743results about How to "Reduce fuel consumption" patented technology

The invention discloses a vehicle idling start and stop control system and method. The control system judges whether a vehicle has idling start and stop conditions by monitoring the water temperatureof an engine, the capacity of a storage battery, a safety belt and other information, judges whether the vehicle has conditions of stopping the engine by monitoring the rotating speed of the engine, the speed of the vehicle, the brake air pressure and other conditions, and judges whether the vehicle has conditions of starting the engine by monitoring the gear of a gearbox, the speed of the vehicle, a hand brake and other information. When the relevant conditions are met, start and stop work signals are sent to the engine though a CAN bus. In order to guarantee the reliability of frequent startand stop of the engine, the system strengthens flywheel gear rings of a starter and the engine. In order to ensure that the battery does not lose power, a storage battery capacity sensor is added tothe system on the basis of increasing the capacity of the storage battery, and the idling start and stop are allowed when the state of charge (SOC) of the storage battery satisfies a safe starting threshold. The idling start and stop control system has advantages of low cost and high reliability, and is especially suitable for commercial vehicles.

The invention discloses a logistics park vehicle path planning method and system, and the method comprises the steps: obtaining the real-time position and task state information of a vehicle in a park, dynamically constructing a vehicle path planning network model, dividing a road into nodes and edges, and forming a directed weighted graph; according to the directed weighted graph, an improved multi-lane algorithm is adopted, the path length, the congestion degree and the vehicle characteristic factors are comprehensively considered, and the optimal path of each vehicle is calculated; for the optimal path, introducing a virtual lane and a time dimension, pre-judging occupation conditions of multiple vehicles on the virtual lane for each time slice, and constructing a conflict constraint matrix; obtaining park high-precision map data, extracting road network topology, lane lines and traffic sign marking elements, performing lane-level refinement on the optimal path, and generating a driving track; and through a multi-sensor fusion positioning technology, obtaining high-precision position and attitude information of the vehicle, matching the high-precision position and attitude information with the driving track, and calculating a track tracking error.

The invention discloses an intelligent navigation system and method for a ship in the technical field of ship navigation, and the system comprises a sensing module which is used for collecting the surrounding environment information and the state information of the ship in real time; the data processing and fusing module is used for preprocessing, calibrating and fusing the surrounding environment information and the self state information of the sensing module; the route optimization module is used for formulating a navigation plan and a collision avoidance strategy; the navigation control module is used for autonomously controlling the ship according to the output of the ship route optimization module; and the communication monitoring module monitors the navigation state of the ship and the change of the surrounding environment through real-time communication between the ship and a shore-based control center, other ships and a maritime affair management department. According to the method, data of different sensing units are associated, and the associated data are fused, so that mutual verification and complementation can be realized, and the accuracy and reliability of target identification are improved.

The invention discloses a visual network freight platform transportation transaction management system. The system comprises an order management module, a vehicle scheduling module, a transportation monitoring module, a transaction settlement module and a visual display module. Each module has innovative functions, such as order intelligent classification, vehicle optimization scheduling algorithm to minimize comprehensive cost, real-time monitoring and accurate settlement. The corresponding management method adopts advanced technologies to ensure efficient operation of each link, including block chain recording, intelligent contract settlement and the like. The whole system realizes efficient management, real-time monitoring and convenient visualization of transportation transaction of a freight platform, and improves the efficiency and quality of logistics transportation; according to the visual network freight platform management system, efficient and accurate order management is realized, vehicle scheduling is optimized, the cost is reduced, comprehensive and real-time transportation monitoring is guaranteed to be safe, safe and accurate transaction settlement is realized, convenient and visual display is convenient to make decisions, and the logistics transportation efficiency, quality and user experience are improved.

The invention relates to the technical field of ballast water, in particular to a ship ballast water comprehensive treatment system which comprises a ballast water dynamic adjustment module, a ballast water risk management module, a ballast water safety optimization module and a ballast water ecological monitoring module. According to the invention, by monitoring the key sea condition data and the ship state in real time, the ballast water configuration can be adjusted in real time, and the balance and operation flexibility of the ship can be optimized, so that the ship can be kept stable in a changeable marine environment, the extra fuel consumption caused by improper configuration of the ballast water is obviously reduced, and the service life of the ship is prolonged. Potential risks in ballast water are intelligently assessed through the Bayesian network, the system can early warn the risks in advance and formulate coping strategies, so that the safety of the ship is improved, ecological threats are recognized in time through careful monitoring and analysis of biological and chemical components of the ballast water, the cross-regional spreading risk of pests and pathogens is reduced, and the risk of risk prevention and treatment is reduced. The ecological safety and the biological diversity of the destination water area are effectively protected.

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 discloses a path planning method and system for a road maintenance vehicle, and relates to the technical field of artificial intelligence, and the method comprises the steps: collecting the multi-modal data of the road maintenance vehicle through a sensor and a 5g network, uploading the multi-modal data to a cloud data center, and carrying out the multi-modal data fusion; based on the fused multi-modal data, quickly calculating an optimal path set by using a quantum optimization algorithm; executing the maintenance task; for the road maintenance vehicle executing the task on the road, the cloud data center continuously receives feedback data; after the task is completed, the cloud data center gathers the operation data of the road maintenance vehicle and carries out deep analysis. The multi-modal sensor and the 5G technology are integrated, the environment is monitored in real time, the optimal path is calculated and dynamically adjusted through quantum optimization and the CADPOA algorithm, tasks are automatically executed, path planning is continuously optimized through a feedback mechanism, continuous and efficient maintenance work is achieved, and continuity and high quality of the maintenance work are guaranteed.

The invention relates to the technical field of energy conservation and carbon reduction in metallurgy, and provides a low-carbon sintering flue gas circulation system and purification process for multi-pollutant collaborative treatment, the low-carbon sintering flue gas circulation system and purification process are used for staged treatment of sintering flue gas, and the low-carbon sintering flue gas circulation system comprises a sintering chamber which is provided with a sintering cavity and a flue gas blowing port; the sintering cavity leads to the high-sulfur air duct or the low-sulfur air duct, and the low-sulfur air duct leads to the flue gas blowing port; and the high-sulfur air duct leads to the first flue gas treatment system. By means of the technical scheme, the problem that in the prior art, energy consumption for treating flue gas generated after sintering of sintering ore is high is solved.

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

The invention provides a methanol preheating and catalytic cracking system for a methanol engine, a ship and a control method, and belongs to the technical field of ship methanol engines. The problems that an existing methanol engine is difficult in cold start and methanol gasification are solved. The system comprises a methanol engine, a methanol storage tank, a water storage tank, a heat exchanger, an inlet temperature sensor and an outlet temperature sensor, one passage of a third three-way valve is connected with the waste gas output end of the methanol engine, the other passage of the third three-way valve is connected with another cooling water pipeline, and the methanol output end of the heat exchanger is connected with the methanol input end of the methanol engine. The methanol input end is connected with the methanol storage tank, a methanol pump is arranged on a methanol conveying pipeline between the methanol storage tank and the heat exchanger, two passages of the first three-way valve are arranged between the methanol conveying pipelines, and the inlet temperature sensor and the outlet temperature sensor are respectively arranged at a methanol inlet and a methanol outlet of the heat exchanger. The method is mainly used for starting the methanol engine.

The invention provides a rotating speed self-adaptive control method and device for a marine diesel engine, and relates to the technical field of rotating speed control, and the method comprises the steps: carrying out the ship route fitting according to the shipping scheduling of a diesel engine driven ship, and obtaining a voyage sequence; carrying out load change calculation to obtain a local load sequence; taking the voyage time consumption constraint as a distribution constraint, carrying out voyage time consumption distribution optimization, and obtaining a local time consumption sequence; performing navigational speed optimization to obtain a target navigational speed sequence; performing diesel engine rotating speed coupling calculation according to the target navigational speed sequence to obtain a diesel engine rotating speed control sequence; and performing self-adaptive dynamic regulation and control on the diesel engine driven ship by adopting the diesel engine rotating speed control sequence. The technical problems that in the prior art, the rotating speed of the diesel engine is adjusted by crew according to experience, a refined automatic control mechanism is lacked, and the change of ship load environment conditions cannot be dynamically responded, so that the operation efficiency and the energy consumption of the whole voyage are difficult to be optimal are solved.

The invention discloses an engine control method and a related device, and relates to the field of engines, an engine is provided with two EGR branches which are respectively connected with a large turbine runner and a small turbine runner, an engine controller determines a corresponding target EGR rate based on target performance parameters of the engine, a small runner EGR valve is controlled to be opened, and the small runner EGR valve is controlled to be closed. If the target EGR rate can be reached by only opening the small-flow-channel EGR valve, outputting a corresponding first target small-flow-channel EGR valve opening degree, and if the opening degree of the small-flow-channel EGR valve reaches the first set maximum opening degree and the corresponding EGR rate does not reach the target EGR rate, controlling the large-flow-channel EGR valve to be opened to reach the target EGR rate, and outputting a corresponding second target small-flow-channel EGR valve opening degree and a target large-flow-channel EGR valve opening degree. Two-way EGR gas taking is achieved by controlling the opening degree of the two-way EGR valve, the EGR rate is improved, meanwhile, the pumping loss and the rotating speed of the supercharger are reduced, and therefore oil consumption and NOx emission are reduced.

The invention aims to provide an aircraft propulsion system which comprises an energy storage unit and a tail fan assembly, the energy storage unit is arranged in an aircraft body, the tail fan assembly is arranged at the tail of an aircraft, and the tail fan assembly comprises a first driving unit, a tail fan rotor and a tail fan stator. The first driving unit is electrically connected with the energy storage unit, the tail fan rotor is arranged on the periphery of the tail of the aircraft and is in transmission connection with the first driving unit, and the tail fan stator is arranged on the periphery of the tail of the aircraft. The tail fan stator is closer to the rear end of the aircraft than the tail fan rotor. By adopting the aircraft propulsion system, the propulsion efficiency of the existing aircraft can be improved, and the fuel consumption of the aircraft in the whole voyage can be reduced.

The invention discloses a wide-adaptability variable-geometry turbine of a variable-cycle aero-engine and a flow adjusting structure of the wide-adaptability variable-geometry turbine of the variable-cycle aero-engine, a turbine guider in the structure is integrally arranged at the upstream position of a turbine rotor and is provided with a plurality of guider blades, each blade is provided with a front cavity and a rear cavity, the cavities are connected with the last stage of an air compressor through an air entraining connector, and the air entraining connector is connected with the tail stage of the air compressor. And high-pressure airflow is guided in. The suction face front airflow nozzle and the pressure face tail airflow nozzle are used for jetting airflow to the main flow channel, the pneumatic blocking effect with the local flow speed reduced is formed, and the throat area and the airflow angle characteristic of the guider are adjusted. The airflow adjusting device comprises a flow adjusting valve and a pressure adjusting valve, the flow and pressure of airflow are controlled, the airflow injection characteristic is accurately adjusted, and the turbine flow and efficiency are optimized. The turbine flow adjusting precision can be effectively improved, the mechanical complexity is reduced, the turbine efficiency is improved, the service life of an engine is prolonged, the requirements under different flight working conditions are met, and the important application value is achieved.

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 thermal management system and method for a hybrid power ship, and relates to the technical field of ship power. The seawater heat exchanger is respectively connected with a motor system cooling loop, a battery heat management loop, an engine heat management loop and a seawater heat pump loop; the seawater heat exchanger is used for performing heat exchange on the heat absorption cooling liquid and seawater; the motor system cooling loop is configured to cool the motor system and provide heat for the battery thermal management system to raise the temperature; the battery heat management loop is configured to perform heat exchange on the battery so as to enable the battery to be within a preset temperature range; the engine heat management loop is configured to conduct heat exchange on the engine so that the engine can be within the preset temperature range, and heat is provided for the battery and the air conditioner warm air core body; the seawater heat pump loop is configured to provide heat for temperature rise of the battery heat management loop and the engine heat management loop; each part can be accurately controlled to operate at the optimal temperature; and oil consumption and emission are reduced.

The invention relates to the technical field of gearboxes, in particular to an electric gearbox assembly which comprises a box body and a motor, a power transmission shaft is arranged at the power output end of the motor, an intermediate shaft is arranged in the middle of the box body, a synchronous gear ring is slidably connected to the middle of the intermediate shaft, a power output shaft is arranged in the middle of the lower end of the box body, and a shifting gear shifting mechanism is arranged in the middle of the box body. The shifting gear shifting mechanism is composed of a mounting column, a second spring, a second steel ball, a four-wheel-drive shifting fork, a locking column and a sleeve, the box body is formed by splicing a left box body and a right box body, transmission flanges are fixedly connected to the two ends of the power output shaft, and a motor connecting cover is fixedly connected to the connecting position of the left side of the box body and the power transmission shaft; a gear shifting rotating arm is rotationally connected to the outer side of the box body, the two ends of the gear shifting rotating arm penetrate through the box body, and a rocker arm plate is fixedly connected to the upper end of the gear shifting rotating arm.

The invention relates to a control method, device and equipment of an electromagnetic clutch and a medium, the two ends of the clutch are used for being connected with an engine and a driving motor respectively, when the clutch is engaged, a corresponding vehicle is in a common driving state of the engine and the driving motor, and when the clutch is disengaged, the corresponding vehicle is in an independent driving state of the driving motor. The control method comprises the steps that whether the vehicle speed meets the clutch connection or disconnection condition or not is judged; if yes, the engine is adjusted to the optimal oil consumption working condition, and the optimal oil consumption working condition corresponds to the area on the universal characteristic curve of the engine; the clutch is engaged or disengaged. According to the scheme, the engine is firstly adjusted to the optimal economic oil consumption working condition, then the clutch is engaged or disengaged, the problems that in the prior art, clutch engagement or disengagement consumes long time and is low in efficiency are solved, and oil consumption is effectively reduced.

The invention provides a heat dissipation device and a vehicle, and belongs to the technical field of vehicle cooling systems, and the heat dissipation device comprises a heat dissipation shell, a filter assembly, a fan and a heat dissipation device body. A heat dissipation air channel is formed in an inner cavity of the heat dissipation shell. An air inlet is formed in the bottom of the radiating shell, and an air outlet is formed in the top; the filtering assembly is arranged at the air inlet and covers the air inlet; the fan is arranged at the air outlet and covers the air outlet; and the radiator main body is arranged in the radiating air channel. According to the heat dissipation device provided by the invention, the filter assembly can filter impurities so as to prevent the radiator main body from being blocked or damaged by collision; the heat dissipation shell, the filtering assembly and the fan are combined, so that the heat dissipation air channel can form a relatively closed space, the air speed and the air volume passing through the heat dissipation air channel are increased, and the heat dissipation efficiency is improved; the air inlet is formed in the bottom of the heat dissipation shell and does not need to cover the whole heat dissipation shell, so that the requirement for the opening area of the front bumper is not high, the opening position can be lowered, the wind resistance of the whole vehicle can be reduced, and oil consumption is reduced.

A parking heater relates to the technical field of heaters and comprises a burner (1), a heat exchange fan (2) and a shell (3) wrapped outside, the shell (3) is provided with a preheating pipeline (9), an air inlet (10) of the preheating pipeline (9) is arranged at a hot air outlet (8) of the shell (3), and an air outlet (11) of the preheating pipeline (9) is arranged at a cold air inlet (7) of the shell (3) and in front of the heat exchange fan (2). By arranging the preheating loop, the temperature of the engine body and the temperature of rib combustion air participating in combustion are rapidly increased, and fuel oil can reach the optimal combustion state in a combustion chamber in a short time, so that the heating efficiency is improved, the preheating time of the engine body is shortened, the fuel oil consumption is reduced, and the purposes of energy conservation and emission reduction are achieved.

The invention discloses a low-emission and low-oil-consumption control method for a national seven diesel engine, which relates to an engine control technology and comprises the following steps: acquiring the running state and the post-processing regeneration state of a vehicle, and determining the running mode of a 48V system of the vehicle according to the running state and the post-processing regeneration state; the operation modes comprise a charging mode, a power assisting mode, a reheating mode and a light heating mode; when it is detected that the vehicle is in a DPF running regeneration state and the SOC of the power battery is larger than or equal to the minimum threshold a1, a 48V system of the vehicle enters a reheating mode; and when the SOC of the power battery is larger than or equal to the minimum threshold a1 and the temperature T6 at the outlet of the DPF is smaller than a set first temperature threshold, the 48V system of the vehicle enters a light heating mode. The invention further discloses a control device of the national seventh diesel engine with low emission and low oil consumption. According to the invention, the dynamic property of the vehicle is improved, the energy consumption is reduced, the problem of low SCR conversion efficiency under a low-temperature environment and a small-load working condition is solved, and ultralow NOx emission is realized.

The invention provides a thermal power generating unit energy efficient utilization system coupling solar energy and fused salt heat storage, which comprises a boiler, a steam turbine and a regenerative air exhaust system, the boiler is used for generating steam input into the steam turbine, an outlet of the steam turbine is connected with the regenerative air exhaust system, and the thermal power generating unit energy efficient utilization system further comprises a solar fused salt multi-stage heat exchange system; the solar fused salt multi-stage heat exchange system comprises a solar heat collector, a multi-stage heat exchange system and a pumping system. The solar heat collector and the multi-stage heat exchange system form a closed loop through the pumping system; a medium conveyed by the pumping system is fused salt; and at least one stage of heat exchange system is used for reducing the steam extraction amount of a steam turbine in the regenerative air extraction system by preheating condensate water entering the boiler. According to the invention, gradient utilization of solar energy is realized, the steam extraction amount of the steam turbine is reduced, and the time of a starting-grid connection process of a unit is shortened.

The invention discloses an airflow circulation type high-speed suction sweeping vehicle which comprises a chassis, a garbage can body, a power distribution assembly and a sweeping suction cup assembly, the garbage can body comprises a clear water tank and an airflow circulation box, and the airflow circulation box comprises a fan cabin used for containing a fan; an air outlet of the fan is communicated with the positive pressure airflow channel, an air inlet of the fan is communicated with the negative pressure airflow channel, the positive pressure airflow channel and the negative pressure airflow channel are both communicated with the cleaning suction cup assembly, the power distribution assembly comprises a power take-off transfer case, and a total power input port of the power take-off transfer case is connected with the gearbox. A plurality of power output ports of the power take-off transfer case are respectively communicated with the rear drive axle and the fan; the power take-off transfer case takes out all power of the chassis engine and distributes the power into multiple paths to be output, under the condition that the whole vehicle driving requirement is met, the airflow circulation box is driven to generate positive pressure airflow and negative pressure airflow to increase the road surface garbage suction and conveying speed, and therefore the whole vehicle power configuration is reduced, and oil consumption, noise and use cost are further reduced.

The invention provides a ship navigation performance optimization method and system considering uncertain variables, and the method comprises the steps: calculating ship oil consumption and ship energy efficiency operation indexes based on obtained ship operation parameters and port parameters, calculating an actual navigation speed value interval through employing a 3sigma criterion, taking the actual navigation speed value interval as a constraint condition, and carrying out the optimization of the ship navigation performance. Establishing a target function based on a preset weight coefficient, the ship oil consumption and the ship energy efficiency operation index; the method comprises the following steps: setting navigation intervals and weather intervals based on a time dimension, further calculating a weather array corresponding to each navigation interval by adopting a specific calculation method, and then setting an initial actual navigation speed of a certain navigation interval in an actual navigation speed value interval; and taking the initial actual navigational speed and the weather array corresponding to the navigation interval as the initial solution of the simulated annealing algorithm, and finally calculating the optimal navigational speed of each navigation interval by adopting the simulated annealing algorithm, thereby realizing the optimization of the ship navigation performance and effectively improving the ship navigation performance.

The invention relates to the technical field of freight processing systems, and discloses a digital freight processing settlement system and a settlement method thereof. And the management module is in bidirectional communication connection with the user interface module, the order management module, the abnormity management module, the cost simulation module, the freight settlement module and the data analysis module, and is used for managing data information generated in the operation process of the system and carrying out corresponding system parameter setting and interface management according to each account permission. The freight calculation unit performs freight calculation according to a clear calculation formula and a rate table, supports the calculation of special fees such as overtime waiting fees, highway fees and bridge passing fees, and provides a detailed list of fees, so that a cargo owner and a driver can clearly know the source and calculation basis of each fee, thereby avoiding fee disputes and improving the efficiency of the system. And the smoothness in the freight processing process is improved.

The invention discloses a translation point configuration initial value design method based on sequential optimization, and belongs to the technical field of aerospace. The implementation method comprises the steps of designing an orbit of a translation point detector, namely, based on a circular restrictive three-body model, obtaining a periodic or quasi-periodic orbit near a translation point through differential correction, and then obtaining an orbit near the translation point under a high-precision ephemeris by using a multiple targeting method. And designing the orbit of the earth phase offset detector, obtaining an optimized initial value according to the characteristics of the instantaneous earth phase offset orbit, and performing optimization by taking the minimum phase angle variation as an index and utilizing a differential evolution algorithm. And taking a configuration stability index as an optimization objective, introducing a relaxation factor and a relative arrival factor, establishing a multi-objective optimization problem, and converting the multi-objective optimization problem into a multi-objective arrival problem. And an expected reaching target is given, high-precision numerical optimization is carried out, a configuration initial value with relatively high stability is obtained, and related technical problems in the translation point configuration application field are solved.

The invention provides a short-fiber carbon-ceramic composite material brake disc and a preparation method thereof, and belongs to the field of brake discs. The short-fiber carbon-ceramic composite material brake disc is prepared from the following raw materials in percentage by weight: 45-70% of modified short carbon fibers, 1-5% of boron carbide, 3-10% of an adhesive, 2-8% of kaolin, 2-5% of boron nitride, 2-5% of aluminum nitride, 2-6% of carbon black, 2-6% of graphite, 1-5% of a modified dispersant, 1-3% of sodium carboxymethyl cellulose, 1-3% of ethanolamine, 1-4% of sucrose fatty acid ester, 2-6% of nitrile rubber powder and 8-20% of an organic solvent. According to the short-fiber carbon-ceramic composite material brake disc and the preparation method thereof, the high temperature resistance and thermal shock resistance of the carbon-ceramic brake disc can be further improved while the manufacturing period is shortened, the production efficiency is improved and the production cost is reduced, the wear-resistant consistency of the carbon-ceramic brake disc is improved, and the effective service life of the carbon-ceramic brake disc is effectively prolonged.

The invention provides a driving method and a vehicle. The driving method comprises the steps that the current remaining electric quantity of a battery and the current load working condition of a walking system are obtained; adjusting the power generation power of the engine according to the current residual electric quantity, enabling the engine to generate power for the battery through the generator, and maintaining the electric quantity balance of the battery; driving modes are determined according to the current load working condition, the driving modes at least comprise a pure electric mode, a hybrid mode and a fuel oil mode, in the pure electric mode, the generator stops running, the battery is controlled to supply power to the walking motor, in the hybrid mode, the engine and the battery supply power to the walking motor together, and in the fuel oil mode, the engine supplies power to the walking motor. And the electric energy output of the battery is closed. The power generation power of the engine can be adjusted according to the current residual electric quantity, different driving modes are adopted according to different working conditions, the problem that a single driving mode cannot adapt to various working condition requirements can be avoided, meanwhile, the cost of the hybrid power driving system can be reduced, and the use stability and the service life of the hybrid power driving system are ensured.

The invention discloses a crawler-type hybrid power intelligent orchard operation robot and a method thereof. The operation robot comprises a walking system, a power system, an operation system and a control system, a crawler wheel train is sequentially connected with a driving motor and a driving motor controller, an energy storage unit and an engine jointly or independently output power to the walking system according to an energy strategy, and a whole vehicle controller is responsible for coordinated control over the whole vehicle energy flow direction. And the intelligent navigation controller is responsible for receiving a navigation signal, planning a track and calculating and outputting a motion control quantity, and automatically spraying liquid medicine to the orchard through the operation system in the automatic driving process of the operation robot. The crawler-type hybrid power intelligent orchard operation robot fills the blank that no crawler-type hybrid power intelligent orchard operation robot exists in the current market, the single-time operation endurance time of the operation robot is prolonged, people and pesticide are separated in the orchard pesticide spraying process, the intelligent function is easier to achieve, and the crawler-type hybrid power intelligent orchard operation robot conforms to the development strategy of high-end agricultural machinery and intelligent manufacturing.

The invention provides an engine braking device with returning and limiting functions and an engine, and belongs to the technical field of automobile parts. The brake rocker arm and the rocker arm shaft are matched through a shaft hole, the side portion of the brake rocker arm extends in the horizontal direction to form an abutting platform, a limiting concave part is arranged on the outer surface of the rocker arm shaft, and a limiting convex part is arranged on the brake rocker arm; the rocker arm support is provided with a first connecting part; one end of the return spring support is connected with the first connecting part, the horizontal height of the first connecting part and the horizontal height of the second connecting part are both higher than the horizontal height of the abutting platform, and the horizontal height of the return spring support is lower than the horizontal height of the upper surface of the brake rocker arm; the two ends of the first elastic piece are clamped between the other end of the return spring support and the abutting platform. According to the engine braking device, the size of the whole engine braking device in the vertical direction is reduced, and the structure is more compact.