46results about "Combustion process measures" patented technology

The present invention generally relates to providing an air supply for components associated with an engine. More particularly, the present invention relates to a system and method for using compressed air generated by a split-cycle engine to power components such as valves or air springs associated with the split-cycle engine.

An internal combustion engine includes an exhaust manifold; an intake manifold; and a turbocharger including a turbine in communication with the exhaust manifold, and a compressor in communication with the intake manifold. An electrical generator is coupled with the turbine. A motor receives electrical input power from the generator and provides mechanical output power. A combustor selectively provides additional input power to the motor.

An internal combustion engine with a crankshaft, at least one compression piston which is housed in a compression cylinder, and at least one working piston which is housed in a working cylinder. Movement of the compression piston and of the working piston are coupled kinematically to movement of the crankshaft, so that the compression piston moves back and forth during a single revolution of the crankshaft in an intake stroke and a compression stroke and that the working piston moves back and forth during a single revolution of the crankshaft by a working stroke and an exhaust stroke. The compression cylinder has at least one inlet valve for drawing-in air into the compression cylinder during downward movement of the compression piston, and the working cylinder has at least one outlet valve for discharging combustion gases from the working cylinder during upward movement of the working piston.

Provided is a device (1) and a method for treating waste gas of a large diesel engine (2). The device (10) has an elongated exhaust gas manifold (7) with a plurality of inlets (7.1a, 7.1a', 7.1a'', 7.2a, 7.2a') distributed along a longitudinal direction thereof for receiving exhaust gas from the large diesel engine, and the device (10) also comprises an elongated catalytic converter container (8) connected to the exhaust gas manifold, wherein, a plurality of catalytic converter components are arranged in the container, and the container has an outlet (8a). The exhaust gas manifold (7) and the catalytic converter container (8) are arranged parallel to each other and separated from each other by a partition wall (9) extending along the longitudinal direction. The exhaust gas manifold (7) is connected to the catalytic converter container (8) via orifices (9.1a, 9.2a), which are provided in the partition wall (9), to guide the exhaust gas to the corresponding outlet (8a) during operation of the device through the catalytic converter components.

A neat-fuel direct-injected compression ignition engine having a thermal barrier coated combustion chamber, an injection port injects fuel that satisfies a stoichiometric condition with respect to the intake air, a mechanical exhaust regenerator transfers energy from exhaust gas to intake compression stages, an exhaust O₂ sensor inputs to a feedback control to deliver quantified fuel, a variable valve actuation (VVA) controls valve positions, an exhaust gas temperature sensor controls exhaust feedback by closing the exhaust valve early according to the VVA, or recirculated to the chamber with an exhaust-gas-recirculation (EGR), heat exchanger, and flow path connecting an air intake, a load command input, and a computer operates the EGR from sensors to input exhaust gas according exhaust temperature signals and changes VVA timing, the load control is by chamber exhaust gas, the computer operates a fuel injector to deliver fuel independent of exhaust gas by the O₂ signals.

The invention relates to the technical field of universal small two-stroke engines, in particular to a closed scavenging channel with a cylinder body for stratified scavenging two-stroke engines. The closed scavenging channel comprises closed scavenging ways with the cylinder body, groove channels in the flange surface of the cylinder body and sheets matched with the groove channels for forming gas inlet channels; the groove channels are provided with expansion channels of variable-section structures; the closed scavenging ways, the groove channels and the expansion channels communicate with one another. The flange surface of the cylinder body and different through holes in the sheets are matched for forming the length-changeable closed scavenging channel with the cylinder body; by increasing the length of the closed scavenging channel, stratifying of pure air and mixed gas can be promoted, the stability of carrying out early scavenging on tail gas by the pure air can be improved, loss of the mixed gas can be reduced, the scavenging stability of the mixed gas can be improved, the scavenging speed can be increased, the scavenging direction can be stabilized, the power and the stability at high speed and low speed of the engines can be effectively improved, and tail gas emission can be reduced.

The invention discloses a tumbler and piston type engine. The engine comprises a cylindrical block, a transmission shaft, a fuel air cylinder group and a first linkage assembly; an accommodating cavity is formed in the cylindrical block; the transmission shaft is rotationally arranged on the axis of the cylindrical block; a first flat cam is fixed on the transmission shaft; a driving surface and a stressed surface which are centrosymmetric are arranged at each of two ends of the first flat cam; the fuel air cylinder group comprises a first fuel air cylinder, a second fuel air cylinder, a third fuel air cylinder, a fourth fuel air cylinder and piston-connecting rod assemblies arranged in the four fuel air cylinders; the first fuel air cylinder, the second fuel air cylinder, the third fuel air cylinder and the fourth fuel air cylinder are arranged sequentially; an air inlet and an air exhaust port are formed in two sides of the middle of the cylinder block part of each fuel air cylinder; the first linkage assembly comprises two strip-shaped tumblers and two V-shaped tumblers; and the reciprocating movement of pistons in the four fuel air cylinders drives the transmission shaft to rotate through extrusion of the driving surfaces and the stressed surfaces by the aid of the inner side surfaces of the two strip-shaped tumblers and the two V-shaped tumblers. The engine is high in energy conversion efficiency and simple and reasonable in structure.

The invention discloses a crosshead type large-scale turbocharging two-stroke compression ignition internal combustion engine having a waste gas cleaning system. The crosshead type large-scale turbocharging two-stroke compression ignition internal combustion engine includes: a turbocharger having a waste gas drive turbine connected to a compressor for transmission boosting and scavenging; a plurality of cylinders which is connected to a scavenging receiving member and a waste gas receiving member; a selective catalytic reduction reactor which has an inlet connected to an outlet of the waste gas receiving member; an exhaust duct for connecting an outlet of the selective catalytic reduction reactor to an inlet of a turbine; a scavenging duct which connects an outlet of the compressor to an inlet of the scavenging receiving member via a scavenging cooler; an auxiliary blower which can assist the compressor during low load of an engine in the scavenging duct; a controllable bypass duct which extends to a position of the exhaust duct from a position of the scavenging duct; a electronic control bypass blower which is used for assisting flow of scavenge air from the scavenging duct to the exhaust duct; and an electronic control unit.

An internal combustion engine using a two stroke cycle includes a pair of opposing cylinder units, each of which are located on opposing sides of a crankcase. In each cylinder unit is a cylinder with a piston disposed in the cylinder. Each piston is coupled to a piston rod that is aligned along an axis that passes through the center of each cylinder bore. The piston rods pass through the crankcase wall into the crankcase chamber, and are further coupled to a yoke. Each cylinder unit has an intake channel from the crankcase chamber to a cylinder intake port in the cylinder. As the piston traverses its upstroke in its cylinder, it creates a vacuum under the piston. At the top of its stroke a piston intake port becomes aligned with the cylinder intake port, allow fuel to be drawn into the cylinder under the piston. As a result, a continuous vacuum is experienced in the crankcase without the need for mechanical valving arrangements.

The invention discloses a composite supercharging air inlet system of a two-stroke engine with horizontally-opposed piston and opposed cylinder, comprising a turbosupercharger, a mechanical supercharger, intercoolers, a flywheel casing and related air inlet pipes. In work, air from an air filter enters the volute of the mechanical supercharger via the related air inlet pipes, is supercharged and then reaches the first stage of intercooler through the air inlet pipe, is subjected to intercooling and then reaches the turbosupercharger through the air inlet pipe, is supercharged again and then reaches the second stage of intercooler along the air inlet pipe, is subjected to intercooling again and then reaches a voltage stabilizing chamber in the flywheel casing through the air inlet pipe, and finally reaches the air inlet channel of the engine through the pipe, thus realizing two stages of supercharging. When the engine is in low revolution speed, supercharging pressure is provided mainly by the mechanical supercharger, which is favorable for improving the scavenging and torque output when the engine is in low revolution speed; and along with promotion of the rotation speed of the engine, the turbosupercharger starts to provide more supercharging pressure, and due the common effect of the two, the requirement of supercharging of the engine can be met.

The invention discloses a novel two-stroke internal combustion engine. The novel two-stroke internal combustion engine is characterized in that an inlet casing (1) is provided with an inlet casing piston (3), and an exhaust casing (2) is provided with an exhaust casing piston (4); the inlet casing piston (3) is connected with a crankshaft (9) through an inlet casing connecting rod (5) and an inlet casing crank throw (7) in sequence, and the exhaust casing piston (4) is connected with the crankshaft (9) through an exhaust casing connecting rod (6) and an exhaust casing crank throw (8) in sequence; one end of the inlet casing (1) and one end of the exhaust casing (2) are each provided with an end cap (10); air inlets (11) and exhaust holes (12) are formed in the casing walls of the inlet casing (1) and the exhaust casing (2) correspondingly; communicating cavities (13) used as a part of combustion chamber are arranged between the inlet casing (1) and the end cap (10) and the exhaust casing (2) and the end cap (10); and an included angle alpha which is an acute angle is formed between the inlet casing crank throw (7) and the exhaust casing crank throw (8). The structure of a traditional two-stroke internal combustion engine is simplified, the pressure in a combustion cavity is increased, and the combustion efficiency of fuel oil is further improved.

The invention discloses an adjustable tilting tray type crankshaft-free variable displacement engine which comprises an engine body, a main shaft, tilting tray mounting seats, tilting trays, a tilting tray adjusting mechanism, a piston air cylinder assembly, a valve control mechanism and the like. The tilting tray adjusting mechanism converts main shaft rotation into three-dimensional swing of the tilting trays around the center of a movement pair formed by connecting the tilting trays and the tilting tray mounting seats, and a connection rod is utilized to drive the piston air cylinder assembly to complete thermotechnical cycle; meanwhile, the tilting tray adjusting mechanism adjusts the tilting angle of the tilting trays according to the positions of the tilting trays so as to change the air cylinder work volume, and the distance between an upper stop point and the top of an air cylinder and the distance between a lower stop point and the top of the air cylinder are made to meet the thermotechnical cycle compression ratio; the main shaft drives the valve control mechanism to rotate, and opening/closing control over a valve assembly of the piston air cylinder assembly is achieved so that a valve and a piston air cylinder can work in a coordinate mode. By means of the adjustable tilting tray type crankshaft-free variable displacement engine, dynamic adjustment of engine displacement is achieved, the engine is always maintained to be in the best compression ratio, thermotechnical cycle efficiency is greatly improved, mechanical efficiency of the engine is improved, and oil consumption and emission of the engine are lowered.

The invention relates to a direct-current layered scavenging two-stroke engine. The direct-current layered scavenging two-stroke engine comprises an air cylinder body, a crankcase, a piston, a crankshaft flywheel set, an exhaust port, a main air inlet reed valve, a piston pin, sparking plugs, a main scavenging channel pipe, a main scavenging channel port, scavenging ports, an auxiliary scavengingchannel pipe, an auxiliary air inlet reed valve and an air storage spiral coil, wherein the main scavenging channel pipe is arranged at the top of the piston, the upper port is located in the auxiliary scavenging channel pipe, the lower end of the main scavenging channel pipe penetrates through the top of the piston and communicates with fuel gas in the crankcase, the auxiliary scavenging channelpipe is located on an air cylinder cover and penetrates through the air cylinder cover to enter a combustion chamber, the plurality of scavenging ports are uniformly distributed in the part, enteringthe combustion chamber, of the auxiliary scavenging channel pipe, and fuel mixed gas which is sucked by the main air inlet reed valve and fuel mixed gas which is sucked by the auxiliary air inlet reedvalve are mixed with air in the internal space of the piston to form an air layer, a fuel mixed gas diluting layer and a fuel mixed gas layer. According to the direct-current layered scavenging two-stroke engine, direct-current scavenging and layered scavenging are combined, so that the scavenging efficiency of the two-stroke engine is further improved.

With reference to FIG. 1A, the present invention provides a two-stroke internal combustion engine comprising: a piston (19) reciprocable within a cylinder (20); an exhaust port (23) allowing communication of the cylinder (20) with an exhaust passage (24), which port (23) is opened and closed by the piston during the reciprocal motion thereof; moveable shutter means (1) for varying the effective area of the exhaust port (23), which shutter means (1) varies the effective area cyclically in a timed relationship to the reciprocal motion of the piston (19) within the cylinder (20); a compression ratio variation mechanism (41) additional to and separate from the moveable shutter means (1) for varying a compression ratio of the cylinder (20); sensor means (12, 14, 34) for measuring one or more operating characteristics of the engine and for generating signals corresponding thereto; and a control unit (11) which processes the signals generated by the sensor means (12, 14, 34) and controls the motion of the shutter means (1) accordingly and control the effective area of the exhaust port (25) and controls the compression ratio variation mechanism (41) to independently vary the compression ratio of the cylinder (20).

The invention discloses a two-stroke engine using a left box body with a separating wall containing multiple through holes to assist in scavenging. The two-stroke engine has the beneficial effects that the left box body is provide with the separating wall containing the multiple through holes, and thus manufacturing difficulty can be greatly and revolutionarily lowered; due to the facts that die-casting of the demolding separating wall can be performed on the box body of the plain structure easily, and die-casting of the demolding separating wall cannot be achieved easily on a complex piston cylinder block at the deep place, three sections of arc lines are arranged at the upper side of the separating wall, the arc line located in the middle of the three sections of arc lines is a circular arc line (527), and the arc lines located at the two sides of the three sections of arc lines comprise a logarithmic spiral section (525) and a cubic curve section (526); the cross section of the piston is the cubic curve section; the external contour of a valve plate of a carburetor is a cubic curve, and the face of the valve plate of the carburetor on the engine is also a cubic curve; a plurality of kinematic pairs of the engine are coated with indium and cadmium; and a hydrogen fuel tank and an oxygen bottle are used in the engine.

Implementations are disclosed herein that relate to a cylinder occupying structure. An example provides a cylinder system comprising a mechanical cylinder including an internal space in which a fluid is introduced, and a piston configured for reciprocating motion in the internal space, and a cylinder occupying structure including an insertion rod acting as a second piston, wherein the insertion rod is variably inserted into, and retracted from, the internal space of the cylinder in correspondence with the reciprocating motion of the piston and where parts of the insertion rod and the piston may surround the combustion space, and where fluid compression and fluid combustion is conducted within separate spaces.

The invention discloses a scavenging system of a two-stroke engine. The system comprises a cylinder provided with a combustion acting chamber, a crankshaft box provided with a crankshaft chamber, a piston and a crankshaft assembly, wherein a fresh mixed air inlet and an exhausting port are formed in the cylinder; a thick mixed air scavenging channel and a thin mixed air scavenging channel are arranged in the crankshaft chamber; the thick mixed air scavenging channel is provided with a first air inlet and a first air outlet; the thin mixed air scavenging channel is provided with a second air inlet and a second air outlet; the thick mixed air scavenging channel and the thin mixed air scavenging channel are arc-shaped and clung to the inner walls of two sides of the crankshaft chamber; a first scavenging port and a second scavenging port are formed in the combustion acting chamber; the first scavenging port is far away from the exhausting port and communicates with the first air outlet; the second scavenging port is close to the exhausting port and communicates with the second exhausting port; a first oil stopping rib and a second oil stopping rib are correspondingly arranged on the thick mixed air scavenging channel and the thin mixed air scavenging channel. According to the system, a layered scavenging state can be formed, so that the content of harmful components in exhaust gas can be reduced, and as a result, the environment can be protected; the consumption of oil in use can be saved.

The invention belongs to the technical field of diesel engines, and discloses an exhaust and scavenging system of a two-stroke diesel engine. The exhaust and scavenging system comprises an exhaust device and a scavenging device, wherein a waste gas post-treatment unit is selectively arranged on one side, facing the scavenging device, of the exhaust device; the scavenging device is provided with two connection states: when the exhaust device is provided with the waste gas post-treatment unit, a second connection unit is arranged on one side, facing the exhaust device, of the scavenging device,and the second connection unit is configured to be connected with the waste gas post-treatment unit; and when the exhaust device is not provided with the waste gas post-treatment unit, a first connection unit is arranged on one side, facing the exhaust device, of the scavenging device, and the first connection unit is configured to be connected with the exhaust device. The exhaust and scavenging system has the beneficial effects that the waste gas post-treatment unit is selectively arranged between the exhaust device and the scavenging device, different connection units are arranged accordingto whether the waste gas post-treatment unit is arranged or not, and the different connection units do not affect the overall dimension of a main engine, so that different transformation requirementsare met.

The invention discloses a high-efficiency low-emission time stratified scavenging small two-stroke gasoline engine. The gasoline engine comprises a crankcase chamber and an air cylinder which communicate with each other. A piston is arranged in the air cylinder, air storage cavities are formed in the side faces of the piston, one end of a pure air channel in the piston is arranged on the side face of the piston, and the other end of the pure air channel communicates with the air storage cavities. A mixed gas inlet, a pure air inlet, scavenging ports and an exhaust port are formed in the wall of the air cylinder, an air inlet pipe and a double-cavity carburetor are further included, one end of the air inlet pipe is connected to the position, where the mixed gas inlet and the pure air inlet are located, of the wall of the air cylinder, the other end of the air inlet pipe is connected with the double-cavity carburetor, scavenging chambers are formed in the positions, corresponding to the scavenging ports, of the outer wall of the air cylinder, and the bottoms of the scavenging chambers communicate with the interior of the air cylinder. The gasoline engine can effectively reduce the pollution of discharged tail gas.

The invention relates to the field of gas power, in particular to a two-phase outwards-convex wheel shock-wave roller pin and roller block transmission internal combustion engine. According to the novel internal combustion engine provided by the invention, eight cylinders are annularly, symmetrically and evenly distributed on the periphery of an outwards-convex inner gear, and resultant force on the outwards-convex inner gear is zero; cylinder pistons directly act on the outwards-convex inner gear through push rods, and power is transmitted to an output shaft in key joint with a two-phase outwards-convex wheel from the outwards-convex inner gear through transmission of two-phase outwards-convex wheel shock-wave roller pin and roller block movable teeth. According to the internal combustion engine, connecting rods and crankshafts of traditional internal combustion engines are omitted, a two-phase outwards-convex wheel shock-wave roller pin and roller block transmission mechanism of the engine is free of eccentric mass and has the characteristic of inertia force and working load self-balancing, and the rotating speed of the output shaft is determined by the transmission ratio of the movable teeth; if a movable tooth rack is fixed, the two-phase outwards-convex wheel conducts output at a high speed, and the internal combustion engine can be widely applied to the fields needing high rotating speeds, such as helicopter engines and small generators; when the output rotating speed is fixed, emission of harmful gas can be reduced. The internal combustion engine is simple and compact in structure, small in axial size, self-balanced in stress and stable in operation.