29 results about "Power stroke" patented technology

The swing-arm double-gear power transmission mechanism is a type of engine that eliminates the crankshaft structure of the traditional cylinder piston connecting rod crankshaft engine, replacing it with a swing-arm double-gear power transmission mechanism. This mechanism consists of a straight rod fixed to the piston, a U-shaped gear carrier fixed to the straight rod, and two fork plates under the U-shaped gear carrier, each with a long, narrow opening in the middle. At the rear end of each fork plate, there is also a shaft hole. Between the two fork plates of the U-shaped gear carrier, a pair of meshing gears are installed. A connecting plate is installed on each side of the gears, and each connecting plate has a shaft hole corresponding to the gear shaft position, allowing for sliding fit with the gear shaft or a rolling bearing fit. After passing through the connecting plates, both ends of the gear shaft are fixed to a pair of swing arms. The other end of the upper gear's swing arm is fixed to the power output main shaft and the flywheel energy storage sub-shaft, respectively. The lower gear's swing arm... At the other end, it engages with the shaft holes or rolling bearings on the two fork plates of the U-shaped gear carrier. Driven by the engine starter, the main shaft transmits rotation to the upper gear of this structure, which in turn transmits it to the meshing lower gear. This, in turn, drives the U-shaped gear carrier to move along the direction of the cylinder piston, preparing the engine for the four-stroke power stroke. When the engine ignites and begins the power stroke, the piston drives the U-shaped gear carrier, and through the initial operating mode, the gear set, in turn, pushes the main shaft to continue rotating in the direction it began to rotate, performing power. At the end of the power stroke, the flywheel releases its stored energy, continuing to complete the other strokes of the engine, forming a continuous cycle of power delivery. Because of this continuous cycle, the main shaft continuously outputs power, eliminating all the defects of traditional crankshaft engines. This swing arm double-gear power transmission mechanism has an extremely simple structure, reliable operation, is very easy to manufacture, process, install, and maintain, has low cost, and extremely high thermal efficiency. It is suitable for all applications and equipment using traditional cylinder piston crankshaft engines.

The invention relates to the technical field of data processing, in particular to an engine fault detection method and system. The method comprises the steps that the standardized energy deviation of the current working cycle is determined according to the working condition similarity of the current working cycle and multiple historical reference working cycles in the engine operation process and the vibration energy of vibration signals of all the historical reference working cycles; decomposing the current working cycle into a power stroke and a compression stroke, determining a stroke asymmetric index according to the angular velocity fluctuation degree of the power stroke and the angular velocity fluctuation degree of the compression stroke, and determining an instantaneous risk index of the current working cycle by integrating the standardized energy deviation and the stroke asymmetric index; and performing time sequence accumulation analysis on the instantaneous risk index to detect whether the engine has a fault or not. The method improves the accuracy and reliability of engine fault detection.

The invention discloses a novel technical scheme of a novel internal combustion engine, which is characterized in that a cylinder body of an air cylinder is extended to exceed the length of two air cylinders, cylinder covers are arranged at two ends, gear holes are formed in the middles of the air cylinders, two symmetrically connected pistons are arranged in the gear holes, a connecting body is provided with a strip-shaped concave gear, and four-stroke acting is performed twice; the working sequence is as follows: the piston 2 of the first air cylinder works, the piston 2 exhausts, the piston 3 exhausts, the piston 2 enters, the piston 3 compresses, the piston 2 compresses, the piston 3 works, the gears 20, 21, 24 and 25 are in gear transmission when the piston 2 works, the gears 20, 21, 22 and 23 are in gear transmission when the piston 3 works, the piston 4 enters, the piston 5 compresses, the piston 4 compresses, the piston 5 works, the piston 4 exhausts, the piston 4 exhausts, and the piston 5 enters. Therefore, the power of a traditional four-cylinder engine can be reached or even exceeded by only combining two cylinders, the volume of the engine is reduced, the weight of the engine is reduced, the stability of the piston is improved, and the heat efficiency is improved.

This invention relates to a crankshaft unit, an aero-engine, and an aircraft, belonging to the field of aerospace technology. It solves the problems of excessive weight and vibration when converting automotive engines for aero-engine use. The invention is for automotive-to-aero-engine conversion and includes a crankshaft, a crankshaft pulley, and a flexible disc. The flexible disc is fitted onto one end of the crankshaft and is used to connect to the engine's starter. The crankshaft pulley is located at the end of the crankshaft opposite to the flexible disc. An annular groove is provided on the outer peripheral wall of the crankshaft pulley, and the bottom of the groove has a damping section, which is the impact point of the engine piston during power stroke. This invention achieves a weight reduction similar to that of a dedicated aero-engine when converting an automotive engine for aero-engine use, while also providing superior vibration damping performance.

The invention is called "Cutting Blade", which is a device installed in the engine intake pipe. Through friction, cutting, and heat transfer, it combines the air entering the engine with atomized fuel to form a high-quality mixture, enabling more energy to be released during the explosion and power stroke, and the mixture to burn more completely, achieving the purpose of fuel savings and exhaust gas reduction. Its core principle is to cut, refine, and uniformly heat the air entering the engine. The dominant thinking in the product design and structure is to not only cut the air flowing through the intake pipe but also minimize the resistance of this device to hinder the air from entering the engine. Practice has proven that installing this device can effectively reduce the phenomenon of altitude sickness in vehicles. The technical field to which the invention belongs is: automotive power efficiency, automotive exhaust gas reduction, and technologies for dealing with automotive altitude sickness. The inventor solved the problem of abnormal noise generated by previous similar products during high-speed driving through ingenious design. The result was obtained through a total of six design modifications during the actual test of 90,000 kilometers in seven years.

Disclosed herein are high pressure systems and components thereof including an intensifier pump and asymmetric ram piston. The asymmetric ram piston includes a first effective area upon which a force is exerted during a power stroke of the intensifier pump and a second effective area upon which a force is exerted during a recovery stroke of the intensifier pump. The first and second effective areas are different sizes. Also disclosed herein are methods of assembly of the asymmetric ram piston and methods of operation of the intensifier pump to pressurize a fluid.

The invention relates to the technical field of engine knock detection and control, in particular to an engine knock energy prediction method and device, a vehicle, a storage medium and a product, and the method comprises the steps: obtaining an operation data set of an engine test, including operation data of an engine in a plurality of acting stages and real knock energy corresponding to each acting stage; a training data set and a verification set are generated according to the operation data set, each of the training data set and the verification set comprises a data sample and a real label, the data samples comprise operation data of the engine in the current acting stage, and the real labels are real knocking energy of the data samples; and training a pre-constructed knock energy prediction model by using the training data set, verifying the knock energy prediction model by using the verification set, and predicting the knock prediction energy of the engine by using the currently collected operation data and the knock energy prediction model. Therefore, the problem that the detonation energy prediction precision is poor due to the fact that differential operation working conditions are generated by the hybrid power engine due to power coupling in the related technology is solved.

The utility model discloses a four-stroke free piston engine which comprises two groups of air cylinders which are oppositely arranged, and further comprises a swing gear, a first one-way clutch, a second one-way clutch, a first power output piece and a second power output piece, the swing gear is arranged in a fixed-axis rotating mode, and pistons of the two air cylinders in each group are connected through a push rod. The swing gear is meshed with racks on the two push rods, each air cylinder sequentially completes an air inlet stroke, a compression stroke, an acting stroke and an exhaust stroke, the four strokes form a working cycle, a piston of one air cylinder does work all the time, and the other three air cylinders are synchronously driven to complete the air inlet stroke, the compression stroke and the exhaust stroke respectively. In this way, complex parts such as a push rod, a crankshaft, a high-pressure oil bearing and a high-pressure oil pump in the prior art can be omitted, linear reciprocating motion of the piston is converted into rotating motion so as to output power in the rotating form, meanwhile, the efficiency of the engine is improved, and the engine is suitable for being used as an engine of vehicles such as HEV, PHEV and REEV.

The invention relates to a device (1) for closing and clamping a mould, in particular an injection mould, comprising: a first carrier plate (2), a first mould part being preferably arranged on the first carrier plate (2); a second carrier plate (4) which is arranged parallel to the first carrier plate (2); at least one rod (6) which extends perpendicularly away from the first carrier plate (2) and which is guided through an opening or a recess in the second carrier plate (4) such that the second carrier plate (4) is movable along the rod (6) relative to the first carrier plate (2); at least one controllable clamping / holding device (7) which is operatively connected to the second carrier plate (4) and which is designed and intended, when activated, to hold the second carrier plate (4) on the rod (6) in a first relative position with respect to the first carrier plate (2), and optionally, starting from the first relative position, to move the second carrier plate (4) towards the first carrier plate (2) into a second relative position by means of a power stroke and to hold it there, and which is designed and intended, when deactivated, to release the second carrier plate (4) for movement along the rod (6); and at least one joint arrangement (10) which permits four degrees of freedom, namely two translational degrees of freedom (x, y) in a plane (E) parallel to the carrier plates (2, 4), and two rotational degrees of freedom (RotX, RotY) about directions perpendicular to the rod (6).

The instant invention includes systems for and methods of maximizing efficiencies in an internal combustion engine while minimizing costs and weight for the same and while also minimizing maintenance requirements for the same. Such systems include a compression assembly for compressing fluid to a desired pressure for combustion (such as above 220 psi), a combustion assembly configured to receive at least a portion of the compressed volume of air for each power stroke, and an electrolyzer for separating out hydrogen from the fluid for use as additional fuel during combustion. In this way, the power stroke of the engine is independent of the compression stroke of the engine, thereby eliminating or otherwise minimizing transitional losses associated with the same.

The application belongs to the technical field of underwater propeller, and discloses a control method for periodic swing of bionic hydrofoil, which controls the hydrofoil to swing according to the following periodic swing rule: each swing period of the periodic swing rule is composed of two half periods which are mirror-symmetric about the center position; each half period is sequentially composed of a recovery stroke and a power stroke, wherein the ratio of the maximum angular velocity of the power stroke to the maximum angular velocity of the recovery stroke, i.e. the speed ratio, satisfies the application. Through the provided periodic motion rule, the rigid impact is eliminated, the residence time of the hydrofoil at the center position is prolonged, the propulsion efficiency and the forward distance are effectively improved, and reliable technical support is provided for the engineering propulsion of rigid hydrofoil.

The invention discloses a range extender NVH (Noise Vibration and Harshness) optimization method, a range extender and an electric vehicle, and aims to improve the power generation load power of a range extender controller and reduce the power generation load power of the range extender controller in two stages of an intake stroke and a compression stroke in an adjustment period of the range extender when set conditions are met. Hardware does not need to be changed, NVH optimization of the whole vehicle is achieved by dynamically adjusting the generated power according to the rotating speed difference of the four strokes, and rotating speed jump impact is effectively restrained.

A double-circulation high-power engine is characterized in that an engine piston is designed into double layers which are overlapped together, a lower-layer piston is a main moving piston, an upper-layer piston is an air suction and exhaust piston, and the upper-layer air suction and exhaust piston slides through a positioning sliding rod and a positioning guide pipe in the center of the main moving piston and can be separated from the lower-layer main moving piston to do up-down relative movement; a through conical round hole is formed in the air suction and exhaust piston, and a conical cover plate capable of moving upwards is arranged on the conical round hole; a main movement piston rotates one circle on a crank arm to complete circulation of a compression stroke and a power stroke, an air suction and exhaust piston moves upwards with the help of a separation executing mechanism when the crank arm of the main movement piston rotates to the range of 155 degrees to 205 degrees to complete circulation of the two strokes of air suction and air exhaust, and therefore the circulation of four strokes is actually completed. And the oil-saving effect of a four-stroke engine is also achieved, and the power is doubled.

To provide a more reliable internal combustion engine that addresses concerns about both environment and efficiency.SOLUTION: A self-feeding type four-stroke one-cycle combustion cylinder is partitioned into a pressurized space 102 and a combustion space 112, and a bore size of the cylinder is larger than that of a crank shaft piston 108 accommodated inside. The cylinder includes: an internal structure 106 that is located within the cylinder to act as a secondary piston and is configured to perform piston motion integrally with the crank shaft piston 108; and an oil socket that has a first outer sleeve 114 designed to surround the crank shaft piston 108 and a second inner sleeve 120. This structure can facilitate the piston motion, cause the oil socket to enable direct lubrication of an inner surface of the cylinder from a sump of engine oil and to support exhausting and scavenging without contaminating the combustion space 112, and guide air to a space before compression in a power stroke.SELECTED DRAWING: Figure 1

A method of pumping produced liquids from the depths of a wellbore during a reset stroke and a power stroke of a pump located downhole, wherein the pump comprises an upper barrel, a lower barrel, an upper plunger within the upper barrel, a lower plunger within the lower barrel, an upper ported intake sub with an upper outlet check valve and an upper intake check valve, a dual ported mandrel, and a lower ported intake sub with a lower intake check valve and a lower outlet check valve.

A system includes a condensate injection system configured to fluidly couple to a combustion chamber of a reciprocating engine and an exhaust gas recirculation (EGR) system of the reciprocating engine. The condensate injection system includes a condensate tank configured to store condensate collected from the EGR system. The condensate injection system also includes a pump fluidly coupled to the condensate tank. The condensate injection system also includes an injector fluidly coupled to the pump. The injector is configured to inject condensate into the combustion chamber during a first portion of an engine cycle of the reciprocating engine. The first portion of the engine cycle includes at least part of a power stroke and / or an exhaust stroke of the engine cycle.

The present application relates to the technical field of data processing, in particular to an engine fault detection method and system, the method comprising: determining a standardized energy deviation of a current working cycle by a working condition similarity of the current working cycle and a plurality of historical reference working cycles and vibration energy of vibration signals of each historical reference working cycle during engine operation; decomposing the current working cycle into a power stroke and a compression stroke, and determining a stroke asymmetry index according to an angular velocity fluctuation degree of the power stroke and an angular velocity fluctuation degree of the compression stroke; determining an instantaneous risk index of the current working cycle by integrating the standardized energy deviation and the stroke asymmetry index; and performing time series accumulation analysis on the instantaneous risk index to detect whether the engine has a fault. The method improves the accuracy and reliability of engine fault detection.

Disclosed herein are high pressure systems and components thereof including an intensifier pump and asymmetric ram piston. The asymmetric ram piston includes a first effective area upon which a force is exerted during a power stroke of the intensifier pump and a second effective area upon which a force is exerted during a recovery stroke of the intensifier pump. The first and second effective areas are different sizes. Also disclosed herein are methods of assembly of the asymmetric ram piston and methods of operation of the intensifier pump to pressurize a fluid.

The invention provides a range extender misfire diagnosis method, device and equipment and a medium, and relates to the technical field of hybrid electric vehicles. The method comprises the following steps: determining a first rotary change signal corresponding to a target falling edge of the cam shaft based on a target rotary change signal of the rotating shaft; based on the first resolver signal and a target pitch, determining a second resolver signal corresponding to a compression top dead center of a first cylinder in the plurality of cylinders; determining a mapping relation between a current rotary change signal of the rotating shaft and a crankshaft rotation angle of the crankshaft based on the second rotary change signal; based on the mapping relation, the first duration of the power stroke of combustion of the target air cylinder in the multiple air cylinders is determined; and determining whether the range extender is on fire or not based on the first duration. According to the range extender misfire diagnosis method, device and equipment and the medium provided by the invention, the accurate diagnosis of the misfire of the range extender can be realized.

The application discloses a kind of unequal distance stroke inertia reset high-efficiency internal combustion engine, belong to internal combustion engine technical field.This internal combustion engine is without inertia component such as crankshaft, flywheel, including at least two groups of piston power unit, power output mechanism, piston reset system, ignition and gas distribution system and water injection secondary power cooling system;Piston two ends are equipped with force transmission structure to realize bidirectional stress movement, power output mechanism is equipped with power output disengaging device to control power on-off, each group of piston is mechanically linked by piston reset system, and one group of piston power stroke drives another group of piston reset;Piston is asymmetric unequal distance structure, long end power, short end reset, power end low speed reset, ignition and gas distribution system burns at fixed point position in short end, and water injection system realizes secondary power in long end high temperature area.This application reduces the inertia loss of traditional internal combustion engine from structure, effectively improves power-on ratio, is compact in structure, runs smoothly, is flexible in arrangement, and is suitable for various internal combustion engine scenes.

An enhanced efficiency internal combustion engine is described. The engine may include a piston and a gear assembly capable of causing the duration of a piston power stroke to exceed that of the piston's compression stroke. One example of the engine of the present invention involves a gear assembly with non-circular gear pairs at crank and output shafts. The non-circular gears may increase the duration of the piston down stroke per combustion event, and decrease the duration of the piston up stroke per combustion event, resulting in greater fuel efficiency of the engine. The engine may be employed in various different vehicles or other internal combustion engine-utilizing devices.

To provide a more efficient and reliable self-feeding type four-stroke one-cycle combustion cylinder for an internal combustion engine that addresses concerns about both the environment and efficiency.SOLUTION: A combustion cylinder defines an internal space partitioned into a pressurized space and a combustion space. A bore size of the cylinder is larger than that of a crank piston located inside. The cylinder includes: an internal structure 106 that is located within the cylinder to act as a secondary piston and that moves integrally with the crank piston; and an oil socket that has a first outer sleeve 114 designed to surround the crank piston 108 and a second inner sleeve 120. The oil socket is configured to enable direct lubrication of an inner surface of the cylinder from a sump of oil, and supports exhausting and scavenging without contaminating the combustion space. An intake assembly capable of guiding air to a space before compression in a power stroke is provided. Air is inductively transmitted to the combustion space in a retract stroke.SELECTED DRAWING: Figure 1

This invention discloses a two-stage combustion six-stroke engine, comprising a single-cylinder engine body, a fuel injector, and a valve train unit disposed on the cylinder head; the valve train unit includes a gas reservoir, a first intake port, a second intake port, and a gas injector, used to compress and store gas and release gas; the center of the injector nozzle is located on a first axis; the centers of the gas reservoir and the injector nozzle are located away from the first axis to form tumble flow in the combustion chamber; the six-stroke engine utilizes the gas reservoir and part of the first intake port to achieve two consecutive compression and combustion of the working fluid in the same cylinder; moreover, in the second compression and combustion power stroke, the gas injected into the combustion chamber by the gas injector interacts with the in-cylinder airflow formed near the gas reservoir, forming enhanced tumble flow in the combustion chamber.

The instant invention includes systems for and methods of maximizing efficiencies in an internal combustion engine while minimizing costs and weight for the same and while also minimizing maintenance requirements for the same. Such systems include a compression assembly for compressing fluid to a desired pressure for combustion (such as above 220 psi) and a combustion assembly configured to receive at least a portion of the compressed volume of air for each power stroke. In this way, the power stroke of the engine is independent of the compression stroke of the engine, thereby eliminating or otherwise minimizing transitional losses associated with the same.

An efficient energy-saving curved groove structure of an internal combustion engine relates to the technical field of internal combustion engines and comprises an engine body, a gear and a connecting rod. A connecting rod is movably arranged in the machine body, and the two gears are meshed with each other and arranged outside the machine body; the two ends of the cylinders are rotationally mounted in the machine body through bearing bushes; a curved groove is formed in the cylindrical surface of the cylinder; the two cross rods are symmetrically installed on the two side walls of the connecting rod, and the outer ends of the two cross rods are movably inserted into the curved grooves. Except the power stroke, the suction stroke, the compression stroke and the exhaust stroke are all under the inertia effect, the small arc-shaped grooves are used for driving the connecting rod to move, kinetic energy consumption can be effectively reduced, and the purpose of saving energy is achieved.

A crank assembly for a bicycle comprises a crank shaft, a crank arm installed on the crank shaft to drive the crank shaft to rotate, a bearing shaft installed on the crank shaft in a sliding mode and sliding relative to the crank shaft, and a chain wheel installed on the bearing shaft. The position sensor is used for determining the relative position of the diameter axis of the sprocket relative to the central longitudinal axis of the crank arm at the end of the power stroke. Further, an actuator is connected to the carrier shaft to operate the carrier shaft to slide the carrier shaft, and a controller is configured to drive the actuator based on an input of the position sensor to slide the carrier shaft relative to the crankshaft to change a start time of a power stroke of the sprocket.

The invention relates to the technical field of engines, and discloses an engine structure, an engine structure operation method and a carrier, the engine structure comprises a piston assembly arranged in an air cylinder cavity, a connecting rod rack set connected with the piston assembly, and rack parts arranged on the two sides of the connecting rod rack set; meshing sections are arranged in the circumferential direction of the driving gear at intervals; the number of meshing teeth of the meshing section and the rack part is n1 in the compression stroke, the number of meshing teeth of the meshing section and the rack part is n2 in the expansion acting stroke, and n1 is smaller than n2. According to the engine structure, it is guaranteed that the transmission interval of the power stroke is longer, the expansion ratio is larger than the compression ratio, and the energy conversion efficiency is improved.

This invention discloses a method for setting the camshaft valve timing of a hydrogen-rich gas engine, specifically including the following steps: At the end of the piston's exhaust stroke, when the exhaust valve is open and the piston is pushing the gas in the cylinder upwards for exhaust, the intake valve is opened before the piston reaches top dead center (TDC). Then, the exhaust valve is delayed in closing after the piston has passed TDC and moved a short distance downwards. Next, the intake valve is delayed in closing after the piston has passed bottom dead center and moved a short distance upwards. The crankshaft rotation causes the piston to move upwards, compressing the gas in the cylinder. At the end of the piston's power stroke, the exhaust valve is opened earlier before the piston reaches bottom dead center for early exhaust. This method for setting the camshaft valve timing of a hydrogen-rich gas engine belongs to the field of diesel engine technology. By using early opening or delayed closing to extend the intake and exhaust times, the crankshaft angles corresponding to the actual intake and exhaust strokes of the engine are both greater than 180°, allowing for more complete intake and more thorough exhaust, thereby improving engine power.