracy and reliability of detection data are improved.

The invention relates to the technical field of welding, in particular to a fixing mechanism of a welding machine for a diesel engine fuel tank, which comprises a first station, a second station and a third station, the second station and the third station are movably arranged on the rack and are controlled by the first driving structure to move on the rack; the sealing heads are placed on the first station and the third station, the barrel is placed on the second station, the first driving structure controls the second station and the third station to be close to each other and synchronously moves towards the first station till the two ends of the barrel are attached to the sealing heads, and assembling is completed. Therefore, the welding efficiency is ensured.

The invention relates to a diesel engine cooling mechanism which comprises a cooling tower, a heat exchange assembly, a stirring assembly, a limiting assembly and a condenser, the heat exchange assembly, the stirring assembly, the limiting assembly and the condenser are installed in the cooling tower in a matched mode, the stirring assembly is used for stirring cooling liquid in the cooling tower, and the limiting assembly is used for limiting the horizontal relative position of the lower portion of the stirring assembly and a stirring main shaft; the outer wall of the cooling tower is sleeved with a heat exchange assembly, and the heat exchange assembly communicates with the interior of the cooling tower and is used for increasing the path through which the cooling liquid passes in the same space, so that the problem that in the prior art, a stirring mechanism is difficult to stir the cooling liquid with different volume depths is solved; the diesel engine cooling mechanism can adapt to diesel engine cooling mechanisms of various specifications.

The invention discloses a natural gas-diesel oil injection switching control system of a dual-fuel diesel engine, which relates to the technical field of automatic control and comprises a data acquisition monitoring module, a fuel analysis module, a prediction control module, a control optimization module and a switching protection module. Engine operation parameter data are collected in real time through an engine sensor interface and preprocessed, and fuel dynamic proportion analysis is carried out according to different rotating speeds and load intervals of an engine by taking a preset proportion as an initial reference datum and applying an intelligent algorithm; the engine can obtain the most appropriate natural gas and diesel oil mixing proportion under various working conditions, according to an ideal gas state equation, based on pressure and temperature data, monitored in real time, in a gas supply pipeline, dynamic compensation is conducted on the gas volume flow, real-time gas supply energy is calculated, the gas supply amount can be accurately controlled in the mode, and the gas supply efficiency is improved. It is guaranteed that the engine obtains stable and accurate energy supply, and therefore stable operation of the engine is maintained.

The invention relates to the technical field of welding, in particular to a welding machine for a diesel engine fuel tank, which comprises a frame, a welding mechanism, a three-dimensional moving mechanism and a fixing mechanism, the three-dimensional moving mechanism and the fixing mechanism are mounted on the frame, and a welding gun of the welding mechanism is fixed on the three-dimensional moving mechanism and can be controlled to move. The fixing mechanism comprises a first station, a second station and a third station, the first station is fixed to a rack, and the second station and the third station are arranged on the rack in a movable mode and controlled by a first driving structure to move on the rack; the sealing heads are placed on the first station and the third station, the barrel is placed on the second station, the first driving structure controls the second station and the third station to be close to each other and synchronously moves towards the first station till the two ends of the barrel are attached to the sealing heads, and assembling is completed. Therefore, the welding efficiency is ensured.

The invention relates to the technical field of diesel engine tail gas treatment, in particular to a mining explosion-proof diesel engine tail gas treatment device which comprises a treatment box body, a tail gas inlet and a tail gas outlet are formed in the two sides of the treatment box body respectively, a splitter plate is arranged in the treatment box body, and a plurality of splitter holes are formed in the splitter plate. According to the device, the entering tail gas is uniformly shunted through the shunting plate, so that the treatment effect of the subsequent purification step is favorably improved. Tail gas often contains impurities such as oil stains and carbon deposition particles, and shunting holes are prone to being blocked after long-time operation. The through mechanism arranged in the device can be automatically started when blockage is detected, the flow dividing hole is physically dredged through the dredging rod, the airflow channel is effectively recovered, the continuity and stability of the tail gas treatment process are guaranteed, the equipment shutdown time caused by blockage is shortened, and the overall operation efficiency is improved.

A fixed connection structure of a three-section type connecting rod of a medium-speed diesel engine comprises a connecting rod body, a connecting rod upper cover and a connecting rod lower cover, the connecting rod body and the connecting rod upper cover are connected through a connecting rod short stud and a nut, and the connecting rod upper cover and the connecting rod lower cover are connected through a connecting rod long stud and a nut. Reliable cooperation of the connecting rod threaded fastener bearing fatigue and impact loads is improved by optimizing the thread tolerance, the thread root radius and the stud outer diameter requirements of the connecting rod upper cover and the connecting rod short stud. By means of precise thread tolerance fit and optimized tooth bottom arc radius design, fatigue strength and impact resistance of threaded connection are remarkably improved, the problem that traditional connecting rod threaded connection is prone to loosening and failure is solved, and the connecting rod is suitable for the high-load working condition of a high-power medium-speed diesel engine.

The invention provides a piston crown, a piston and a diesel engine, the piston crown comprises a piston outer surface layer, a piston inner surface layer and a filling layer, the piston outer surface layer and the piston inner surface layer define a containing space, and the containing space is filled with the filling layer; the filling layer comprises a plurality of crystal lattice structures, at least one liquid inlet and at least one liquid outlet which are communicated with the containing space are formed in the inner surface layer of the piston, and first cooling flow channels are formed among the liquid inlets, gaps among the crystal lattice structures in the filling layer and the liquid outlets; the first cooling flow channel is configured in the mode that cooling lubricating oil can flow into the containing space through the liquid inlet and flow to the liquid outlet through gaps between the lattice structures to flow out.

The invention relates to the technical field of ship equipment, in particular to a method for calculating the impact resistance of a diesel engine turbocharger. Comprising the following steps that finite element modeling is conducted on a rotating part, a gas compressor part, a turbine part and an intermediate bearing part of the turbocharger, and overall model modeling is conducted; modal calculation is conducted on a fixed part, a rotating part and the whole of the turbocharger, and whether the modal of the turbocharger meets the requirement within the rotating frequency or not is analyzed; determining an impact load spectrum of the turbocharger, and converting the impact load spectrum into a time domain impact load; calculating and analyzing that the base bolt only bears the pre-tightening force; calculating and analyzing the overall impact response of the supercharger, including calculating and analyzing the structural strength, the acceleration response and the displacement response; evaluating the structural strength of the supercharger assembly and the impact resistance of the gap between the shell and the blade; through the mode, the shock resistance of the diesel engine turbocharger is accurately and effectively calculated, and the performance of the diesel engine turbocharger in a complex impact environment can be comprehensively evaluated.

This invention relates to the field of assisted welding, and discloses a welding fixture for a single frame piece of a V-type air-cooled diesel engine and its process. The fixture includes a base and a controller. The base has a horizontal support surface for supporting the single frame piece, and a positioning block that engages with the inclined surface of the single frame piece is provided on the horizontal support surface. An adjustment mechanism is provided on the horizontal support surface for adjusting its posture. The adjustment mechanism includes: a clamping assembly, disposed on the horizontal support surface, for clamping and fixing the single frame piece; a lifting assembly that allows the horizontal support surface to rise relative to the upper surface of the base and to deflect along the horizontal support surface; and a driving assembly that drives the horizontal support surface to deflect during welding, thereby changing its posture. This invention achieves posture adjustment of the single frame piece during the welding process through the adjustment mechanism, thereby fully exposing the welding interface, improving welding quality, and allowing for staged cleaning of welding slag.

The mining crawler-type carrier based on the explosion-proof diesel engine comprises a crawler chassis and crawler frames, the crawler frames are arranged on the two sides of the crawler chassis, a driving wheel and a driven wheel are installed at the two ends of each crawler frame respectively, and a plurality of thrust wheels are installed on the bottom side of each crawler frame; the chain plate is provided with a bending protrusion structure with a specific angle, the material conveying efficiency is effectively improved, material adhesion and blockage are prevented, an intelligent cooperative control system is adopted, automatic machine following operation and precise discharging of the heading machine are achieved, the operation automation degree is greatly improved, and the automatic material conveying system is suitable for being used in the heading machine through a multiple sensing system and an intelligent analysis algorithm. Real-time monitoring, fault early warning and service life prediction of the equipment state are realized, and the equipment reliability is remarkably improved.

The utility model discloses a lighter similar to a diesel engine, which comprises a protective shell, decorating parts are arranged on the front surface, the rear surface and the right surface of the protective shell, a bearing is fixedly connected to the surface of the decorating part on the rear surface of the protective shell, a gyro wheel is rotatably connected to the surface of the bearing, and a fire outlet pipe is fixedly connected to the left surface of the protective shell. A fire behavior limiting cover and a shell sealing cover are arranged at the upper end of the fire outlet pipe and the upper end of the protective shell correspondingly, a button is arranged on the surface of the shell sealing cover, a fuel storage box and an electric igniter are arranged in the protective shell, a valve is arranged on the right surface of the fuel storage box, and a right-angle guide pipe is arranged in the valve. The output end of the electric igniter and the surface of the right-angle guide pipe are provided with a power line and a rubber sleeve correspondingly, and the upper surface of the valve is rotationally connected with a winding rod. By means of the structure, the compactness of internal components of the lighter is improved, and a user can conveniently replace a power line of a fire outlet area.

The utility model discloses marine diesel engine nozzle alloy steel bar production equipment which comprises a base, a U-shaped frame is fixedly connected to the upper surface of the base, and a cutting assembly is arranged in the U-shaped frame. The cutting assembly comprises an electric hydraulic push rod installed in an installation hole formed in the upper surface of the U-shaped frame, a built-in plate fixedly connected to the end of an output shaft of the electric hydraulic push rod and a balance weight plate arranged on one side of the built-in plate, a barrier plate is arranged above the built-in plate, and the barrier plate is fixedly connected to one side of the balance weight plate. According to the cutting device, the diesel engine nozzle alloy steel bar can stop moving after moving to a proper position, the cutting procedure of the diesel engine nozzle alloy steel bar is completed by moving the rotating cutting disc downwards, the cutting position of the bar can be adjusted, the cutting device is suitable for cutting bars of different lengths, clamping and fixing of the alloy steel bars of different sizes are achieved, and the working efficiency is improved. And the universality and adaptability of the cutting equipment are further improved.

The invention relates to a method for judging whether SCR (Selective Catalytic Reduction) aftertreatment of a road diesel vehicle is normal or not. When the working condition of the diesel engine is dynamically changed, the change rule of the O2 and CO2 concentration at the SCR inlet and the NOX concentration along with time has similarity; after exhaust gas enters a normally-working SCR catalytic box, NOX is reduced and changes, O2 and CO2 are not changed, and the similarity of the change rule of the NOX concentration of an SCR outlet and the O2 and CO2 concentrations along with time is damaged. According to the method, whether the SCR works normally or not is comprehensively judged according to the concentration EO2 (t) of O2 and CO2 at an SCR aftertreatment outlet and the correlation coefficient of the ECO2 (t) and the NOX concentration ENOx (t). The dynamic working condition comprises the steps of idling of the diesel vehicle, rapid acceleration, maintaining of the maximum rotating speed and idling returning; measuring the concentration of O2 and CO2 and the concentration of NOX at a post-treatment outlet of the SCR, calculating a correlation coefficient, and comprehensively comparing and judging the working state of the SCR. According to the method, the problems that whether the SCR works normally or not is difficult to judge and misjudgment is easy due to the fact that NOX data at the SCR aftertreatment inlet of the diesel engine are difficult to obtain are solved.

The invention relates to the field of coal mine safety production management, and discloses a coal mine diesel engine tail gas explosion-proof fence cleaning operation management method and system, and the method comprises the steps: obtaining the cleaning historical data of an explosion-proof fence, the real-time exhaust pressure of diesel engine tail gas, the accumulated operation time of a diesel engine, and the underground environment parameters of an area where the explosion-proof fence is located; the scaling risk of the explosion-proof fence is evaluated, the priority of the cleaning task is allocated according to the scaling risk, and the estimated consumption of the cleaning agent is calculated according to the scaling risk and the priority of the cleaning task; the estimated consumption of the cleaning tasks with the priorities higher than the preset level in the future preset time period is gathered to form gathered consumption, the gathered consumption is compared with the current cleaning agent inventory, replenishment early warning is triggered, and a replenishment instruction or an inter-region allocation suggestion is sent out according to the replenishment early warning and in combination with the cleaning agent transportation period. The problem of inventory management failure caused by cleaning agent consumption mode change in the prior art is effectively solved.

The application discloses a diesel engine diesel filter monitoring method, relates to a diesel engine, obtains an oil inlet pressure at an oil inlet joint of a diesel filter and an oil outlet pressure at an oil outlet joint, calculates an oil inlet and outlet pressure difference according to the oil inlet pressure and the oil outlet pressure, compares the oil inlet and outlet pressure difference with a preset pressure difference early warning value, and if the oil inlet and outlet pressure difference is greater than or equal to the pressure difference early warning value, filter element alarm information is generated to produce an alarm prompt for replacing the diesel filter; a diesel oil product detection value of the oil outlet joint is obtained, and the diesel oil product detection value is compared with a preset early warning oil product value; if the diesel oil product detection value is less than the early warning oil product value, diesel oil product unqualified information is generated. The application further discloses a diesel engine diesel filter monitoring device. The application realizes automatic replacement of the filter element, reduces maintenance cost, and can well control the filter element from being overdue for maintenance, thereby reducing a fuel equipment failure rate.

This invention provides a fuzzy inference method and system for the initial phase of a low-speed engine crankshaft. The method includes: constructing an angle measuring device; calculating the state of each magnetic induction sensor in each phase interval based on the angle measuring device to form a state list; acquiring the actual state of the magnetic induction sensor and comparing it with the state list to obtain the phase interval corresponding to the actual state; and calculating the initial phase of the low-speed engine crankshaft, thereby realizing fuzzy inference of the initial phase of the low-speed engine crankshaft. This invention, based on a combination of multiple magnetic induction sensors, determines the state of the sensors in each phase interval to form a state list, compares and matches the actual state of the sensors with the state list to obtain the phase interval, and calculates the initial phase of the crankshaft, thus realizing fuzzy inference of the initial phase of the crankshaft. This is used to determine the initial phase angle of the crankshaft of an electronically controlled diesel engine after the system is powered on, so that the electronic control system can obtain the initial crankshaft position before the initial start control of the diesel engine.

The application discloses a non-damage dismounting device for a diesel engine cylinder cover valve seat and a use method, which comprises an adjustable abutting piece, a linkage piece and a knocking piece; the adjustable abutting piece is used for extending into a to-be-dismounted valve seat and abutting against the inner side of the to-be-dismounted valve seat, the linkage piece is arranged between the adjustable abutting piece and the knocking piece, and the knocking piece is used for intermittently knocking the linkage piece, so that the linkage piece drives the to-be-dismounted valve seat to separate from the diesel engine cylinder cover. The adjustable abutting piece is extended into the to-be-dismounted valve seat and is in contact with the inner side of the valve seat, then the knocking piece knocks the linkage piece, the linkage piece drives the adjustable abutting piece to intermittently knock the valve seat upward to separate from the diesel engine cylinder cover. The device does not need to weld an iron block to the valve seat, thereby avoiding that the diesel engine cylinder cover bears high temperature in a local part and is scrapped and cannot be continuously used, and simultaneously reducing the artificial labor intensity and being convenient to use.

The application discloses a diesel engine fault identification method and device. In the method, first, a first vibration signal of the diesel engine is collected; then, information entropy of the first vibration signal is calculated to obtain an entropy value corresponding to the first vibration signal; finally, the entropy value is identified through a fault identification model to obtain a fault identification result of the diesel engine, wherein the fault identification model is obtained by training a preset identification model according to entropy values corresponding to vibration signal samples of the diesel engine in multiple states and state labels of the entropy values. It can be seen that the method takes the entropy value corresponding to the vibration signal of the diesel engine as a characteristic parameter, effectively represents different states of the diesel engine, and can more accurately identify the fault of the diesel engine based on the more obvious entropy value, thereby improving the accuracy of diesel engine fault identification.

This invention discloses a composite gating system and casting method for a lightweight, high-strength, and tough diesel engine cylinder head. The composite gating system includes a sprue, a runner, a stepped ingate, and a top riser. The lower end of the sprue is connected to the runner. The runner is connected to the stepped ingate. The stepped ingate includes a bottom ingate and a middle ingate. The bottom ingate extends downward from the runner and connects to the lower part of the diesel engine cylinder head cavity. The middle ingate extends from the runner and connects to the middle part of the diesel engine cylinder head cavity. The top riser is located at the hot spot of the diesel engine cylinder head, and auxiliary risers are also provided in some hot spot areas. This invention addresses the characteristics of medium-entropy eutectic alloys, such as high melting point, poor fluidity, easy oxidation, and narrow solidification range, by designing a dedicated composite gating system and supporting casting process. This solves the shortcomings of traditional diesel engine cylinder heads in terms of lightweight, strength, toughness, and high-temperature performance, providing a reliable guarantee for improving the overall performance of diesel engines.

The utility model discloses an explosion-proof diesel engine trackless rubber-tyred vehicle door opening brake protection device which comprises a door opening control valve, a parking brake, a booster pump, a control valve and a safety control device, and the door opening control valve is connected with the safety control device, the booster pump, the control valve and the parking brake through a brake pressure pipeline. Through the fixing mechanism with unique design, the opening process of the cover is greatly simplified, an operator only needs to pull the sliding block upwards to enable the first clamping block to be separated from the first clamping groove, then pulls the side plate outwards to enable the second clamping block to be separated from the second clamping groove, and then the cover can be taken down; and then internal parts of the door opening control valve can be maintained, a wide operation space is provided for maintenance and overhaul of the internal parts such as the door position feeler lever, the clamping ring and the control valve element, and compared with the prior art, the maintenance time is remarkably shortened, the labor cost is reduced, and the equipment maintenance efficiency is greatly improved.

The utility model discloses a heating system for emergency maintenance of a diesel engine. The heating system comprises a storage tank for storing lubricating oil or cooling water, a heating device for heating the storage tank, and a conveying pipeline for conveying the lubricating oil or the cooling water into or out of the storage tank, the heating device comprises an electric heating cable; the electric heating cable is uniformly wound on the periphery of the storage tank; the conveying pipeline comprises a driving pump, a conveying pipeline body and an inlet and outlet pipe, the driving pump is arranged on the conveying pipeline body, the first end of the conveying pipeline body is connected with the storage tank, and the inlet and outlet pipe is connected with the second end of the conveying pipeline body. The storage tank, the heating device and the conveying pipeline are arranged in a matched mode, the stability of discharging and feeding of lubricating oil and cooling water of the emergency diesel engine is guaranteed, the lubricating oil and the cooling water are kept at the optimal working temperature, the emergency diesel engine set can rapidly enter the optimal working condition after being overhauled, and safe production of a power plant is guaranteed.

The application provides a DPF regeneration control method and device, electronic equipment and storage medium, relates to the engine technical field, and the DPF regeneration control method comprises: acquiring a vehicle working condition; acquiring a particulate matter trap front temperature; acquiring a particulate matter oxidation catalyst front temperature; judging whether the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach a preset temperature condition; if the particulate matter trap front temperature and the particulate matter oxidation catalyst front temperature reach the preset temperature condition, judging whether the vehicle working condition reaches a preset working condition; if the vehicle working condition reaches the preset working condition, controlling the particulate matter trap to carry out specific regeneration. To some extent, the safety of the diesel particulate filter regeneration is improved, the failure rate of the diesel particulate filter burning is reduced, and the service life of the diesel particulate filter is prolonged.