85 results about "Engine efficiency" patented technology

The application discloses a kind of inlet passage liquid ammonia injection and exhaust gas circulation heat recovery system and method, it is related to the technical field of multi-fuel engine system, inlet passage liquid ammonia injection and exhaust gas circulation heat recovery system, comprising: liquid ammonia storage tank, liquid ammonia pressure stabilizing supply system, liquid ammonia nozzle, mixed heat exchanger, exhaust gas recirculation system and controller, controller calculates the real-time required liquid ammonia injection amount according to engine real-time working condition information and controls liquid ammonia nozzle work in real time, controller calculates the real-time required heat according to the real-time required liquid ammonia injection amount that liquid ammonia gasification and temperature rise to set temperature, according to the real-time required heat that liquid ammonia gasification and temperature rise to set temperature, calculate the real-time required exhaust gas, controller controls exhaust gas recirculation system according to real-time required exhaust gas amount and makes required amount of exhaust gas backflow into mixed heat exchanger.The application can improve engine system stability, improve engine efficiency, reduce pollutant emission.

The utility model relates to the technical field of vehicle engineering, and provides an exhaust pipeline, an engine and a vehicle, and the exhaust pipeline comprises a front cylinder group and a rear cylinder group. Wherein connectors, used for being connected with an engine, of a first manifold A, a second manifold A and a third manifold A of the front cylinder set are arranged at equal intervals, a gathering pipe A comprises a first section A and a second section A, the first section A is connected with the other end of the first manifold A and the other end of the second manifold A, and the second section A is connected with the other end of the second manifold A and the other end of the third manifold A; the guide lines of the first manifold A, the second manifold A and the third manifold A are arc curves, the guide line of the first section A is tangent to the guide lines of the first manifold A and the second manifold A, the guide line of the second section A is tangent to the guide lines of the second manifold A and the third manifold A, and the first section A and the second section A are connected through an arc chamfer; the rear cylinder set and the front cylinder set are arranged in an image mode with the center plane of the supercharger as the plane. Exhaust energy loss can be reduced, so that the engine is efficient and energy-saving.

The present application relates to a kind of satellite assembly large centroid deviation engine layout and thrust synthesis method.The present application method includes the steps of installing engine based on top edge top angle layout principle and carrying out the reconstruction of orbit control thrust distribution matrix.The present method realizes the maximum of the distance span between each engine by using the engine installation layout of top edge top angle installation,enhances the tolerance ability of orbit control engine group to the centroid deviation of assembly;The present method uses the oblique installation design with 25 ° angle with Z axis,so that the tolerance ability of orbit control engine group to the centroid deviation of assembly can be automatically proportional to the change of assembly centroid in Z direction and enhanced;The present method realizes +Z direction thrust synthesis by orbit control thrust distribution matrix reconstruction,without additional coupling interference moment generation,reduce the efficiency loss of orbit control engine,realize the reconstruction and synthesis of the orbit control thrust of large centroid deviation assembly.

The application discloses a compression ignition type methanol engine and a control system thereof, and relates to the technical field of engine control, which comprises a methanol engine and a methanol tank, further comprises a methanol water boiler, and is provided with an electric heating plug at a cylinder of the methanol engine; the methanol tank is connected with the methanol water boiler, a first methanol pump and a second methanol pump through connecting pipelines respectively; control valves one, two and three are arranged on the connecting pipelines respectively; the control system of the compression ignition type methanol engine comprises a cold start and warm-up working condition identification module, an acceleration working condition identification module, a load working condition identification module and an engine control module; the high-efficiency and reasonable heat management system and the air intake passage / in-cylinder double-methanol injection supply technology are adopted, the methanol engine can be operated efficiently in all working conditions, the efficiency and the power of the methanol engine can be improved simultaneously, and the effect of the high-efficiency and high-power compression ignition type methanol engine is realized.

The application provides a control method and device of a vehicle range extender system, a storage medium and an electronic device. The method comprises: obtaining a motor speed regulation capability of a generator corresponding to a current working condition, the motor speed regulation capability representing a time for regulating a current generator speed to a target speed; determining a maximum range extender power generation power as an optimization target and the motor speed regulation capability as a constraint condition, the maximum range extender power generation power being a maximum value of power generation power of the vehicle range extender system; determining corresponding target engine efficiency and target generator efficiency according to the maximum range extender power generation power, and controlling the engine to work according to the target engine efficiency and the generator to work according to the target generator efficiency, so that fuel consumption of the vehicle is less than a preset fuel consumption. The method improves the economy of the range extension system based on the engine target torque at different speeds when the PTO is powered off-line, and improves the economy of the range extension system within the allowable range of the motor speed regulation capability.

The embodiment of the invention discloses a hybrid power system efficiency optimization control method and system and a computer storage medium, and the method comprises the steps: calculating the required power of an engine based on the preset theoretical power of a battery and the current required power of an output shaft of a vehicle; engine rotating speeds in a preset range are selected in sequence, and engine torques corresponding to the engine rotating speeds are determined in sequence; engine efficiency is obtained according to the effective fuel consumption rate corresponding to the engine torque, and the rotating speed and torque of the first motor and the second motor are determined according to the engine efficiency; obtaining the first efficiency of the first motor and the second efficiency of the second motor, and calculating the actual power of the battery according to the first efficiency and the second efficiency; calculating system efficiency based on the output shaft demand power, the engine demand power, the battery theoretical power, the engine efficiency and the battery actual power; and comparing the system efficiency corresponding to the rotating speed of each engine, and determining the optimal value of the system efficiency.

Disclosed is a greenhouse gas reduction device combining EGR and iCER for a ship, including: an exhaust gas receiver 110 temporarily storing exhaust gas discharged from each cylinder of a ship engine 10 and removing pulsation; a supercharger 120 compressing and supplying combustion air by means of exhaust gas supplied from the exhaust gas receiver 110; a washing section 130 spraying washing water to exhaust gas supplied through the supercharger 120, washing and removing SO X and soot, and circulating coolant to cool exhaust gas; a CO2 absorbing section 140 spraying absorbing liquid to exhaust gas passing through the washing section 130 to absorb and remove CO2; a combustion air receiver 150 temporarily storing combustion air compressed by the supercharger 120, removing pulsation, and supplying air to each cylinder of the ship engine 10; and an exhaust gas circulation section 160 supplying exhaust gas passing through the CO2 absorbing section 140 to the supercharger 120 so as to be mixed with outside air; by combining EGR with iCER, it is possible to reduce NO X generation by means of EGR, while absorbing CO2 and SO X x and converting them into substances that do not affect the environment, prevent corrosion of the engine, improve combustion quality, improve engine efficiency by means of iCER, and reduce methane escape.

The application relates to the technical field of cylinder lubrication, and provides a piston cylinder lubricating device, which comprises a bottom shell, a top shell arranged at the top of the bottom shell, a cylinder communicated with the top of the top shell, a power output rod rotationally connected to the inner sides of the bottom shell and the top shell, a rod sleeve rotationally connected to the outer side of the power output rod, a main connecting rod fixedly connected to the top of the rod sleeve, an axle block rotationally connected to the end, away from the rod sleeve, of the main connecting rod, a piston fixedly connected to the top of the axle block, and the outer side of the piston movably embedded in the inner surface of the cylinder; a linkage assembly is arranged on the outer side of the power output rod; a lubricating assembly is arranged at the bottom of the bottom shell, can reduce the spraying amount of lubricating oil at low speed, avoids that redundant lubricating oil is combusted to generate carbon deposit, improves engine efficiency, avoids knocking, and exhausts lubricating oil which is not completely combusted, so that tail gas pollutants are reduced.

The application provides a high-temperature heat exchanger for a Stirling engine and the Stirling engine, the high-temperature heat exchanger comprises a cylindrical shell, a circular ring fin group and a plurality of heat pipes, the circular ring fin group is arranged on the inner side of the cylindrical shell and the axes coincide, the plurality of heat pipes are embedded and penetrate through the cylindrical shell and the circular ring fin group along the direction perpendicular to the axis of the cylindrical shell, and the plurality of heat pipes are arranged in parallel with each other. The application realizes increasing the number of the arranged heat pipes, and further increases the contact area of the heat pipes and the circular ring fin group, reduces the circumferential temperature difference in the circular ring fin, enhances the overall heat exchange performance of the high-temperature heat exchanger, and improves the engine efficiency.

The invention relates to the technical field of air cylinder lubrication, and provides a piston type air cylinder lubricating device which comprises a bottom shell, a top shell is arranged at the top of the bottom shell, the top of the top shell communicates with an air cylinder, a power output rod is rotationally connected to the inner side of the bottom shell and the inner side of the top shell, and a rod sleeve is rotationally connected to the outer side of the power output rod. A main connecting rod is fixedly connected to the top of the rod sleeve, a shaft block is rotationally connected to the end, away from the rod sleeve, of the main connecting rod, a piston is fixedly connected to the top of the shaft block, and the outer side of the piston is movably embedded in the inner surface of the air cylinder; a linkage assembly is arranged on the outer side of the power output rod. A lubricating assembly is arranged at the bottom of the bottom shell, the spraying amount of lubricating oil can be reduced at a low speed, redundant lubricating oil is prevented from being combusted to generate carbon deposit, the efficiency of the engine is improved, knocking is prevented from being caused, the lubricating oil which is not completely combusted is prevented from being discharged along with waste gas, and tail gas pollutants are reduced.

The six cylinder bodies are arranged around the combustion chamber, detonation waves generated in the explosion process of the combustion chamber are fully absorbed from six directions by using the detonation waves as much as possible in all directions, and then the absorbed detonation waves are converted into kinetic energy through the crank connecting shaft device, so that the efficiency of the engine is improved. According to the first type, when the diesel engine is used, the diesel engine does not need to be ignited by a sparking plug, so that the cylinder bodies are six square cylinder bodies; in the second case, when gasoline is used as fuel, a spark plug is needed for ignition, so that one of the cylinder bodies in the six directions is made into a round shape to be used for installing the spark plug. Rails are arranged at four corners of a square cylinder body, and a sealing valve, a piston ring and a ball are arranged on a piston. The top end of the piston is spherical and protrudes as much as possible, and the size of a combustion chamber is reduced.

The application provides a torque distribution method, device and equipment applied to a hybrid vehicle, the method comprising: determining a plurality of output torques of a current engine speed at a preset engine efficiency from an engine speed, a value range of an output torque of the engine and a mapping relationship of engine efficiency; obtaining energy values of at least one candidate output torque meeting a preset condition in the plurality of output torques respectively by using a relationship model according to a current state of charge of a battery, a cooperative state variable and the at least one candidate output torque; selecting a target energy value smaller than a first preset threshold from the energy values of the plurality of output torques respectively, and determining an actual output torque of the current engine based on an output torque corresponding to the selected target energy value. Through the above method, an accurate distribution result can be obtained when the PMP algorithm is used to distribute the output torque of the engine.

This invention provides a control method, device, and vehicle for a work vehicle, belonging to the field of mechanical control technology. The method includes: adjusting the vehicle's speed based on engine load rate; and, under predetermined conditions, adjusting the target engine speed based on the speed difference between the actual engine speed and the target engine speed. The control method, device, and vehicle provided by this invention, by monitoring the engine load rate in real time and performing segmented speed control, can effectively prevent unexpected events such as engine speed drop or stalling due to overload. It can rationally utilize engine efficiency, significantly improve work efficiency, reduce reliance on driver skills, and prevent damage to work equipment and transmission systems due to excessive changes in work load.

The utility model discloses a device for surface infiltration of a wear-resistant insert ring for an aluminum piston, which comprises an induction coil for heating molten aluminum, an overflow pipe for balancing the pressure in a first infiltration crucible, and protective gas for pressing the molten aluminum into a second infiltration crucible, the infrared distance detection sensor and the flow controller are used for feeding back and controlling the input speed and flow of shielding gas, and the adjustable bolt support is used for guaranteeing the stability of the device. The aluminum alloy piston solves the problems that in the casting process of a traditional aluminum alloy piston, due to the facts that the surface layer of the insert ring is prone to being oxidized, aluminizing is not thorough and the like, an iron-aluminum bonding layer is very fragile, stress exists, extension is not achieved and the like, the insert ring is loosened or cracked in the using process of the piston, and the service life of the piston is prolonged. The efficiency of the engine is influenced, and even more serious consequences are caused.

The utility model discloses a methanol engine air inlet system and a methanol engine, and relates to the technical field of engine equipment, the methanol engine air inlet system comprises a throttle valve used for sucking air and controlling the air-fuel ratio; the air inlet connector is connected with the throttle valve, the air inlet connector extends towards two sides of the throttle valve to form air inlet branch pipes, the end part of each air inlet branch pipe is connected with an air inlet heater, each air inlet heater is communicated with the air inlet manifold, and each air inlet heater is positioned at two ends of the air inlet manifold; the fuel injector is arranged on the outer wall of the intake manifold, the fuel injector is communicated with an inner cavity of the intake manifold and injects fuel into the cavity of the intake manifold, and by means of the methanol engine air intake system, the problem that the fuel is not prone to falling off under the condition that the working environment temperature of a methanol engine is low due to the fact that latent heat of vaporization of methanol is high is solved. The atomization degree of methanol fuel gas sprayed by a fuel nozzle is poor, and the efficiency of a methanol engine is reduced.

This invention discloses an anti-knock control method, control device, and vehicle applied to an engine in a hybrid power system. The control method includes: adjusting the engine's initial demand torque change rate limit, initial torque limit, and initial speed limit to a first demand torque change rate limit, a first torque limit, and a first speed limit, respectively; acquiring the engine's knock intensity signal and knock thrust angle under normal operating conditions; determining the engine's knock risk based on the knock intensity signal and knock thrust angle; and correcting the first demand torque change rate limit, the first torque limit, and the first speed limit based on the knock risk. The anti-knock control method provided by this invention can adjust the engine's parameter usage limits in real time, using the engine to operate to the maximum extent possible and to prevent the risk of engine knock, thereby improving engine efficiency and economy.

A calibration method for torque distribution in a rear-wheel-drive DHT parallel mode is disclosed, belonging to the field of automotive automatic transmission control. The method is as follows: data preparation; determining and discretizing the powertrain operating data table; selecting the optimal torque distribution scheme; generating a calibration data table; writing the calibration results into the control strategy; using simulation software, inputting specified vehicle data, and equipping the vehicle with the corresponding engine and rear-wheel-drive DHT, evaluating the torque distribution portion of the control strategy in the DHT parallel mode through simulation analysis. If the simulation results show that the power and economy meet the design goals, the calibration data for the torque distribution in the DHT parallel mode of the control strategy is qualified; otherwise, it is unqualified. This invention effectively avoids the situation where simply considering engine efficiency leads to low efficiency of the motor, battery, and transmission system, resulting in low efficiency of the entire DHT powertrain system, thus effectively improving the power and economy of vehicles equipped with DHT.

The invention relates to the technical field of exhaust emission detection devices, and discloses a hybrid vehicle engine exhaust emission detection device and method, and the device comprises a test box, the inner wall of the left side of the test box is rotatably connected with a glass observation door, and the top of the test box is provided with an air pump. The inner wall of the test box is slidably connected with a moving column through a spring, the top of the moving column is fixedly connected with a test board, the bottom of the test board is fixedly connected with a limiting rod, and the inner wall of the test board is slidably connected with a sliding plate. And the test bench drives the buffer plate to fix the motor, so that maintenance personnel can quickly position problems, the maintenance cost is reduced, the engine efficiency is improved, rich data is provided for subsequent technical improvement, the detection data of equipment is further improved, a request can be quickly returned, and the overall response speed is improved.

The application discloses an aero-engine blade maintenance evaluation method and a blade. The aero-engine blade maintenance evaluation method comprises the following steps: a plurality of wear marks are respectively arranged on each blade in an initial state, and each wear mark corresponds to a different blade tip wear amount; after use, the blades are checked, the blade tip wear interval corresponding to each blade is determined according to the blade tip after wear and the wear mark; the number of blades located in different blade tip wear intervals is counted respectively; and a maintenance plan is determined according to the counting condition of different blade tip wear intervals. The application is not only efficient, convenient, low in cost, wide in application range and high in reliability, but also has no influence on the blade structure and engine efficiency.

The application discloses a two-stroke free piston engine, which comprises two opposite cylinders, a swing gear, a first one-way clutch, a second one-way clutch, a first power output and a second power output, and a piston connected through a push rod, wherein the swing gear is engaged with a rack on the push rod, the swing gear is connected with the first power output through the first one-way clutch and connected with the second power output through the second one-way clutch, and the piston makes a linear reciprocating motion once to form a first stroke and a second stroke in sequence, and in each stroke, one cylinder works and the other cylinder compresses to ensure the output power of each stroke, and the power of the two power outputs is coupled and then outputted as continuous power through a transmission unit. Thus, the complex transmission mechanism formed by the push rod, the crankshaft and the like in the prior art can be cancelled, the linear reciprocating motion of the piston is converted into rotary motion, the power in the rotary form is outputted, and the engine efficiency is improved.

This invention discloses an oil reservoir assembly, a power system, and a vehicle, relating to the field of vehicle technology. It aims to solve the problem of preventing oil-air mixtures from entering the engine and affecting engine efficiency. The oil reservoir assembly is applied to a vehicle and includes a first oil reservoir adapted to store lubricating oil and connected to the vehicle's engine. Along the length of the vehicle, the first oil reservoir is preferably positioned between the engine and the front end of the vehicle, with a distance of not less than 500mm between the first oil reservoir and the engine's exhaust pipe. Thus, in the event of a collision, because the distance between the first oil reservoir and the engine's exhaust pipe is greater than or equal to 500mm, the oil from the first oil reservoir is prevented from splashing onto the engine, thereby preventing accidental fire.

Methods and systems for operating a vehicle powertrain that includes a power take-off are presented. In one non-limiting example, engine speed may be adjusted to increase engine efficiency during conditions when the engine is operating at idle conditions for longer than a threshold amount of time so that fuel consumption and wear may be reduced.

An engine is provided with various enhanced features. For example, a 2-stroke diesel engine has a porting design that enhances the efficiency of a scavenging event. In specific embodiments, a four-piece piston is positioned in each cylinder of the engine. The four-piece piston includes a bowl, a ring retainer, a skirt, and a wrist-pin bearing. In various embodiments, fuel pumps are coupled to fuel channels or high-pressure lines to provide a constant and equal high-pressure fuel supply to engine cylinders. In more specific embodiments, the length of each of the high-pressure lines is the same. In certain specific embodiments, complimentary screws form a supercharger that further improves engine efficiency by providing high-pressure intake air to the porting process.

The utility model discloses a wind-sand-proof cover for an aircraft engine, which belongs to the technical field of wind-sand-proof covers and is characterized by comprising an aircraft engine body, the outer wall of the aircraft engine body is sleeved with a stabilizing structure, and the inner wall of the stabilizing structure is bolted with a protective structure. The outer side of the protection structure is fixedly connected with an auxiliary structure, the inner wall of the mounting frame is fixedly connected with the outer wall of a mesh cloth block, the inner wall of the mounting piece is fixedly connected with the outer wall of a film block, and the inner wall of the connecting piece is fixedly connected with the outer wall of a filter block. Especially in frequent sand storm or desert and dry areas, an engine air inlet system of an airplane easily sucks sand and dust and particulate matters in air, the sand and dust particles contain fine sand and soil particles, and the particulate matters not only damage precise parts in an engine, but also possibly cause reduction of the efficiency of the engine.

This invention relates to a crankless piston internal combustion engine and its operating method, which can be widely applied to various motor vehicles and stationary engines. Engines according to this invention will provide higher economic efficiency and longer service life during operation. The engine efficiency according to this invention is achieved by applying a basic kinematic scheme that converts the linear reciprocating motion of the piston into the rotational motion of the engine drive shaft (9). The piston (21) performing the working cycle stroke completes its full working stroke by rotating the drive shaft (9) by 90°, instead of 180° as in conventional engines. Each stroke begins with drive gear sets (10, 11, 12, 13) (each set corresponding to one piston (21)) arranged at an angle of approximately 45° relative to the direction of piston (21) motion, and the sets are offset from each other by approximately 90°. The offset angles between the drive gear sets, starting with the drive teeth of the "expansion" stroke, are arranged at different angle values, allowing two, three, or more "expansion" strokes to be performed simultaneously. Each piston stroke does not begin with a zero torque value, but rather with a value equal to the maximum torque value of the crank-driven engine. According to the present invention, the engine torque and power values ​​are approximately three times, six times, and nine times that of an engine with a crank mechanism, respectively, at the same speed.

A gas turbine engine comprises a fan assembly, a core engine coupled to the fan assembly, a fan case housing the fan assembly and the core engine, a plurality of outlet guide vanes extending between the core engine and the fan case, and an acoustic spacing. The fan assembly comprises a plurality of fan blades that define a fan diameter and a blade effective acoustic length (BEAL). The acoustic spacing comprises a distance between the fan assembly and the plurality of outlet guide vanes, and in combination with the BEAL determines an acoustic spacing ratio of the gas turbine engine. A gearbox assembly with an improved engine efficiency rating used in combination with the acoustic spacing provides an improved and balanced engine architecture.

A free-piston engine, comprising at least one cylinder bank, which comprises two cylinders arranged opposite each other, and further comprising a transmission unit, wherein the transmission unit comprises two oscillating gears, and one-way clutches and transmission shafts that respectively match the oscillating gears; the oscillating gears are set in fixed-axis rotation; pistons of the two cylinders in the cylinder bank are connected by means of a push rod (3); the push rod (3) is provided with a rack (31); the oscillating gears mesh with the racks (31); and by means of the one-way clutches, the oscillating gears are in transmission connection with the transmission shafts corresponding thereto. The free-piston engine can eliminate a complex transmission mechanism composed of connecting rods, crankshafts, etc., and converts a linear reciprocating motion of the pistons into a rotational motion for output, thereby improving engine efficiency.

A solid composition comprising copper (Cu), zinc (Zn), molybdenum (Mo), tungsten (W), vanadium (V), tin (Sn) and silver (Ag), which improves performance of combustion engines by decreasing fuel consumption and levels of emission, particularly soot (particulate matter, or PM), carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx), in an economically efficient way.

Provided is an operation method of a heat engine device using a single ion configured to greatly improve the efficiency of a heat engine by performing work in a different way than heat engine apparatuses to which classical thermodynamics applies. With the single ion heat engine device, a heat engine cycle in accordance with an auto engine cycle can be established on a micro-scale. Accordingly, the heat engine device using single ion has the effect of being able to be utilized as a substantially mesoscopic or nano-scale heat engine. This utilization is based on concepts, such as temperature, entropy, and pressure, that vary with features of a micro-miniaturized heat engine and types of thermal reservoirs and on interpretation of a change in engine efficiency.

To provide a marine engine with improved efficiency compared to conventional engines.SOLUTION: A marine engine uses a fuel gas as fuel, and comprises a plurality of cylinders, a gas valve for supplying the fuel gas to the cylinders, an air intake port for supplying air into the cylinders, and an exhaust port for discharging the air in the cylinders. The cylinder has a piston, a rod, and a main combustion chamber above the piston. The marine engine further comprises a plurality of auxiliary chamber units that are connected to the main combustion chambers of the cylinders and equipped with an ignition device.SELECTED DRAWING: Figure 3