50results about How to "Increase compression pressure" patented technology

A bone screw assembly for joining bone fragments having a screw shaft, a compression head and a sleeve. The compression head has external threads for providing double compression of the bone fragments. The sleeve extends along and around the screw shaft to provide reinforcing strength and alignment to the screw.

An engine stopping and starting control device includes a prediction means, a control means, and a start control means. The prediction means predicts a cylinder on a compression stroke upon a stop during a process for stopping an engine. The control means controls a fuel injection upon a stop that injects fuel into the cylinder during the process for stopping the engine to seal an air-fuel mixture therein. The start control means fires the cylinder to generate a first explosion to start the engine.

In an internal combustion engine equipped with a variable compression ratio mechanism, the occurrence of knocking is reduced during deceleration. When it is determined that a target compression ratio of the variable compression ratio mechanism is greater than a threshold PRSL during the deceleration, an air bypass valve interposed in a passage for bypassing a compressor of an exhaust turbo supercharger is opened to return intake air upstream (between the compressor and a throttle valve) of the throttle valve to upstream of the compressor, thereby reducing intake pressure upstream of the throttle valve and reducing in-cylinder compression pressure to reduce the occurrence of knocking.

A system for individualized treatment of a tissue condition with acoustic pressure shocks includes personalized determination and automatic adjustment of a shock wave treatment regimen or shock wave dosage to be administered for personalized treatment based on factors such as a patient's comorbidities, state of the tissue condition, individual physical characteristics and lifestyle parameters.

[Technical Problem] To provide an engine capable of increasing an introducing amount of an EGR gas without reducing an introducing amount of a fresh air.

[Means for Solving the Problems] In an engine structured to introduce a fresh air and an EGR gas into a cylinder, the EGR gas is introduced into the cylinder at least at a part of a compression stroke using a pressure in a combustion chamber at least at a part of a power stroke.

A steam engine with improved intake and exhaust flow provided by separate pairs of intake and exhaust ports located at both ends of a steam drive cylinder. A slide valve located adjacent to the drive cylinder provides for timed sealing of intake and exhaust ports during operation. Exhaust is facilitated by the provision of two paths of exhaust from the cylinder and the exhaust ports may be adjusted for a flow volume to meter exhaust steam flow to significantly reduce back pressure only at low speeds of said engine.

The invention relates to a nanometer synthetic lubricant and a preparation method thereof. The nanometer synthetic lubricant comprises the following raw materials in percentage by weight: 60-90% of a lubricant base oil, 0.1-0.6% of a nanometer material, 3-13% of an antioxidant, 4-16% of a dispersant, 1-5% of a tackifier, and 1.9-5.4% of an anti-wear additive. The nanometer synthetic lubricant is prepared by mixing and refining the lubricant base oil, the nanometer material, the antioxidant, the dispersant, the tackifier, and the anti-wear additive by a high shear emulsion production line. The invention has the following beneficial effects that the nanometer synthetic lubricant is a comprehensive technology which can facilitate the energy conservation, emission reducing, environment protecting and efficiency increasing of internal combustion engines and automobile engines, and in the premise of saving a lot of operation cost, the nanometer synthetic lubricant can advance the achievement of the emission reduction goal which is superior to 'state V emission standards', the level of PM2.5 is reduced in the excellent emission standard, and the high-powered driving fun of users brought by the pressure of a cylinder of the engine is recovered and improved.

The present invention concerns a method for operating and arrangement of a pneumatic piston engine. The pneumatic piston engine (1) includes a cylinder (2) including a piston (3) kinematically joined via a crank (4) to a crankshaft (5) and a working chamber (6) supplied with a means (7) for supply of compressed air and a means (8) for exhaust of air. The starting of supply of compressed air is realized while the piston (3) is in the region within the range from 40° before top dead center to 25° after top center by angle of rotation o the crank of the crankshaft depending on engine speed, and the ending of supply is realized while the piston (3) is in the region within the range from 0° to 90° after top dead center by angle of rotation of the crank of the crankshaft. In particular case when engine speed is 2.12 s<-1>, the optimum mode of operating is achieved provided that supply of compressed air starts when the piston (3) is in position of 2° before the top dead center and ends when the piston (3) is in position of 5° after the top dead center by angle of rotation of the crank of the crankshaft. The invention provides decrease of specific fuel consumption approximately by a factor of 5-6 and simultaneous increase of the piston specific power.

An arrangement for a reciprocating internal combustion engines is provide that includes a reciprocating main piston and a smaller cell piston which works in cooperation with the main piston to vary the compression ratio of and igniting a fuel-air mixture in a homogenous compression ignition engine. An actuator controls movement of the smaller cell piston relative to movement of the main piston.

The invention relates to a refrigerating and compressing expansion machine which comprises an oil pump, a gas-liquid energy conversion cylinder, a gas circuit reversing control valve, a reversing valve and the like. The working principle of the machine provided by the invention is as follows: when the oil pump begins operating, the gas circuit reversing control valve and the reversing valve enable hydraulic oil generated by the oil pump to enter a left hydraulic oil cylinder and a right hydraulic oil cylinder of the gas-liquid energy conversion cylinder alternatively, introduce the cooled high-pressure gas into an expansion cavity for expansion to do work, and jointly push a piston to move left and right to compress the gas in a compression cavity; the gas is discharged into a cooling device; heat is discharged and temperature is lowered in the cooling device, the gas enters an evaporator after being subjected to further temperature reduction and depressurization performed by a heat regenerator and a throttling valve, and the gas is subjected to heat absorption, evaporation and refrigeration; and the generated steam is absorbed into the gas-liquid energy conversion cylinder again. Because hydraulic oil is generated by the hydraulic pump, higher compression pressure can be obtained easily, and the compression of carbon dioxide is realized through a gas-liquid energy converter; and the gas leakage is less, and the gas transmission efficiency is high.

The invention relates to a dewatering and drying device belonging to the technical field of dewatering and drying treatment. The dewatering and drying device is characterized by comprising a base, a pressure piston, pressure-withstanding sleeves and a dual-layer filter screen mechanism, wherein a dual-layer filter screen is arranged on the base and the pressure-withstanding sleeve is connected to the dual-layer filter screen, the pressure piston is arranged on the pressure-withstanding sleeve oppositely and provided with a pressure tongue, and a pushing hydraulic cylinder is connected to the pressure piston. The dewatering and drying device has the advantages of simple structure, large compression pressure, short compression time, low compression water content, convenience for treatment, rapidness in maintenance, low operation cost, capability of massive array-forming type operation, high production efficiency and the like.

The invention relates to a device for the continuous production of plate-shaped products, comprising two endless strips which are positioned one above the other and can be driven. A working gap is formed between the sides of said endless strips, said sides being adjacent to one another and each being conveyed via a support surface. The starting material for processing is conveyed through said working gap which is bordered on each side by an accompanying strip. Said accompanying strip is situated along said working gap between the two endless strips and moves with them, consisting of a flexible sealing strip which has a friction surface on at least one face, said face facing towards an endless strip. Said friction surface increases the static friction between the flexible sealing strip and the endless strip.

A method of preparing a malleable and/or self-healing polymeric or composite material is provided. The method includes providing a polymeric or composite material comprising at least one alkene-containing polymer, combining the polymer with at least one homogeneous or heterogeneous transition metal olefin metathesis catalyst to form a polymeric or composite material, and performing an olefin metathesis reaction on the polymer so as to form reversible carbon-carbon double bonds in the polymer. Also provided is a method of healing a fractured surface of a polymeric material. The method includes bringing a fractured surface of a first polymeric material into contact with a second polymeric material, and performing an olefin metathesis reaction in the presence of a transition metal olefin metathesis catalyst such that the first polymeric material forms reversible carbon-carbon double bonds with the second polymeric material. Compositions comprising malleable and/or self-healing polymeric or composite material are also provided.

A method for easing child birth and, more particularly, to a device for practicing the method for easing child birth and, most particularly, to a device for easing child birth controlled by the individual giving birth to the child. The device mechanically replaces a “manual” contact, which can be applied to the pelvis of a woman in labor, for the purpose of aiding the expulsion of the baby, and reduce the pain and discomfort associated with this process. The device mechanically compresses the ilium portion of the pelvis medially and posteriorly, simultaneously. The pressure applied by the device is under full control of the patient, so that pressure is applied slowly and progressively to a point of maximum comfort. The pressure is decreased immediately upon demand by the patient. The duration of the application of compression corresponds with the length of the contraction period for the woman.

The invention discloses a small-gap and low- friction piston component which comprises a piston, a cylinder sleeve, a piston ring and a piston pin, wherein the piston comprises a head part and a skirt part; the cross section of the head part of the piston is elliptical. The piston provided by the invention is better in airtightness, the combustion efficiency is improved, further the compression pressure is increased, fuel oil is saved, and tail gas emission is reduced accordingly.

A method of producing a machining segment, in which a green body (51) is constructed from a machining zone (54), wherein the machining zone (54) is produced from a first metallic powder material (56) and hard material particles (58), the green body (51) is compacted under pressure with a compression pressure to result in a compact body and the compact body is sintered thermally at a sintering temperature to result in the finished machining segment, wherein the machining zone (54) is produced by layer-by-layer application of material layers of the first metallic powder material (56) and particle layers of the hard material particles (58), wherein the hard material particles (58) in one particle layer are placed into the previously applied material layer of the first metallic powder material (56).