184 results about "Engine efficiency" patented technology

The present invention provides a method for controlling the motor output of an electric motorcycle with a stepped transmission which can be manually operated by an occupant, wherein the method comprises changing the output when the output deviates from a range with satisfactory motor efficiency, and prompting the occupant to perform a shifting operation. A method for controlling a motor output according to the present disclosure is a method for controlling a motor output of an electric motorcycle (1) which includes a stepped transmission (20), wherein the method comprises: an output request calculation step (SA1) for calculating a requested output; a determination step (SA2) for determining whether the requested output is contained within a designated range (82) with satisfactory motor efficiency; and an output control step (SA3) for controlling a motor (10) to output a motor output different from the requested output if the requested output is not contained within the designated range (82).

The invention discloses an efficient continuous variable geometric compression ratio device suitable for engines of various structure types, and relates to the technical field of engines. Comprising a machine body, a piston, a connecting rod, a crankshaft and an eccentric shaft sleeve, a large-head hole of the connecting rod is rotatably connected with an outer circle of the eccentric shaft sleeve, a crankshaft journal of the crankshaft is rotatably connected with an inner hole of the eccentric shaft sleeve, and at least one end of the eccentric shaft sleeve is fixedly connected with a driven gear. The driven gear is in transmission connection with a driving gear, and a regulation and control unit is arranged between the driving gear and the crankshaft. When the compression ratio of the engine needs to be adjusted, the control unit controls the driving gear to rotate to a target phase relative to the crankshaft; when the compression ratio of the engine does not need to be adjusted, the adjusting and controlling unit controls the driving gear and the crankshaft to rotate synchronously. The problems that an existing VCR device is narrow in application range and the like are solved, the mechanical loss in the operation process of an engine is greatly reduced, and the efficiency of the engine is greatly improved.

The utility model relates to the technical field of engines, and particularly discloses an intake manifold assembly which is arranged between an air damper and air inlet channels on an air cylinder cover in a communicated mode and comprises an upper shell and a lower shell which are in butt joint with each other, a main cavity is formed between the upper shell and the lower shell, and a flange connector is arranged at one end of the lower shell. One end of the flange joint communicates with the main chamber, and the other end of the flange joint communicates with the throttle valve; a plurality of manifold cavities are formed in the end, away from the flange connector, of the lower shell, communicate with the main cavity and communicate with the multiple air inlet channels correspondingly. An oil rail is arranged on the upper shell, a plurality of mounting pipes are arranged on the lower shell, one mounting pipe is communicated with one manifold cavity, oil sprayers are arranged in the mounting pipes, and the oil sprayers are communicated with the oil rail; one end of the oil sprayer far away from the oil rail extends out of the manifold cavity; the problems that under the same displacement, a naturally aspirated engine is usually low in power, low in overall engine efficiency and the like are solved.

A computer system includes a processor controls the computer system to perform a computer-implemented method of determining a minimum humidity required for formation and persistence of contrails produced by an engine of an aircraft. The computer-implemented method includes determining engine performance model parameters of the engine at desired operating conditions with zero humidity; determining additional energy flow out of the engine; and determining an exhaust plume temperature scaling factor. The method further comprises determining a contrail engine efficiency parameter (noverall_λ) based on additional energy flow out of the engine and the exhaust plume temperature scaling factor; and generating an improved Schmidt-Appleman equation based on the contrail engine efficiency parameter (noverall_λ). The method further includes determining an improved mixing line slope based on the improved Schmidt-Appleman equation; and determining the minimum humidity required for formation and persistence of contrails produced by the engine based on the improved mixing line slope.

The invention discloses a crankshaft assembly of an engine, the engine and a vehicle, and relates to the technical field of engines, the crankshaft assembly comprises a crankshaft, a first rolling bearing, a second rolling bearing and a sliding bearing, the crankshaft comprises a plurality of crankshaft body sections and a connecting rod journal section, and the crankshaft body sections are sequentially arranged at intervals in the length direction of the crankshaft; a connecting rod journal section is connected between any two adjacent crankshaft body sections, at least one crankshaft body section is sleeved with a first rolling bearing, the first rolling bearing is used for being connected with an engine body of an engine, the connecting rod journal section is sleeved with a second rolling bearing, and the second rolling bearing is used for being connected with a crankshaft connecting rod of the engine. At least one crankshaft body section is sleeved with a sliding bearing, and the sliding bearing is used for being connected with an engine body. According to the crankshaft assembly, the energy loss can be reduced, the mechanical loss of an engine is effectively reduced, and the efficiency of the engine is improved.

The invention discloses a gas inlet channel liquid ammonia injection and waste gas circulation heat recovery system and method, and relates to the technical field of multi-fuel engine systems.The gas inlet channel liquid ammonia injection and waste gas circulation heat recovery system comprises a liquid ammonia storage tank, a liquid ammonia pressure stabilizing supply system, a liquid ammonia nozzle, a mixing heat exchanger, a waste gas recirculation system and a controller; the controller is used for calculating the liquid ammonia injection amount required in real time according to the real-time working condition information of the engine, controlling the liquid ammonia nozzle to work in real time, and calculating the real-time required heat for gasifying the liquid ammonia and heating the liquid ammonia to the set temperature according to the liquid ammonia injection amount required in real time; the real-time needed waste gas amount is calculated according to the real-time needed heat of liquid ammonia gasification and temperature rising to the set temperature, and the controller controls the waste gas recirculation system in real time according to the real-time needed waste gas amount to enable the needed waste gas to flow back to the mixing heat exchanger. The system stability of the engine can be improved, the efficiency of the engine is improved, and pollutant emission is 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.

A turbomachine engine can include a fan assembly, a vane assembly, a core engine, a gearbox, and an overall engine efficiency rating. The fan assembly can include a plurality of fan blades. The vane assembly can include a plurality of vanes, and the vanes can, in some instances, be disposed aft of the fan blades. The core engine can include a low-pressure turbine. The gearbox includes an input and an output. The input of the gearbox is coupled to the low-pressure turbine of the core engine and comprises a first rotational speed, the output of the gearbox is coupled to the fan assembly and has a second rotational speed, and a gear ratio of the first rotational speed to the second rotational speed is within a range of 2.0-4.0.

The invention discloses a crankshaft assembly of an engine, the engine and a vehicle, and relates to the technical field of engines, the crankshaft assembly comprises a crankshaft and a rolling bearing, the crankshaft comprises a plurality of crankshaft body sections and a connecting rod journal section, and the crankshaft body sections are sequentially arranged at intervals in the length direction of the crankshaft; a connecting rod journal section is connected between any two adjacent crankshaft body sections, an oil flow channel is formed in the crankshaft and used for being arranged corresponding to an oil supply port in an engine body, each connecting rod journal section is sleeved with a rolling bearing, the rolling bearings are used for being connected with a crankshaft connecting rod of an engine, oil inlet holes are formed in the rolling bearings, and the oil inlet holes are communicated with the oil inlet holes. And the oil inlet hole is communicated with the oil flow channel. According to the crankshaft assembly, the energy loss can be reduced, the mechanical loss of an engine can be reduced, the efficiency of the engine can be improved, the effect of lubricating the multiple rolling bearings at the same time can be achieved by arranging the oil flow channel in the crankshaft, and the lubricating effect of the crankshaft assembly can be improved.

A gas turbine engine has a compression system blade ratio defined as the ratio of the height of a fan blade to the height of the most downstream compressor blade in the range of from 45 to 95. This results in an optimum balance between installation benefits, operability, maintenance requirements and engine efficiency when the gas turbine engine is installed on an aircraft.

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 present invention discloses an air control device with a cam structure, which relates to the field of air control systems for aeroengines. The air control device with a cam structure includes a valve body, a track housing is arranged above the valve body, a cam is arranged on the inner wall of the track housing, and an actuator cylinder body is connected to the end of the cam. The air control device with a cam structure drives the cam mechanism through the movement of the piston rod of the actuator cylinder to realize full opening and full closing of the valve. The full opening and full closing of the valve realize the passage and cutoff of cooling air. Under the action of a high-temperature sealing component and a metal sealing ring, the high-temperature sealing performance of the air valve is improved, and the engine efficiency is increased. Under the action of the load force of the actuator cylinder, a cam mechanism is used for force transmission to avoid valve jamming caused by the influence of lateral force.

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.

According to the electromagnetic traction type engine, an engine bottom shell, a crankcase and four cylinder bodies are made of aluminum alloy materials, and a crankshaft and four connecting rod-piston assemblies are arranged in the engine. The upper end of each group of pistons is connected with an armature block of an electromagnetic assembly, electromagnets are installed corresponding to openings of the cylinder bodies, and accurate driving of the pistons is achieved by controlling on-off and magnitude of currents. The connecting rods are arranged in a specific mode, crankshaft stress is balanced, and operation stability is improved. A pulse type traction electromagnet is adopted, high magnetic force is generated through short-time high-current pulses, and rapid action of a piston is achieved. The engine is compact in structure and rapid in response, the piston is directly driven through electromagnetic force, zero emission is achieved, control is easy, the efficiency and the environmental protection performance of the engine are improved, the engine is suitable for various power requirement scenes, and remarkable innovativeness and practicability are achieved.

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 utility model discloses a trapezoidal contact piston structure, relates to the technical field of pistons, and solves the technical problem that the improvement of the efficiency of an engine is influenced due to larger friction loss caused by larger shape area of a skirt part of an existing piston. Comprising a piston head and a piston skirt part, the piston skirt part is composed of a skirt top, a skirt bottom and a skirt edge, the skirt top is connected with the center of the lower surface of the piston head, the section of the skirt top is larger than that of the skirt bottom, the skirt edge is located between the skirt top and the skirt bottom, the skirt top, the skirt bottom and the skirt edge are integrally formed, and the skirt edge is of a conical cylindrical surface structure and has a trapezoidal section. The two sides of the section of the skirt edge are symmetrically arranged, and the two sides of the section of the skirt edge incline inwards. According to the utility model, the traditional piston skirt is improved from a cylindrical surface arc-shaped structure to an inwards inclined conical cylindrical surface structure, so that the shape area of the piston skirt part is effectively reduced, the overall weight of the piston can be reduced, the friction loss of an engine is reduced, and the efficiency of the engine is favorably improved.

The invention discloses an intelligent dynamic cylinder deactivation algorithm for a multi-cylinder diesel engine, relates to the technical field of internal combustion engines, and solves the technical problem of unstable power output caused by lack of flexibility of an existing diesel engine cylinder deactivation strategy. The algorithm comprises the steps that the cylinder deactivation number is obtained, the accumulated cylinder deactivation frequency of each air cylinder is obtained, the cylinder deactivation priority is determined according to the accumulated cylinder deactivation frequency and the principle that the priority of the air cylinder with the minimum accumulated cylinder deactivation frequency is the highest, and cylinder deactivation operation is conducted according to the cylinder deactivation priority and the cylinder deactivation number. Uniform use of the air cylinders is achieved, energy conservation and emission reduction are achieved, the engine efficiency is improved, and the service life of the engine is prolonged.

A gas turbine engine has a compression system radius ratio defined as the ratio of the radius of the tip of a fan blade to the radius of the tip of the most downstream compressor blade in the range of from 5 to 9. This results in an optimum balance between installation benefits, operability, maintenance requirements and engine efficiency when the gas turbine engine is installed on an aircraft.

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 invention discloses a control method and device of a hybrid power vehicle and computer equipment, and belongs to the vehicle-mounted field. The method comprises the following steps: acquiring first torque data generated when a power pedal is treaded; decomposing the first torque data to obtain second torque data corresponding to the engine; based on the second torque data, the air inlet amount needed by the engine is determined; and according to the air inflow, third torque data matched with the air inflow are determined from a preset torque matching relation table. The purposes of dynamically adjusting the air inflow of the engine and improving the efficiency of the engine through strategy analysis are achieved, the stability of the output torque of the whole vehicle is ensured in the engine starting or mode switching process, and the driving smoothness and comfort are improved.

A sensor arrangement for a gas powered turbine includes at least one sensor disposed on a power extraction shaft and configured to output a measured power extraction of the power extraction shaft. A controller is in communication with the at least one sensor. The controller includes a memory and a processor. The memory stores instructions for causing the processor to respond to a received measured power extraction of the power extraction shaft by synthesizing an instantaneous engine power output and engine efficiency and adjusting at least one parameter of the engine based on the synthesized engine power output and engine efficiency.

The invention provides a hybrid electric vehicle torque distribution method, device and equipment and a storage medium, and relates to the field of hybrid power system control. The method comprises the steps that multiple pieces of engine alternative point information are determined from an engine efficiency curve, and multiple pieces of generator alternative point information and multiple pieces of driving motor alternative point information are determined according to driver demand torque and the multiple pieces of engine alternative point information; according to the equivalent factor and the multiple groups of alternative point information, determining respective equivalent power of the multiple groups of alternative point information; and according to one group of alternative point information with the minimum equivalent power in the equivalent powers of the multiple groups of alternative point information, target torques and target rotating speeds of the engine, the generator and the driving motor at the current moment are determined. According to the method, the optimal torque distribution scheme under the current working condition can be quickly determined, so that the energy consumption of the power source of the whole vehicle is instantaneously optimal, and the economical efficiency of the whole vehicle is improved.

The invention belongs to the technical field of aviation turbine engines, and discloses an indirect-cooling regenerative water-enhanced turbofan engine which comprises a Brayton cycle and a supercritical water vapor Rankine cycle in a main flow path, and the two cycles are closely connected and are coupled by adding a steam turbine, a steam generator and a condenser. Meanwhile, liquid water can appear at an outlet of the steam turbine, the liquid water is jetted between the high-pressure gas compressor and the low-pressure gas compressor for indirect cooling, the intermediate temperature of the gas compressors is reduced, power consumption of the gas compressors is reduced, unit working medium thrust is improved, an indirect cooler is omitted, and practical application is facilitated; low-temperature steam at an outlet of the steam turbine can be jetted to an inlet of the low-pressure turbine for cooling, the cold air amount can be effectively reduced, and the unit working medium thrust can be effectively improved. The problems of high temperature difference and large loss of a steam generator are effectively solved, and compared with a conventional aero-engine, the total efficiency of the engine can be greatly improved, and the oil consumption rate and pollutant emission are reduced.

The present disclosure provides a system and method for power take-off control. Methods and systems are presented for operating a vehicle powertrain including a power take-off. In one non-limiting example, engine speed may be adjusted to improve engine efficiency during conditions in which the engine is operating in idle conditions over a threshold amount of time, such that fuel consumption and wear may be reduced.

The invention discloses an auxiliary supercharging system, an auxiliary supercharging method and a commercial vehicle. The auxiliary supercharging system comprises a turbocharger, an auxiliary unit and a valve group, an air outlet of the turbocharger is communicated with an intake manifold of the engine, and an air inlet of the turbocharger is communicated with an exhaust port of the engine; the auxiliary unit comprises an air compressor, a dryer, a whole vehicle storage tank and a medium-pressure storage tank, an air outlet of the air compressor is communicated with an air inlet of the dryer, an air outlet of the dryer is communicated with the whole vehicle storage tank and is provided with a regenerated gas loop, a regenerated gas outlet of the dryer is communicated with the medium-pressure storage tank, and the medium-pressure storage tank is communicated with the whole vehicle storage tank and an air inlet manifold; the valve set comprises an air supply valve and an adjusting valve, the air supply valve is arranged on a communicating pipeline of the medium-pressure storage tank and the air inlet manifold, and the adjusting valve is arranged on a communicating pipeline of the medium-pressure storage tank and the whole vehicle storage tank. According to the scheme, air supply of the engine can be improved, the torque range of a low-speed area can be effectively widened, and the efficiency and responsiveness of the engine are improved.

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.