33results about How to "Increase cylinder pressure" patented technology

A control system for engine braking for a vehicle powered by a turbocharged engine uses a supercharger to assist a turbocharger compressor to boost turbocharger air flow into the engine cylinders. An engine driven air pumping device draws ambient air, or alternately exhaust gas through the pump inlet, compresses the air, and delivers the compressed air through the pump outlet to the turbocharger compressor inlet or alternately the turbocharger compressor outlet. The increased air flow into the cylinders and out of the cylinder exhaust valves increases retarding power of the vehicle.

The invention relates to lubricating oil containing surface modified carbon nanomaterials and a preparation method thereof, in particular to lubricating oil containing graphene, carbon nanotubes and nanocarbon fibers and a preparation method thereof. Graphene, carbon nanotubes and carbon nanofibers are coated with polydopamine and grafted with long-carbon-chain paraffins correspondingly on surfaceto obtain corresponding modified carbon nanomaterials. The modified carbon nanomaterials, base oil, and other lubricant functional additives are mixed in proportion to obtain the lubricating oil containing the surface modified carbon nanomaterials. The lubricating oil containing the surface modified carbon nanomaterials and the preparation method thereof solve problems of stability and dispersibility, produces ball effects and supporting effects, and further produce a solid-liquid dual-function lubrication mechanism and a stable porous structure, and remarkably improve performance of the lubricating oil.

The invention discloses a double-cylinder two-stroke cylinder engine, belonging to the technical field of engines. The double-cylinder two-stroke cylinder engine comprises two gas cylinders which are oppositely arranged, two double-ended pistons, and a crankshaft, wherein inner cavities of the gas cylinders are manufactured into circular-ring-shaped curved surfaces; piston inlets are formed in the two ends of each gas cylinder; a central shaft is arranged between the two gas cylinders; each double-ended piston comprises a piston arm, wherein piston heads are fixed at the two ends of the piston arm; the piston arm is hinged on the central shaft; a sealed combustion chamber is formed between the two opposite piston heads of the gas cylinder; a connecting rod is hinged between the piston arm and the crank of the crankshaft; the crankshaft, the connecting rod, the piston arm and the central shaft form a crankshaft rocker rod mechanism capable of synchronously swinging the double-ended pistons, and enabling the piston heads to rotate back and forth around the central shaft between inner and outer stop points. The double-cylinder two-stroke cylinder engine can be used for effectively lowering the abrasion and impact of the piston and the cylinder sleeve, greatly improving the reliability of the ceramic material applied to the engine and improving the practical heating efficiency.

The invention provides a cogeneration condensing steam turbine, which comprises two parts, e.g., a high / intermediate-pressure module and an intermediate / low-pressure module. The high / intermediate-pressure module comprises a high / intermediate-pressure cylinder. The intermediate / low-pressure module comprises an intermediate / low-pressure cylinder. A cylinder separation point of the high / intermediate-pressure cylinder and the intermediate / low-pressure cylinder is arranged in intermediate-pressure circulation, and cylinder separation pressure is 1 to 3MPa. The intermediate-pressure end of the high / intermediate-pressure cylinder is communicated with the intermediate-pressure end of the intermediate / low-pressure cylinder through a communicating pipe. A steam extraction pipe is arranged at a steam exhaust port of the high / intermediate-pressure cylinder or on the communicating pipe. According to the steam turbine, the cylinder separation point is arranged in the intermediate-pressure circulation, the steam turbine is divided into the two parts, e.g., the high / intermediate-pressure module and the intermediate / low-pressure cylinder, and compared with the conventional steam turbine adopting a steam extraction regulation mode of arranging a rotary partition plate or a built-in steam extraction regulation valve in a runner of the steam turbine, the steam turbine has the advantages that difficulty in the design of the steam turbine is effectively lowered, and the internal efficiency of a cogeneration turboset is improved; and in addition, the cylinder separation pressure of the high / intermediate-pressure cylinder and the intermediate / low-pressure cylinder is increased, so that the steam extraction pressure of the steam extraction pipe can be increased, and the adaptability of such a steam extraction mode to steam extraction parameters can further be improved effectively.

The invention discloses a double-crank mechanism engine, belonging to the technical field of engines. The double-crank mechanism engine comprises a gas cylinder and a piston capable of performing straight reciprocating motion in the gas cylinder, wherein two parallel crankshafts are arranged at the two sides of the gas cylinder; a connecting rod is hinged between corresponding crankshaft pins of the two crankshafts to form a double-crank mechanism; a connecting rod insertion slot and a slide block are arranged on a piston rod on the rear end of the piston, the connecting rod is inserted to the connecting rod insertion slot in a sliding manner, a guide block is fixed in the engine; a guide rail for sliding the slide block is formed on the guide block; the slide block is inserted to the guide rail; transmission gears are arranged on the end parts of the crankshafts; an output gear is engaged between the two transmission gears; and an output shaft is arranged on the output gear. The double-crank mechanism engine can be used for effectively lowering the abrasion and the impact of the piston and a cylinder sleeve, improving the reliability of the ceramic material applied to the engine and improving the practical heating efficiency.

A refrigeration device having a closed circuit in which a flow rate of coolant is circulating is provided. The closed circuit has a condenser and a main branch provided with a reciprocating compressor inside which a defined flow rate of the coolant enters, from the main branch, at a defined suction pressure, of an evaporator and a first expansion valve that is arranged between the condenser and the evaporator. The closed circuit further has a first secondary economizer branch for a first fraction of flow rate of the coolant, the first secondary economizer branch fluidically connecting the compressor to a section of the closed circuit between the condenser and the first expansion valve, wherein the compressor has a first side inlet port for the entrance of the first fraction of coolant flow rate.

The invention discloses an upper end sealing and lubricating device for a rotary engine. The top end sealing and lubricating device at least comprises a high pressure lubricating oil pump, an oil conveying pipe, a high pressure spraying nozzle, a lubricating oil spraying hole, an oil return pipe, an axial oil pipe, a radial oil pipe, an top end sealing fin, a corner sealing strip, an top end sealing groove and a side shell. The lubricating oil spraying hole is formed in the side shell of the engine; and the high pressure spraying nozzle is installed in the lubricating oil spraying hole. The top end sealing fin comprises three sealing fins; the two sealing fins on the outer side are the rigid sealing fins; and the middle sealing fin is the flexible sealing fin. When the engine is at work, the top end sealing fin radially extrudes a profile of an air cylinder to form a sealed working face. Sucked lubricating oil is sprayed into the axial oil pipe through the high pressure spraying nozzle at high speed after being pressurized by the high pressure oil pump; and the lubricating oil enters the radial oil pipe through the centrifugal force and finally forms a continuous even lubricating oil film on the contact surface of the top end sealing fin and the profile of the air cylinder. The lubricating oil in the axial oil pipe diffuses outward into the gap between the end face of a rotor and the inner wall of the side shell from bilateral pipe mouths to be in action of lubricating a side sealing face.

The invention provides an immediately available anti-wear lubricant additive with environmental protection, high efficiency and low cost and a preparation method thereof, and the method comprises the steps as follows according to the parts by weight: 1) putting lead oxide of 15 to 20 parts into base oil 650SN of 80 to 90 parts under room temperature, and giving stirring to produce paste; 2) giving heating and stirring for naphthenic acid of 250 parts until to temperature between 95 and 105 DEG C, slowly adding the naphthenic acid into the pasty mass, and then giving stirring for 3 to 3.5 hours under the constant temperature 95 and 105 DEG C, to acquire mother liquid; 3) adding base oil 650SN of 50 parts, pour point depressants of 2 to 3 parts, high-alkaline synthetic calcium sulphonate as detergent of 10 parts, ashless dispersant with polyisobutylene and multi-succimide of 10 parts, sulphur and phosphorous secondary-alcohol radical zinc salt as antioxidant and corrosion inhibitor of 10 parts, high-alkaline sulfonate as anti-wear additive of 3 to 6 parts, and sulfurized calcium alkyl detergent of 10 to 15 parts; 4) stirring for 1.5 hours under the constant temperature between 70 and 80 DEG C; 5) filtering. The preparation method of the invention has the advantages of simple procedures, no waste water or gas, environmental protection, high efficiency, low cost and high yielding. The anti-wear lubricating oil additive acquired by the preparation method can be used in combination with the lubricating oil, and extend the exchange period two to three times longer and the service life of engines one to two times longer.