101results about How to "Change the compression ratio" patented technology

This invention relates to a laser pulse expansion and compression device charactering that it is composed of a super-short pulse laser, a chirp control system, an energy control system, a non-linear action system, a dispersion compensation system and a test system, which can either expand spectrums and compress pulses or compress spectrums and expand pulses.

The invention discloses a hydraulic-drive type variable-compression-ratio piston connection rod assembly in order to solve the problems that in the prior art, a mechanism is complex, abrasion is large and control precision is low. The hydraulic-drive type variable-compression-ratio piston connection rod assembly comprises a piston, an extension spring, a piston pin, a connection rod, a three-position four-way electromagnetic valve, a hydraulic pump, a one-way valve and other hydraulic elements. Engine oil is pumped out by the hydraulic pump, after the direction of the engine oil is changed through the three-position four-way electromagnetic valve, the engine oil sequentially flows in an oil way of the connection rod and an oil way of the piston pin, and finally a push rod ejects a small ball in the one-way valve so that the size of a main oil cavity is reduced and the compression ratio of an engine is reduced. By means of the mode that the pressure of the engine oil in the oil way on the lower portion of the piston is increased and the small ball of the one-way valve is ejected, the size of the main oil cavity is increased, and accordingly the compression ratio of the engine is increased. The compression ratio piston uses a hydraulic mechanism mode, is quick in response, high in precision and high in reliability, and meets requirements of the engine for dynamic performance and fuel economy under various working conditions.

The invention discloses a mechanical auxiliary homogeneous charge compression ignition control system for a combustion engine. The mechanical auxiliary homogeneous charge compression ignition control system for the combustion engine comprises a driven chain wheel, a driven chain wheel shaft, a first sliding bearing, a second sliding bearing, a driving chain wheel, a driving chain wheel shaft, a gear, a rack, a gradually-changed cam, a cam shaft, a transmission rod, a first disc, an energy storage spring, a second disc, a pressure rod, a return spring, an auxiliary cylinder piston, an auxiliary cylinder, a sensor used for measuring the displacement of the auxiliary cylinder piston, a motor and an electronic control unit. The mechanical auxiliary homogeneous charge compression ignition control system for the combustion engine achieves accurate control over ignition moments, can collect redundant energy, improves efficiency and facilitates saving energy.

The present invention provides an engine with variable compression ration comprising a cylinder cover, a cylinder body, a power output shaft and a crankshaft box, the cylinder cover is fixed on the cylinder body, the crankshaft box is formed with the cylinder body integrally; In the cylinder body, an piston is connected with a crankshaft via a connecting rod; the power output shaft is mounted on the crankshaft box; a power output gear is placed on the power output shaft, an input gear is placed on a crank journal of the crankshaft, the power output gear engages with the input gear; A supporting arm is placed in the crankshaft box, the crankshaft is hinged on the supporting arm; one end of the supporting arm is hinged on the crankshaft box, and the hinging shaft is the power output shaft; the other end of the supporting arm is a control end, the control end is connected with a rotation control mechanism, which can make the supporting arm rotate around the power output shaft. Since the rotation control mechanism is used to make displacement control over the control end of the supporting arm, the compression ratio of engine matches the engine behavior, so that the efficiency is improved while the emission is reduced.

A variable compression ratio device mounted to an engine, the engine rotating a crankshaft using a combustion force of a gas mixture and a piston, the variable compression ratio device changing a compression ratio of the mixture and including a connecting rod including a small end rotatably connected to the piston and a big end formed with a circular hole to be eccentrically rotatably connected to the crankshaft, a crank pin provided in the crankshaft, an eccentric cam provided to be concentrically rotatable in the hole of the big end and having a crank pin mounting hole eccentrically inserted with the crank pin to be rotatably connected, and a cam rotation unit provided inside the eccentric cam and rotating the eccentric cam in a clockwise or counterclockwise direction in a hole of the big end by a selectively supplied hydraulic pressure.

A variable compression ratio piston (26) and connecting rod (18) assembly for an internal combustion engine (14) includes an eccentric bushing (28) that carries a piston pin bushing (42) and contains a journaled portion (48) held in the rod bore (24) of the connecting rod (18). The eccentric bushing (28) can be selectively rotated between either of two angle adjusted positions to effect a change in the height of the piston (26) relative to the connecting rod (18), and thus change the compression ratio of the assembly. A latch (50) mechanism is actuated by oil jets (90, 91) external to the connecting rod (18). The latch (50) includes bolts (54, 56) with tapered tips that seat in oblong holes (60, 62) in a flange plate (58) to reduce destructive lash. A resilient stop post (80) bears the brunt of stresses associated with stopping the flange plate (58) during switching events to protect the latching bolts (54, 56).

The invention concerns a combustion engine, comprising at least one cylinder with in it two oppositely directed reciprocating pistons, which are each connected via a piston rod with a corresponding arm, whereby each arm shows an opening in which a main shaft that connects the two arms is rotatably supported in bearings, which main shaft includes an angle with a centre line of each opening, and means for varying the compression ratio in the cylinder, which compression ratio variation means comprise a division in the main shaft, as well as drive means in order to move the parts formed by it of the main shaft apart from each other. The combustion engine can be provided with at least one spark plug, which protrudes through the bottom of one of the pistons. The combustion engine can also be provided with means for the metering to the cylinder of a supply of air or a fuel / air mixture, which supply means comprise a rotatable metering device along at least one supply opening, connected with the main shaft, which shows at least one metering opening, which can be brought into governing with the supply opening via rotation of the metering device.

The invention discloses a length variable connecting rod which comprises a connecting rod main body, an eccentric part, a limiting component and a valve core. According to the connecting rod disclosedby the invention, an effective length of the connecting rod can be controllable and variable, so that the compression ratio of a gasoline engine is changed, the thermal efficiency of partial load ofthe gasoline engine can be improved, engine knocking during full load can be avoided, and the reliability and economical efficiency of the engine are effectively improved. The length variable connecting rod disclosed by the invention is simple and reliable in structure, small in size, low in cost and excellent in applicability of the existing volume production models. The length variable connecting rod disclosed by the invention is also applicable to a diesel engine.

An internal combustion engine includes a crankshaft rotatably supported by an engine block, and rotatable about a crank axis. A control shaft is rotatably supported by the engine block, and rotatable about a control axis. A link rod is rotatably connected to the crankshaft. A lower connecting rod includes a first end rotatably connected to the link rod, and a second end rotatably connected to the control shaft. An upper connecting rod is rotatably connected to the link rod and a piston. The second end of the lower connecting rod and the control shaft are rotatably connected at a location offset from the control axis to define an eccentric connection relative to the control axis. Rotation of the control shaft about the control axis rotates the second end of the lower connecting rod about the control axis to adjust a compression stroke length of the piston.

The invention discloses a compression ratio adjustment method for a diesel main engine of a ship propulsion system. The thickness of an adjusting washer between a piston rod of a cylinder and a cross head of the diesel main engine is adjusted, and the compression ratio of the diesel main engine can be changed. According to the compression ratio adjustment method for the diesel main engine of the ship propulsion system, the thickness of the adjusting washer between the piston rod and the cross head is changed, related movement traces are not changed or affected as compared with change of the washer at a large head end of a connecting rod, complicated movement traces do not need to be checked, the compression ratio of the diesel main engine can be changed at low cost and matched with a supercharger of a ship, the combustion condition of diesel is improved, and unit oil consumption of the diesel main engine is reduced, so that energy is saved and emission is reduced.

The invention discloses an engine, relates to the technical field of engines, and can solve the problems of complex structure and weaker reliability of a traditional variable compression engine. The engine comprises a cylinder cover, a cylinder body, and a piston arranged in the cylinder body, wherein a combustion chamber is formed between the piston and the cylinder cover. The engine further comprises an auxiliary cylinder barrel, an auxiliary piston and a driving mechanism, wherein the auxiliary cylinder barrel is arranged on the cylinder cover in a penetrating manner, and is communicated with the combustion chamber; the auxiliary piston is sealed in the auxiliary cylinder barrel; the axis of the auxiliary piston is overlapped with the axis of the auxiliary cylinder barrel; the auxiliary piston can reciprocate in the auxiliary cylinder barrel in the axis direction; and the driving mechanism is arranged at one side, far from the combustion chamber, of the cylinder cover, is connected with the auxiliary piston, and provides power for the reciprocating motion of the auxiliary piston. The engine can be used for an automobile power system.

The invention relates to an engine and a vehicle. The engine comprises a cylinder body and a crankshaft. The cylinder body comprises an air cylinder (2), a cylinder sleeve (3) arranged in the air cylinder (2) in a sleeved mode and a piston (4) making reciprocating motion in the inner wall of the cylinder sleeve (3). A connecting rod is connected between the piston (4) and the crankshaft. The inner wall and the outer wall of the cylinder sleeve form an eccentric structure so that the relative position of the piston (4) and the air cylinder (2) can be adjusted when the cylinder sleeve (3) rotates. When the cylinder sleeve of the engine rotates in the air cylinder, the piston can make axial motion in the cylinder sleeve as the position of the connecting rod is basically kept unchanged, so that the relative position of the piston and the cylinder sleeve can be adjusted, and the compression ratio of the engine is changed.

The invention discloses an energy-saving engine. The engine comprises a cylinder body, a cylinder cover, a cylinder head cover, a cylinder barrel, a crankshaft, a connecting rod and a piston, and is characterized in that a flat bar is arranged at the top end of the cylinder cover; a cam is arranged above the flat bar and fixedly connected onto a cam shaft; oblique insection and a sliding wheel matched with the oblique insection are arranged at one end of the cam shaft; the sliding wheel is driven by a crankshaft gear at one end of the crankshaft through a transmission mechanism, and a relative angle between the cam and the crankshaft can be changed by the transmission mechanism; the upper edge periphery of the cylinder cover and the lower edge periphery of the cylinder head cover are connected through an upper rubber sleeve, and the lower edge periphery of the cylinder cover and the upper edge periphery of the cylinder body are connected through a lower rubber sleeve; and two pins are symmetrically arranged on the left lower surface and the right lower surface of the cylinder cover, sleeves glidingly matched with the pins are arranged on the left upper surface and the right upper surface of the cylinder body, and springs are arranged on the outer sides of the pins and the sleeves in a sleeving manner. According to the energy-saving engine, the compression ratio of the engine can be changed, the structure is simple, the control is facilitated, engine power can be effectively improved, and fuel economy is improved.

The invention discloses an improved variable compression ratio piston for an internal combustion engine, which relates to an optimization design for a variable compression ratio piston with the publication number of CN101900056A. A mechanically-elastic deformation mechanism in a compression ration adjustment device comprises a circular inclined plane driving disk which is arranged at the central position of the mechanism and an annular incline plane supporting ring which is arranged on the outer side of the circular inclined plane driving disk, wherein steel balls are uniformly distributed ina V-shaped ring slot which is enclosed by the supporting inclined plane of the annular inclined plane supporting ring and the driving incline plane of the circular inclined plane driving disk; elastic reset elements are arranged on the upper sides of the steel balls; and the bottom surfaces of the elastic reset elements are pressed against the steel balls. Compared with a mechanically-elastic deformation mechanism which is not optimized, the mechanically-elastic deformation mechanism eliminates a spring seat disc and can make the elastic reset elements positioned in a force arm alteration state when the steel balls are moved, so that the requirements of high rigidity before the application of pre-tightening force and low rigidity after the application of the pre-tightening force of the mechanically-elastic deformation mechanism can be better met. The piston has a simpler structure and lower cost, is more reliably operated, and has the compression ratio which can also be subjected to quick adaptability alteration along with the working condition of an engine.

The invention discloses a a piston type internal combustion engine variable compression ratio adjusting device. The device comprises a force transmission rod for being connected with a piston, a connecting rod, a swing rod and a cam, and the force transmission rod is used for transmitting the explosive force of a piston to the swing rod; the connecting rod is provided with a large head end and a small head end, and the large head end of the connecting rod is connected with a crankshaft for transmitting power to the crankshaft to drive the crankshaft to conduct rotation output; the left end ofthe swinging rod is rotatably connected with the force transmitting rod through a swinging rod pin, and the right end of the swinging rod is rotatably connected to the small head end of the connectingrod through a swing rod; the cam is provided with a cam shaft, the cam is an eccentric circular structure, the center of rotation of the cam shaft deviates a certain distance from the center of the cam, the cam shaft is mounted on a bearing hole of a body, the middle of the swing rod is mounted on the cam, and the swing rod is rotated around the cam shaft through the cam to change the center of the rotating and swing of the swing rod, thereby changing a top dead center of the piston. The device changes the compression ratio by changing the top dead center of the piston, and the compression ratio is continuously adjustable.

A variable compression ratio apparatus is provided and is installed within an engine rotating a crankshaft upon receiving combustion power of a mixture from a piston and changes a mixture compression ratio based on an engine driving condition. The apparatus includes a connecting rod at which a small end forming a circular aperture to be rotatably connected with a piston pin moving together with the piston, a larger end rotatably connected with a crankpin eccentrically arranged with respect to the crankshaft, and an acting oil passage formed to supply hydraulic pressure from the larger end to the small end, are formed. An eccentric cam is concentrically arranged and rotatably disposed in the small end aperture and the piston pin is eccentrically inserted thereinto and is rotatably connected therewith. A latching pin selectively latches the small end with the cam by supply of hydraulic pressure through the acting oil passage.

The invention discloses a supercharger capable of changing the compression ratio. The supercharger comprises a gas inlet pipe, an exhaust pipe, a shell, a first rotor, a second rotor, a gear set and abelt pulley; and meanwhile, the invention discloses an engine compression ratio regulation technology, and the engine compression ratio regulation technology comprises the following specific regulation steps that S1, an exhaust port of the exhaust pipe is connected to an engine gas inlet in series; S2, a gas inlet baffle or/and a gas outlet baffle is/are adjusted to pre-compress gas entering an engine air cylinder; and S3, the gas inlet baffle or/and the gas outlet baffle is/are readjusted, and thus the pressure of the gas entering the engine air cylinder is different from the pressure of thegas entering the engine air cylinder in the step S2 so as to regulate the engine compression ratio. According to the supercharger capable of changing the compression ratio, application of the supercharger to an engine and a regulation method, the engine compression ratio is changed by adjusting the gas inlet pre-compression ratio under the situation of not changing the engine structure, and engine performance is improved in a low-cost mode.